2010 Cadillac Truck SRX FWD V6-3.0L Page 1291

2010 Cadillac Truck SRX FWD V6-3.0L Page 1291

DTC Descriptors

DTC P2147

- Cylinder 1 Injector High Control Circuit Low Voltage

DTC P2148

- Cylinder 1 Injector High Control Circuit High Voltage

DTC P2150

- Cylinder 2 Injector High Control Circuit Low Voltage

DTC P2151

- Cylinder 2 Injector High Control Circuit High Voltage

DTC P2153

- Cylinder 3 Injector High Control Circuit Low Voltage

DTC P2154

- Cylinder 3 Injector High Control Circuit High Voltage

DTC P2156

- Cylinder 4 Injector High Control Circuit Low Voltage

DTC P2157

- Cylinder 4 Injector High Control Circuit High Voltage

DTC P216B

- Cylinder 5 Injector High Control Circuit Low Voltage

DTC P216C

- Cylinder 5 Injector High Control Circuit High Voltage

DTC P216E

- Cylinder 6 Injector High Control Circuit Low Voltage

DTC P216F

- Cylinder 6 Injector High Control Circuit High Voltage

Diagnostic Fault Information

Circuit/System Description

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DTC Descriptors

DTC P0601

- Control Module Read Only Memory Performance

DTC P0602

- Control Module Not Programmed

DTC P0603

- Control Module Long Term Memory Reset

DTC P0604

- Control Module Random Access Memory Performance

DTC P0606

- Control Module Processor Performance

DTC P062B

- Control Module Fuel Injector Control Performance

DTC P062F

- Control Module Long Term Memory Performance

DTC P0630

- VIN Not Programmed or Mismatched - Engine Control Module (ECM)

DTC P16F3

- Control Module Redundant Memory Performance

DTC P2610

- Control Module Ignition Off Timer Performance

Circuit/System Description

This diagnostic applies to internal microprocessor integrity conditions within the engine control module (ECM). This diagnostic also addresses if

the ECM is not programmed, or is programmed incorrectly.

Conditions for Running the DTC

P0601, P062B, P0630, P16F3

These DTCs run continuously when the ignition is ON.

P0602, P0603, P062F

These DTCs run at power up.

P0604

DTC P0604 runs continuously when the ignition is ON. First memory scan may take up to 30 s.

P0606

* System voltage is greater than 6 V.

* Reduced engine power is not active.

* DTC P0606 runs continuously when the above conditions are met.

P2610

* The intake air temperature is between -40 to +80掳C (-40 to +176掳F).

* DTCs P0111, P0112, P0113 are not set.

* DTC P2610 runs on ECM power down.

Conditions for Setting the DTC

The ECM detects an internal failure or incomplete or incorrect programming.

Action Taken When the DTC Sets

* DTCs P0601, P0602, P0603, P0604, P0606, P062B, P062F, P0630 and P16F3 are Type A DTCs.

* DTC P2610 is a Type B DTC.

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DTC Descriptors

DTC P1248

- Cylinder 1 Injector High Control Circuit Shorted to Control Circuit

DTC P1249

- Cylinder 2 Injector High Control Circuit Shorted to Control Circuit

DTC P124A

- Cylinder 3 Injector High Control Circuit Shorted to Control Circuit

DTC P124B

- Cylinder 4 Injector High Control Circuit Shorted to Control Circuit

DTC P124C

- Cylinder 5 Injector High Control Circuit Shorted to Control Circuit

DTC P124D

- Cylinder 6 Injector High Control Circuit Shorted to Control Circuit

Diagnostic Fault Information

Circuit/System Description

The engine control module (ECM) supplies voltage to each fuel injector on the injector high voltage supply circuits. The ECM energizes each fuel

injector by grounding the high voltage control circuit of the fuel injector. The ECM monitors the status of the injector high voltage supply circuits

and the fuel injector high voltage control circuits. When a fuel injector circuit condition is detected by the ECM, the affected fuel injector(s) is

disabled.

Conditions for Running the DTC

* The engine is running.

* The ignition voltage is between 11-18 V.

* The DTCs run continuously when the above conditions are met.

Conditions for Setting the DTC

P1248, P1249, P124A, P124B, P124C, or P124D

The ECM detects the injector high voltage supply circuit is shorted to the injector high voltage control circuit for greater than 2 s.

