B3722

DTC B3722

CIRCUIT DESCRIPTION
When operation of the rear wiper is selected, battery voltage from the rear wiper switch is applied to the rear wiper switch signal input of the body control module (BCM) circuit. The BCM responds by switching the rear wiper relay control circuit to ground. This action energizes the rear wiper relay, providing power to the rear wiper motor.

DTC DESCRIPTOR
This diagnostic procedure supports the following DTC:
DTC B3722 Rear Wiper Relay Drive Circuit Low

CONDITIONS FOR RUNNING THE DTC
The ignition is in RUN or ACC position.

CONDITIONS FOR SETTING THE DTC
- The rear wiper relay control circuit is shorted to ground or open.
- The accessory voltage circuit to the coil side of the relay is open.
- The accessory voltage circuit is shorted to ground between the fuse and the rear wiper motor.
- The rear window wiper motor control circuit is shorted to ground.
- The RR WIPER 15-amp fuse is open.

ACTION TAKEN WHEN THE DTC SETS
Service (wrench) light will illuminate.

CONDITIONS FOR CLEARING THE DTC
- A current DTC clears when the fault is no longer present.
- A history DTC clears when the module ignition cycle counter reaches the reset threshold, without a repeat of the fault.

DIAGNOSTIC AIDS
- Inspect for poor connection at the BCM. Inspect harness connectors for backed out terminals, improper terminal mating, broken connector locks, improperly formed or damaged terminals and poor terminal-to-wire connection, terminal crimped over wire insulation and not conductors.
- If the rear wiper relay control circuit is open, the rear wipers will be inoperative.
- If the rear wiper relay control circuit is shorted to ground, the rear wipers will always be ON.
- If, either the accessory voltage circuit, or the rear window wiper motor control circuit is shorted to ground, the RR WIPER fuse will open and the rear wipers will be inoperative.
- Inspect the wiring harness for damage. Inspect for broken or chaffed insulation.
- If the fault is suspected to be intermittent, wiggling the harness wiring may help in locating fault.

TEST

Step 1 - Step 12:

Step 13 - Step 15: