Commander 4WD V8-4.7L (2008)
Compass: Testing and Inspection
REMOTE COMPASS MODULE
The Remote Compass Module (RCM) data is transferred on the Controller Area Network (CAN) Data Bus circuit. The RCM and Electronic Vehicle
Information center (EVIC) will not function properly if the bus messages are not properly received. If no EVIC data is displayed, check the CAN Data
Bus circuit communications, the RCM, the Instrument Cluster functions and the Front Control Module (FCM). Any diagnosis of the RCM and EVIC
system should begin with, the use of a scan tool and the appropriate diagnostic service information.
The use of a scan tool and the proper diagnostic procedures information are recommended for further testing of the RCM, EVIC and the CAN Data Bus
circuit.
For complete circuit diagrams, refer to the appropriate wiring information. The wiring information includes wiring diagrams, proper wire and
connector repair procedures, details of wire harness routing and retention, connector pin-out information and location views for the various wire harness
connectors, splices and grounds.
