B3810

DTC B3810 OR B3811

CIRCUIT DESCRIPTION
Battery positive voltage is supplied to the coil and switch sides of the rear washer and headlamp washer relays. The body control module (BCM) energizes a relay by grounding the relay coil through the relay control circuit. When a relay is energized, the relay switch is closed and battery positive voltage is supplied to the washer pump control circuit.

DTC DESCRIPTORS
This diagnostic procedure supports the following DTCs:
- DTC B3810 Headlamp Washer Relay Circuit
- DTC B3811 Rear Washer Relay Circuit

CONDITIONS FOR RUNNING THE DTC
Battery voltage must be between 9-16 volts.

CONDITIONS FOR SETTING THE DTC

B3810
The headlamp washer relay control circuit is shorted to ground or open while the relay is de-energized, or shorted to B+ while the relay is energized.

B3811
The rear washer relay control circuit is shorted to ground or open while the relay is de-energized, or shorted to B+ while the relay is energized.

ACTION TAKEN WHEN THE DTC SETS
- The DTC will be current for as long as the fault is present.
- The headlamp washers will be disabled for as long as the B3810 is current.
- The rear washers will be disabled for as long as the B3811 is current.

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

TEST DESCRIPTION

Step 1 - Step 13:

The numbers below refer to the step numbers on the diagnostic table.
3. This step tests for battery positive voltage to the high side of the relay coil. The WASH fuse supplies power to the headlamp washer and rear washer relays.
4. This step tests the ability of the BCM to energize the relay.
5. This step tests for a condition which causes the relay to remain energized at all times.