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DTC Descriptors

DTC P2716

- Pressure Control Solenoid Valve 3 System Performance

DTC P2719

- Pressure Control Solenoid Valve 3 System Performance

DTC P2720

- Pressure Control Solenoid Valve 3 Control Circuit Low Voltage

DTC P2721

- Pressure Control Solenoid Valve 3 Control Circuit High Voltage

Diagnostic Fault Information

Typical Scan Tool Data

Circuit/System Description

The shift control solenoid (SLC3) is installed on the front valve body. The solenoid linearly control hydraulic pressure in response to signals output

from the transmission control module (TCM). Through this, the SLC3 controls operating hydraulic pressure to the clutch 3 for smooth shifting.

According to each shift control solenoid assembly, the transmission shifts from 1st gear into 6th gear and vice versa. As a fail-safe function, if any

shift control solenoid assembly abnormality occurs, the TCM will disable the current to the solenoids.

Conditions for Running the DTC

P2716

* The ignition voltage is between 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.

* DTCs P2720 and P2721 are not set.

P2719

* The ignition voltage is between 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.

* The Automatic Transmission Fluid Temperature is more than 20掳C (68掳F).

* SLC3 current is more than 0.85 A.

* SLC3 current is not changed.

P2720

* The ignition voltage is between 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 P2721 is not set.

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DTC Descriptors

DTC P0976

- Shift Solenoid (SS) 2 Control Circuit Low Voltage

DTC P0977

- Shift Solenoid (SS) 2 Control Circuit High Voltage

Diagnostic Fault Information

Circuit/System Description

The shift solenoid (SS) 2 is part of the control solenoid valve assembly which has no serviceable components. SS 2 is a normally closed (NC)

ON/OFF solenoid and is controlled by the TCM through a low side driver. When the SS 2 is energized (ON), SS 2 fluid pressure is directed to the

clutch select valve 3, which allows the valve to overcome the spring pressure and move to the applied position. Power to the SS 2 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

P0976

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

* The ignition voltage is 8.6 volts or greater.

* DTC P0976 has not set this ignition cycle.

P0977

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

* The ignition voltage is 8.6 volts or greater.

* DTC P0977 has not set this ignition cycle.

Conditions for Setting the DTC

P0976

The TCM detects a short to ground on the SS 2 control circuit for 2 seconds.

P0977

The TCM detects an open or short to power on the SS 2 control circuit for 2 seconds.

Action Taken When the DTC Sets

P0976

* DTC P0976 is a Type B DTC.

* The TCM freezes transmission adaptive functions.

* The TCM commands maximum line pressure.

P0977

* DTC P0977 is a Type A DTC.

* The TCM limits the transmission to reverse and 5th gear.

* The TCM inhibits the torque converter clutch (TCC).

* The TCM commands maximum line pressure.

* The TCM freezes transmission adaptive functions.

* The TCM turns the high side driver OFF.

* The TCM inhibits Tap Up/Down function.

* The TCM inhibits manual shifting of forward gears.

Conditions for Clearing the DIC/DTC

* DTC P0976 is a Type B DTC.

* DTC P0977 is a Type A DTC.

Reference Information

Connector End View Reference

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DTC Descriptors

DTC B1580

- Mirror Horizontal Position Sensor Circuit

DTC B1590

- Mirror Vertical Position Sensor Circuit

Diagnostic Fault Information

Circuit/System Description

The driver door module (DDM) and passenger door module (PDM) determine the position of the outside rearview mirrors based on inputs from

two mirror position sensors, one for vertical position, the other for horizontal position. 5 V is applied to each sensor through a shared 5 V reference

circuit and a shared low reference circuit supplies ground. Each sensor has an individual signal circuit which is referenced from ground and

provides position voltage to the DDM/PDM.

Conditions for Running the DTC

Battery voltage must be between 9-16 V.

Conditions for Setting the DTC

B1580

An improper voltage level is seen on the horizontal position sensor signal circuit.

B1590

An improper voltage level is seen the vertical position sensor signal circuit.

Action Taken When the DTC Sets

Memory mirror recall functions are suspended as long as the fault is present.

Conditions for Clearing the DTC

* A current DTC will clear when the fault is no longer present.

* A history DTC will clear after 40 malfunction-free ignition cycles.

Reference Information

Schematic Reference

Outside Rearview Mirror Schematics (See: Body and Frame/Mirrors/Diagrams/Electrical Diagrams/Outside Rearview Mirror Schematics)

Connector End View Reference

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

Description and Operation

Outside Mirror Description and Operation (See: Body and Frame/Mirrors/Description and Operation/Outside Mirror 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)

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DTC Descriptors

DTC C0242 00

- ECM Indicated TCS Malfunction

DTC C0242 71

- ECM Indicated TCS Malfunction, Invalid Serial Data

DTC C0242 75

- ECM Indicated TCS Malfunction, Signal Above Allowable Range

Circuit/System Description

The electronic brake control module (EBCM) and the engine control module (ECM) simultaneously control the traction control. The EBCM sends

a serial data message to the 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

* Ignition ON.

