2010 Cadillac Truck SRX FWD V6-3.0L Page 1437

2010 Cadillac Truck SRX FWD V6-3.0L Page 1437

DTC P0324

- Knock Sensor System Performance

DTC P0325

- Knock Sensor Circuit Bank 1

DTC P0326

- Knock Sensor Performance Bank 1

DTC P0327

- Knock Sensor Circuit Low Voltage Bank 1

DTC P0328

- Knock Sensor Circuit High Voltage Bank 1

DTC P0330

- Knock Sensor Circuit Bank 2

DTC P0331

- Knock Sensor Performance Bank 2

DTC P0332

- Knock Sensor Circuit Low Voltage Bank 2

DTC P0333

- Knock Sensor Circuit High Voltage Bank 2

DTC P06B6

- Control Module Knock Sensor Processor 1 Performance

DTC P06B7

- Control Module Knock Sensor Processor 2 Performance

Diagnostic Fault Information

Circuit/System Description

The knock sensor system enables the engine control module (ECM) to control the ignition timing for the best possible performance while protecting

the engine from potentially damaging levels of detonation. The knock sensor produces an AC voltage signal that varies depending on the vibration

level during engine operation. The ECM adjusts the spark timing based on the amplitude and the frequency of the knock sensor signal. The ECM

receives the knock sensor signal through 2 isolated signal circuits for each bank. The ECM learns a minimum knock sensor noise level for all of the

RPM range. The ECM monitors for a normal knock sensor signal. The ECM monitors the internal knock sensor processor by verifying a 20 KHz

signal generated on the output circuit is detected on the return circuit.

Conditions for Running the DTC

P0324, P0326 and P0331-Excessive Knock Detection Mode

* Engine speed is between 400-8,500 RPM.

* The engine coolant temperature (ECT) is warmer than -40掳C (-40掳F).

* The intake air temperature (IAT) is warmer than -40掳C (-40掳F).

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

P0324, P0326 and P0331-Abnormal Noise Detection Mode-Improperly Bolted Knock Sensor

* Engine speed is between 2,200-8,500 RPM.

* The ECT is warmer than -40掳C (-40掳F).

* The IAT is warmer than -40掳C (-40掳F).

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

P0325, P0327, P0328, P0330, P0332, and P0333

* Engine speed is between 400-8,500 RPM.

* The ECT is warmer than -40掳C (-40掳F).

* The IAT is warmer than -40掳C (-40掳F).

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

2010 Cadillac Truck SRX AWD V6-3.0L Page 1437

2010 Cadillac Truck SRX AWD V6-3.0L Page 1437

DTC P0324

- Knock Sensor System Performance

DTC P0325

- Knock Sensor Circuit Bank 1

DTC P0326

- Knock Sensor Performance Bank 1

DTC P0327

- Knock Sensor Circuit Low Voltage Bank 1

DTC P0328

- Knock Sensor Circuit High Voltage Bank 1

DTC P0330

- Knock Sensor Circuit Bank 2

DTC P0331

- Knock Sensor Performance Bank 2

DTC P0332

- Knock Sensor Circuit Low Voltage Bank 2

DTC P0333

- Knock Sensor Circuit High Voltage Bank 2

DTC P06B6

- Control Module Knock Sensor Processor 1 Performance

DTC P06B7

- Control Module Knock Sensor Processor 2 Performance

Diagnostic Fault Information

Circuit/System Description

The knock sensor system enables the engine control module (ECM) to control the ignition timing for the best possible performance while protecting

the engine from potentially damaging levels of detonation. The knock sensor produces an AC voltage signal that varies depending on the vibration

level during engine operation. The ECM adjusts the spark timing based on the amplitude and the frequency of the knock sensor signal. The ECM

receives the knock sensor signal through 2 isolated signal circuits for each bank. The ECM learns a minimum knock sensor noise level for all of the

RPM range. The ECM monitors for a normal knock sensor signal. The ECM monitors the internal knock sensor processor by verifying a 20 KHz

signal generated on the output circuit is detected on the return circuit.

Conditions for Running the DTC

P0324, P0326 and P0331-Excessive Knock Detection Mode

* Engine speed is between 400-8,500 RPM.

