Compass Mini-Trip Computer
WARNING: This page is about a different car, the 2005 Dodge Grand Caravan, 2005 Dodge Caravan, and 2005 Chrysler Town & Country. However, it is still accessible from the selected car via links, so may be relevant.
Any diagnosis of the compass mini-trip computer should begin with the use of the DRB III® diagnostic tool. For information on the use of the DRB III®, refer to BODY DIAGNOSTIC PROCEDURES .
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.