* Ignition voltage is greater than 10 volts.

Conditions for Setting the DTC

The ECM diagnoses a condition preventing the engine control portion of the traction control function and sends a serial data message to the EBCM

indicating that torque reduction is not allowed. The ECM will typically set other DTCs and the EBCM will set DTC C0242.

Actions Taken when the DTC Sets

* The EBCM disables the antilock brake system (ABS), traction control and StabiliTrak for the duration of the ignition cycle.

* A DIC message and/or a warning indicator may be displayed.

Conditions for Clearing the DTC

* The condition for the DTC is no longer present.

* The EBCM clears the history DTC when a current DTC is not detected in 40 consecutive drive cycles.

Reference Information

Schematic Reference

Antilock Brake System Schematics (See: Brakes and Traction Control/Antilock Brakes / Traction Control Systems/Diagrams/Electrical Diagrams)

Connector End View Reference

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

Description and Operation

ABS Description and Operation (See: Brakes and Traction Control/Antilock Brakes / Traction Control Systems/Description and Operation)

Electrical Information Reference

* 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)

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

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

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

Scan Tool Reference

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

Circuit/System Verification

Verify that no DTCs are set in the ECM.

If DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle (See: Diagnostic Trouble Code Descriptions/Diagnostic Trouble Code

(DTC) List - Vehicle).

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DTC Descriptors

DTC C0800 03

- Device Power 1 Circuit Voltage Below Threshold

DTC C0800 07

- Device Power 1 Circuit Voltage Above Threshold

Diagnostic Fault Information

Circuit/System Description

The electronic parking brake control module (EPB) monitors the system voltage circuit to determine if the voltage is within the normal operating

range. When the EPB detects that the system voltage is below 9.2 V or above 16 V, the DTC C0800 sets.

Conditions for Running the DTC

* Ignition is ON.

* Engine ON.

Conditions for Setting the DTC

C0800 03

* The EPB detects that the system voltage is less than 9.2 V.

* The above condition is present for 7 seconds.

C0800 07

* The EPB detects that the system voltage is greater than 16 V.

* The above condition is present for 7 seconds.

Action Taken When the DTC Sets

The Driver Information Center (DIC)displays the SERVICE PARKING BRAKE message.

Conditions for Clearing the DTC

The system voltage returns to normal operating range.

Diagnostic Aids

* A high or low voltage DTC set in multiple modules indicates a concern in the charging system.

* A possible cause of this DTC could be overcharging with a battery charger or jump starting.

* A high or low voltage value in multiple modules indicates a concern in the charging system.

Reference Information

Schematic Reference

Park Brake System Schematics (See: Brakes and Traction Control/Parking Brake System/Diagrams/Electrical Diagrams)

Connector End View Reference

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

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

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DTC Descriptors

DTC B1025 01

- Audio Output 1 Left Front Circuit Short to Battery (LF Door)

DTC B1025 02

- Audio Output 1 Left Front Circuit Short to Ground (LF Door)

DTC B1025 04

- Audio Output 1 Left Front Circuit Open (LF Door)

DTC B1035 01

- Audio Output 2 Right Front Circuit Short to Battery (RF Door)

DTC B1035 02

- Audio Output 2 Right Front Circuit Short to Ground (RF Door)

DTC B1035 04

- Audio Output 2 Right Front Circuit Open (RF Door)

DTC B1045 01

- Audio Output 3 Left Rear Circuit Short to Battery (LR Door)

DTC B1045 02

- Audio Output 3 Left Rear Circuit Short to Ground (LR Door)

DTC B1045 04

- Audio Output 3 Left Rear Circuit Open (LR Door)

DTC B1055 01

- Audio Output 4 Right Rear Circuit Short to Battery (RR Door)

DTC B1055 02

- Audio Output 4 Right Rear Circuit Short to Ground (RR Door)

DTC B1055 04

- Audio Output 4 Right Rear Circuit Open (RR Door)

DTC B1065 01

- Audio Output 5 Circuit Short to Battery (Center IP)

DTC B1065 02

- Audio Output 5 Circuit Short to Ground (Center IP)

DTC B1065 04

- Audio Output 5 Circuit Open (Center IP)

DTC B1075 01

- Audio Output 6 Circuit Short to Battery (Subwoofer)

DTC B1075 02

- Audio Output 6 Circuit Short to Ground (Subwoofer)

DTC B1085 01

- Audio Output 7 Circuit Short to Battery (LR Shelf)

DTC B1085 02

- Audio Output 7 Circuit Short to Ground (LR Shelf)

