Test C: The Instrument Cluster Does Not Respond To The Scan Tool

PINPOINT TEST C: THE INSTRUMENT CLUSTER DOES NOT RESPOND TO THE SCAN TOOL

C1-C2:

C2-C4:

C4-C5:

Normal Operation
The instrument cluster communicates with the scan tool through the high speed controller area network (HS-CAN). Circuits 1827 (WH/LG) (HS-CAN +) and 1828 (PK/LG) (HS-CAN -) provide the HS-CAN network connection to the instrument cluster and circuits 1847 (WH/OG) (MS-CAN +) and 1848 (PK/OG) (MS-CAN -) provide the MS-CAN network connection to the instrument cluster. The instrument cluster shares the HS-CAN network with the powertrain control module (PCM), and the anti-lock brake system (ABS) module (if equipped). Voltage for the instrument cluster is provided by circuits 489 (PK/BK), 1001 (LG/RD) and 1266 (RD/YE). Circuit 1205 (BK) provides ground.

DTC U0155 - will set in other network modules when there is a loss of communication with the instrument cluster.

Possible Causes
- Fuse
- Circuit 489 (PK/BK) open
- Circuit 1001 (LG/RD) open
- Circuit 1205 (BK) open
- Circuit 1266 (RD/YE) open
- Circuit 1827 (WH/LG) open (HS-CAN +)
- Circuit 1828 (PK/LG) open (HS-CAN -)
- Instrument cluster