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2010 Cadillac Truck SRX FWD V6-3.0L Page 218

2010 Cadillac Truck SRX FWD V6-3.0L Page 218



DTC Descriptor



DTC B144A 02



- RUN Power Relay Circuit Short to Ground



Diagnostic Fault Information



Circuit/System Description



The body control module (BCM) controls the ignition 1 relay through the control circuit by applying voltage to the circuit. The ignition 1 relay is



energized when the ignition switch is in ON or START, or when a remote start is requested.



Conditions for Running the DTC



* The system voltage is between 9-16 V.



* The DTC can only run when the output is activated.



Conditions for Setting the DTC



The BCM detects a short to ground in the ignition 1 relay control circuit.



Action Taken When the DTC Sets



The module output driver will be shut down and not supply voltage to the ignition 1 relay control circuit.



Conditions for Clearing the DTC



* The current DTC will clear when the module request for the output is removed or the malfunction is no longer present.



* A history DTC clears when the module ignition cycle counter reaches the reset threshold of 50, without a repeat of the malfunction.



Diagnostic Aids



Short to voltage in the ignition 1 relay control circuit will cause the malfunction indicator lamp (MIL) to illuminate with the ignition key OFF, and



the engine will remain running if started and the ignition key is removed.



Reference Information



Schematic Reference



* Body Control System Schematics (See: Body and Frame/Body Control Systems/Diagrams/Electrical Diagrams)



* 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)



Description and Operation



Power Mode Description and Operation (See: Power and Ground Distribution/Description and Operation/Power Mode)



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)



Scan Tool Reference



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

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