DTC B1085 04

- Audio Output 7 Circuit Open (LR Shelf)

DTC B1095 01

- Audio Output 8 Circuit Short to Battery (RR Shelf)

DTC B1095 02

- Audio Output 8 Circuit Short to Ground (RR Shelf)

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DTC Descriptors

B009D 01

- Pedestrian Impact Detection Safing Sensor Short to Battery

B009D 02

- Pedestrian Impact Detection Safing Sensor Short to Ground

B009D 08

- Pedestrian Impact Detection Safing Sensor Signal Invalid/Open Circuit

B009D 39

- Pedestrian Impact Detection Safing Sensor Internal Electronic Failure

B009D 3A

- Pedestrian Impact Detection Safing Sensor Incorrect Component Installed

Diagnostic Fault Information

Circuit/System Description

The pedestrian impact detection system senses and discriminates vehicle impacts and deploys the pedestrian hood hinge actuators in a timely

manner to protect vulnerable pedestrians. The safing sensor provides vehicle acceleration information to the pedestrian impact detection module.

The pedestrian impact detection module uses vehicle acceleration information from the safing sensor and force information from the discrimination

sensor to determine those events when the deployment of the hood hinge actuator is expected. The pedestrian impact detection module provides a

two wire current loop interface to the safing sensor. The pedestrian impact detection module also provides power and ground to the safing sensor

over the same two wire discrete interface. The pedestrian impact detection module monitors the safing sensor for any system malfunction and when

a malfunction is detected, a DTC will be stored in non volatile memory.

Conditions for Running the DTC

Ignition voltage is between 9-16 volts.

Conditions for Setting the DTC

B009D 01

The safing sensor voltage is greater than 3.2 V and the safing sensor voltage is not supplied by the pedestrian impact detection module.

B009D 02

The safing sensor voltage is less than 3.5 V and the safing sensor voltage is being supplied by the pedestrian impact detection module.

B009D 08

The safing sensor high and/or low circuit is open. An open circuit indicates no new data received.

B009D 39

The safing sensor sends an error message or invalid data to the pedestrian impact detection module.

B009D 3A

Invalid safing sensor ID data received by the pedestrian impact detection module

Action Taken When the DTC Sets

* The pedestrian impact detection module commands the DIC to display Service Pedestrian Protection System.

* The pedestrian impact detection module stores DTC in memory.

Conditions for Clearing the DTC

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DTC Descriptors

DTC B1000 00

- Electronic Control Unit (ECU) Performance No Additional Information Available

DTC B1000 04

- Side Object Detection Performance - RAM Failure

DTC B1000 08

- Electronic Control Unit (ECU) Performance Signal Invalid

DTC B1000 12

- Electronic Control Unit (ECU) Performance Below Minimum Threshold

DTC B1000 31

- Electronic Control Unit (ECU) General Checksum Problem

DTC B1000 33

- Electronic Control Unit (ECU) Performance Special Memory Failure

DTC B1000 34

- Electronic Control Unit (ECU) Performance RAM Integrity

DTC B1000 35

- Electronic Control Unit (ECU) Performance ROM Integrity

DTC B1000 36

- Electronic Control Unit (ECU) Performance EEPROM Integrity

DTC B1000 37

- Electronic Control Unit (ECU) Performance Watchdog / Safety Failure

DTC B1000 38

- Electronic Control Unit (ECU) Performance Supervision Software Failure

DTC B1000 39

- Electronic Control Unit (ECU) Performance Internal Electronic Failure

DTC B1000 43

- Electronic Control Unit (ECU) Performance EEPROM Error

DTC B1000 46

- Side Object Detection Performance - Invalid Configuration

DTC B1000 56

- Electronic Control Unit (ECU) Performance Allowable Number of Transitions / Events Exceeded

DTC B1000 57

- Electronic Control Unit (ECU) Performance

DTC B1000 73

- Electronic Control Unit (ECU) Performance Parity Error

DTC B1000 0F

- Electronic Control Unit (ECU) Performance Erratic

DTC B1000 2B

- Electronic Control Unit (ECU) Performance Missing Reference

DTC B1000 2C

- Electronic Control Unit Performance Reserved

DTC B1000 3B

- Electronic Control Unit (ECU) Performance Internal Self Test Failed

DTC B1000 3C

- Electronic Control Unit (ECU) Performance Internal Communications Failure

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DTC Descriptors

DTC B1370 01

- Device Ignition 1 (ON and START) Circuit Short to Battery

DTC B1370 06

- Device Ignition 1 (ON and START) Circuit Short to Ground or Open

DTC B1380 01

- Device Ignition ACCESSORY Circuit Short to Battery

DTC B1380 06

- Device Ignition ACCESSORY Circuit Short to Ground or Open

DTC B1440 00

- Power Mode Master Input Circuits Mismatch

DTC B1441 01

- Device Ignition OFF, RUN, and CRANK Circuit Short to Battery

DTC B1441 06

- Device Ignition OFF, RUN, and CRANK Circuit Short to Ground or Open

Diagnostic Fault Information

Circuit/System Description

The vehicle power mode master (PMM) is the body control module (BCM). The ignition switch is a low current switch with multiple discrete

