2010 Cadillac Truck SRX FWD V6-3.0L Page 1400

2010 Cadillac Truck SRX FWD V6-3.0L Page 1400

瀚慖f you find any of the above conditions, repair as necessary.

2. Ignition OFF, remove the T8 ignition coil of the misfiring cylinder, but leave the electrical connector connected.

3. Inspect the ignition coil boot for the following conditions:

* Holes

* Tears

* Carbon tracking

* Oil contamination

* water intrusion

瀚慖f you find any of the above conditions, repair as necessary.

4. Install the J 26792 - Spark Tester to the boot of the appropriate T8 ignition coil and ground.

Note: An erratic or weak spark is considered a no spark condition.

5. Attempt to start the engine and observe the J 26792 - Spark Tester. The spark tester should spark.

瀚慖f there is no spark, refer to Electronic Ignition System Diagnosis (See: Powertrain Management/Computers and Control

Systems/Testing and Inspection/Component Tests and General Diagnostics/Electronic Ignition System Diagnosis) for diagnosis of the

ignition coil.

6. Ignition OFF, remove the spark plug from the misfiring cylinder. Verify that the spark plug does not exhibit the following conditions:

* Gas, coolant, or oil fouled-Refer to Spark Plug Inspection (See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine Performance

Checks/Spark Plug/Testing and Inspection).

* Cracked, worn, incorrectly gapped-Refer to Ignition System Specifications (LAU) (See: Powertrain Management/Ignition

System/Specifications)Ignition System Specifications (LF1) (See: Powertrain Management/Ignition System/Specifications).

瀚慖f there is a condition with the spark plug, replace the spark plug.

7. Exchange the suspected spark plug with another cylinder that is operating correctly.

8. Engine idling, observe the scan tool Misfire Current Counter parameters. The misfire should not follow the spark plug exchange.

瀚慖f the misfire follows the spark plug, replace the spark plug.

9. If all conditions test normal, test or inspect for the following:

* A lean or rich Q17 fuel injector-Refer to Fuel Injector Solenoid Coil Test (LAU) (See: Powertrain Management/Fuel Delivery and Air

Induction/Fuel Injector/Testing and Inspection)Fuel Injector Solenoid Coil Test (LF1, LFW) (See: Powertrain Management/Fuel

Delivery and Air Induction/Fuel Injector/Testing and Inspection).

* An engine mechanical condition-Refer to Symptoms - Engine Mechanical (See: Engine, Cooling and Exhaust/Engine/Testing and

Inspection/Symptom Related Diagnostic Procedures/Symptoms - Engine Mechanical).

Repair Instructions

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

* Spark Plug Replacement (See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine Performance Checks/Spark Plug/Service and

Repair)

* To verify that the performance of the catalytic converter has not been affected by the condition that set this DTC, perform the Repair

Verification for DTC P0420 or P0430. Refer to Diagnostic Trouble Code (DTC) List - Vehicle (See: Diagnostic Trouble Code

Descriptions/Diagnostic Trouble Code (DTC) List - Vehicle) for DTC P0420 or P0430.

P0305

DTC P0300-P0306 (LF1, LFW)

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.

2010 Cadillac CTS Sedan AWD V6-3.6L Page 857

2010 Cadillac CTS Sedan AWD V6-3.6L Page 857

瀚慖f you find any of the above conditions, repair as necessary.

2. If all conditions test normal, test or replace the appropriate B52 HO2S.

Repair Instructions

Caution: Refer to Heated Oxygen Sensor Resistance Learn Reset Caution (See: Powertrain Management/Computers and Control

Systems/Oxygen Sensor/Service Precautions/Heated Oxygen Sensor Resistance Learn Reset Caution).

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

* Heated Oxygen Sensor Replacement - Bank 1 Sensor 1 (LF1) (See: Powertrain Management/Computers and Control Systems/Oxygen

Sensor/Service and Repair)Heated Oxygen Sensor Replacement - Bank 1 Sensor 1 (LLT) (See: Powertrain Management/Computers and

Control Systems/Oxygen Sensor/Service and Repair)

* Heated Oxygen Sensor Replacement - Bank 1 Sensor 2 (LF1) (See: Powertrain Management/Computers and Control Systems/Oxygen

Sensor/Service and Repair)Heated Oxygen Sensor Replacement - Bank 1 Sensor 2 (LLT) (See: Powertrain Management/Computers and

Control Systems/Oxygen Sensor/Service and Repair)

