B3922

DTC B3922

Circuit Description

The body control module (BCM) monitors the windshield wiper switch low signal circuit. When the wiper switch is placed in a low position, a signal is applied to the BCM through the windshield wiper switch low signal circuit. The BCM then applies a battery positive voltage to the WIPER relay control circuit which energizes the WIPER relay, allowing the battery positive voltage from WIPER/WS fuse through the switched side of the WIPER relay to the windshield wiper motor.

DTC Descriptor

This diagnostic procedure supports the following DTC:

DTC B3922 Front Wiper Select Circuit

Conditions for Running the DTC

* The ignition switch is in the ON position.
* The ignition voltage is between 9-16 volts.

Conditions for Setting the DTC

* The BCM detects an short to battery positive voltage or a short to ground on the windshield wiper switch low signal circuit.
* The BCM detects a short to ground in the windshield wiper motor park switch signal circuit.

Action Taken When the DTC Sets

The windshield wipers will only function in the high mode.

Conditions for Clearing the DTC

* The DTC will clear on current status after the condition for setting the fault is corrected.
* A history DTC will clear after 100 consecutive ignition cycles without a fault present.
* History and current DTCs can be cleared using a scan tool.

Diagnostic Aids

Step 1 - Step 13:

Step 14:

Perform a visual inspection for loose or poor connections at all related components. refer to Testing for Intermittent Conditions and Poor Connections. Component Tests and General Diagnostics