ignition switch signals to the PMM for determination of the power mode. The PMM receives the ignition switch signals, and additionally a

reference voltage signal from the BCM, through the ignition switch, and back to the BCM. There are redundancies within the PMM system that can

allow operation of certain subsystems when there are faults in the ignition switch circuits. Other information such as serial data input from other

modules and DTCs is also used to determine what power mode signals and information is transmitted by the PMM. The BCM logic uses all this

information to identify the operator's desired power mode and activate specific discrete signals, and serial data messages for the operation of

different subsystems as necessary. Other modules which have switched voltage inputs may operate in a default mode if the PMM serial data

message does not match what the individual module can detect from its own connections.

The PMM will activate relays and other direct outputs of the PMM as needed according to the calculated power mode. Some relays controlled by

the BCM are switched ignition voltage outputs that are pass through circuits within the BCM directly from the ignition switch. If these circuits short

to ground, the B+ circuit fuse to the ignition switch will open.

Conditions for Running the DTC

B1370 01

Ignition switch is in the OFF or ACC positions.

B1370 06, B1380 01, B1441 01, B1441 06

Ignition switch is in the START position.

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DTC Descriptors

DTC P0192

- Fuel Rail Pressure Sensor Circuit Low Voltage

DTC P0193

- Fuel Rail Pressure Sensor Circuit High Voltage

Diagnostic Fault Information

Circuit/System Description

The fuel rail fuel pressure sensor detects fuel pressure within the fuel rail. The engine control module (ECM) provides a 5 V reference voltage on

the 5 V reference circuit and ground on the reference ground circuit. The ECM receives a varying signal voltage on the signal circuit. The ECM

monitors the voltage on the fuel rail fuel pressure sensor circuits. When the fuel pressure is high, the signal voltage is high. When the fuel pressure

is low, the signal voltage is low.

Conditions for Running the DTC

* The ignition is ON or the engine is running.

* The DTCs run continuously within the enabling conditions.

Conditions for Setting the DTC

P0192

The ECM detects that the signal circuit voltage is less than 0.2 V for greater than 5 seconds.

P0193

The ECM detects that the signal circuit voltage is greater than 4.8 V for greater than 5 seconds.

Action Taken When the DTC Sets

* DTCs P0192 and P0193 are Type A DTCs.

* A message center or an indicator may display Reduced Engine Power.

Conditions for Clearing the DTC

DTCs P0192 and P0193 are Type A DTCs.

Reference Information

Schematic Reference

Engine Controls Schematics (LLT) (See: Diagrams/Electrical Diagrams/Powertrain Management/System Diagram)Engine Controls Schematics

(LF1) (See: Diagrams/Electrical Diagrams/Powertrain Management/System Diagram)

Connector End View Reference

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

Description and Operation

Fuel System Description (See: Powertrain Management/Computers and Control Systems/Description and Operation/Fuel System Description)

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)

DTC Type Reference

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

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DTC Descriptors

DTC P0137

- HO2S Circuit Low Voltage Bank 1 Sensor 2

DTC P0138

- HO2S Circuit High Voltage Bank 1 Sensor 2

DTC P0140

- HO2S Circuit Insufficient Activity Bank 1 Sensor 2

DTC P0157

- HO2S Circuit Low Voltage Bank 2 Sensor 2

DTC P0158

- HO2S Circuit High Voltage Bank 2 Sensor 2

DTC P0160

- HO2S Circuit Insufficient Activity Bank 2 Sensor 2

Diagnostic Fault Information

Typical Scan Tool Data

Circuit Description

The heated oxygen sensors (HO2S) are used for fuel control and catalyst monitoring. Each HO2S compares the oxygen content of the surrounding

air with the oxygen content of the exhaust stream. When the engine is started, the control module operates in an Open Loop mode, ignoring the

HO2S signal voltage while calculating the air-to-fuel ratio. The control module supplies the HO2S with a reference, or bias voltage of about 450

mV. While the engine runs, the HO2S heats up and begins to generate a voltage within a range of 0-1,000 mV. This voltage will fluctuate above

and below the bias voltage. Once sufficient HO2S voltage fluctuation is observed by the control module, Closed Loop is entered. The control

module uses the HO2S voltage to determine the air-to-fuel ratio. An HO2S voltage that increases above bias voltage toward 1,000 mV indicates a

rich fuel mixture. An HO2S voltage that decreases below bias voltage toward 0 mV indicates a lean fuel mixture.