* Heated Oxygen Sensor Replacement - Bank 2 Sensor 1 (LF1) (See: Powertrain Management/Computers and Control Systems/Oxygen

Sensor/Service and Repair)Heated Oxygen Sensor Replacement - Bank 2 Sensor 1 (LLT) (See: Powertrain Management/Computers and

Control Systems/Oxygen Sensor/Service and Repair)

* Heated Oxygen Sensor Replacement - Bank 2 Sensor 2 (LF1) (See: Powertrain Management/Computers and Control Systems/Oxygen

Sensor/Service and Repair)Heated Oxygen Sensor Replacement - Bank 2 Sensor 2 (LLT) (See: Powertrain Management/Computers and

Control Systems/Oxygen Sensor/Service and Repair)

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

P013C

DTC P013A, P013C, P013E, or P014A (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 P013A

- HO2S Slow Response Rich to Lean Bank 1 Sensor 2

DTC P013C

- HO2S Slow Response Rich to Lean Bank 2 Sensor 2

DTC P013E

- HO2S Delayed Response Rich to Lean Bank 1 Sensor 2

DTC P014A

- HO2S Delayed Response Rich to Lean Bank 2 Sensor 2

Diagnostic Fault Information

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

2010 Cadillac CTS Sedan AWD V6-3.6L Page 1063

2010 Cadillac CTS Sedan AWD V6-3.6L Page 1063

瀚慖f you find any of the above conditions, repair as necessary.

6. If all circuits/connections test normal, replace the appropriate HO2S 1.

Repair Instructions

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

* Heated Oxygen Sensor Replacement - Bank 1 Sensor 1 (LF1) (See: Powertrain Management/Computers and Control Systems/Oxygen

Sensor/Service and Repair)Heated Oxygen Sensor Replacement - Bank 1 Sensor 1 (LLT) (See: Powertrain Management/Computers and

Control Systems/Oxygen Sensor/Service and Repair)

* Heated Oxygen Sensor Replacement - Bank 2 Sensor 1 (LF1) (See: Powertrain Management/Computers and Control Systems/Oxygen

Sensor/Service and Repair)Heated Oxygen Sensor Replacement - Bank 2 Sensor 1 (LLT) (See: Powertrain Management/Computers and

Control Systems/Oxygen Sensor/Service and Repair)

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

programming

P0132

DTC P0132 or P0152 (with 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 P0132

- HO2S Circuit High Voltage Bank 1 Sensor 1

DTC P0152

- HO2S Circuit High Voltage Bank 2 Sensor 1

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

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1987

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1987

瀚慖f you find any of the above conditions, repair as necessary.

2. Verify that there is no misfire on cylinders 1, 4, 6, or 7 due to cylinder deactivation-Refer to Cylinder Deactivation (Active Fuel

Management) System Diagnosis (See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Component Tests

and General Diagnostics/Cylinder Deactivation (Active Fuel Management) System Diagnosis).

3. Ignition OFF, install the J 26792 - Tester to the spark plug wire boot of the misfiring cylinder.

Note: An erratic or weak spark is considered a no spark condition.

4. Attempt to start the engine and observe the J 26792 - Tester. The spark tester should spark.

瀚慖f there is no spark, test the spark plug wire for the correct resistance, refer to Ignition System Specifications (See: Powertrain

Management/Ignition System/Specifications) and Spark Plug Wire Inspection (See: Engine, Cooling and Exhaust/Engine/Tune-up and

Engine Performance Checks/Ignition Cable/Testing and Inspection).

瀚慖f the spark plug wire tests normal, refer to Electronic Ignition System Diagnosis (See: Powertrain Management/Computers and Control

Systems/Testing and Inspection/Component Tests and General Diagnostics/Electronic Ignition System Diagnosis) for diagnosis of the

ignition coil.

5. Ignition OFF, remove the spark plug from the misfiring cylinder. Verify that the following conditions do not exist with the spark plug:

* Gas, coolant, or oil fouled

* Cracked, worn, or incorrectly gapped-Refer to Spark Plug Inspection (See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine

Performance Checks/Spark Plug/Testing and Inspection).

瀚慖f there is a condition with the spark plug, replace the spark plug.

6. Exchange the suspected spark plug with another cylinder that is operating correctly.

7. Operate the engine under the conditions in which the misfire occurred. This may include putting the engine under a load or allowing the

engine to return to a cold condition. Observe the Misfire Current Counters with a scan tool. The misfire should not follow the spark plug

exchange.

