CADILLAC: January 2020

Friday, January 31, 2020

2010 Cadillac CTS Sedan AWD V6-3.6L Page 1568

* Fuel Tank Pressure Sensor Replacement (See: Powertrain Management/Computers and Control Systems/Fuel Tank Pressure Sensor/Service

and Repair)

* Fuel Pressure Sensor Replacement - Fuel Injection Fuel Rail (LF1) (See: Powertrain Management/Fuel Delivery and Air Induction/Fuel

Pressure Sensor/Switch/Service and Repair)Fuel Pressure Sensor Replacement - Fuel Injection Fuel Rail (LLT) (See: Powertrain

Management/Fuel Delivery and Air Induction/Fuel Pressure Sensor/Switch/Service and Repair)

* Engine Oil Pressure Sensor and/or Switch Replacement (See: Engine, Cooling and Exhaust/Engine/Engine Lubrication/Oil Pressure

Sensor/Service and Repair)

* Camshaft Position Sensor Replacement - Bank 1 (Right Side) Intake (See: Powertrain Management/Computers and Control

Systems/Camshaft Position Sensor/Service and Repair/Camshaft Position Sensor Replacement - Bank 1 (Right Side) Intake)

* Camshaft Position Sensor Replacement - Bank 1 (Right Side) Exhaust (See: Powertrain Management/Computers and Control

Systems/Camshaft Position Sensor/Service and Repair/Camshaft Position Sensor Replacement - Bank 1 (Right Side) Exhaust)

* Camshaft Position Sensor Replacement - Bank 2 (Left Side) Intake (See: Powertrain Management/Computers and Control

Systems/Camshaft Position Sensor/Service and Repair/Camshaft Position Sensor Replacement - Bank 2 (Left Side) Intake)

* Camshaft Position Sensor Replacement - Bank 2 (Left Side) Exhaust (See: Powertrain Management/Computers and Control

Systems/Camshaft Position Sensor/Service and Repair/Camshaft Position Sensor Replacement - Bank 2 (Left Side) Exhaust)

* Accelerator Pedal Position Sensor Replacement (See: Powertrain Management/Computers and Control Systems/Accelerator Pedal Position

Sensor/Service and Repair)

* Throttle Body Assembly Replacement (LF1) (See: Powertrain Management/Fuel Delivery and Air Induction/Throttle Body/Service and

Repair/Removal and Replacement)Throttle Body Assembly Replacement (LLT) (See: Powertrain Management/Fuel Delivery and Air

Induction/Throttle Body/Service and Repair/Removal and Replacement)

* Crankshaft Position Sensor Replacement (See: Powertrain Management/Computers and Control Systems/Crankshaft Position

Sensor/Service and Repair)

* Air Conditioning (A/C) Refrigerant Pressure Sensor Replacement (See: Heating and Air Conditioning/Refrigerant Pressure Sensor /

Switch/Service and Repair)

* Clutch Pedal Position Switch Replacement (See: Powertrain Management/Transmission Control Systems/Sensors and Switches -

Transmission and Drivetrain/Sensors and Switches - M/T/Clutch Pedal Position Sensor / Switch/Service and Repair)

P0653

DTC P0641-P0643, P0651-P0653, or P0697-P0699 (ECM, LLT)

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions) provides an overview of each diagnostic category.

DTC Descriptors

DTC P0641

- 5 V Reference 1 Circuit

DTC P0642

- 5 V Reference 1 Circuit Low Voltage

DTC P0643

- 5 V Reference 1 Circuit High Voltage

DTC P0651

- 5 V Reference 2 Circuit

DTC P0652

- 5 V Reference 2 Circuit Low Voltage

DTC P0653

- 5 V Reference 2 Circuit High Voltage

DTC P0697

- 5 V Reference 3 Circuit

DTC P0698

- 5 V Reference 3 Circuit Low Voltage

DTC P0699

- 5 V Reference 3 Circuit High Voltage

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1530

Note: If you were sent here from Engine Cranks But Does Not Run proceed to Circuit/System Testing.

1. Engine running, command the Engine Controls (EC) Ignition Relay ON and OFF with a scan tool while observing the following EC Ignition

Relay control circuit status parameters:

* Engine Controls Ignition Relay Control Circuit Low Voltage Test Status

* Engine Controls Ignition Relay Control Circuit Open Test Status

* Engine Controls Ignition Relay Control Circuit High Voltage Test Status

Each parameter should display OK or Not Run.

2. Ignition ON, you should be able to communicate with the ECM using a scan tool.

3. Ignition ON, view the DTC information with a scan tool. DTC P0685, P0686, P0687, P0689, or P0690 should not set.

4. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the

conditions that you observed from the Freeze Frame/Failure Records data.

Circuit/System Testing

1. Ignition OFF, disconnect the KR75 powertrain relay.

2. Ignition ON, verify a test lamp illuminates between both of the following relay battery voltage circuit terminals and ground.

* Terminal 86

* Terminal 87

瀚慖f the test lamp does not illuminate, test the relay battery voltage circuit for a short to ground or an open/high resistance.

Note: The ignition voltage circuit is between the powertrain relay and the ECM. The ignition voltage circuit is a feedback circuit.

3. Ignition OFF, verify that a test lamp does not illuminate between the ignition voltage circuit terminal 30 and ground.

瀚慖f the test lamp illuminates, test the ignition voltage circuit for a short to voltage.

4. Connect a 20 A fused jumper wire between the relay switch B+ circuit terminal 87 and the relay switch ignition voltage circuit terminal 30.

5. Ignition ON, observe the scan tool EC Ignition Relay Feedback Signal parameter. The ECM should communicate, and the parameter should

display 9-14 V.

瀚慖f not the specified range, or the ECM does not communicate, test the ignition voltage circuit between the powertrain relay and the ECM

for a short to ground or for an open/high resistance. If the circuit/connections test normal, replace the K20 ECM.

6. Ignition OFF, verify that a test lamp does not illuminate between the control circuit terminal 85 and B+.

瀚慖f the test lamp illuminates, test the control circuit for a short to ground. If the circuit tests normal, replace the K20 ECM.

7. Connect a DMM set to the diode setting between the control circuit terminal 85 and ground.

8. Ignition ON, verify the DMM does not display OL.

瀚慖f the DMM displays OL, test the control circuit for a short to voltage, or an open/high resistance. If the circuit tests normal, replace the

K20 ECM.

