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2010 Cadillac Truck SRX FWD V6-3.0L Page 1100

Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)

* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/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

Circuit/System Verification

1. Observe the DTC information with a scan tool. DTC P0627, P0628, P0629, P069E, or U0109 should not set.

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

Code (DTC) List - Vehicle).

2. Attempt to start and idle the engine.

3. Observe the DTC information with a scan tool. DTCs P0089, P00C6, P228C, and P228D should not set.

4. Engine idling, observe the Fuel Rail Pressure Sensor parameter with a scan tool. The pressure should be approximately 1.9-2.1 Mpa (279-305

psi).

5. Command an increase and decrease in Fuel Pressure with a scan tool. Observe the scan tool Fuel Rail Pressure Sensor parameter. The Fuel

Rail Pressure Sensor parameter should increase or decrease with each commanded state.

6. 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

Note: Circuit/System Verification must be performed first or misdiagnosis may result.

1. Ignition ON, observe the scan tool Fuel Pump Control Module Fuel Pressure Sensor parameter. Command an increase in Fuel Pressure with a

scan tool. Verify the Fuel Pressure Sensor parameter increases to greater than 414 kPa (60 psi) as commanded.

瀚慖f less than the specified range, refer to Fuel System Diagnosis (LF1 China) (See: Powertrain Management/Fuel Delivery and Air

Induction/Fuel Pump/Testing and Inspection/Fuel System Diagnosis (China))Fuel System Diagnosis (LF1 Except China) (See:

Powertrain Management/Fuel Delivery and Air Induction/Fuel Pump/Testing and Inspection/Fuel System Diagnosis (Except China))Fuel

System Diagnosis (LAU China) (See: Powertrain Management/Fuel Delivery and Air Induction/Fuel Pump/Testing and Inspection/Fuel

System Diagnosis (China))Fuel System Diagnosis (LAU Except China) (See: Powertrain Management/Fuel Delivery and Air

Induction/Fuel Pump/Testing and Inspection/Fuel System Diagnosis (Except China)).

Note: As little as 2 ohm on either circuit of the high pressure fuel pump actuator will cause these DTCs to set. Test the circuits of the high

pressure fuel pump actuator for a high resistance if you suspect a condition.

2. Remove the G18 high pressure fuel pump and visually inspect the lobes on the camshaft for unusual wear.

瀚慖f the lobes appear normal, replace the G18 high pressure fuel pump.

瀚慖f the lobes are worn, replace the camshaft.

Component Testing

Static Test

1. Ignition OFF, disconnect the harness connector at the G18 high pressure fuel pump.

Note: The DMM and test leads must be calibrated to 0 ohm in order to prevent misdiagnosis.

2. Test for 10 ohm plus/minus 1 ohm at 25掳C (77掳F) between the low control circuit terminal 1 and the high control circuit terminal 2.

瀚慖f not within the specified range, replace the G18 high pressure fuel pump.

3. Test for infinite resistance between each terminal and the G18 high pressure fuel pump housing.

瀚慖f not the specified value, replace the G18 high pressure fuel pump.

Repair Instructions

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

* Camshaft Replacement - Right Side (See: Engine, Cooling and Exhaust/Engine/Camshaft, Lifters and Push Rods/Camshaft/Service and

2010 Cadillac Truck SRX FWD V6-3.0L Technical Service Bulletin # 10-06-01-006 Date: 100726

Engine - Drive Belt Noise Inspect Pulley

TECHNICAL

Bulletin No.: 10-06-01-006

Date: July 26, 2010

Subject: Intermittent or Continuous Drive Belt Noise (Inspect for Pulley Damage, Misalignment and/or Replace Drive Belt)

Models:

2010 Buick LaCrosse

2010 Cadillac SRX

2010 Chevrolet Equinox

2010 GMC Terrain

Equipped with 3.0L (RPO LF1) or 3.6L (RPO LLT) V6 Engine

Built Prior to February 27, 2010

Condition

Some customers may comment on an intermittent or continuous drive belt noise.

Cause

2010 Cadillac Truck SRX FWD V6-3.0L Page 237

This condition may be caused by any of the following:

- One or more of the accessory drive pulleys may be misaligned, bent or damaged.

- The power steering (PS) pump pulley may be misaligned due to improper mounting on the PS pump.

- The drive belt may need to be replaced.

Correction

1. Verify the intermittent or continuous drive belt noise condition exists.

瀚慖f the condition exists, proceed to Step 2.

瀚慖f the condition does not exist, then this bulletin does not apply.

2. Perform a visual inspection for damage to any accessory drive pulley or to the drive belt. Refer to Drive Belt Chirping, Squeal and Whine

Diagnosis in SI.

瀚慖f the diagnosis reveals a condition, then repair as needed.

瀚慖f the diagnosis does not reveal a condition, proceed to Step 3.

