B3810

DTC B3810

Circuit Description

The body control module (BCM) provides a high side drive output through the headlamp washer relay control circuit that controls the headlamp washer relay.

DTC Descriptor

This diagnostic procedure supports the following DTC:

DTC B3810 Headlamp Washer Relay 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:

B3810 02

The BCM detects a short to ground in the headlamp washer relay control circuit when the output is active.

B3810 05

The BCM detects a short to battery voltage or an open in the headlamp washer relay control circuit when the output is inactive.

Action Taken When the DTC Sets

B3810 02

The BCM disables the headlamp washer 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 11:

Step 12 - Step 13:

The numbers below refer to the step numbers on the diagnostic table.
2. During the headlamp washer fluid pump 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 headlamp washer fluid pump relay.
4. This step verifies that the BCM is applying voltage through the control circuit to the headlamp washer fluid pump relay.
5. This step tests for an open in the ground circuit of the headlamp washer fluid pump relay.