CMTC Test 1A - Identifying CMTC Problems
NOTE:
Perform SYMPTOM ID TEST 1A
before proceeding with this test. For connector terminal identification, refer to CONNECTOR IDENTIFICATION
. For wiring diagrams, refer to WIRING DIAGRAMS
. After each repair, perform TEST VER-1A
.
CAUTION:
Always turn ignition switch to OFF position prior to disconnecting any module connector. Ensure all connectors are clean and tight.
- Using scan tool, select BODY SYSTEM, then COMPASS MINI/TRIP. If scan tool displays BUS OPERATIONAL, go to next step. If scan tool displays NO RESPONSE, go to VEHICLE COMMUNICATIONS TEST 5A . If scan tool displays any other message, go to VEHICLE COMMUNICATIONS TEST 1A .
- Using scan tool, select AUTO SELF TEST. If any segments fail to light or scan tool displays FAILED, replace CMTC module. CMTC module is located behind overhead console. See Figure under CMTC TEST 6A. If AUTO SELF TEST is okay, identify problem(s) listed in CMTC DIAGNOSTIC TEST DIRECTORY table and perform indicated test(s).
CMTC DIAGNOSTIC TEST DIRECTORY
| Complaint | Perform | ||||
|---|---|---|---|---|---|
| CMTC Displays SC | CMTC TEST 2A | ||||
| CMTC Displays OC | CMTC TEST 3A | ||||
| Distance To Empty Inoperative Or Wrong | INSTRUMENT CLUSTER TEST 3A | ||||
| Incorrect Ambient Temperature Reading | CMTC TEST 4A | ||||
| Average MPG Or Fuel Economy Inoperative Or Wrong | CMTC TEST 5A | ||||
| Trip Odometer Inoperative Or Wrong | CMTC TEST 5A | ||||
| Elapsed Time Inoperative Or Wrong | (1) | ||||
| CMTC Displays CCD | (2) | ||||
| CMTC Fails To Respond To Instrument Cluster Dimming | (1) | ||||
| CMTC Button Problems | CMTC TEST 6A | ||||
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