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.
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
The numbers below refer to the step numbers on the diagnostic table.
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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.
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Tests the ability of the BCM to energize the relay.
-
Tests for a condition which causes the relay to remain energized at all times.
Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Wiper/Washer Schematics Connector End View Reference: Wiper/Washer Connector End Views | |||
1 | Did you perform the Wiper/Washer System Diagnostic System Check? | Go to Step 2 | |
2 |
Does the relay turn ON and OFF with each command? | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 3 |
Does the test lamp illuminate? | Go to Step 4 | Go to Step 10 | |
Does the test lamp turn ON and OFF with each command? | Go to Step 8 | Go to Step 5 | |
Does the test lamp remain illuminated with each command? | Go to Step 7 | Go to Step 6 | |
6 | Test the control circuit of the relay for a short to voltage or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Refer to Electrical Center Identification Views in Wiring Systems for relay location. Did you find and correct the condition? | Go to Step 13 | Go to Step 9 |
7 | Test the control circuit of the relay for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Refer to Electrical Center Identification Views in Wiring Systems for relay location. Did you find and correct the condition? | Go to Step 13 | Go to Step 9 |
8 | Inspect for poor connections at the relay. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Refer to Electrical Center Identification Views in Wiring Systems for relay location. Did you find and correct the condition? | Go to Step 13 | Go to Step 11 |
9 | Inspect for poor connections at the harness connector of the body control module (BCM). Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | Go to Step 13 | Go to Step 12 |
10 | Repair the battery positive voltage circuit of the relay. Refer to Wiring Repairs in Wiring Systems. Did you complete the repair? | Go to Step 13 | -- |
11 | Replace the relay. Refer to Electrical Center Identification Views in Wiring Systems for relay location. Did you complete the replacement? | Go to Step 13 | -- |
12 |
Important: Perform the setup procedure for the BCM. Replace the BCM. Refer to Body Control Module Replacement in Body Control System. Did you complete the replacement? | Go to Step 13 | -- |
13 |
Does the DTC reset? | Go to Step 2 | System OK |
