2010 Cadillac Truck SRX FWD V6-3.0L Page 693

2010 Cadillac Truck SRX FWD V6-3.0L Page 693

2. Connect a test lamp between the control circuit terminal 32 and ground.

3. Ignition ON, command the Door Deadlock Lock/Unlock to LOCK with a scan tool. The test lamp should illuminate while commanding the

LOCK state.

瀚慖f the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace

the BCM.

瀚慖f the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the BCM.

4. If all circuits test normal, replace the rear fuse block.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

* Fuse Block Replacement (See: Maintenance/Fuses and Circuit Breakers/Fuse Block/Service and Repair/Removal and Replacement/Fuse

Block Replacement)

* Control Module References (See: Testing and Inspection/Programming and Relearning) for BCM replacement, setup and programming

B3810

DTC B3810

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 Descriptor

DTC B3810 02

- Headlamp Washer Relay Circuit Short to Ground

Diagnostic Fault Information

Circuit/System Description

Headlamp Washer

The Body Control Module (BCM) controls the washer motor based on an input from the windshield wiper washer switch. The BCM monitors the

washer switch through the windshield washer switch signal circuit. When the WASH switch is closed, ground is supplied to the front washer switch

signal circuit. When this is seen, the BCM will command the front washer fluid pump and the low speed wipers on. When Headlamp Wash

Equipped, the headlamps shall be sprayed with wash fluid as a result of an extended Windshield Wash Switch Activation. In order to preserve wash

fluid, the feature shall only be allowed to activate if the Low or High Beam Headlamps are active. In addition, after the initial Headlamp Wash

operation has been performed, additional headlamp washes shall not be performed for the next 4 Windshield Wash activations or for 48 hours

whichever comes first.

Conditions for Running the DTC

* Ignition ON.

* The system voltage is between 9-16 V.

Conditions for Setting the DTC

A short to ground is detected in the headlamp washer relay control circuit.