CMTC Test 3A - Compass/Mini-Trip Computer Displaying "OC"

NOTE: Perform CMTC TEST 1A before proceeding with this test. For connector terminal identification and wiring diagrams, see appropriate sections in this article. Drive vehicle at least 3 miles (greater than 25 MPH) to update CMTC and perform VERIFICATION TEST VER-1A after each repair.

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). Connect jumper wire between connector terminals. Turn ignition on. Observe CMTC display. If CMTC displays SC, replace ambient temperature sensor. If CMTC does not display SC, go to next step.
Turn ignition off. Disconnect jumper wire. Disconnect CMTC module connector. Connect jumper wires between chassis ground and each terminal of ambient temperature sensor connector. Using scan tool in ohmmeter mode, measure resistance on CMTC module connector terminal No. 5 (Violet/Light Green wire). If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or greater, repair open Violet/Light Green wire.
With jumper wires still connected, measure resistance on CMTC module connector terminal No. 2 (Black/Light Blue wire). If resistance is less than 5 ohms, replace CMTC module. If resistance is 5 ohms or greater, repair open Black/Light Blue wire.