2010 Cadillac Truck SRX FWD V6-3.0L Page 264

2010 Cadillac Truck SRX FWD V6-3.0L Page 264

Diagnostic Instructions

* 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 B250B 01

- Driver Door Unlatch Low Control Circuit Short to Battery

DTC B250B 02

- Driver Door Unlatch Low Control Circuit Short to Ground

Diagnostic Fault Information

Circuit/System Description

When any exterior door handle is lifted, switched ground signals are sent to the keyless entry control module through the door handle switch signal

circuits. Upon receipt of these inputs, the keyless entry control module will check the door lock status of the following inputs:

* Door unlock switch activation

* Keyless entry unlock command

* Passive keyless entry unlock command message is received by the keyless entry control module

Once the enable criteria has been met, the keyless entry control module will supply power and ground to door latch control circuits and the door

will release.

Conditions for Running the DTC

Battery voltage is between 9-16 V.

Conditions for Setting the DTC

B250B 01

The keyless entry control module detects a short to battery in the driver door latch signal circuit.

B250B 02

The keyless entry control module detects a short to ground in the driver door unlatch signal circuit.

Action Taken When the DTC Sets

The passive entry feature will be inoperative for the driver door and the driver door will not open unless the door is first unlocked by pressing the

appropriate button on the keyless entry transmitter.

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

Door Lock/Indicator Schematics (See: Body and Frame/Locks/Diagrams/Electrical Diagrams/Door Lock/Indicator Schematics)

Connector End View Reference

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

Description and Operation