CMTC Test 2A - Compass/Mini-Trip Computer Displaying "SC"

NOTE: Perform CMTC TEST 1A before proceeding with this test. For connector terminal identification, refer to CONNECTOR IDENTIFICATION . For wiring diagrams, refer to WIRING DIAGRAMS . Perform, after each repair, VERIFICATION TEST VER-1A - VERIFICATION PROCEDURE .

NOTE: For CMTC wiring diagram, see INSTRUMENT PANEL - ANALOG article for Dakota or see INSTRUMENT PANEL - ANALOG article for Durango.

CAUTION: Always turn ignition switch to OFF position prior to disconnecting any module connector.

Disconnect ambient temperature sensor connector. Sensor is located to the right of condenser on radiator saddle. Observe CMTC display. If CMTC displays OC, replace ambient temperature sensor. If CMTC does not display OC, go to next step.
Turn ignition off. Disconnect CMTC connector. Using an external ohmmeter, measure resistance between ground and terminal No. 3 (Violet/Light Green wire) on CMTC harness connector. If resistance is less than 5 ohms, repair Violet/Light Green wire between CMTC module and ambient temperature sensor for short to ground. If resistance is 5 ohms or more, go to next step.
Measure resistance between terminals No. 9 (Black/Light Blue wire) and No. 3 (Violet/Light Green wire) on CMTC harness connector. If resistance is less than 1000 ohms, repair Violet/Light Green wire for short to Black/Light Blue wire. If resistance is 1000 ohms or more, replace CMTC module.