2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 705
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 K9 BCM.
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 circuits test normal, replace
the K9 BCM.
7. If all the circuits test normal, replace the appropriate right marker lamp
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Tail Lamp Replacement (See: Lighting and Horns/Tail Lamp/Service and Repair)
* Headlamp Replacement (See: Lighting and Horns/Headlamp/Service and Repair/Removal and Replacement/Headlamp Replacement)
* Control Module References (See: Testing and Inspection/Programming and Relearning) for BCM replacement, setup and programming
B3873
DTC B3873
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 B3873 02
- Front Washer Relay Circuit Short to Ground
Diagnostic Fault Information
Circuit/System Description
The body control module (BCM) controls the windshield washer fluid pump based on an input from the turn signal/multifunction 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 the case, the BCM will command the windshield washer fluid pump and the low speed wipers on.
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 windshield washer relay control circuit.
Action Taken When the DTC Sets
Washer operation is suspended.
Conditions for Clearing the DTC
A current DTC clears when the diagnostic runs and passes.