瀚慖f the misfire follows with the spark plug, replace the spark plug.

8. If all conditions test normal, test or inspect for the following:

* A lean or rich fuel injector-Refer to Fuel Injector Diagnosis (CH47976) (See: Powertrain Management/Fuel Delivery and Air

Induction/Fuel Injector/Testing and Inspection)Fuel Injector Diagnosis (J39021 or Scan Tool) (See: Powertrain Management/Fuel

Delivery and Air Induction/Fuel Injector/Testing and Inspection).

* An engine mechanical condition-Refer to Symptoms - Engine Mechanical (See: Engine, Cooling and Exhaust/Engine/Testing and

Inspection/Symptom Related Diagnostic Procedures/Symptoms - Engine Mechanical).

Repair Instructions

* Spark Plug Wire Replacement (See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine Performance Checks/Ignition Cable/Service

and Repair)

* Spark Plug Replacement (See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine Performance Checks/Spark Plug/Service and

Repair)

Repair Verification

1. Install any components that have been removed or replaced during diagnosis.

2. Clear the DTCs.

3. Turn OFF the ignition for 60 seconds.

4. If the repair was related to a DTC, duplicate the Conditions for Running the DTC and use the Freeze Frame/Failure Records, if applicable, in

order to verify the DTC does not reset. If the DTC resets or another DTC is present, refer to the Diagnostic Trouble Code (DTC) List -

Vehicle (See: Diagnostic Trouble Code Descriptions/Diagnostic Trouble Code (DTC) List - Vehicle) and perform the appropriate diagnostic

procedure.

5. To verify that the performance of the catalytic converter has not been affected by the condition that set this DTC, perform the Repair

Verification for DTCs P0420 and P0430. Refer to DTC P0420 or P0430 (See: P Code Charts/P0420).

P0305

DTC P0300-P0308

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

2010 Cadillac Truck SRX AWD V6-3.0L Page 1400

2010 Cadillac Truck SRX AWD V6-3.0L Page 1400

瀚慖f you find any of the above conditions, repair as necessary.

2. Ignition OFF, remove the T8 ignition coil of the misfiring cylinder, but leave the electrical connector connected.

3. Inspect the ignition coil boot for the following conditions:

* Holes

* Tears

* Carbon tracking

* Oil contamination

* water intrusion

瀚慖f you find any of the above conditions, repair as necessary.

4. Install the J 26792 - Spark Tester to the boot of the appropriate T8 ignition coil and ground.

Note: An erratic or weak spark is considered a no spark condition.

5. Attempt to start the engine and observe the J 26792 - Spark Tester. The spark tester should spark.

瀚慖f there is no spark, refer to Electronic Ignition System Diagnosis (See: Powertrain Management/Computers and Control

Systems/Testing and Inspection/Component Tests and General Diagnostics/Electronic Ignition System Diagnosis) for diagnosis of the

ignition coil.

6. Ignition OFF, remove the spark plug from the misfiring cylinder. Verify that the spark plug does not exhibit the following conditions:

* Gas, coolant, or oil fouled-Refer to Spark Plug Inspection (See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine Performance

Checks/Spark Plug/Testing and Inspection).

* Cracked, worn, incorrectly gapped-Refer to Ignition System Specifications (LAU) (See: Powertrain Management/Ignition

System/Specifications)Ignition System Specifications (LF1) (See: Powertrain Management/Ignition System/Specifications).

瀚慖f there is a condition with the spark plug, replace the spark plug.

7. Exchange the suspected spark plug with another cylinder that is operating correctly.

8. Engine idling, observe the scan tool Misfire Current Counter parameters. The misfire should not follow the spark plug exchange.

瀚慖f the misfire follows the spark plug, replace the spark plug.

9. If all conditions test normal, test or inspect for the following:

* A lean or rich Q17 fuel injector-Refer to Fuel Injector Solenoid Coil Test (LAU) (See: Powertrain Management/Fuel Delivery and Air

Induction/Fuel Injector/Testing and Inspection)Fuel Injector Solenoid Coil Test (LF1, LFW) (See: Powertrain Management/Fuel

Delivery and Air Induction/Fuel Injector/Testing and Inspection).

* An engine mechanical condition-Refer to Symptoms - Engine Mechanical (See: Engine, Cooling and Exhaust/Engine/Testing and

Inspection/Symptom Related Diagnostic Procedures/Symptoms - Engine Mechanical).

