2010 Cadillac Truck SRX FWD V6-3.0L Page 722

2010 Cadillac Truck SRX FWD 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