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

Normal Operation
The instrument cluster communicates with the scan tool through the high speed controller area network (HS-CAN) and the medium speed controller area network (MS-CAN). Circuits VDB04 (WH/BU) (HS-CAN +) and VDB05 (WH) (HS-CAN -) provide the HS-CAN network connection to the instrument cluster and circuits VDB06 (GY/OG) (MS-CAN +) and VDB07 (VT/OG) (MS-CAN -) provide the MS-CAN network connection to the instrument cluster. The instrument cluster shares the HS-CAN network with the PCM, the power steering control module, the ABS module, the restraints control module (RCM), the occupant classification sensor (OCS) module and the four wheel drive (4WD) control module and shares the MS-CAN network with the electronic automatic temperature control (EATC) module, the smart junction box (SJB), the audio unit, the satellite radio receiver, the driver seat module (DSM), the power liftgate module and the digital versatile disc (DVD) player. Voltage for the instrument cluster is provided by circuits CBP29 (WH/VT) and 1566 (RD/YE). Circuit GD111 (BK/BU) provides ground.

This pinpoint test is intended to diagnose the following:
- Fuse(s)
- Wiring, terminals or connectors
- Instrument cluster

C1:

C1-C3:

C4-C5:

C5-C6: