B3715

DTC B3715

Circuit Description

The body control module (BCM) monitors the windshield wiper switch signal 2 circuit that controls wiper ON/OFF relay. The voltage level on this circuit should be low while the wiper system is off and the relay is de-energized. The voltage will be near system voltage when the relay is energized. After the BCM receives a low, intermittent, or mist signal from the wiper/washer switch, it responds by applying battery voltage to the wiper switch signal 2 circuit energizing the wiper ON/OFF relay.

DTC Descriptor

This diagnostic procedure supports the following DTC:

DTC B3715 Front Wiper Relay Drive Circuit






Conditions for Running the DTC

The only requirements are valid operating voltage and ground.

Conditions for Setting the DTC

All of the following conditions exist for more than 1 second:

B3715 02

The BCM detects a short to ground in the windshield wiper switch signal 2 circuit when the output is active.

B3715 05

The BCM detects a short to battery or an open in the windshield wiper switch signal 2 circuit when the output is inactive.

Action Taken When the DTC Sets

B3715 02

The BCM disables the windshield wiper function.

Conditions for Clearing the DTC

* The current DTC clears when the malfunction is no longer present.
* The history DTC clears when the module ignition cycle counter reaches the reset threshold, without a repeat of the malfunction.

Test Description

Step 1 - Step 12:

Step 13:

The numbers below refer to the step numbers on the diagnostic table.
2. During the wiper ON/OFF relay operation, listen for an audible click. Command the ON and the OFF states. Repeat the commands as necessary.
3. This step tests for constant voltage in the control circuit of the wiper ON/OFF relay.
4. This step verifies that the BCM is applying voltage through the control circuit to the wiper ON/OFF relay.
5. This step tests for an open in the ground circuit of the wiper ON/OFF relay.