B2742

Diagnostic Chart (Part 1 Of 2):

Diagnostic Chart (Part 2 Of 2):

CIRCUIT DESCRIPTION
The fog lamp switch provides a direct ground input into the Body Control Module (BCM) for the fog lamp switch state input when the switch is pressed. This input is used by the BCM to control the tog lamps.

CONDITIONS FOR SETTING THE DTC
The BCM detects a short to ground in the fog lamp switch signal circuit for longer than 60 seconds.

ACTION TAKEN WHEN THE DTC SETS
^ The BCM stores DTC B2742 in memory.
^ The input and all input operations are disabled until fault is no longer detected.

CONDITIONS FOR CLEARING THE DTC
^ A current DTC B2742 will clear if the BCM no longer detects a short to ground for longer than 60 seconds.
^ A history DTC B2742 will clear after 100 consecutive ignition cycles if the condition for the malfunction is no longer present.

DIAGNOSTIC AIDS
^ If the DTC B2742 is a history DTC, the fault may be intermittent.
^ The following conditions may cause an intermittent malfunction to occur:
- An intermittent short to ground in the fog lamp switch input circuit.
- The fog lamp switch is intermittently grounded internally
- The BCM is intermittently shorted to ground internally