Repair Instructions

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

* Spark Plug Replacement (See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine Performance Checks/Spark Plug/Service and

Repair)

* To verify that the performance of the catalytic converter has not been affected by the condition that set this DTC, perform the Repair

Verification for DTC P0420 or P0430. Refer to Diagnostic Trouble Code (DTC) List - Vehicle (See: Diagnostic Trouble Code

Descriptions/Diagnostic Trouble Code (DTC) List - Vehicle) for DTC P0420 or P0430.

P0305

DTC P0300-P0306 (LF1, LFW)

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.

2010 Cadillac Truck Escalade RWD V8-6.2L Page 1987

2010 Cadillac Truck Escalade RWD V8-6.2L Page 1987

瀚慖f you find any of the above conditions, repair as necessary.

2. Verify that there is no misfire on cylinders 1, 4, 6, or 7 due to cylinder deactivation-Refer to Cylinder Deactivation (Active Fuel

Management) System Diagnosis (See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Component Tests

and General Diagnostics/Cylinder Deactivation (Active Fuel Management) System Diagnosis).

3. Ignition OFF, install the J 26792 - Tester to the spark plug wire boot of the misfiring cylinder.

Note: An erratic or weak spark is considered a no spark condition.

4. Attempt to start the engine and observe the J 26792 - Tester. The spark tester should spark.

瀚慖f there is no spark, test the spark plug wire for the correct resistance, refer to Ignition System Specifications (See: Powertrain

Management/Ignition System/Specifications) and Spark Plug Wire Inspection (See: Engine, Cooling and Exhaust/Engine/Tune-up and

Engine Performance Checks/Ignition Cable/Testing and Inspection).

瀚慖f the spark plug wire tests normal, refer to Electronic Ignition System Diagnosis (See: Powertrain Management/Computers and Control

Systems/Testing and Inspection/Component Tests and General Diagnostics/Electronic Ignition System Diagnosis) for diagnosis of the

ignition coil.

5. Ignition OFF, remove the spark plug from the misfiring cylinder. Verify that the following conditions do not exist with the spark plug:

* Gas, coolant, or oil fouled

* Cracked, worn, or incorrectly gapped-Refer to Spark Plug Inspection (See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine

Performance Checks/Spark Plug/Testing and Inspection).

瀚慖f there is a condition with the spark plug, replace the spark plug.

6. Exchange the suspected spark plug with another cylinder that is operating correctly.

7. Operate the engine under the conditions in which the misfire occurred. This may include putting the engine under a load or allowing the

engine to return to a cold condition. Observe the Misfire Current Counters with a scan tool. The misfire should not follow the spark plug

exchange.

瀚慖f the misfire follows with the spark plug, replace the spark plug.

8. If all conditions test normal, test or inspect for the following:

* A lean or rich fuel injector-Refer to Fuel Injector Diagnosis (CH47976) (See: Powertrain Management/Fuel Delivery and Air

Induction/Fuel Injector/Testing and Inspection)Fuel Injector Diagnosis (J39021 or Scan Tool) (See: Powertrain Management/Fuel

Delivery and Air Induction/Fuel Injector/Testing and Inspection).

* An engine mechanical condition-Refer to Symptoms - Engine Mechanical (See: Engine, Cooling and Exhaust/Engine/Testing and

Inspection/Symptom Related Diagnostic Procedures/Symptoms - Engine Mechanical).

Repair Instructions

* Spark Plug Wire Replacement (See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine Performance Checks/Ignition Cable/Service

and Repair)

* Spark Plug Replacement (See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine Performance Checks/Spark Plug/Service and

Repair)

Repair Verification

1. Install any components that have been removed or replaced during diagnosis.

2. Clear the DTCs.

3. Turn OFF the ignition for 60 seconds.

4. If the repair was related to a DTC, duplicate the Conditions for Running the DTC and use the Freeze Frame/Failure Records, if applicable, in

order to verify the DTC does not reset. If the DTC resets or another DTC is present, refer to the Diagnostic Trouble Code (DTC) List -

Vehicle (See: Diagnostic Trouble Code Descriptions/Diagnostic Trouble Code (DTC) List - Vehicle) and perform the appropriate diagnostic

procedure.

5. To verify that the performance of the catalytic converter has not been affected by the condition that set this DTC, perform the Repair

Verification for DTCs P0420 and P0430. Refer to DTC P0420 or P0430 (See: P Code Charts/P0420).

