2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 707
Distribution Relay/Service and Repair/Relay Replacement (Within an Electrical Center))
B3875
DTC B3715 or B3875
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 B3715 02
- Windshield Wiper Relay Circuit Short to Ground
DTC B3875 01
- Windshield Wiper High Speed Relay Circuit Short to Battery
DTC B3875 02
- Windshield Wiper High Speed Relay Circuit Short to Ground
DTC B3875 04
- Windshield Wiper High Speed Relay Circuit Open
Diagnostic Fault Information
Circuit/System Description
The body control module (BCM) controls the windshield wiper motor based on input from the windshield wiper/washer switch. The BCM monitors
the wiper/washer switch through two separate signal circuits and a ground circuit. The windshield wiper switch high signal circuit is used to
determine high speed wiper operation, the windshield wiper switch low signal is used to determine low speed, intermittent, and mist operation
through the use of a resistor ladder, and windshield washer switch signal circuit is used to determine washer operation.
The BCM controls the windshield wiper motor through two output controls, controlling two relays which determine the desired wiper speed, high
or low.
Conditions for Running the DTC
* The DTC runs only when a wiper output is actively being requested by the BCM.
* The system voltage is between 9-16 V.
Conditions for Setting the DTC