The heating elements inside each HO2S heat the sensor to bring the sensor up to operating conditions faster. This allows the system to enter Closed

Loop earlier and the control module to calculate the air-to-fuel ratio sooner.

Conditions for Running the DTCs

P0137 and P0157

* DTC P0036, P0037, P0038, P0056, P0057, P0058, P0116, P0117, P0118, P0119, or P0128 is not set.

* The engine speed is greater than 240 RPM.

* The ignition voltage is greater than 10 volts.

* The engine coolant temperature is colder than 40掳C (104掳F) at start-up and the engine coolant temperature was warmer than 60掳C (140掳F)

when the ignition was turned OFF last ignition cycle.

* The calculated exhaust temperature at the HO2S 2 is warmer than 700掳C (1,292掳F) and the HO2S 2 is warmed up for greater than 90

seconds.

* The calculated exhaust temperature is colder than 800掳C (1472掳F) 5 seconds after engine start.

* DTCs P0137 and P0157 run continuously once the above conditions are met.

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2010 Cadillac CTS Sedan AWD V6-3.6L Page 905

DTC Descriptors

DTC P000A

- Intake Camshaft Position System Slow Response Bank 1

DTC P000B

- Exhaust Camshaft Position System Slow Response Bank 1

DTC P000C

- Intake Camshaft Position System Slow Response Bank 2

DTC P000D

- Exhaust Camshaft Position System Slow Response Bank 2

DTC P0011

- Intake Camshaft Position System Performance Bank 1

DTC P0014

- Exhaust Camshaft Position System Performance Bank 1

DTC P0021

- Intake Camshaft Position System Performance Bank 2

DTC P0024

- Exhaust Camshaft Position System Performance Bank 2

Circuit/System Description

The camshaft position actuator system enables the Engine Control Module (ECM) to change the timing of the camshafts while the engine is

operating. The camshaft position actuator solenoid signal from the ECM is pulse width modulated (PWM). The ECM controls the camshaft position

actuator solenoid duty cycle by controlling the amount of solenoid ON time. The camshaft position actuator solenoid controls the advance or the

retard of each camshaft. The camshaft position actuator solenoid controls the oil flow that applies the pressure to advance or retard the camshafts.

Conditions for Running the DTC

* Before the ECM can report DTC P000A, P000B, P000C, P000D, P0011, P0014, P0021, or P0024 failed, DTCs P0010, P0013, P0020,

P0023, P0341, P0342, P0343, P0346, P0347, P0348, P0366, P0367, P0368, P0391, P0392, P0393, P2088, P2089, P2090, P2091, P2092,

P2093, P2094, and P2095 must run and pass.

* DTC P0016, P0017, P0018, P0019, P0335, P0336, or P0338 is not set.

* The engine is operating for greater than 1 seconds.

* The engine speed is greater than 520 RPM.

* The engine must accelerate such that the CMP actuator system is commanded from the park position to the phased position. This is

considered a cam control cycle. There must be a minimum of 2 cam control cycles for at least 2.5 seconds each in the phased position.

* DTCs P000A, P000B, P000C, P000D, P0011, P0014, P0021, and P0024 run continuously once the above conditions are met for greater than

600 seconds.

Conditions for Setting the DTC

* The ECM detects the difference between the desired camshaft position angle and the actual camshaft position angle is greater than 7-8

degrees.

OR

* The ECM detects a slow response, a deviation greater than 1.5 degrees in time greater than 2 seconds, for the actual camshaft position angle

to match the desired position angle during the test.

* Either condition exists for greater than 1 second or a cumulative of 10 seconds.

Action Taken When the DTC Sets

DTCs P000A, P000B, P000C, P000D, P0011, P0014, P0021, and P0024 are type B DTCs.

Conditions for Clearing the DTC

DTCs P000A, P000B, P000C, P000D, P0011, P0014, P0021, and P0024 are type B DTCs.

