B2697

DTC B2697

CIRCUIT DESCRIPTION
The headlamp washer switch signal circuit is supplied a 12-volt reference through a resistor then monitored within the body control module (BCM). The headlamp washer switch is open when in an inactive state. When the headlamp washer switch is activated the signal circuit is closed to ground. When the headlamp washer switch signal circuit is closed to ground the reference voltage is dropped across the resistor within the BCM. The low voltage on the headlamp washer switch signal circuit indicates to the BCM the switch status is active.

DTC DESCRIPTOR
This diagnostic procedure supports the following DTC:

DTC B2697 Headlamp Washer Request Circuit

CONDITIONS FOR RUNNING THE DTC
- Battery voltage must be between 9-16 volts.
- The headlamp washer switch is active.

CONDITIONS FOR SETTING THE DTC
The headlamp washer switch signal to the BCM is low longer than 10 seconds.

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 DTC is current.

CONDITIONS FOR CLEARING THE DTC
- The DTC status will change form current to history when the fault is no longer present.
- A history DTC will be cleared after 100 error-free ignition cycles.

TEST DESCRIPTION

Step 1 - Step 10:

The numbers below refer to the step numbers on the diagnostic table.
2. This step verifies that the fault is current.
3. This step verifies the switch input to the BCM.
4. This step determines if the fault is in the headlamp washer switch. If the switch input to the BCM changes to an inactive state when disconnected the switch contacts are stuck or shorted to ground.