Test B: No Communication With The Smart Junction Box (SJB)

PINPOINT TEST B: NO COMMUNICATION WITH THE SMART JUNCTION BOX (SJB)

B1:

B1-B3:

B3 Continued:

Normal Operation
The smart junction box (SJB) fused voltage is supplied by the bussed electrical center (BEC). Circuits 1052 (TN/BK), 1523 (DG), and 1524 (DB) supply voltage to the SJB. The SJB is grounded through circuit 1205 (BK).

Possible Causes
- circuit 1052 (TN/BK) open or shorted to ground
- circuit 1523 (DG) open or shorted to ground
- circuit 1524 (DB) open or shorted to ground
- circuit 1205 (BK) open
- SJB