9. If all circuits test normal, replace the KR75 powertrain relay.

Component Testing

Note: Depending on the application, the relay coil resistance will be within one of the following ranges.

1. Test for one of the following resistance specifications between terminals 85 and 86 of the KR75 powertrain relay:

* 70-110 ohm

* 200-250 ohm

瀚慖f not within the specified range, replace the KR75 powertrain relay.

2. Measure for infinite resistance between the following terminals of the KR75 powertrain relay:

* 30 and 86

* 30 and 87

* 30 and 85

* 85 and 87

瀚慖f continuity is detected, replace the KR75 powertrain relay.

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 776

the K17 EBCM.

3. Install a 3 A fused jumper wire at the signal circuit terminal B. Verify the scan tool Wheel Speed Sensor parameter changes while rapidly

tapping the fused jumper wire to the low reference circuit terminal A.

瀚慖f no change is observed, disconnect the harness connector at the K17 EBCM and test for the following conditions below. If all circuits

test normal, replace the K17 EBCM.

* Signal circuit for short to voltage.

* Low reference circuit for a short to voltage, short to ground, or an open/high resistance.

4. If all circuits test normal, test or replace the B5 wheel speed sensor.

Component Testing

Note: The following wheel speed sensor test is polarity sensitive. The wheel speed sensor can be permanently damaged if the polarity is reversed

during the test.

1. Ignition OFF, disconnect the harness connector at the appropriate B5 wheel speed sensor.

2. Connect a 3 A fused jumper wire between the signal terminal 1 and 12 V.

3. Connect a DMM set to read DC amperage between the low reference terminal 2 and ground.

4. Spin the wheel very slowly, test for a DC current switching between a low value of 4-8 mA and a high value of 11-16 mA.

瀚慖f not within the specified range, replace the B5 wheel speed sensor.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

* Front Wheel Speed Sensor Replacement (See: Brakes and Traction Control/Antilock Brakes / Traction Control Systems/Wheel Speed

Sensor/Service and Repair/Front Wheel Speed Sensor Replacement)

* Rear Wheel Speed Sensor Replacement (See: Brakes and Traction Control/Antilock Brakes / Traction Control Systems/Wheel Speed

Sensor/Service and Repair/Rear Wheel Speed Sensor Replacement)

* Control Module References (See: Testing and Inspection/Programming and Relearning) for EBCM replacement, setup and programming

C0050

DTC C0035, C0040, C0045, or C0050

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions) provides an overview of each diagnostic category.

DTC Descriptor

DTC C0035 06

- Left Front Wheel Speed Sensor Circuit Low Voltage/Open

DTC C0035 0F

- Left Front Wheel Speed Sensor Circuit Signal Erratic

DTC C0035 18

- Left Front Wheel Speed Sensor Circuit Low Signal Amplitude

DTC C0035 5A

- Left Front Wheel Speed Sensor Circuit Not Plausible

DTC C0040 06

- Right Front Wheel Speed Sensor Circuit Low Voltage/Open

DTC C0040 0F

- Right Front Wheel Speed Sensor Circuit Signal Erratic

DTC C0040 18

- Right Front Wheel Speed Sensor Circuit Low Signal Amplitude

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 166

2. Verify that DTC B0081 11 or DTC B0081 4B is not set in the passenger presence module.

瀚慖f DTC B0081 11 or DTC B0081 4B is set in the passenger presence module, perform the Passenger Presence System Preload procedure.

Refer to Passenger Presence System Preload Test (See: Restraints and Safety Systems/Air Bag Systems/Description and

Operation/Passenger Presence System Preload Test).

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

Control Module References (See: Testing and Inspection/Programming and Relearning) for passenger presence module or SDM replacement,

setup, and programming

B0082

DTC B0082

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions) provides an overview of each diagnostic category.

DTC Descriptors

DTC B0082 01

- Seat Belt Reminder Sensor Short to Battery

DTC B0082 02

- Seat Belt Reminder Sensor Short to Ground

DTC B0082 04

- Seat Belt Reminder Sensor Open Circuit

Diagnostic Fault Information

Circuit/System Description

The seat belt reminder sensor is in the passenger seat cushion and provides an input to the inflatable restraint sensing and diagnostic module

(SDM). The SDM supplies a low reference circuit and a seat belt reminder sensor signal circuit to determine seated or unseated condition of

passenger seat.

Conditions for Running the DTC

Ignition voltage is between 9-16 V.

Conditions for Setting the DTC

B0082 01

The SDM detects a short to voltage in the seat belt reminder sensor signal circuit.

B0082 02

The SDM detects a short to ground in the seat belt reminder sensor signal circuit

B0082 04

The SDM detects an open/high resistance in the seat belt reminder sensor signal circuit or the seat belt reminder sensor ground circuit

2010 Cadillac CTS Sedan AWD V6-3.6L Page 1447

Conditions for Setting the DTC

P0480

The ECM detects an open in the cooling fan relay 1 control circuit.

P0481

The ECM detects an open in the cooling fan relay 2 control circuit.

P0691

The ECM detects a short to ground in the cooling fan relay 1 control circuit.

P0692

The ECM detects a short to voltage in the cooling fan relay 1 control circuit.

P0693

The ECM detects a short to ground in the cooling fan relay 2 and 3 control circuit.

P0694

The ECM detects a short to voltage in the cooling fan relay 2 and 3 control circuit.

Action Taken When the DTC Sets

DTCs P0480, P0481, P0691, P0692, P0693, and P0694 are Type B DTCs.

Conditions for Clearing the MIL/DTC

DTCs P0480, P0481, P0691, P0692, P0693, and P0694 are Type B DTCs.

Diagnostic Aids

* The scan tool cooling fan output control operates as follows:

- Cooling Fan Relay 1 operates the fan at a low speed

- Cooling Fan Relay 2 and 3 operates the fan at a medium speed

- Cooling Fan Relay 1, 2 and 3 operates the fan at a high speed

* KR20 cooling fan relay identification:

- KR20C cooling fan low speed FAN 1 Relay

- KR20D cooling fan high speed FAN 2 Relay

- KR20E cooling fan speed control FAN 3 or S/P Relay

* When disconnecting or removing fuses and relays from a fuse block, always inspect the component electrical terminals for corrosion and the

correct orientation in the fuse block. Test the mating electrical terminals for tightness.

