Operation CHARM: Car repair manuals for everyone.

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

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

Normal Operation
The IC communicates with the scan tool through the high speed controller area network (HS-CAN) and communicates with other modules on the UBP communication network. Circuits 1827 (WH/LG) (HS-CAN +) and 1828 (PK/LG) (HS-CAN -) provide the HS-CAN connection to the IC and circuit 1906 (VT) provides the UBP network connection to the IC. The IC shares the HS-CAN with the PCM and the ABS module. In addition, the IC shares the UBP network with the vehicle security module (VSM) (if equipped), the heating ventilation air conditioning (HVAC) module (if equipped) and the driver seat module (DSM) (if equipped). Voltage for the IC is provided by circuits 640 (RD/YE), 489 (PK/BK), 1003 (GY/YE) and 3049 (BK/LG). Circuits 57 (BK) and 875 (BK/LB) provide ground.

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


C1:






C2-C3:






C4-C5: