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

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

G1-G3:

G4-G5:

Normal Operation
The instrument cluster communicates with the scan tool through the high speed controller area network (HS-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 powertrain control module (PCM), the transmission control module (TCM), the anti-lock brake system (ABS) module, the restraints control module (RCM), the four wheel drive (4WD) control module (if equipped) and the occupant classification sensor module. The instrument cluster shares the MS-CAN network with the smart junction box (SJB), the electronic automatic temperature control (EATC) module (if equipped), the dual automatic temperature control (DATC) module (if equipped), the audio unit, the THX(R) amplifier (if equipped), the satellite radio receiver (if equipped), the driver seat module (DSM) (if equipped), the driver door module (DDM) (if equipped) and the climate controlled seat module (if equipped). Voltage for the instrument cluster is provided by circuits CBP23 (BN/YE), SBP07 (WH/RD) and CBP20 (YE/VT). Both circuits GD116 (BK/VT) provide ground.

Possible Causes
- Fuse
- Circuit CBP20 (YE/VT) open
- Circuit CBP23 (BN/YE) open
- Circuit GD116 (BK/VT) open
- Circuit SBP07 (WH/RD) open
- Circuit VDB04 (WH/BU) open (HS-CAN +)
- Circuit VDB05 (WH) open (HS-CAN -)
- Instrument cluster