P0305

DTC P0300-P0308

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

2010 Cadillac Truck SRX AWD V6-3.0L Page 1537

2010 Cadillac Truck SRX AWD V6-3.0L Page 1537

瀚慖f a condition is found, repair as necessary.

Repair Instructions

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

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 (LAU) (See: Powertrain Management/Fuel Delivery and Air

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

P0507

DTC P0506 or P0507 (LF1, LFW)

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 P0506

- Idle Speed Low

DTC P0507

- Idle Speed High

Circuit/System Description

The throttle actuator control (TAC) motor is a DC motor that is part of the throttle body assembly. The TAC motor drives the throttle valve. The

engine control module (ECM) controls the TAC motor based on throttle position sensor input. The idle speed is controlled by the ECM based on

various inputs. The ECM commands the TAC motor to open or close the throttle valve in order to maintain the desired idle speed.

Conditions for Running the DTC

* DTCs P0068, P0101, P0102, P0103, P0112, P0113, P0117, P0118, P0121, P0122, P0123, P0171, P0172, P0174, P0175, P0222, P0223,

P0261, P0262, P0264, P0265, P0267, P0268. P0270, P0271, P0273, P0274, P0276, P0277, P0300-P0306, P0351-P0356, P0461-P0464,

P0496, P0627, P0628, P0629, P0722, P1516, P2066-P2068, are not set.

* The barometric pressure (BARO) is greater than 70 kPa.

* The engine coolant temperature (ECT) is greater than 60掳C (140掳F).

* The engine run time is greater than 60 seconds.

* The ignition voltage is between 11-18 volts.

* The transmission is not changing gears.

* The torque converter clutch (TCC) is not changing states.

* The intake air temperature (IAT) is warmer than -20掳C (-4掳F).

* The vehicle speed is less than 3 km/h (2 mph).

* The commanded RPM is steady within 25 RPM.

* The engine is idling for greater than 5 seconds.

* The DTCs run when the above conditions are met.

Conditions for Setting the DTC

P0506

The actual engine speed is 94 RPM less than the desired idle speed for 10 seconds.

P0507

The actual engine speed is 188 RPM greater than the desired idle speed for 10 seconds.

Action Taken When the DTC Sets

DTCs P0506 and P0507 are Type B DTCs.

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 937

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 937

瀚慖f you find a condition with the timing chains or tensioners, repair as necessary.

2. Inspect the crankshaft reluctor wheel for being mis-positioned on the crankshaft.

瀚慖f you find a condition with the crankshaft, repair as necessary.

Repair Instructions

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

* Timing Chain Alignment Diagram (See: Engine, Cooling and Exhaust/Engine/Timing Components/Timing Component Alignment

Marks/Locations)

* Camshaft Timing Drive Components Cleaning and Inspection (See: Engine, Cooling and Exhaust/Engine/Service and Repair/Overhaul/81.

Camshaft Timing Drive Components Cleaning and Inspection)

* Crankshaft and Bearing Cleaning and Inspection (See: Engine, Cooling and Exhaust/Engine/Service and Repair/Overhaul/66. Crankshaft

and Bearing Cleaning and Inspection)

P0009

DTC P0008 or P0009

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 P0008

- Engine Position System Performance Bank 1

DTC P0009

- Engine Position System Performance Bank 2

Circuit/System Description

The engine control module (ECM) tests for a misalignment between both camshafts on one bank of the engine and the crankshaft. The

misalignment would be at an idler sprocket for either bank or at the crankshaft. Once the ECM learns the position of both camshafts on one bank of

the engine, the ECM compares the learned values to a reference value. The ECM will set a DTC if both learned values for one bank of the engine

are exceeding a calibrated threshold in the same direction.

Conditions for Running the DTC

* DTC P0010, P0011, P0013, P0014, P0020, P0021, P0023, P0024, P0341, P0342, P0343, P0346, P0347, P0348, P0366, P0367, P0368,

P0391, P0392, P0393, P2088, P2089, P2090, P2091, P2092, P2093, P2094, or P2095 is not set.

* The engine is operating for greater than 2 s.

* 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 s each, in the phased position.

* DTC P0008 and P0009 run continuously once the above conditions are met, approximately 600 s.

Conditions for Setting the DTC

The ECM detects that both camshafts on either bank of the engine are mis-aligned with the crankshaft for greater than 1 s or for a cumulative time

of 4 s.

Action Taken When the DTC Sets

DTC P0008 and P0009 are type B DTCs.