Reference Information

Schematic Reference

Engine Cooling Schematics (See: Engine, Cooling and Exhaust/Cooling System/Diagrams)

Connector End View Reference

Component Connector End Views (See: Diagrams/Connector Views)

Description and Operation

Cooling Fan Description and Operation (See: Engine, Cooling and Exhaust/Cooling System/Description and Operation)

Electrical Information Reference

* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/Circuit Testing/Circuit Testing)

* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/Connector Repairs/Connector Repairs)

* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/Circuit

Testing/Testing for Intermittent Conditions and Poor Connections)

* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/Wiring Repairs/Wiring Repairs)

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Technical Service Bulletin # 03-07-29-004H Date: 120530

M/T - Operating Characteristics Information

INFORMATION

Bulletin No.: 03-07-29-004H

Date: May 30, 2012

Subject: Manual Transmission Operating Characteristics

Models:

2013 and Prior GM Passenger Cars and Light Duty Trucks

2009 and Prior Chevrolet and GMC Medium Duty Trucks

Equipped with Manual Transmission

Supercede:

This bulletin is being revised to add model years. Please discard Corporate Bulletin Number 03-07-29-004G (Section 07 - Transmission/Transaxle).

Important:

Even though this bulletin attempts to cover operating characteristics of manual transmissions, it cannot be all inclusive. Be sure to compare any

questionable concerns to a similar vehicle and if possible, with similar mileage. Even though many of the conditions are described as characteristics

and may not be durability issues, GM may attempt to improve specific issues for customer satisfaction.

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 40

The purpose of this bulletin is to assist in identifying characteristics of manual transmissions that repair attempts will not change. The following are

explanations and examples of conditions that will generally occur in all manual transmissions. All noises will vary between transmissions due to

build variation, type of transmission (usually the more heavy duty, the more noise), type of flywheel and clutch, level of insulation, etc.

Basic Information

Many transmission noises are created by the firing pulses of the engine. Each firing pulse creates a sudden change in angular acceleration at the

crankshaft. These changes in speed can be reduced with clutch damper springs and dual mass flywheels. However, some speed variation will make

it through to the transmission. This can create noise as the various gears will accel and decel against each other because of required clearances.

Cold Operation

Manual transmission operation will be affected by temperature because the transmission fluid will be thicker when cold. The thicker fluid will

increase the amount of force needed to shift the transmission when cold. The likelihood of gear clash will also increase due to the greater time

needed for the synchronizer assembly to perform its function. Therefore when the transmission is cold, or before it has reached operating

temperature, quick, hard shifts should be avoided to prevent damage to the transmission.

Gear Rattle

Rattling (not to be confused with a missed shift type of grinding, also described as a combustion knock type of noise) type noises usually occur

while operating the engine at low RPMs (lugging the engine). This can occur while accelerating from a stop (for example, a Corvette) or while

operating at low RPMs while under a load (for example, Kodiak in a lower gear and at low engine speed). Vehicles equipped with a dual-mass

flywheel (for example, a 3500 HD Sierra with the 6-speed manual and Duramax) will have reduced noise levels as compared to vehicles without

(for example, a 4500 Kodiak with the 6-speed manual and Duramax). However, dual-mass flywheels do not eliminate all noise.

Neutral Rattle

There are often concerns of rattle while idling in neutral with the clutch engaged. This is related to the changes in angular acceleration described

earlier. This is a light rattle, and once again, vehicles with dual mass flywheels will have reduced noise. If the engine is shut off while idling in

neutral with the clutch engaged, the sudden stop of the engine will create a rapid change in angular acceleration that even dual mass flywheels

cannot compensate. Because of the mass of all the components, this will create a noise. This type of noise should not be heard if the clutch is

released (pedal pushed to the floor).

Backlash

Backlash noise is created when changing engine or driveline loading. This can occur when accelerating from a stop, coming to a stop, or applying

and releasing the throttle (loading and unloading the driveline). This will vary based on vehicle type, build variations, driver input, vehicle loading,

etc. and is created from the necessary clearance between all of the mating gears in the transmission, axle(s) and transfer case (if equipped).

Shift Effort

Shift effort will vary among different style transmissions and synchronizer designs. Usually the more heavy duty the transmission, the higher the

shift effort because of the increased mass of the components. Shift effort can also be higher in cold weather because the fluid will be thicker.

Medium duty transmissions will not shift as quickly as a Corvette transmission. To reduce shift effort, do not attempt to rush the shift - allow the

synchronizers to work as designed. Shifting harder will only increase the chance of rushing past the synchronizer leading to grinding while shifting.

Non-Synchronized Gears

Some light duty truck transmissions in 1st gear (creeper-gear) and reverse gears in various transmissions, along with all gears in some medium duty

transmissions, may be non-synchronized. This means there is not a mechanism to match input and output shaft speeds to allow for a smooth shift.

This function is left up to the driver. This can be noticed if a shift into 1st or reverse is attempted while the vehicle is rolling or before the input

shaft stops rotating leading to a gear grind. The grinding can be reduced by coming to a complete stop and pausing for a moment before shifting

into the 1st or reverse gear. Some slight grinding can be expected. In medium duty non-synchronized transmissions, the driver must match input

shaft (engine) speed to output shaft (driveshaft) speed with every shift. This can be accomplished by double clutching, or by using other methods. If

the driver is not able to perform this function properly, there will be gear grinding with each improperly completed shift. Driver training may be

required to correct this condition. Clutch brakes are used in medium duty non-synchronized transmissions to allow a shift into gear at a stop. The

clutch brake is used to stop the input shaft from spinning, allowing a shift into gear at a stop without grinding. The clutch brake is activated by

pressing the clutch pedal all the way to the floor. When the clutch brake is used, it is possible to have a blocked shift with the vehicle stationary. If

this occurs, engage the clutch slightly to rotate the input gear to allow the shift. The clutch brake is intended to only be used while at a stop. Care

must be taken to not activate the clutch brake while shifting between gears. This could lead to excessive grinding or a blocked or missed shift.

