B3802
DTC B3802
CIRCUIT DESCRIPTION
The body control module (BCM) monitors the park lamp switch on signal circuit and the headlamp switch headlamps on signal circuit in order to determine when the park lamps and headlamps should be illuminated. When the headlamp switch is turned to PARK, the BCM senses that the park lamp switch signal on circuit is grounded and the headlamps switch headlamps ON signal circuit is open. The BCM will then energize the park lamp relay illuminating the park lamps. When the headlamp switch is turned to HEAD, the BCM senses that the park lamp switch on signal circuit and the headlamp switch headlamps ON signal circuit are grounded. The BCM will then energize the park lamp relay and headlamp low beam relay or high beam relay illuminating the park lamps and headlamps.
DTC DESCRIPTOR
This diagnostic procedure supports the following DTC:
DTC B3802 Park Lamps Request Circuit
CONDITIONS FOR RUNNING THE DTC
The battery voltage must be between 9-16 volts.
CONDITIONS FOR SETTING THE DTC
- When the headlamp switch park lamps on signal circuit is open or has a high resistance
- When the headlamp switch headlamps on signal circuit is shorted to ground
ACTION TAKEN WHEN THE DTC SETS
The park lamps will not operate or the headlamps will illuminate without the park lamps.
CONDITIONS FOR CLEARING THE MIL/DTC
- This DTC will clear on current status after the condition for setting the fault is corrected.
- A history DTC will clear after 100 consecutive ignition cycles without a fault present.
- History and current DTCs can be cleared using a scan tool.
TEST
