B2743
DTC B2743
Circuit Description
The fog lamp switch is a momentary switch and receives voltage on from the IGN 1 fuse in the instrument panel (I/P) fuse block. The body control module (BCM) monitors the switch on the front fog lamp switch signal circuit. When the switch is pressed voltage is supplied on the front fog lamp signal circuit only while the switch is held down.
DTC Descriptor
This diagnostic procedure supports the following DTC:
DTC B2743 Fog Lamp Switch Circuit High
Conditions for Running the DTC
* The ignition switch is in the RUN position.
* The headlamp switch is in the headlamps ON or park lamps ON position.
* The fog lamps are commanded ON.
Conditions for Setting the DTC
Any of the following conditions will set this DTC:
* The front fog lamp signal circuit is shorted to voltage for 30 seconds.
* The fog lamp switch sticks closed.
Action Taken When the DTC Sets
DTC B2743 is stored in the BCM memory.
Conditions for Clearing the DTC
* The BCM receives the clear code command from the scan tool.
* A current DTC will clear when the conditions for setting the DTC are no longer present.
* A history DTC will clear after 100 malfunction-free ignition cycles.
Diagnostic Aids
If the DTC is a history DTC, the problem may be intermittent. Refer to Testing for Intermittent Conditions and Poor Connections. Component Tests and General Diagnostics
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