Pinpoint Tests

PINPOINT TEST 1: THE DAYTIME RUNNING LAMPS ARE INOPERATIVE

Step 1-Step 3:

NOTE: When an excessive circuit load occurs several times, the module shuts down the output until a service procedure is performed. At the same time, the continuous DTC that was stored on the first failure will not clear by a command to clear the continuous DTCs. The module will not allow this code to be cleared or the circuit restored to normal until a successful on-demand self-test proves that the fault has been repaired. After the on-demand self-test has successfully completed (no on-demand DTCs present), the continuous DTC will have been cleared and the circuit function will return.

Normal Operation
The daytime running lamps (DRL) are controlled by the smart junction box (SJB). The SJB operates the low beam headlamps at a reduced intensity. The DRL driver (integral to the SJB) supplies pulse width modulated (PWM) voltage to the low beam head lamps.

Possible Causes
- Headlamp bulbs
- SJB