Grand Caravan AWD V6-3.8L VIN L (2001)
Compass: Testing and Inspection
Compass Mini-Trip Computer (CMTC) and Compass Temperature (CT) data is obtained from the Body Control Module (BCM) on the J1850 Data Bus
circuit. The CMTC and CT 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 compass mini-trip computer data is displayed, check the J1850 Data Bus circuit communications and the BCM. If the
brightness level is improper check the J1850 Data Bus circuit.
The DRB III is recommended for checking the J1850 Data Bus circuit and the BCM. Perform the CMTC, CT self diagnosis before replacing the CMTC
or CT module.