Skip Shift

Currently, the Cadillac CTS-V, Pontiac GTO, Chevrolet Corvette and Camaro SS (other models may follow) equipped with the 6-speed manual

transmission have a feature referred to as a "skip-shift." This feature only allows a shift from 1st to 4th gear when the indicator lamp is illuminated

on the dash. Dealers cannot disable this feature as it was established to help meet fuel economy standards. The conditions for this feature are:

engine coolant at normal operating temperature, vehicle speed of 24-31 km/h (15-19 mph), 21% or less throttle being used (refer to Service

2010 Cadillac CTS Sedan AWD V6-3.6L Page 1483

* The DTC becomes history when the conditions for setting the DTC are no longer present.

* The history DTC clears after 40 malfunction-free warm-up cycles.

Reference Information

Schematic Reference

Instrument Cluster Schematics (See: Diagrams/Electrical Diagrams/Instrument Panel, Gauges and Warning Indicators/System Diagram/Instrument

Cluster Schematics)

Connector End View Reference

Component Connector End Views (See: Diagrams/Connector Views)

Description and Operation

* Indicator/Warning Message Description and Operation (See: Instrument Panel, Gauges and Warning Indicators/Description and

Operation/Indicator/Warning Message)

* Instrument Cluster Description and Operation (See: Instrument Panel, Gauges and Warning Indicators/Description and

Operation/Instrument Cluster)

Electrical Information Reference

* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/Circuit Testing/Circuit Testing)

* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/Connector Repairs/Connector Repairs)

* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/Circuit

Testing/Testing for Intermittent Conditions and Poor Connections)

* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/Wiring Repairs/Wiring Repairs)

Scan Tool Reference

Control Module References (See: Testing and Inspection/Programming and Relearning)for scan tool information

Circuit/System Verification

1. Engine running, observe the scan tool Engine Oil Pressure Sensor parameter. The reading should be between 0.2-4.8 volts.

2. Verify the engine oil pressure, refer to:

* Oil Pressure Diagnosis and Testing (See: Engine, Cooling and Exhaust/Engine/Testing and Inspection/Component Tests and General

Diagnostics/Oil Pressure Diagnosis and Testing)for the 3.6L engine

* Oil Pressure Diagnosis and Testing (See: Engine, Cooling and Exhaust/Engine/Testing and Inspection/Component Tests and General

Diagnostics/Oil Pressure Diagnosis and Testing)for the 4.8L, 5.3L, 6.0L, 6.2L or 7.0L engine

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the engine oil pressure (EOP) sensor.

2. Ignition OFF, test for less than 1.0 ohm between the low reference circuit terminal C and ground.

瀚慖f greater than the specified range, test the circuit for an open/high resistance. If the circuit tests normal, replace the ECM.

3. Ignition ON, test for 4.8-5.2 volts between the 5-volt reference circuit terminal B and ground.

瀚慖f less than the specified range, test the 5-volt reference circuit for a short to ground or an open/high resistance. If the circuit tests normal,

replace the ECM.

瀚慖f greater than the specified range, test the 5-volt reference circuit for a short to voltage. If the circuit tests normal, replace the ECM.

4. Verify the scan tool Engine Oil Pressure Sensor parameter is less than 0.2 volt.

瀚慖f greater than the specified range, test the signal circuit terminal A for a short to voltage. If the circuit tests normal, replace the ECM.

5. Install a 3A fused jumper wire between the signal circuit terminal A and the 5-volt reference circuit terminal B. Verify the scan tool Engine

Oil Pressure Sensor parameter is greater than 4.8 volts.

瀚慖f less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace

the ECM.

6. If all circuits test normal, test or replace the EOP sensor.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Technical Service Bulletin # 09-08-52-004A Date: 100108

Keyless System - Remote Start Transmitter Diagnostic Tip

INFORMATION

Bulletin No.: 09-08-52-004A

Date: January 08, 2010

Subject: Diagnostic Tips/Recommendations on GM Accessory 2-Way Remote Start Transmitter When Transmitter Battery is Weak or Dead

Models:

2007-2010 Buick Lucerne

2008-2010 Buick Enclave

2007-2010 Cadillac DTS, Escalade, Escalade ESV, Escalade EXT

2007-2009 Chevrolet Equinox

2007-2010 Chevrolet Avalanche, Cobalt, HHR, Impala, Silverado, Tahoe

2009-2010 Chevrolet Malibu, Traverse

2007-2010 GMC Acadia, Sierra, Yukon

2007-2009 Pontiac G5, G6, Solstice, Torrent

2008-2009 Pontiac G8

2007-2010 Saturn AURA, OUTLOOK, SKY, VUE

2007-2010 HUMMER H2

Supercede:

This bulletin is being revised to update the models and model years. Please discard Corporate Bulletin Number 09-08-52-004 (Section 08 - Body

and Accessories).

Follow these procedures if a customer comments that their GM Accessory 2-way transmitter stopped communicating with the vehicle.

About GM Accessory 2-Way Remote Start

The GM Accessory 2-way transmitter has the ability to operate a second vehicle equipped with a 2-way advanced remote start system, but often the

2-way transmitter may only be coded to one vehicle. If the customer presses the left side button twice within one second, the 2-way transmitter will

enter second vehicle mode and will not control the original vehicle until a subsequent double press of the left side button places the transmitter back

in first vehicle mode. Each vehicle mode of the 2-way transmitter should be thought of as an individual transmitter with its own unique code.

Test the Transmitter Battery

Note

This test should be performed prior to releasing the vehicle or transmitter to the customer.

All transmitter batteries should be tested immediately after installation of a 2-way remote start kit or replacement of a transmitter battery using the

following procedure.

1. Press the unlock button on the transmitter eight times consecutively.

2. After the eighth press of the unlock button, observe the battery gauge located in the upper right corner of the LCD display. The gauge should

read full (three bars inside the battery icon).

If after having a new battery installed, the battery goes dead within five months, the transmitter could have high sleep current, causing the battery to

go dead. Replace the transmitter.

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 272

Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every

step, the remaining steps do not need to be performed.

Determine if Transmitter is in Second Vehicle Mode

1. Press and release any of the face buttons on the 2-way transmitter and observe the display on power-up.

2. If the 2-way transmitter is in second vehicle mode, the second vehicle icon will be displayed on the left side of the transmitter display. Is the

2-way transmitter in second vehicle mode?

If Yes, the 2-way transmitter is working properly.

- Press and release the left side button twice within one second. The 2-way transmitter should exit second vehicle mode.

- Press and release the lock button. Press and release the unlock button.