Reference Information

Schematic Reference

Engine Controls Schematics (LLT) (See: Diagrams/Electrical Diagrams/Powertrain Management/System Diagram)Engine Controls Schematics

(LF1) (See: Diagrams/Electrical Diagrams/Powertrain Management/System Diagram)

Connector End View Reference

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2010 Cadillac CTS Sedan AWD V6-3.6L Page 333

DTC Descriptors

DTC B1025 01

- Audio Output 1 Left Front Circuit Short to Battery (LF Door)

DTC B1025 02

- Audio Output 1 Left Front Circuit Short to Ground (LF Door)

DTC B1025 04

- Audio Output 1 Left Front Circuit Open (LF Door)

DTC B1035 01

- Audio Output 2 Right Front Circuit Short to Battery (RF Door)

DTC B1035 02

- Audio Output 2 Right Front Circuit Short to Ground (RF Door)

DTC B1035 04

- Audio Output 2 Right Front Circuit Open (RF Door)

DTC B1045 01

- Audio Output 3 Left Rear Circuit Short to Battery (LR Door)

DTC B1045 02

- Audio Output 3 Left Rear Circuit Short to Ground (LR Door)

DTC B1045 04

- Audio Output 3 Left Rear Circuit Open (LR Door)

DTC B1055 01

- Audio Output 4 Right Rear Circuit Short to Battery (RR Door)

DTC B1055 02

- Audio Output 4 Right Rear Circuit Short to Ground (RR Door)

DTC B1055 04

- Audio Output 4 Right Rear Circuit Open (RR Door)

DTC B1065 01

- Audio Output 5 Circuit Short to Battery (Center IP)

DTC B1065 02

- Audio Output 5 Circuit Short to Ground (Center IP)

DTC B1065 04

- Audio Output 5 Circuit Open (Center IP)

DTC B1075 01

- Audio Output 6 Circuit Short to Battery (Subwoofer)

DTC B1075 02

- Audio Output 6 Circuit Short to Ground (Subwoofer)

DTC B1085 01

- Audio Output 7 Circuit Short to Battery (LR Shelf)

DTC B1085 02

- Audio Output 7 Circuit Short to Ground (LR Shelf)

DTC B1085 04

- Audio Output 7 Circuit Open (LR Shelf)

DTC B1095 01

- Audio Output 8 Circuit Short to Battery (RR Shelf)

DTC B1095 02

- Audio Output 8 Circuit Short to Ground (RR Shelf)

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2010 Cadillac CTS Sedan AWD V6-3.6L Page 889

DTC Descriptors

DTC P018B

- Fuel Pressure Sensor Performance

DTC P018C

- Fuel Pressure Sensor Circuit Low Voltage

DTC P018D

- Fuel Pressure Sensor Circuit High Voltage

Diagnostic Fault Information

Circuit/System Description

The fuel pressure sensor is located on the fuel line. The fuel pressure sensor monitors the fuel pressure in the fuel line. The fuel pump control

module monitors the voltage signal from the fuel pressure sensor.

Conditions for Running the DTC

* The engine is running.

* DTC P018C, P018D, P0231, P0232, P023F, P064A, P1255 or P06A6 are not active.

* DTC P0641 has not failed this ignition cycle.

* Fuel pump control is enabled and the fuel pump control state is normal.

* The engine has been running for at least 5 seconds.

Conditions for Setting the DTC

The fuel pump control module does not detect a change in the fuel rail pressure of at least 30 kPa (4.4 psi) when the fuel pump is operating at its

minimum or maximum voltage limits for over 5 seconds.

Action Taken When the DTC Sets

DTC P018B, P018C and P018D are Type A DTCs.

Conditions for Clearing the DTC

DTC P018B, P018C and P018D are Type A DTCs.

Diagnostic Aids

Using the Failure Records data may help locate an intermittent condition. If you cannot duplicate the DTC, the information in the Failure Records

can help determine how many miles since the DTC set. The Fail Counter and Pass Counter can help determine how many ignition cycles that the

diagnostic test reported a pass and/or a fail.

Reference Information

Schematic Reference

Engine Controls Schematics (LLT) (See: Diagrams/Electrical Diagrams/Powertrain Management/System Diagram)Engine Controls Schematics

(LF1) (See: Diagrams/Electrical Diagrams/Powertrain Management/System Diagram)

Connector End View Reference

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

Description and Operation

Fuel System Description (See: Powertrain Management/Computers and Control Systems/Description and Operation/Fuel System Description)

Electrical Information Reference

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

* 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)

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

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

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2010 Cadillac CTS Sedan AWD V6-3.6L Page 160

DTC Descriptors

DTC B0083 00

- Front End Sensor 1 (Left)

DTC B0083 0F

- Front End Sensor 1 Erratic (Left)

DTC B0083 39

- Front End Sensor 1 Internal Electronic Failure (Left)

DTC B0083 3A

- Front End Sensor 1 Incorrect Component Installed (Left)

DTC B0084 00

- Front End Sensor 2 (Right)

DTC B0084 0F

- Front End Sensor 2 Erratic (Right)

