2010 Cadillac Truck SRX AWD V6-3.0L Page 722
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions)provides an overview of each diagnostic category.
DTC Descriptors
DTC B3887 02
- Trailer Left Turn Signal Circuit Short to Ground
DTC B3887 04
- Trailer Left Turn Signal Circuit Open
DTC B3888 02
- Trailer Right Turn Signal Circuit Short to Ground
DTC B3888 04
- Trailer Right Turn Signal Circuit Open
Diagnostic Fault Information
Circuit/System Description
When the appropriate turn signals are activated, the BCM will apply a pulsating ground to the appropriate trailer stop/turn signal lamp relay.
Conditions for Running the DTC
The system voltage is 9-16 V.
Conditions for Setting the DTC
B3887 02 or B3888 02
The BCM detects a short to ground on the appropriate trailer turn signal control circuit.
B3887 04 or B3888 04
The BCM detects an open/high resistance on the appropriate trailer turn signal control circuit
Action Taken When the DTC Sets
The appropriate trailer turn signal lamp will be inoperative.
Conditions for Clearing the DTC
* The DTC will be current for as long as the fault is present.
* When the fault is no longer present, the DTC will be a history DTC.
* A history DTC will clear after 40 ignition cycles.
Reference Information
Schematic Reference
Trailer Connector/Provision Schematics (See: Diagrams/Electrical Diagrams/Starting and Charging/Power and Ground Distribution/System
Diagram/Trailer Connector/Provision Schematics)
Connector End View Reference
Component Connector End Views (See: Diagrams/Connector Views/Connector End Views By Name)
Description and Operation