- Confirm that the vehicle responds with the appropriate lock and unlock function.

- If Yes , the 2-way transmitter was in mode B.

- Press and release the left side button twice within one second. The 2-way transmitter should enter second vehicle mode.

- Use the "next available slot" method in the scan tool to program the 2-way transmitter to the 2-way RCDLR. Refer to Remote Control

Door Lock Transmitter Programming in SI.

- Both vehicle modes of the 2-way transmitter should now be coded to the vehicle.

If No:

The 2-way transmitter is not exhibiting the failure mode addressed by this bulletin. Refer to normal diagnostic procedures.

Parts Information

For part numbers, usage and availability of 2-way remote start, refer to the Accessory Parts Catalog or Corporate Bulletin Number 09-00-89-025A.

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Technical Service Bulletin # 05-08-46-009C Date: 120319

OnStar(R) - Language Change Information (U.S. and Canada Only)

INFORMATION

Bulletin No.: 05-08-46-009C

Date: March 19, 2012

Subject: (R)Language Change for OnStar System (U.S. and Canada Only)

Models:

2006-2013 GM Passenger Cars and Light Duty Trucks

Equipped with OnStar(R) (RPO UE1)

Built After and Including VIN Breakpoints Listed Below (2006 MY Only)

Attention:

This bulletin only applies to vehicles equipped with OnStar(R) Generation 6.1 or later with a Station Identification (STID) Number in the following

range: 16,000,000-17,000,000 or 20,000,000-21,999,999 or 23,500,001-26,000,000

Supercede:

This bulletin is being revised to add 2009-2013 model years. Please discard Corporate Bulletin Number 05-08-46-009B (Section 08 - Body and

Accessories).

Built After and Including the Following VIN Breakpoints:

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 68

The Generation (Gen) 6.1 OnStar(R) system found in these vehicles has the capability to change the default English voice recognition to French or

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 69

Spanish.

Changing the language of the OnStar(R) system will change the following features to the language you select:

- Voice recognition command prompts will be played in the language selected.

- The voice recognition system will only recognize commands given in the selected language.

Once completed, this process completely changes all voice recognition and voice commands of the OnStar(R) system. The process will need to be

repeated in its entirety to change to a different language, including English.

The Gen 6.1 version of OnStar(R) does not require the use of the Service Programming System (SPS) to change the voice recognition system.

However, there are three ways to change the language.

Method 1

Method 2

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 70

2010 Cadillac CTS Sedan AWD V6-3.6L Page 2002

瀚慖f the DTC is set, refer to Diagnostic Trouble Code (DTC) List - Vehicle (See: Diagnostic Trouble Code Descriptions/Diagnostic

Trouble Code (DTC) List - Vehicle).

2. Ignition OFF, disconnect the harness connector at the G12 fuel pump.

3. Ignition ON, test for less than 5.0 ohm between the G12 fuel pump low reference circuit terminal 2 and ground.

瀚慖f greater than the specified range, test the G12 fuel pump low reference circuit for a high resistance. If the circuit tests normal, replace

the K27 fuel pump control module.

4. Ignition OFF, install a test lamp between the control circuit terminal 1 and the low reference circuit terminal 2.

5. Ignition ON, command the Fuel Pump Relay ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between

the commanded states.

瀚慖f the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the K27 fuel pump control

module.

瀚慖f the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace

the K27 fuel pump control module.

6. Perform the Fuel System Diagnosis (See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Component

Tests and General Diagnostics/Fuel System Diagnosis) to verify proper fuel pressure.

瀚慖f the fuel pressure is not normal, replace the G12 fuel pump

7. If all circuits test normal, replace the K27 fuel pump control module.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

* Fuel Tank Fuel Pump Module Replacement - Right Side (See: Powertrain Management/Fuel Delivery and Air Induction/Fuel Pump/Service

and Repair/Fuel Tank Fuel Pump Module Replacement - Right Side)

* Control Module References (See: Testing and Inspection/Programming and Relearning)for fuel pump control module replacement, setup,

and programming

P2636

DTC P2636

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions) provides an overview of each diagnostic category.

DTC Descriptor

DTC P2636

- Fuel Pump 2 Flow Insufficient

Circuit Description

The fuel tank on this vehicle is equipped with 2 fuel level sensors, one for each reservoir of the fuel tank. Fuel is transferred from the left side of the

fuel tank to the right side of the fuel tank in order to ensure all of the usable fuel volume is available. The fuel pump supplies a small amount of

pressurized fuel to the siphon jet pump through the fuel feed pipe. The pressurized fuel creates a venturi action inside the siphon jet pump. The

venturi action causes the fuel to be drawn out of the left side of the fuel tank. Fuel is then transferred from the left side of fuel tank to the right side

of fuel tank through the internal fuel transfer tube. This diagnostic tests for too large of a difference in fuel level between the left and right side of

the fuel tank. The DTC sets if the control module determines that the right side fuel level is less than a predetermined amount of the left side fuel

level.

The following table illustrates the difference between fuel level, resistance, and voltage:

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 738

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions) provides an overview of each diagnostic category.

DTC Descriptors

DTC B0173 02

- Upper Left Duct Air Temperature Sensor Circuit Short to Ground

DTC B0173 05

- Upper Left Duct Air Temperature Sensor Circuit High Voltage/Open

DTC B0178 02

- Lower Left Duct Air Temperature Sensor Circuit Short to Ground

DTC B0178 05

- Lower Left Duct Air Temperature Sensor Circuit High Voltage/Open

DTC B0509 02

- Upper Right Duct Air Temperature Sensor Circuit Short to Ground

DTC B0509 05

- Upper Right Duct Air Temperature Sensor Circuit High Voltage/Open

DTC B0514 02

- Lower Right Duct Air Temperature Sensor Circuit Short to Ground

DTC B0514 05

- Lower Right Duct Air Temperature Sensor Circuit High Voltage/Open

DTC B0519 02

- Rear Upper Duct Air Temperature Sensor Circuit Short to Ground

DTC B0519 05

- Rear Upper Duct Air Temperature Sensor Circuit High Voltage/Open

DTC B3583 02

- Rear Lower Duct Air Temperature Sensor Circuit Short to Ground

DTC B3583 05

- Rear Lower Duct Air Temperature Sensor Circuit High Voltage/Open

DTC B3933 02

- Air Conditioning Evaporator Temperature Sensor Circuit Short to Ground

DTC B3933 05

- Air Conditioning Evaporator Temperature Sensor Circuit High Voltage/Open

Circuit/System Description

The air temperature sensors are a 2-wire negative temperature co-efficient thermistor. The vehicle uses the following air temperature sensors:

* Air temperature sensor - left upper

* Air temperature sensor - left lower

* Air temperature sensor - right upper

* Air temperature sensor - right lower

* Air temperature sensor - rear upper (only with CJ4)

* Air temperature sensor - rear lower (only with CJ4)

* A/C evaporator temperature sensor

A signal and low reference circuit enables the sensor to operate. As the air temperature surrounding the sensor increases, the sensor resistance

decreases. The sensor signal voltage decreases as the resistance decreases. The sensor operates within a temperature range between -40 to +85掳C

(-40 to +185掳F). The sensor signal varies between 0-5 V. The HVAC control module converts the signal to a range between 0-255 counts. As the

air temperature increases the count value will decrease. If the HVAC control module detects a malfunctioning sensor, then the control module

software will use a default air temperature value. The default action ensures that the HVAC system can adjust the inside air temperature near the

desired temperature until the condition is corrected.

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1317

Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: Diagnostic Trouble Code Descriptions/Powertrain Diagnostic Trouble Code

(DTC) Type Definitions)

Scan Tool Reference

Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information

Circuit/System Verification

1. Operate the engine for 30 seconds. Observe the DTC information with a scan tool. DTC P0351, P0352, P0353, P0354, P0355, P0356, P2300,

P2301, P2303, P2304, P2306, P2307, P2309, P2310, P2312, P2313, P2315, or P2316 should not set.

2. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the

conditions that you observed from the Freeze Frame/Failure Records data.

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the appropriate T8 ignition coil.

2. Ignition OFF, all vehicle systems OFF, it may take up to 2 minutes for all the systems to power down, test for less than 5 ohm between the

ground circuit terminal A and ground.

瀚慖f greater than the specified range, repair the ground circuit for an open/high resistance.

3. Ignition OFF, test for less than 5 ohm between the low reference circuit terminal B and ground.

瀚慖f greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the ECM.

4. Ignition ON, verify that a test lamp illuminates between ignition voltage circuit terminal D and ground.

瀚慖f the test lamp does not illuminate, test the ignition voltage circuit for a short to ground or an open/high resistance. If the circuit tests

normal and the ignition voltage circuit fuse is open, test all the components connected to the ignition voltage circuit and replace as

necessary.

5. Engine running, observe the Ignition Coil 1-6 Control Circuit Low Voltage Test Status on the scan tool. Test Status should be Ok or Not

Run.

瀚慖f test status is Malfunction test for open or short to ground.

6. Engine running, observe the Ignition Coil 1-6 Control Circuit Open Test Status on the scan tool. Test Status should be Ok or Not Run.

瀚慖f test status is Malfunction test for open circuit.

7. Engine running, observe the Ignition Coil 1-6 Control Circuit High Voltage Test Status on the scan tool. Test Status should be Ok or Not

Run.

瀚慖f test status is Malfunction test for short to voltage.

8. If all circuits test normal, test or replace the appropriate T8 ignition coil.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

* Ignition Coil Replacement - Bank 1 (See: Powertrain Management/Ignition System/Ignition Coil/Service and Repair/Ignition Coil

Replacement - Bank 1)

* Ignition Coil Replacement - Bank 2 (See: Powertrain Management/Ignition System/Ignition Coil/Service and Repair/Ignition Coil

Replacement - Bank 2)

* Control Module References (See: Testing and Inspection/Programming and Relearning) for engine control module replacement, setup, and

programming

P0356

DTC P0351-P0356, P2300, P2301, P2303, P2304, P2306, P2307, P2309, P2310, P2312, P2313, P2315, or P2316 (LAU)

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

2010 Cadillac CTS Sedan AWD V6-3.6L Page 1847

* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/Circuit Testing/Circuit Testing)

* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/Connector Repairs/Connector Repairs)

* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/Circuit

Testing/Testing for Intermittent Conditions and Poor Connections)

* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/Wiring Repairs/Wiring Repairs)

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: Diagnostic Trouble Code Descriptions/Powertrain Diagnostic Trouble Code

(DTC) Type Definitions)

Scan Tool Reference

Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information

Special Tools

* EL 34730-405 - Injector Test Lamp

* For equivalent regional tools, refer to Special Tools (See: Powertrain Management/Computers and Control Systems/Tools and Equipment).

Circuit/System Verification

1. Ignition ON, observe the DTC information with a scan tool. Verify that DTC P0121, P0122, P0123, P0221, P0222, or P0223 is not set.

瀚慖f a DTC is set, refer to DTC P0121-P0123 or P0221-P0223 (Without LF1) (See: P Code Charts/P0121) for further diagnosis.

2. Observe the scan tool Throttle Position Sensor voltage parameters. Verify that Throttle Position Sensor 1 voltage is between 3.24-3.54 V, and

Throttle Position Sensor 2 voltage is between 1.36-1.86 V.

瀚慖f either Throttle Position Sensor voltage is not within the specified range refer to DTC P0121-P0123 or P0221-P0223 (Without LF1) (

See: P Code Charts/P0121) for further diagnosis.

3. Rapidly depress the accelerator pedal from the rest position to the wide open throttle position (WOT) and release the pedal. Repeat the

procedure several times. DTCs P0638, P2100, P2101, P2102, P2103, or P2119 should not set.

瀚慖f a DTC P0121, P0122, P0123, P0221, P0222, or P0223 set while performing this procedure refer to DTC P0121-P0123 or

P0221-P0223 (Without LF1) (See: P Code Charts/P0121) for further diagnosis.

4. Slowly depress the accelerator pedal to WOT and then slowly return the pedal to closed throttle. Repeat the procedure several times. DTC

P0638, P2100, P2101, P2102, P2103, or P2119 should not set.

瀚慖f a DTC P0121, P0122, P0123, P0221, P0222, or P0223 set while performing this procedure, refer to DTC P0121-P0123 or

P0221-P0223 (Without LF1) (See: P Code Charts/P0121) for further diagnosis.

5. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the

conditions that you observed from the Freeze Frame/Failure Records data.

Circuit/System Testing

Warning

Turn OFF the ignition before inserting fingers into the throttle bore. Unexpected movement of the throttle blade could cause personal injury.

1. Ignition OFF, verify the following conditions do not exist with the throttle body assembly:

* A throttle blade that is not in the rest position

* A throttle valve that is binding open or closed

* A throttle valve that opens or closes without spring pressure

瀚慖f a condition is found, replace the throttle body assembly.

Note: Disconnecting the throttle body harness connector causes additional DTCs to set.

2. Ignition OFF, disconnect the harness connector of the throttle body.

3. Ignition ON, test for 4.0-4.2 V between the TAC motor control 1 circuit terminal B and ground.

瀚慖f voltage is greater than the specified range, test each of the motor control circuits for a short to voltage. If the circuits tests normal,

replace the engine control module.

瀚慖f voltage is less than the specified range, test the motor control 1 circuit for a short to ground or an open/high resistance. If the circuit

tests normal, replace the engine control module.

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 268

瀚慖f all the passenger, left rear and right rear doors will not unlock and open with a single pull of the exterior door handle, refer to

Passenger and Rear Door Release Command Inoperative.

瀚慖f a door will not unlock and open with a single pull of the door handle, refer to Passenger or Rear Door Latch Malfunction.

Circuit/System Testing

Driver Door Latch Malfunction

1. Ignition OFF, disconnect the X2 harness connector at the K84 keyless entry control module.

2. Test for less than 10 ohm between the ground circuit terminal 6 and ground.

瀚慖f greater than the specified range, test the ground circuit for an open/high resistance.

3. Ignition OFF, connect the X2 harness connector and disconnect the X4 harness connector at the K84 keyless entry control module.

4. Test for infinite resistance between the control circuit terminal 3 and ground.

瀚慖f less than the specified value, test the control circuit for a short to ground. If the circuit tests normal, replace the K9 BCM.

5. Ignition OFF, connect the X4 harness connector at the K84 keyless entry control module.

6. Disconnect the harness connector at the A23D door latch assembly - driver.

7. Connect a test lamp between the control circuit terminal 5 and control circuit terminal 10.

8. Pull and release the exterior driver door handle, the test lamp should briefly illuminate while the exterior door handle is being pulled.

瀚慖f the test lamp is always OFF, test either control circuit for a short to ground or an open/high resistance. If the circuits test normal,

replace the K84 keyless entry control module.

瀚慖f the test lamp is always ON, test either control circuit for a short to voltage. If the circuits test normal, replace the K84 keyless entry

control module.

9. If all circuits test normal, test or replace the A23D door latch assembly - driver.

Passenger and Rear Door Release Command Inoperative

1. Ignition OFF, disconnect the X4 harness connector at the K84 keyless entry control module.

2. Test for infinite resistance between the control circuit terminal 14 and ground.

瀚慖f less than the specified value, test the control circuit for a short to ground. If the circuit tests normal, replace the K9 BCM.

3. If all circuits test normal, replace the K84 keyless entry control module.

Passenger or Rear Door Latch Malfunction

1. Ignition OFF, disconnect the harness connector at the appropriate A23 door latch assembly.

2. Connect a test lamp between the control circuit terminal 5 and control circuit terminal 10.

3. Pull and release the appropriate exterior door handle, the test lamp should briefly illuminate while the exterior door handle is being pulled.

瀚慖f the test lamp is always OFF, test either control circuit for a short to ground or an open/high resistance. If the circuits test normal,

replace the K84 keyless entry control module.

瀚慖f the test lamp is always ON, test either control circuit for a short to voltage. If the circuits test normal, replace the K84 keyless entry

control module.

4. If all circuits test normal, test or replace the A23 door latch assembly.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

* Front Side Door Lock Replacement (See: Body and Frame/Locks/Door Locks/Service and Repair/Front Side Door Lock Replacement)

* Rear Side Door Lock Replacement (See: Body and Frame/Locks/Door Locks/Service and Repair/Rear Side Door Lock Replacement)

* Control Module References (See: Testing and Inspection/Programming and Relearning) for BCM or keyless entry control module

replacement, setup and programming

B251B

DTC B251A-B251F

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1675

IMS ground and the ECM PNP Switch parameter displays Park/Neutral when terminal F is connected to ground.

* Switch Signal A terminal E

* Switch Signal B terminal D

* Switch Signal C terminal C

* Switch Signal P terminal B

* PNP Switch Signal terminal F

瀚慖f not the specified value, replace the control solenoid valve assembly.

12. If all circuits test normal, replace the IMS.

Repair Instructions

Important:

* Perform the Service Fast Learn Adapts (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Testing and

Inspection/Programming and Relearning) following all transmission related repairs.

* Before replacing the TCM, perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection (See:

Transmission and Drivetrain/Automatic Transmission/Transaxle/Testing and Inspection/Component Tests and General

Diagnostics/6T70/6T75 - Automatic Transmission/Control Solenoid Valve and Transmission Control Module Assembly Inspection).

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

* Control Module References (See: Testing and Inspection/Programming and Relearning) for ECM or control solenoid valve assembly

replacement, setup, and programming

* Range Selector Lever Cable Adjustment (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Shift Linkage/Shift

Cable/Adjustments)

* Control Valve Body Cover Replacement (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Valve Body/Service and

Repair/6T70/6T75 - Automatic Transmission/Control Valve Body Cover Replacement)

* Manual Shift Detent Lever with Shaft Position Switch Assembly Replacement (See: Powertrain Management/Computers and Control

Systems/Sensors and Switches - Computers and Control Systems/Transmission Position Sensor/Switch/Service and Repair)

Antilock Brake System

DTC P0856

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System

Check - Vehicle) prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an

overview of the diagnostic approach.

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions) provides an overview of each diagnostic category.

DTC Descriptor

DTC P0856 00

- Traction Control Torque Request Circuit Malfunction

Circuit/System Description

When traction control is active, the electronic brake control module (EBCM) sends a serial data message to the engine control module (ECM)

requesting torque reduction. When certain ECM DTCs are set, the ECM will not be able to perform the torque reduction for traction control. A

serial data message is sent to the EBCM indicating that traction control is not allowed.

Conditions for Running the DTC

Engine running

Conditions for Setting the DTC

The ECM detects a fault that prevents it from performing a traction control function and sends a serial data message to the EBCM indicating that

torque reduction is not allowed.