3. Remove the drive belt. Refer to Drive Belt Replacement in SI.

Important

To properly perform Step 4, you MUST refer to and follow the referenced procedure.

4. Inspect the PS pump pulley and determine if it is flush with the PS pump shaft on the FRONT side. Refer to Corporate Bulletin Number

08-06-01-008A, Diagnosing Accessory Drive Belt/Serpentine Belt Noise and Use of Laser Alignment Tool in SI.

瀚慖f the inspection reveals that the PS pump pulley is properly aligned, then replace the drive belt. Refer to Drive Belt Replacement in SI.

Parts Information

Warranty Information

For vehicles repaired under warranty, use the table.

2010 Cadillac Truck SRX FWD V6-3.0L Page 1918

DTC P0461

- Fuel Level Sensor 1 Performance

DTC P0462

- Fuel Level Sensor 1 Circuit Low Voltage

DTC P0463

- Fuel Level Sensor 1 Circuit High Voltage

DTC P0464

- Fuel Level Sensor Circuit Intermittent

DTC P2066

- Fuel Level Sensor 2 Performance

DTC P2067

- Fuel Level Sensor 2 Circuit Low Voltage

DTC P2068

- Fuel Level Sensor 2 Circuit High Voltage

Diagnostic Fault Information

Circuit/System Description

The primary fuel level sensor and the secondary fuel level sensor change resistance based on fuel level. The engine control module (ECM) monitors

the signal circuits of the primary fuel level sensor and the secondary fuel level sensor in order to determine the fuel level. When the fuel tank is full,

the resistances of both fuel level sensors are low and the ECM senses a low signal voltage on both the signal circuits of the primary fuel level

sensor and the secondary fuel level sensor. When the fuel tank is empty, the resistances of the fuel level sensors are high and the ECM senses a high

signal voltage. The ECM uses the signal circuits of the primary fuel level sensor and the secondary fuel level sensor in order to calculate the

percentage of remaining fuel in the tank. The ECM sends the fuel level percentage via High Speed CAN-Bus to the body control module (BCM).

The BCM then sends the fuel level percentage via Low Speed CAN-Bus to the instrument cluster in order to control the fuel gauge.

Conditions for Running the DTC

* The engine is running

* The system voltage is between 11-16 V

Conditions for Setting the DTC

P0461 or P2066

* The ECM detects a difference between the fuel consumed by the engine and change of the fuel level signal of less than 1 L (0.26 gal) over a

range of 30 L (7.92 gal) or 45.6% of the primary fuel tank.

* The above condition is present for about 300 seconds.

P0462 or P2067

* The signal voltage is less than 0.25 V.

* The above conditions must be met for 5 seconds.

P0463 or P2068

* The signal voltage is greater than 4.7 V.

* The above conditions must be met for 5 seconds.

P0464

* The fuel level change is greater than 10%.

* The above conditions must be met for 30 seconds.

* DTC P0464 runs and fails 2 out of 3 test cycles.

Action Taken When the DTC Sets

* P0461, P0462, P0463, P0464, P2066, P2067 and P2068 are Type B DTCs

Friday, March 18, 2022

2010 Cadillac Truck SRX FWD V6-3.0L Page 862

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

Circuit/System Testing

1. Verify that no DTCs are present in the ECM.

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

Trouble Code (DTC) List - Vehicle) to diagnose that DTC prior to this diagnostic.

2. Replace the K19 suspension control module and verify the DTC does not reset.

瀚慖f the DTC resets replace the K20 engine control module (ECM).

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 control module replacement, setup and programming

C0750

DTC C0750, C0755, C0760, or C0765

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 C0750 03

- Left Front Tire Pressure Sensor Low Voltage

DTC C0750 29

- Left Front Tire Pressure Sensor Too Few Pulses

DTC C0750 39

- Left Front Tire Pressure Sensor Internal Malfunction

DTC C0755 03

- Right Front Tire Pressure Sensor Low Voltage

DTC C0755 29

- Right Front Tire Pressure Sensor Too Few Pulses

DTC C0755 39

- Right Front Tire Pressure Sensor Internal Malfunction

DTC C0760 03

- Left Rear Tire Pressure Sensor Low Voltage

DTC C0760 29

- Left Rear Tire Pressure Sensor Too Few Pulses

DTC C0760 39

- Left Rear Tire Pressure Sensor Internal Malfunction

DTC C0765 03

- Right Rear Tire Pressure Sensor Low Voltage

DTC C0765 29

- Right Rear Tire Pressure Sensor Too Few Pulses

DTC C0765 39

- Right Rear Tire Pressure Sensor Internal Malfunction

2010 Cadillac Truck SRX FWD V6-3.0L Page 2123

* TCM communication is normal.

* The automatic transmission fluid temperature is more than 20掳C (68掳F).

