Thursday, December 24, 2020

2010 Cadillac Truck SRX AWD V6-3.0L Page 707

2010 Cadillac Truck SRX AWD V6-3.0L 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