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

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

Normal Operation
The instrument cluster (IC) 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 connection to the IC and circuits VDB06 (GY/OG) (MS-CAN +) and VDB07 (VT/OG) (MS-CAN -) provide the medium speed controller area network (MS-CAN) connection to the IC. The IC shares the HS-CAN with the PCM, the transmission control module (TCM), the ABS module, the restraints control module (RCM), the 4X4 control module (if equipped) and the air suspension module (if equipped).

The IC shares the MS-CAN with the smart junction box (SJB), the electronic manual temperature control module (if equipped), the heating ventilation air conditioning (HVAC) module - electronic automatic temperature control (EATC) or heating ventilation air conditioning (HVAC) module - electronic manual temperature control (EMTC), the audio control module (ACM), the audio digital signal processing (DSP) module (if equipped), the satellite digital audio receiver system (SDARS) module (if equipped), the driver seat module (DSM) (if equipped), the dual climate control seat module (DCSM) (if equipped), the liftgate/trunk module (LTM) (if equipped), the parking aid module (PAM) (if equipped), the power running board (PRB) module (if equipped), the audio rear control unit (RCU) and the rear entertainment module (RETM).

Voltage for the IC is provided by circuits CBP29 (WH/VT) and SBP26 (YE/RD). Circuit GD133 (BK) provides ground.

This pinpoint test is intended to diagnose the following:
- Fuse
- Wiring, terminals or connectors
- IC

G1-G3:

G3-G4:

G5: