2010 Cadillac Truck SRX FWD V6-3.0L Page 1655

2010 Cadillac Truck SRX FWD V6-3.0L Page 1655

DTCs P0685 and P0690 are Type B DTCs.

Reference Information

Schematic Reference

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

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

* Power Distribution Schematics (See: Diagrams/Electrical Diagrams/Starting and Charging/Power and Ground Distribution/System

Diagram/Power Distribution Schematics)

Connector End View Reference

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

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)

* Electrical Center Identification Views (See: Maintenance/Fuses and Circuit Breakers/Fuse/Application and ID)

* Probing Electrical Connectors (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic

Procedures/Circuit Testing/Probing Electrical Connectors)

* 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

Note: If you were sent here from Engine Cranks But Does Not Run proceed to Circuit/System Testing.

1. Engine running, command the Engine Controls (EC) Ignition Relay ON and OFF with a scan tool while observing the following EC Ignition

Relay control circuit status parameters:

* Engine Controls Ignition Relay Control Circuit Low Voltage Test Status

* Engine Controls Ignition Relay Control Circuit Open Test Status

* Engine Controls Ignition Relay Control Circuit High Voltage Test Status

Each parameter should toggle between OK and Not Run or Not run and OK.

2. Ignition ON, view the DTC information with a scan tool. DTC P0685 or P0690 should not set.

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

1. Ignition OFF, disconnect the KR75 powertrain relay.

2. Ignition ON, verify a test lamp illuminates between both of the following relay battery voltage circuit terminals and ground.

* Terminal 86

* Terminal 87

瀚慖f the test lamp does not illuminate, test the relay battery voltage circuit for a short to ground or an open/high resistance.

Note: The ignition voltage circuit is between the powertrain relay and the ECM. The ignition voltage circuit is a feedback circuit.

3. Ignition OFF, verify that a test lamp does not illuminate between the ignition voltage circuit terminal 30 and ground.

瀚慖f the test lamp illuminates, test the ignition voltage circuit for a short to voltage.

4. Connect a 20 A fused jumper wire between the relay switch B+ circuit terminal 87 and the relay switch ignition voltage circuit terminal 30.

5. Ignition ON, observe the scan tool EC Ignition Relay Feedback Signal parameter. The ECM should communicate, and the parameter should