B2643

Diagnostic Chart:

Schematics:

CIRCUIT DESCRIPTION
The twilight delay switch is a potentiometer. The climate control panel (CCP) module determines the control setting based on the voltage from the twilight delay switch. The CCP module controls the head lamp automatic, on/off, and delayed off functions.

CONDITIONS FOR RUNNING THE DTC
The CCP is powered.

CONDITIONS FOR SETTING THE DTC
The feedback voltage is greater than 4.8 V for more than 2 seconds.

ACTION TAKEN WHEN THE DTC SETS
The CCP sets the twilight status to ON.

CONDITIONS FOR CLEARING THE DTC
The CCP does not detect a voltage above the predetermined value during the diagnostic self test.

TEST DESCRIPTION
The numbers below refer to the step numbers on the diagnostic table.
2. Rotate the twilight delay rheostat slowly while watching the scan tool parameter. Repeat as necessary.