Town Car V8-4.6L (2008)
B3-B4
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 instrument cluster (IC) 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 network connection to the IC. The IC shares the HS-CAN with the PCM, the ABS module
and the vehicle dynamics module (VDM). Voltage is supplied by circuits 1566 (RD/YE), 640 (RD/YE) and 1003 (GY/YE). Ground is supplied by
circuits 57 (BK) and 676 (PK/OG).
This pinpoint test is intended to diagnose the following:
-
Fuse
-
Wiring, terminals or connectors
-
IC