* The engine coolant temperature (ECT) is warmer than -40掳C (-40掳F).

* The intake air temperature (IAT) is warmer than -40掳C (-40掳F).

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

P0324, P0326 and P0331-Abnormal Noise Detection Mode-Improperly Bolted Knock Sensor

* Engine speed is between 2,200-8,500 RPM.

* The ECT is warmer than -40掳C (-40掳F).

* The IAT is warmer than -40掳C (-40掳F).

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

P0325, P0327, P0328, P0330, P0332, and P0333

* Engine speed is between 400-8,500 RPM.

* The ECT is warmer than -40掳C (-40掳F).

* The IAT is warmer than -40掳C (-40掳F).

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

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 2013

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 2013

* DTC P0324, P0325, P0326, P0327, P0328, P0330, P0332, or P0333 are not set.

* The engine speed is at least 400 RPM.

* The engine coolant temperature (ECT) is warmer than -40掳C (-40掳F).

* The engine run time is at least 2 s.

* The power take-off (PTO) is not active.

* DTCs P0325 and P0330 run continuously when the above conditions are met.

P0326

* DTC P0068, P0606, P1516, P2101, P2135, or P2176 are not set.

* The engine speed is at least 400 RPM.

* The MAP is at least 10 kPa.

* DTC P0324 runs continuously when the above conditions are met.

P0327, P0328, P0332, and P0333

* The engine coolant temperature (ECT) is warmer than -40掳C (-40掳F).

* The engine run time is at least 2 s.

* DTCs P0327, P0328, P0332, and P0333 run continuously when the above conditions are met.

Conditions for Setting the DTC

P0324

The ECM has detected an internal circuitry fault for 5 s.

P0325 and P0330

The KS signal circuits are open or shorted together for 5 s.

P0326

* The KS signal indicates an engine knock is present.

* The ECM has commanded the spark retard to a value, which is more than the calibrated value, for a specific engine load and speed.

* The above conditions exist for more than 5 s.

P0326

* The KS signal indicates an engine knock is present.

* The ECM has commanded the spark retard to a value, which is more than the calibrated value, for a specific engine load and speed.

* The above conditions exist for more than 5 s.

P0327, P0328, P0332, and P0333

* The KS signal circuits are shorted to voltage or ground.

* The above conditions exist for more than 5 s.

Action Taken When the DTC Sets

* DTCs P0324, P0325, P0326, P0327, P0328, P0330, P0332, and P0333 are Type B codes.

* The ignition timing is retarded to reduce the potential of engine damaging spark knock.

Conditions for Clearing the DTC

DTCs P0324, P0325, P0326, P0327, P0328, P0330, P0332, and P0333 are Type B codes.

Diagnostic Aids

* Inspect the KS for physical damage. A KS that is dropped or damaged may cause a DTC to set.

* Inspect the KS for proper installation. A KS that is loose or over torqued may cause a DTC to set.

* The KS mounting surface should be free of burrs, casting flash, and foreign material.

* The KS must be clear of hoses, brackets, and engine electrical wiring.

Reference Information

Schematic Reference

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

Connector End View Reference

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

Description and Operation

Electronic Ignition System Description (See: Powertrain Management/Computers and Control Systems/Description and Operation/Electronic

Ignition System Description)

Electrical Information Reference

2010 Cadillac Truck Escalade RWD V8-6.2L Page 2013

2010 Cadillac Truck Escalade RWD V8-6.2L Page 2013

* DTC P0324, P0325, P0326, P0327, P0328, P0330, P0332, or P0333 are not set.

* The engine speed is at least 400 RPM.

* The engine coolant temperature (ECT) is warmer than -40掳C (-40掳F).

* The engine run time is at least 2 s.

* The power take-off (PTO) is not active.

* DTCs P0325 and P0330 run continuously when the above conditions are met.

P0326

* DTC P0068, P0606, P1516, P2101, P2135, or P2176 are not set.

* The engine speed is at least 400 RPM.

* The MAP is at least 10 kPa.

* DTC P0324 runs continuously when the above conditions are met.

P0327, P0328, P0332, and P0333

* The engine coolant temperature (ECT) is warmer than -40掳C (-40掳F).

* The engine run time is at least 2 s.

