Compass Mini-Trip Computer (CMTC) Displaying "SC"
NOTE:
For connector terminal identification and wiring diagrams, see
BODY CONTROL COMPUTER - INTRODUCTION article. Perform VERIFICATION TEST VER-1A
after each repair.
NOTE:
For CMTC wiring diagram, see
ANALOG INSTRUMENT PANELS - FWD VANS article.
CAUTION:
Always turn ignition switch to OFF position prior to disconnecting any module connector.
- Disconnect ambient temperature sensor connector. Sensor is located behind front bumper (right center). Turn ignition on. 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 external ohmmeter, measure resistance between CMTC harness connector terminals No. 2 (Black/Light Blue wire) and No. 5 (Violet/Light Green wire). 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, go to next step.
- Using scan tool ohmmeter mode, measure resistance at CMTC harness connector terminal No. 5 (Violet/Light Green wire). 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, replace CMTC module.