Pinpoint Tests

PINPOINT TEST W: THE DAYTIME RUNNING LAMPS (DRL) ARE INOPERATIVE

Normal Operation
When the ignition switch is in the RUN position, the parking brake is not applied and the headlamps are not requested on from the headlamp switch, the smart junction box (SJB) provides a pulse-width modulated (PWM) voltage to the low beam headlamps. This illuminates the headlamps at a reduced intensity.

This pinpoint test is intended to diagnose the following:
- Parking brake switch input concern
- Headlamp operation
- Ignition switch input concern
- SJB

W1-W2:

W3-W4: