Test T: The Fog Lamps Are On Continuously

PINPOINT TEST T: THE FOG LAMPS ARE ON CONTINUOUSLY

T1:

T2-T8:

T9:

Normal Operation
The smart junction box (SJB) sends a reference signal to the headlamp switch through circuit CLF21 (GY/VT). When the fog lamp switch is engaged, the voltage signal is routed to ground.

When the SJB detects the fog lamps on request, the SJB provides voltage to the fog lamp relay coil through circuit CLF29 (BN). When the fog lamp relay is energized, voltage is routed through circuit CLF12 (BN/YE) to the fog lamps.

DTC B2254 - is an on-demand code that sets when the SJB detects a short to ground on the fog lamp on input circuit.

Possible Causes
- Circuit CLF12 (BN/YE) short to voltage
- Circuit CLF21 (GY/VT) short to ground
- Circuit CLF29 (BN) short to voltage
- Circuit CLF28 (BN/WH) short to voltage
- Fog lamp relay
- Headlamp switch
- SJB