2010 Cadillac Truck SRX FWD V6-3.0L Page 1652
P0685
The ECM detects that the commanded state of the driver and the actual state of the control circuit do not match for greater than 2 s.
P0690
* The ECM detects the engine controls ignition relay feedback circuit is greater than 2 V when the relay is commanded OFF.
* The ECM detects the engine controls ignition relay feedback circuit is greater than 18 V when the relay is commanded ON.
* The condition is present for greater than 2 s.
Action Taken When the DTC Sets
DTCs P0685 and P0690 are Type B DTCs.
Conditions for Clearing the DTC
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.