* SLB1 current is more than 0.85 A.

* SLB1 current is not changed.

P2729

* The ignition voltage is 10.2-15.5 V.

* The engine speed is greater than 400 RPM for 2 s.

* The transmission is not in emergency mode.

* Driving in D range.

* TCM communication is normal.

* DTC P2730 is not set.

P2730

* The ignition voltage is 10.2-15.5 V.

* The engine speed is greater than 400 RPM for 2 s.

* The transmission is not in emergency mode.

* Driving in D range.

* TCM communication is normal.

* DTC P2729 is not set.

Conditions for Setting the DTC

P2725

Deviation between commanded current and feedback current.

P2728

The TCM detects the error current more than 80 mA for 2.75 ms.

P2729

The TCM detects at least 5 times less than 23 mA current consumption of the SLB1 control circuit for 100 ms.

P2730

The TCM detects at least 5 times more than 1.333 A current consumption of the SLB1 control circuit for 100 ms.

Action Taken When the DTC Sets

P2725, P2728

* DTC P2725 and P2728 are Type B DTC.

* The TCM turns OFF all solenoids.

* The TCM allows the vehicle to operate only in the second gear and "R" range after a stop.

P2729, P2730

* DTCs P2729 and P2730 are Type B DTCs.

* No self learning function.

* The TCM turns OFF all solenoids.

* The TCM allows the vehicle to operate only in the second gear and "R" range after a stop.

Conditions for Clearing the DTC

P2725, P2728

* DTC P2725 and P2728 are Type B DTC.

* The TCM detects the error current less than 50 mA for 2.75 ms.

P2729, P2730

* DTCs P2729 and P2730 are Type B DTCs.

* The current consumption of the SLB1 control circuit is 0.1-1.1 A for 500 ms.

Diagnostic Aids

When attempting to set solenoid electrical DTCs, ensure the TCM is warmed up and the transmission is operated in 2nd gear long enough to ensure

a 3掳C (5掳F) increase in TCM substrate temperature. This will place the TCM in the optimal condition to test solenoid electrical DTCs.

2010 Cadillac Truck SRX FWD V6-3.0L Page 2114

- Clutch Pressure Control (PC) Solenoid 5 Control Circuit Low Voltage

DTC P2730

- Clutch Pressure Control (PC) Solenoid 5 Control Circuit High Voltage

Diagnostic Fault Information

Circuit/System Description

The clutch pressure control (PC) solenoid 5 is part of the control solenoid valve assembly which has no serviceable components. The normally low

PC solenoid 5 regulates and directs oil pressure to the 1-2-3-4 clutch regulator valve and 1-2-3-4 clutch boost valve. Increasing PC solenoid 5

pressure increases pressure to the 1-2-3-4 clutch. The TCM varies the current to the PC solenoid 5 through a low side driver. Increasing the current

to PC solenoid 5 increases oil pressure by closing OFF the solenoid exhaust port. Decreasing the current to PC solenoid 5 decreases oil pressure by

opening the exhaust port. PC solenoid 5 power is supplied by the TCM through a high side driver (HSD). The HSD protects the circuit and

components from excessive current flow. If excessive current flow is detected, the HSD will turn OFF. When the fault is corrected, the HSD will

reset.

Conditions for Running the DTC

P2728

* DTC P2728 has not set this ignition cycle.

* The engine speed is 400 RPM or greater for 5 seconds.

* The ignition voltage is 8.6 volts or greater.

P2729

* DTC P2729 has not set this ignition cycle.

* The engine speed is 400 RPM or greater for 5 seconds.

* The ignition voltage is 8.6 volts or greater.

P2730

* DTC P2730 has not set this ignition cycle.

* The engine speed is 400 RPM or greater for 5 seconds.

* The ignition voltage is 8.6 volts or greater.

Conditions for Setting the DTC

P2728

The TCM detects an internal electrical performance malfunction of the clutch PC solenoid 5 control circuit where the measured clutch PC solenoid

5 current does not equal the commanded clutch PC solenoid 5 current for 5 seconds.

P2729

The TCM detects a short to ground on the clutch PC solenoid 5 control circuit for 1 second.

P2730

The TCM detects an open or short to voltage on the clutch PC solenoid 5 control circuit for 1 second.

Action Taken When the DTC Sets

P2728

* DTC P2728 is a Type C DTC.

* The TCM freezes transmission adaptive functions on the 1-2-3-4 clutch.

P2729

* DTC P2729 is a Type A DTC.

* The TCM commands maximum line pressure.

* The TCM freezes transmission adaptive functions.

* The TCM inhibits Tap Up/Down function.

* The TCM inhibits manual shifting of forward gears.

* The TCM limits then the transmission to reverse, 1st and 3rd gear.

P2730

* DTC P2730 is a Type A DTC.

* The TCM inhibits the TCC.