B3810

DTC B3810

Circuit Description
Battery positive voltage is supplied to the coil and switch sides of the rear washer and headlamp washer relays. The 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.

Conditions for Running the DTC
- Battery voltage must be between 9.0 - 16.0 volts.
- The switch status is active or inactive.

Conditions for Setting the DTC
- B3810 - The voltage on the Headlamp Washer relay control circuit is high while the relay is energized or low while the relay is de-energized.
- B3811 - The voltage on the Rear Washer relay control circuit is high while the relay is energized or low while the relay is de-energized.

Action Taken When the DTC Sets
The DTC will be current for as long as the fault is present.

Conditions for Clearing the DTC
- The DTC status will change from current to history when the fault is no longer present.
- A history will be cleared after 100 error free ignition cycles

Step 1 - 7:

Step 8 - 13:

Test Description
The numbers below refer to the step numbers on the diagnostic table.
3. 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. Tests the ability of the BCM to energize the relay.
5. Tests for a condition which causes the relay to remain energized at all times.