Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSDODGE AND RAM1992CARAVAN FWD V6-201 3.3LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTRELAYS AND MODULES - POWERTRAIN MANAGEMENTRELAYS AND MODULES - COMPUTERS AND CONTROL SYSTEMSBODY CONTROL MODULEDESCRIPTION AND OPERATIONCOMPASS MINI-TRIP COMPUTER (CMTC)
1992 Dodge and Ram Caravan FWD V6-201 3.3L
Compass Mini-Trip Computer (CMTC)
1992 Dodge and Ram Caravan FWD V6-201 3.3LSECTION Compass Mini-Trip Computer (CMTC)
The Compass/Mini-Trip module is located in the overhead console. It displays to the driver the direction the vehicle is traveling and the current outside temperature, as well as the following Traveler navigational information: average fuel economy, distance to empty (DTE), elapsed time (ET) and trip odometer (ODO). The information needed for the Traveler functions is received over the CCD bus from the body controller.
If the Compass Mini-Trip module has been replaced, it may be necessary to reset the calibration following the steps below.
TO SET THE COMPASS:
The Compass/Mini-Trip module is self-calibrated and requires no adjustment. The word CAL will be displayed to indicate that the compass is in the fast calibrating mode. CAL will turn off after the vehicle has gone in three complete circles without stopping, in an area free of magnetic disturbance.
If the module displays the temperature while the compass is blank, the vehicle must be demagnetized.
If the compass still goes blank after the vehicle is demagnetized, the Compass/Mini-Trip module must be replaced.

TO SET THE VARIANCE:
Variance is the difference between magnetic north and geographic north. To determine the variance for the area you are in, refer to the zone map provided here. The number shown for your area is the variance number for your area.
1. Set the Compass/Mini-Trip console to compass/temperature mode.
2. Press and hold down both the US/METRIC button and the STEP button for 5 seconds. (NOTE: If the buttons are held for 10 seconds instead of 5, the CMTC will set the variance to 8 and enter the fast calibration mode.)
3. The VAR light will come on and the last variance setting will be displayed.
4. Press the STEP button to set the zone number and resume normal operation.
NOTE: Do not attach any magnetic device such as a magnetic CB antenna to the vehicle. This can cause the compass to give false readings.
If the Compass Mini-Trip module has been replaced, it may be necessary to reset the calibration following the steps below.
TO SET THE COMPASS:
The Compass/Mini-Trip module is self-calibrated and requires no adjustment. The word CAL will be displayed to indicate that the compass is in the fast calibrating mode. CAL will turn off after the vehicle has gone in three complete circles without stopping, in an area free of magnetic disturbance.
If the module displays the temperature while the compass is blank, the vehicle must be demagnetized.
If the compass still goes blank after the vehicle is demagnetized, the Compass/Mini-Trip module must be replaced.
TO SET THE VARIANCE:
Variance is the difference between magnetic north and geographic north. To determine the variance for the area you are in, refer to the zone map provided here. The number shown for your area is the variance number for your area.
1. Set the Compass/Mini-Trip console to compass/temperature mode.
2. Press and hold down both the US/METRIC button and the STEP button for 5 seconds. (NOTE: If the buttons are held for 10 seconds instead of 5, the CMTC will set the variance to 8 and enter the fast calibration mode.)
3. The VAR light will come on and the last variance setting will be displayed.
4. Press the STEP button to set the zone number and resume normal operation.
NOTE: Do not attach any magnetic device such as a magnetic CB antenna to the vehicle. This can cause the compass to give false readings.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.