Conditions for Clearing the DTC

DTC P0008 and P0009 are type B DTCs.

2010 Cadillac Truck Escalade AWD V8-6.2L Page 2627

锟斤拷If you find any of the above conditions, repair as necessary.

6. If all circuits test normal, replace the appropriate B52 HO2S.

Repair Instructions

Caution: Refer to Heated Oxygen Sensor Resistance Learn Reset Caution (See: Powertrain Management/Computers and Control

Systems/Oxygen Sensor/Service Precautions/Heated Oxygen Sensor Resistance Learn Reset Caution).

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

* Heated Oxygen Sensor Replacement - Bank 1 Sensor 2 (1500 Series) (See: Powertrain Management/Computers and Control

Systems/Oxygen Sensor/Service and Repair)Heated Oxygen Sensor Replacement - Bank 1 Sensor 2 (2500 Series) (See: Powertrain

Management/Computers and Control Systems/Oxygen Sensor/Service and Repair)

* Heated Oxygen Sensor Replacement - Bank 2 Sensor 2 (1500 Series) (See: Powertrain Management/Computers and Control

Systems/Oxygen Sensor/Service and Repair)Heated Oxygen Sensor Replacement - Bank 2 Sensor 2 (2500 Series) (See: Powertrain

Management/Computers and Control Systems/Oxygen Sensor/Service and Repair)

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

P2271

DTC P2271 or P2273

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 P2271

- HO2S Signal Stuck Rich Bank 1 Sensor 2

DTC P2273

- HO2S Signal Stuck Rich Bank 2 Sensor 2

Diagnostic Fault Information

Typical Scan Tool Data

Circuit/System Description

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

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1103

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1103

瀚慖f you find any of the above conditions, repair as necessary.

9. If all circuits/connections test normal, replace the B52 HO2S 1.

Repair Instructions

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

* Heated Oxygen Sensor Replacement - Sensor 1 (LAU) (See: Powertrain Management/Computers and Control Systems/Oxygen

Sensor/Service and Repair/Heated Oxygen Sensor Replacement - Sensor 1)

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

programming

P0135

DTC P0135 or P0141 (Without LF1)

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 P0135

- HO2S Heater Performance Sensor 1

DTC P0141

- HO2S Heater Performance Sensor 2

Diagnostic Fault Information

Circuit Description

The heated oxygen sensor (HO2S) heater reduces the time required for the oxygen sensor to reach operating temperature and maintains the

operating temperature during extended idle periods. When the ignition is turned to the ON position, ignition voltage is supplied directly to the

sensor heater. The engine control module (ECM) controls the heater operation by first modulating the control circuit to ground when the sensors are

cold. This prevents the possibility of thermal shock to the sensor, from condensation build-up on the sensor, by controlling the sensor's rate of

heating. After a predetermined amount of time, the ECM commands the heaters ON continuously. Once the sensor reaches operating temperature,

the ECM may modulate the heater control circuit to ground to maintain a desired temperature. The ECM controls the heater by grounding the

control circuit with a solid state device called a driver. The driver is equipped with a feedback circuit that is pulled up to voltage. The ECM can

determine if the control circuit is open, shorted to ground, or shorted to a voltage by monitoring the feedback voltage.

Conditions for Running the DTC

P0135

* Before the ECM can report DTC P0135 failed, P0030, P0031, and P0032 must run and pass.

* DTC P0130, P0131, P0132, or P0134 is not set.

* The engine is operating.

* The ignition voltage is 10-18 volts.

* The intake air temperature (IAT) is greater than -30掳C (-22掳F).

* After the previous ignition cycle the engine OFF time was greater than 2 minutes.

* The calculated exhaust temperature is less than 524掳C (975掳F).

* The engine is not in decel fuel cut-off (DFCO).

* The HO2S 1 is at operating temperature for greater than 10 seconds.

* The internal HO2S 1 resistance is less than 10,000 ohm.

* DTCs P0135 runs continuously once the above conditions are met for approximately 100 seconds.

2010 Cadillac Truck Escalade AWD V8-6.2L Page 2106

锟斤拷If you find any of the above conditions, repair as necessary.

2. Verify that there is no misfire on cylinders 1, 4, 6, or 7 due to cylinder deactivation-Refer to Cylinder Deactivation (Active Fuel

Management) System Diagnosis (See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Component Tests

and General Diagnostics/Cylinder Deactivation (Active Fuel Management) System Diagnosis).

