• | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
• | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
• | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
---|---|---|---|---|
Headlamp Washer Relay Voltage Supply | 1 | 1 | -- | -- |
Headlamp Washer Switch Signal | 1 | 1 | 2 | -- |
Headlamp Washer Relay Control | B3810 02 | B3810 05 | B3810 05 | -- |
Headlamp Washer Relay Ground | -- | 1 | 1 | -- |
Headlamp Washer Switch Ground | -- | 1 | 1 | -- |
1. Headlamp Washers Inoperative 2. Headlamp Washers Always ON |
The body control module (BCM) provides a high side driver output through the headlamp washer relay control circuit that controls the headlamp washer relay.
Battery voltage must be between 9-16 volts.
The BCM detects a short to ground in the headlamp washer relay control circuit.
Tthe BCM detects an open or short to voltage in the headlamp washer relay control circuit.
The BCM disables the headlamp washer function.
• | 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. |
Exterior Lighting Systems Description and Operation
⇒ | If greater than the specified range, test the ground circuit for an open/high resistance. |
⇒ | If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the BCM. |
⇒ | If the test lamp is always OFF, test the control circuit for a short to ground or open/high resistance. If the circuit tests normal, replace the BCM. |
⇒ | If the resistance is not within the specified range, replace the relay. |
• | C6 and C7 |
• | C6 and A6 |
• | C7 and A7 |
• | C7 and A6 |
⇒ | If not the specified value, replace the relay. |
⇒ | If greater than the specified range, replace the relay. |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
• | Control Module References for BCM replacement, setup, and programming |