* DTCs P0327, P0328, P0332, and P0333 run continuously when the above conditions are met.

Conditions for Setting the DTC

P0324

The ECM has detected an internal circuitry fault for 5 s.

P0325 and P0330

The KS signal circuits are open or shorted together for 5 s.

P0326

* The KS signal indicates an engine knock is present.

* The ECM has commanded the spark retard to a value, which is more than the calibrated value, for a specific engine load and speed.

* The above conditions exist for more than 5 s.

P0326

* The KS signal indicates an engine knock is present.

* The ECM has commanded the spark retard to a value, which is more than the calibrated value, for a specific engine load and speed.

* The above conditions exist for more than 5 s.

P0327, P0328, P0332, and P0333

* The KS signal circuits are shorted to voltage or ground.

* The above conditions exist for more than 5 s.

Action Taken When the DTC Sets

* DTCs P0324, P0325, P0326, P0327, P0328, P0330, P0332, and P0333 are Type B codes.

* The ignition timing is retarded to reduce the potential of engine damaging spark knock.

Conditions for Clearing the DTC

DTCs P0324, P0325, P0326, P0327, P0328, P0330, P0332, and P0333 are Type B codes.

Diagnostic Aids

* Inspect the KS for physical damage. A KS that is dropped or damaged may cause a DTC to set.

* Inspect the KS for proper installation. A KS that is loose or over torqued may cause a DTC to set.

* The KS mounting surface should be free of burrs, casting flash, and foreign material.

* The KS must be clear of hoses, brackets, and engine electrical wiring.

Reference Information

Schematic Reference

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

Connector End View Reference

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

Description and Operation

Electronic Ignition System Description (See: Powertrain Management/Computers and Control Systems/Description and Operation/Electronic

Ignition System Description)

Electrical Information Reference

2010 Cadillac Truck SRX AWD V6-3.0L Page 1430

2010 Cadillac Truck SRX AWD V6-3.0L Page 1430

DTC P0324

- Knock Sensor System Performance

DTC P0325

- Knock Sensor Circuit Bank 1

DTC P0326

- Knock Sensor Performance Bank 1

DTC P0327

- Knock Sensor Circuit Low Voltage Bank 1

DTC P0328

- Knock Sensor Circuit High Voltage Bank 1

DTC P0330

- Knock Sensor Circuit Bank 2

DTC P0331

- Knock Sensor Performance Bank 2

DTC P0332

- Knock Sensor Circuit Low Voltage Bank 2

DTC P0333

- Knock Sensor Circuit High Voltage Bank 2

DTC P06B6

- Control Module Knock Sensor Processor 1 Performance

DTC P06B7

- Control Module Knock Sensor Processor 2 Performance

Diagnostic Fault Information

Circuit/System Description

The knock sensor system enables the engine control module (ECM) to control the ignition timing for the best possible performance while protecting

the engine from potentially damaging levels of detonation. The knock sensor produces an AC voltage signal that varies depending on the vibration

level during engine operation. The ECM adjusts the spark timing based on the amplitude and the frequency of the knock sensor signal. The ECM

receives the knock sensor signal through 2 isolated signal circuits for each bank. The ECM learns a minimum knock sensor noise level for all of the

RPM range. The ECM monitors for a normal knock sensor signal. The ECM monitors the internal knock sensor processor by verifying a 20 KHz

signal generated on the output circuit is detected on the return circuit.

Conditions for Running the DTC

P0324, P0326 and P0331-Excessive Knock Detection Mode

* Engine speed is between 400-8,500 RPM.

* The engine coolant temperature (ECT) is warmer than -40掳C (-40掳F).

* The intake air temperature (IAT) is warmer than -40掳C (-40掳F).

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

P0324, P0326 and P0331-Abnormal Noise Detection Mode-Improperly Bolted Knock Sensor

* Engine speed is between 2,200-8,500 RPM.

* The ECT is warmer than -40掳C (-40掳F).

* The IAT is warmer than -40掳C (-40掳F).

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

P0325, P0327, P0328, P0330, P0332, and P0333

* Engine speed is between 400-8,500 RPM.

* The ECT is warmer than -40掳C (-40掳F).

* The IAT is warmer than -40掳C (-40掳F).

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