Action Taken When the DTC Sets

* The EBCM disables the traction control and stability control for the duration of the ignition cycle.

2010 Cadillac CTS Sedan AWD V6-3.6L Page 1246

DTC P0265

- Cylinder 2 Injector Control Circuit High Voltage

DTC P0267

- Cylinder 3 Injector Control Circuit Low Voltage

DTC P0268

- Cylinder 3 Injector Control Circuit High Voltage

DTC P0270

- Cylinder 4 Injector Control Circuit Low Voltage

DTC P0271

- Cylinder 4 Injector Control Circuit High Voltage

DTC P0273

- Cylinder 5 Injector Control Circuit Low Voltage

DTC P0274

- Cylinder 5 Injector Control Circuit High Voltage

DTC P0276

- Cylinder 6 Injector Control Circuit Low Voltage

DTC P0277

- Cylinder 6 Injector Control Circuit High Voltage

DTC P2146

- Cylinder 1 Injector High Control Circuit

DTC P2149

- Cylinder 2 Injector High Control Circuit

DTC P2152

- Cylinder 3 Injector High Control Circuit

DTC P2155

- Cylinder 4 Injector High Control Circuit

DTC P216A

- Cylinder 5 Injector High Control Circuit

DTC P216D

- Cylinder 6 Injector High Control Circuit

Diagnostic Fault Information

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 106

- SDM wiring harness connector

- Roof rail air bag wiring harness connector

- Seat side air bag wiring harness connector

- Passenger instrument panel air bag wiring harness connector

- Seat belt retractor pretensioner wiring harness connector

* The connector and connector position assurance (CPA) may seat independent of each other. Both the connector and CPA should seat with an

audible and/or tactile click. The CPA isolates the shorting-bars within the connector allowing the deployment circuit to operate properly.

* If the condition is intermittent or cannot be duplicated, disconnect the connectors and add Nyogel lubricant 760G. This procedure will correct

the high resistance condition due to terminal fretting corrosion.

Observe the scan tool Deployment Loop Resistance parameters while moving the harness near each connector listed below. The reading should stay

consistently between 1.7 and 4.2 ohm without any drop outs or spikes.

* F105 Passenger instrument panel air bag, and Roof rail air bag

* F106 Seat side air bag

* F112 Seat belt retractor pretensioner

* Any inline harness

* K36 SDM

If the reading is erratic while moving the harness, perform the following:

* Inspect each connector terminal for damage or corrosion and repair as necessary.

* Apply Nyogel lubricant 760G to each connector terminal.

* Insure each connector and CPA is correctly seated.

Circuit/System Testing

DTC B0014-B0018 or B0021-B0045

1. Ignition OFF, disconnect the harness connector at the appropriate F105, F106 air bag or F112 seat belt retractor pretensioner.

2. Ignition OFF, disconnect the scan tool, wait 120 seconds, test for greater than 25 ohm between the control circuit terminals listed below:

* F105 Left roof rail airbag terminal 1 and 2

* F105 Right roof rail airbag terminal 1 and 2

* F106 Driver seat side airbag terminal 1 and 2

* F106 Passenger seat side airbag terminal 1 and 2

* F112 Driver seat belt retractor pretensioner terminal 1 and 2

* F112 Passenger seat belt retractor pretensioner terminal 1 and 2

瀚慖f less than the specified range, test for a short between the control circuits, check each connector and CPA to ensure that the shorting

bars are lifted. If the circuits and shorting bars tests normal, replace the K36 SDM.

3. Ignition ON, test for less than 11 V between the control circuit terminals listed below and ground:

* F105 roof rail air bag or F106 seat side air bag control circuit terminal 1

* F105 roof rail air bag or F106 seat side air bag control circuit terminal 2

* F112 seat belt retractor pretensioner control circuit terminal 1

* F112 seat belt retractor pretensioner control circuit terminal 2

瀚慖f greater than the specified range, test the control circuit for a short to voltage. If the circuit tests normal, replace the K36 SDM.

4. Ignition OFF, test for greater than 25 ohm between the control circuit terminals listed below and ground:

* F105 roof rail air bag or F106 seat side air bag control circuit terminal 1

* F105 roof rail air bag or F106 seat side air bag control circuit terminal 2

* F112 seat belt retractor pretensioner control circuit terminal 1

* F112 seat belt retractor pretensioner control circuit terminal 2

瀚慖f less than the specified range, test the control circuit for a short to ground. If the circuit tests normal, replace the K36 SDM.

5. Install a 3 A fused jumper wire between the control circuit terminals listed below:

* F105 Left roof rail air bag terminal 1 and 2

* F105 Right roof rail air bag terminal 1 and 2

* F106 Driver seat side air bag terminal 1 and 2

* F106 Passenger seat side air bag terminal 1 and 2

* F112 Driver seat belt retractor pretensioner terminal 1 and 2

* F112 Passenger seat belt retractor pretensioner terminal 1 and 2

6. Verify the scan tool Deployment Loop Resistance parameter is less than 2 ohm.

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1298

3. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the

conditions that you observed from the Freeze Frame/Failure Records data.

Circuit/System Testing

1. Ignition OFF, remove the fuse that supplies B+ to terminal 56-X2 of the ECM.

2. Disconnect the harness connector at the appropriate camshaft position sensor.

Note: The control module or the sensor may be damaged if the circuit is shorted to B+ voltage.

3. Test for 5 ohm or less between the low reference circuit terminal 1 and ground.

瀚慖f greater than the specified range, test the low reference circuit for an open/high resistance or for a short to voltage. If the

circuit/connections test normal, replace the ECM.

4. Install the fuse that supplies B+ to terminal 56-X2 of the ECM.

5. Ignition ON, test for greater than 4.8 V between the 5-volt reference circuit terminal 3 and ground.

瀚慖f less than the specified value, test the 5-volt reference circuit for an open/high resistance. If the circuits/connections test normal, replace

the ECM.

6. Test for 4.8-5.2 V between the signal circuit terminal 2 and ground.

瀚慖f the voltage is greater than specified range, test for a short to voltage in the signal circuit. If circuit/connections test normal, replace the

ECM.

瀚慖f the voltage is less than the specified range, test for a short to ground or an open/high resistance in the signal circuit. If

circuit/connections test normal, replace the ECM.

7. If all circuits/connections test normal, replace the camshaft position sensor.