Test S: The Reversing Lamps Are Inoperative

PINPOINT TEST S: THE REVERSING LAMPS ARE INOPERATIVE

S1-S3:

S3-S5:

S5-S7:

Normal Operation - Manual Transmission
The powertrain control module (PCM) sends a voltage reference signal to the reversing lamp switch through circuit 1789 (VT/WH). When the transmission is placed in REVERSE (R), the reversing lamp switch closes and routes the signal back to the PCM through circuit 359 (GY/RD). The PCM then sends a signal to the smart junction box (SJB), via the instrument cluster, over the communication network. The SJB then provides voltage to the reversing lamps. The SJB is provided voltage from the bussed electrical center (BEC) through circuit 1679 (WH/YE) to power the reversing lamps.

Normal Operation - Automatic Transmission
When the PCM detects the transmission is in REVERSE (R), a signal is sent to the SJB over the communication network. The SJB then provides voltage to the reversing lamps. The SJB is provided voltage from the BEC through circuit 1679 (WH/YE) to power the reversing lamps.

The PCM sets DTCs if any faults with the digital transmission range (TR) sensor inputs are detected.

Possible Causes
- Fuse
- Circuit 359 (GY/RD) open
- Circuit 1679 (WH/YE) open
- Circuit 1789 (VT/WH) open
- Reversing lamp switch
- BEC
- SJB
- PCM