Test U: An Individual Reversing Lamp Is Inoperative

PINPOINT TEST U: AN INDIVIDUAL REVERSING LAMP IS INOPERATIVE

U1-U2:

U3-U4:

Normal Operation
When the transmission is placed in REVERSE, the powertrain control module (PCM) sends a signal to the smart junction box (SJB) over the communication network. The SJB then provides voltage through circuits 1362 (DG/OG) and 1367 (WH/YE) to the LH and RH reversing lamps, respectively. Ground for the lamps is provided through circuit 1205 (BK).

Possible Causes
- Circuit 1362 (DG/OG) open or short to ground
- Circuit 1367 (WH/YE) open or short to ground
- Circuit 1205 (BK) open
- SJB