B3715

DTC B3715

CIRCUIT DESCRIPTION
The body control module (BCM) monitors the control circuit of the wiper relay. The voltage level should be low while the wiper relay is de-energized and 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 through the wiper relay control circuit to the coil side of the relay, energizing the WIPER relay. Ground is supplied at all times to the coil side of the WIPER relay from G104.

DTC DESCRIPTOR
This diagnostic procedure supports the following DTC:
DTC B3715 Front Wiper Relay Drive Circuit

CONDITIONS FOR RUNNING THE DTC
This DTC can set only when the output is actively being requested by the CPU.

CONDITIONS FOR SETTING THE DTC
If the BCM detects a short to ground or an open in the WIPER relay control circuit.

ACTION TAKEN WHEN THE DTC SETS
The BCM will not activate the output.

CONDITIONS FOR CLEARING THE DTC
- The current DTC will become history when the request for the output is removed or when the condition for setting the fault is corrected.
- The history DTC will clear after 50 consecutive ignition cycles without a fault present.

TEST DESCRIPTION

Step 1 - Step 13:

The numbers below refer to the step numbers on the diagnostic table.
3. This step tests for constant voltage in the control circuit of the wiper relay.
4. This step verifies that the BCM is applying voltage through the control circuit to the wiper relay.
5. This step tests for an open in the ground circuit of the wiper relay.