Grand Caravan V6-3.8L VIN L (2007)
Compass: Testing and Inspection
COMPASS MINI-TRIP COMPUTER
Any diagnosis of the compass mini-trip should begin with the use of a diagnostic scan tool. For information on the use of the scan tool, the
appropriate Diagnostic Procedures information.
Compass Mini-Trip Computer (CMTC) data is obtained from the Body Control Module (BCM) on the Programmable Communications Interface (PCI)
Data Bus circuit. The CMTC will display dashes (- -) for any of the screens it did not receive the bus messages. The label corresponding to the missing
information will be lit. If no CMTC data is displayed, check the PCI Data Bus circuit communications and the BCM. If the dimming level is improper
check the PCI Data Bus circuit.