Saturday, July 18, 2020

2010 Cadillac Truck SRX AWD V6-3.0L Page 954

2010 Cadillac Truck SRX AWD V6-3.0L Page 954



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



Ignition System Description)



Electrical Information Reference



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



Testing/Circuit Testing)



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



Procedures/Connector Repairs/Connector Repairs)



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



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



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



Repairs/Wiring Repairs)



DTC Type Reference



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



(DTC) Type Definitions)



Scan Tool Reference



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



Circuit/System Verification



1. Engine at operating temperature, all accessories OFF, and engine speed greater than 2,000 RPM, observe the Knock Retard and Total Knock



Retard parameters. The parameters should be 0掳.



2. Engine idling, move the related harnesses and connectors for the KS circuits while observing the scan tool Knock Retard and Total Knock



Retard parameters. The parameters should remain steady with no abrupt changes.



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



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



Circuit/System Testing



Note:



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



Check - Vehicle) prior to using these diagnostic procedures.



* If an engine mechanical noise can be heard, repair the condition before proceeding with this diagnostic. Refer to Symptoms - Engine



Mechanical (See: Engine, Cooling and Exhaust/Engine/Testing and Inspection/Symptom Related Diagnostic Procedures/Symptoms -



Engine Mechanical).



P0324, P0326 and P0331



1. Using a scan tool, verify DTCs P0335 or P0336 are not set.



瀚慖f any of the DTCs are set, diagnose them first. Refer to Diagnostic Trouble Code (DTC) List - Vehicle (See: Diagnostic Trouble Code



Descriptions/Diagnostic Trouble Code (DTC) List - Vehicle).



2. Verify the following conditions do not exist.



* A loose or broken vehicle accessory



* A loose or broken accessory bracket



* Excessive engine mechanical noise



瀚慖f any of the conditions exist, repair as necessary.



3. Replace the K20 ECM if no external knock sensor circuit issues exist.



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



1. Ignition OFF, disconnect the affected B68 KS.



2. Verify the affected B68 KS is properly tightened, refer to Fastener Tightening Specifications (See: Powertrain Management/Specifications).



3. Ignition OFF, with appropriate length jumper wires, connect the B68A KS1 harness to the B68B KS2 sensor and the B68B KS2 harness to



the B68A KS1 sensor.



4. Monitor the DTCs using a scan tool. Operate the vehicle within the conditions for running the DTC. Verify the fault does not follow the



sensor in question.



瀚慖f the fault follows the sensor in question, replace the appropriate B68 KS.



5. Ignition OFF, remove the jumper wires from the previous step.



6. Ignition ON, measure for 1-4 V between each of the following circuits and ground on the K20 ECM side of the harness connector:



* The B68 KS signal circuit, terminal A or 1