Tests AD: The Instrument Cluster Is Inoperative

PINPOINT TEST AD: THE INSTRUMENT CLUSTER IS INOPERATIVE

AD1:

AD1-AD3:

Normal Operation
With the ignition switch in the START or RUN position, the instrument cluster receives voltage from the smart junction box (SJB) through circuits 489 (PK/BK) and 1266 (RD/YE). With the ignition switch in the OFF position, the instrument cluster receives its keep-alive voltage from the SJB through circuit 1001 (WH/YE). The instrument cluster is grounded through circuit 1205 (BK).

DTC B1556 - is set continuous DTC and on-demand if the instrument cluster receives a network message from the SJB indicating that the ignition switch is in the RUN or START position and there is no voltage on the instrument cluster run/start circuit 489 (PK/BK).

Possible Causes
- Fuse(s)
- Circuit 489 (PK/BK) open
- Circuit 1001 (WH/YE) open
- Circuit 1205 (BK) open
- Circuit 1266 (RD/YE) open
- Instrument cluster