Test Q: The Parking, Rear Or License Plate Lamps Are On Continuously

PINPOINT TEST Q: THE PARKING, REAR OR LICENSE PLATE LAMPS ARE ON CONTINUOUSLY

Q1-Q3:

Q3-Q6:

Normal Operation
The smart junction box (SJB) provides a ground for the parking lamp relay coil when a request for the parking lamps is received. When the parking lamp relay is energized, voltage is sent through circuit CBP08 (GY/YE) to the rear and front parking lamps.

DTC B1578 - is an on-demand code that sets when the SJB detects a short to ground in the parking lamps on input circuit.

DTC B2498 - is a continuous code that sets when the SJB detects no inputs from the headlamp switch or multiple headlamp switch requests at the same time.

Possible Causes
- Circuit CBP08 (GY/YE) short to voltage
- Circuit CLS34 (GY) short to ground
- Headlamp switch
- SJB