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Symptom Id Test 1A - Identifying Vehicle Equipment & System Problems

NOTE: Perform a visual inspection before proceeding with this test.
  1. Connect scan tool to Data Link Connector (DLC). DLC is a 16-pin connector located on left side of steering column, above brake pedal. Turn ignition on. If scan tool display is not blank, go to next step. If scan tool display is blank, go to VEHICLE COMMUNICATIONS TEST 1A under VEHICLE COMMUNICATIONS.
  2. Using scan tool, select BODY SYSTEM, then BODY COMPUTER. Scan tool will perform a CCD bus test. If scan tool displays BUS OPERATIONAL, go to next step. If scan tool displays NO RESPONSE, go to VEHICLE COMMUNICATIONS TEST 3A under VEHICLE COMMUNICATIONS. If scan tool displays any other message, go to VEHICLE COMMUNICATIONS TEST 1A under VEHICLE COMMUNICATIONS.
  3. Using scan tool, select READ DTCs. If any fault messages are displayed, go to SYMPTOM ID TEST 1B  . If no fault messages are displayed, go to SYSTEM DIAGNOSTIC TEST DIRECTORY  table for specific diagnosis. Problems listed are diagnosed using a scan tool. These problems may occur separately or in various combinations. When diagnosing a system with many apparent problems, a sequence of tests may be required. At the beginning of each test a note will indicate which test to perform first. After repairs, ensure problem(s) or failure(s) have been corrected.
SYSTEM DIAGNOSTIC TEST DIRECTORY (1)

Suspected System Perform Test No.
Chime System CHIME TEST 1A6 
Compass/Mini-Trip Computer CMTC TEST 1A 
Door Ajar System DOOR AJAR TEST 1A 
Exterior Lighting System EXTERIOR LIGHTING TEST 1A 
Instrument Cluster INSTRUMENT CLUSTER TEST 1A 
Interior Lighting System INTERIOR LIGHTING TEST 1A 
Memory Seat System MEMORY SEAT TEST 1A 
Power Door Lock System POWER DOOR LOCK TEST 1A 
Power Mirror System POWER MIRROR TEST 1A 
Power Window System POWER WINDOW TEST 1A 
Vehicle Communication VEHICLE COMMUNICATION TEST 1A 
Vehicle Information Center INFORMATION CENTER TEST 1A 
Vehicle Theft Security System VTSS TEST 1A 
Windshield Wiper System WINDSHIELD WIPER TEST 1A 
(1) For problems or failures relating to air bag system, see AIR BAG RESTRAINT SYSTEM article. For automatic A/C-heater system test procedures, see A/C - HEATER SYSTEM - AUTOMATIC article or see A/C - HEATER SYSTEM - MANUAL .
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