DTC B0084 39

- Front End Sensor 2 Internal Electronic Failure (Right)

DTC B0084 3A

- Front End Sensor 2 Incorrect Component Installed (Right)

DTC B0085 00

- LF Side Impact Sensor

DTC B0085 0F

- LF Side Impact Sensor Erratic

DTC B0085 39

- LF Side Impact Sensor Internal Electronic Failure

DTC B0085 3A

- LF Side Impact Sensor Incorrect Component Installed

DTC B0086 00

- RF Side Impact Sensor

DTC B0086 0F

- RF Side Impact Sensor Erratic

DTC B0086 39

- RF Side Impact Sensor Internal Electronic Failure

DTC B0086 3A

- RF Side Impact Sensor Incorrect Component Installed

DTC B0087 00

- LR Side Impact Sensor

DTC B0087 0F

- LR Side Impact Sensor Erratic

DTC B0087 39

- LR Side Impact Sensor Internal Electronic Failure

DTC B0087 3A

- LR Side Impact Sensor Incorrect Component Installed

DTC B0088 00

- RR Side Impact Sensor

DTC B0088 0F

- RR Side Impact Sensor Erratic

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2010 Cadillac CTS Sedan AWD V6-3.6L Page 602

DTC Descriptors

DTC B0248 61

- Air Flow Control 3 Circuit Actuator Stuck

DTC B0268 61

- Air Flow Control 7 Circuit Actuator Stuck

DTC B0408 61

- Temperature Control 1 Circuit Actuator Stuck

DTC B0413 06

- Temperature Control 1 Feedback Circuit Short to Ground or Open

DTC B0418 61

- Temperature Control 2 Circuit Actuator Stuck

DTC B0423 06

- Temperature Control 2 Feedback Circuit Short to Ground or Open

DTC B3761 06

- Air Flow Control 3 Feedback Circuit Short to Ground or Open

DTC B3773 06

- Air Flow Control 7 Feedback Circuit Short to Ground or Open

Diagnostic Fault Information

Circuit/System Description

The HVAC control module controls the HVAC door actuators to regulate the airflow through the HVAC system. Each actuator consists of an

electric motor and a potentiometer. The module supplies a low reference and 5-volt reference source voltage to the potentiometer. The HVAC

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2010 Cadillac CTS Sedan AWD V6-3.6L Page 136

DTC Descriptors

DTC B0052 00

- Deployment Commanded

DTC B0053 00

- Deployment Commanded With Loop DTCs Present

DTC B0055 00

- Side Airbag Deployment Commanded

Circuit/System Description

The inflatable restraint sensing and diagnostic module (SDM) contains a sensing device that converts vehicle velocity changes into an electrical

signal. The SDM compares this electrical signal to a value stored in memory. When the generated signal exceeds the stored value, the SDM

performs additional signal processing and compares the generated signals to values stored in memory. When 2 of the generated signals exceed the

stored values, the SDM will cause current to flow through the appropriate deployment loops.

Conditions for Running the DTC

Ignition voltage is between 9-16 volts.

Conditions for Setting the DTC

B0052 00

* The SDM detects a frontal impact of sufficient force to warrant deployment of the frontal modules.

* The SDM detects a side impact of sufficient force to warrant deployment of a side impact module and/or roof rail module.

* The SDM has deployed the seat belt pretensioner for 3 separate deployments.

B0053 00

SDM commands inflators deployment with loop faults present.

B0055 00

* The SDM detects a frontal impact of sufficient force to warrant deployment of the frontal modules.

* The SDM detects a side impact of sufficient force to warrant deployment of a side impact module and/or roof rail module.

Action Taken When the DTC Sets

* The SDM will only set DTC B0052, or DTC B0055, or the SDM sets DTC B0053 along with DTC B0052.

* The SDM commands the AIR BAG warning lamp ON.

* The SDM records crash data.

Conditions for Clearing the DTC

* DTC B0052 can be cleared if the following conditions are met.

- Three consecutive seat belt pretensioner deployment events have not occurred.

- One frontal or side air bag deployment has not occurred.

* DTC B0052 becomes a latched DTC after 3 consecutive pretensioner deployments or 1 frontal or side air bag deployment. The DTC is a

latched DTC and cannot be cleared. Replace the SDM after following the instructions in the diagnostic test.

* DTC B0055 is a latched DTC and cannot be cleared.

Reference Information

Schematic Reference

SIR Schematics (See: Diagrams/Electrical Diagrams/Air Bag Systems)

Connector End View Reference

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

Description and Operation

SIR System Description and Operation (See: Restraints and Safety Systems/Air Bag Systems/Description and Operation/SIR System Description

and Operation)

Electrical Information Reference

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

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