Volt

DTC B371A

B+ voltage and ground are supplied to the windscreen wiper motor. Whenever the ignition is ON or in accessory position, the body control module (BCM) sends the wiper/washer switch status through the LIN communication bus. If a fault occurs at any time in the windscreen wiper motor, the BCM will set the DTC.

The module runs the program to detect an internal fault when power up is commanded. The only requirements are voltage and ground. This program runs even if the voltage is out of the valid operating range.

The BCM receives an invalid signal from the windscreen wiper motor.

The module refuses all additional inputs.

A current DTC clears when the diagnostic runs and passes.

Diagnose any communication DTCs (U-Codes) before attempting any diagnosis.

Schematic Reference

Wiper/Washer Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Wiper/Washer System Description and Operation

Electrical Information Reference

Scan Tool Reference

Control Module References for scan tool information

If DTC B371A is set, replace the M75 windscreen wiper motor.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Windscreen Wiper Motor Replacement