3. Ignition OFF, install the J 26792 - Tester to the spark plug wire boot of the misfiring cylinder.

Note: An erratic or weak spark is considered a no spark condition.

4. Attempt to start the engine and observe the J 26792 - Tester. The spark tester should spark.

锟斤拷If there is no spark, test the spark plug wire for the correct resistance, refer to Ignition System Specifications (See: Powertrain

Management/Ignition System/Specifications) and Spark Plug Wire Inspection (See: Engine, Cooling and Exhaust/Engine/Tune-up and

Engine Performance Checks/Ignition Cable/Testing and Inspection).

锟斤拷If the spark plug wire tests normal, refer to Electronic Ignition System Diagnosis (See: Powertrain Management/Computers and Control

Systems/Testing and Inspection/Component Tests and General Diagnostics/Electronic Ignition System Diagnosis) for diagnosis of the

ignition coil.

5. Ignition OFF, remove the spark plug from the misfiring cylinder. Verify that the following conditions do not exist with the spark plug:

* Gas, coolant, or oil fouled

* Cracked, worn, or incorrectly gapped-Refer to Spark Plug Inspection (See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine

Performance Checks/Spark Plug/Testing and Inspection).

锟斤拷If there is a condition with the spark plug, replace the spark plug.

6. Exchange the suspected spark plug with another cylinder that is operating correctly.

7. Operate the engine under the conditions in which the misfire occurred. This may include putting the engine under a load or allowing the

engine to return to a cold condition. Observe the Misfire Current Counters with a scan tool. The misfire should not follow the spark plug

exchange.

锟斤拷If the misfire follows with the spark plug, replace the spark plug.

8. If all conditions test normal, test or inspect for the following:

* A lean or rich fuel injector-Refer to Fuel Injector Diagnosis (CH47976) (See: Powertrain Management/Fuel Delivery and Air

Induction/Fuel Injector/Testing and Inspection)Fuel Injector Diagnosis (J39021 or Scan Tool) (See: Powertrain Management/Fuel

Delivery and Air Induction/Fuel Injector/Testing and Inspection).

* An engine mechanical condition-Refer to Symptoms - Engine Mechanical (See: Engine, Cooling and Exhaust/Engine/Testing and

Inspection/Symptom Related Diagnostic Procedures/Symptoms - Engine Mechanical).

Repair Instructions

* Spark Plug Wire Replacement (See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine Performance Checks/Ignition Cable/Service

and Repair)

* Spark Plug Replacement (See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine Performance Checks/Spark Plug/Service and

Repair)

Repair Verification

1. Install any components that have been removed or replaced during diagnosis.

2. Clear the DTCs.

3. Turn OFF the ignition for 60 seconds.

4. If the repair was related to a DTC, duplicate the Conditions for Running the DTC and use the Freeze Frame/Failure Records, if applicable, in

order to verify the DTC does not reset. If the DTC resets or another DTC is present, refer to the Diagnostic Trouble Code (DTC) List -

Vehicle (See: Diagnostic Trouble Code Descriptions/Diagnostic Trouble Code (DTC) List - Vehicle) and perform the appropriate diagnostic

procedure.

5. To verify that the performance of the catalytic converter has not been affected by the condition that set this DTC, perform the Repair

Verification for DTCs P0420 and P0430. Refer to DTC P0420 or P0430 (See: P Code Charts/P0420).

P0315

DTC P0315

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

2010 Cadillac CTS Sedan AWD V6-3.6L Page 1304

2010 Cadillac CTS Sedan AWD V6-3.6L Page 1304

瀚慖f you find any of the above conditions, repair as necessary.

2. Ignition OFF, remove the T8 ignition coil of the misfiring cylinder, but leave the electrical connector connected.

3. Inspect the ignition coil boot for the following conditions:

* Holes

* Tears

* Carbon tracking

* Oil contamination

* water intrusion

瀚慖f you find any of the above conditions, repair as necessary.

4. Install the J 26792 - Spark Tester to the boot of the appropriate T8 ignition coil and ground.

Note: An erratic or weak spark is considered a no spark condition.

5. Attempt to start the engine and observe the J 26792 - Spark Tester. The spark tester should spark.

瀚慖f there is no spark, refer to Electronic Ignition System Diagnosis (See: Powertrain Management/Computers and Control

Systems/Testing and Inspection/Component Tests and General Diagnostics/Electronic Ignition System Diagnosis) for diagnosis of the

ignition coil.

6. Ignition OFF, remove the spark plug from the misfiring cylinder. Verify that the spark plug does not exhibit the following conditions:

* Gas, coolant, or oil fouled-Refer to Spark Plug Inspection (See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine Performance

Checks/Spark Plug/Testing and Inspection).

* Cracked, worn, incorrectly gapped-Refer to Ignition System Specifications (See: Powertrain Management/Ignition

System/Specifications).

瀚慖f there is a condition with the spark plug, replace the spark plug.

7. Exchange the suspected spark plug with another cylinder that is operating correctly.

8. Engine idling, observe the scan tool Misfire Current Counter parameters. The misfire should not follow the spark plug exchange.

瀚慖f the misfire follows the spark plug, replace the spark plug.

9. If all conditions test normal, test or inspect for the following:

* A lean or rich Q17 fuel injector-Refer to Fuel Injector Solenoid Coil Test (w/LLT) (See: Powertrain Management/Computers and

Control Systems/Testing and Inspection/Component Tests and General Diagnostics/Fuel Injector Solenoid Coil Test)Fuel Injector

Solenoid Coil Test (w/LF1) (See: Powertrain Management/Fuel Delivery and Air Induction/Fuel Injector/Testing and Inspection).

* An engine mechanical condition-Refer to Symptoms - Engine Mechanical (See: Engine, Cooling and Exhaust/Engine/Testing and

Inspection/Symptom Related Diagnostic Procedures/Symptoms - Engine Mechanical).

Repair Instructions

* Spark Plug Replacement (See: Engine, Cooling and Exhaust/Engine/Tune-up and Engine Performance Checks/Spark Plug/Service and

Repair)

* 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)

Repair Verification

1. Install any components or connectors that have been removed or replaced during diagnosis.

2. Perform any adjustment, programming, or setup procedures that are required when a component or module is removed or replaced.

3. Clear the DTCs.

4. Turn OFF the ignition for 60 s.

5. If the repair was related to a DTC, duplicate the Conditions for Running the DTC and use the Freeze Frame/Failure Records, if applicable, in

order to verify the DTC does not reset. If the DTC resets or another DTC is present, refer to Diagnostic Trouble Code (DTC) List - Vehicle

(See: Diagnostic Trouble Code Descriptions/Diagnostic Trouble Code (DTC) List - Vehicle) and perform the appropriate diagnostic

procedure.

6. To verify that the performance of the catalytic converter has not been affected by the condition that set this DTC, perform the Repair

Verification for DTC P0420 or P0430. Refer to DTC P0420 or P0430 (See: P Code Charts/P0420).

2010 Cadillac CTS Sedan AWD V6-3.6L Page 1958

2010 Cadillac CTS Sedan AWD V6-3.6L Page 1958

瀚慖f you find any of the above conditions, repair as necessary.

5. If all circuits/connections test normal, replace the appropriate HO2S.

Repair Instructions

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

* Heated Oxygen Sensor Replacement - Bank 1 Sensor 2 (LF1) (See: Powertrain Management/Computers and Control Systems/Oxygen

Sensor/Service and Repair)Heated Oxygen Sensor Replacement - Bank 1 Sensor 2 (LLT) (See: Powertrain Management/Computers and

Control Systems/Oxygen Sensor/Service and Repair)

* Heated Oxygen Sensor Replacement - Bank 2 Sensor 2 (LF1) (See: Powertrain Management/Computers and Control Systems/Oxygen

Sensor/Service and Repair)Heated Oxygen Sensor Replacement - Bank 2 Sensor 2 (LLT) (See: Powertrain Management/Computers and

Control Systems/Oxygen Sensor/Service and Repair)

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

programming

P2300

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

- Ignition Coil 1 Control Circuit

DTC P0352

- Ignition Coil 2 Control Circuit

DTC P0353

- Ignition Coil 3 Control Circuit

DTC P0354

- Ignition Coil 4 Control Circuit

DTC P0355

- Ignition Coil 5 Control Circuit

DTC P0356

- Ignition Coil 6 Control Circuit

DTC P2300

- Ignition Coil 1 Control Circuit Low Voltage

DTC P2301

- Ignition Coil 1 Control Circuit High Voltage

DTC P2303

- Ignition Coil 2 Control Circuit Low Voltage

DTC P2304

- Ignition Coil 2 Control Circuit High Voltage

DTC P2306

- Ignition Coil 3 Control Circuit Low Voltage

DTC P2307

- Ignition Coil 3 Control Circuit High Voltage