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

NOTE: For connector terminal identification wiring diagrams, see BODY CONTROL COMPUTER section in this article.

NOTE: Perform a visual inspection before proceeding with this test.

Connect scan tool to Data Link Connector (DLC). DLC is a 16-pin connector located on left side kick panel, just above hood release. Turn ignition switch to ON position. If scan tool display is not blank, go to next step. If scan tool display is blank, see appropriate VEHICLE COMMUNICATIONS article.
Using scan tool, select BODY SYSTEM, then BODY COMPUTER. Scan tool will perform a CCD bus test. If scan tool displays BUS FAILED or NO RESPONSE, see appropriate VEHICLE COMMUNICATIONS article. If scan tool does not display BUS FAILED or NO RESPONSE, go to next step.
Using scan tool, select INPUT/OUTPUT and read IGN RUN/START status. If scan tool displays OPEN, go to NO RESPONSE TEST 1A. If scan tool does not display OPEN, go to next step.
Using scan tool, select READ DTCs. If any Diagnostic Trouble Codes (DTCs) are present, go to TEST 1B, IDENTIFYING FAULT MESSAGES. If no messages are present, go to SYSTEM DIAGNOSTIC TEST DIRECTORY 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 1A

Door Ajar System

DOOR AJAR TEST 1A

Exterior Lighting System

EXTERIOR LIGHT TEST 1A

Interior Lighting System

INTERIOR LIGHT TEST 1A

Instrument Cluster

INSTRUMENT CLUSTER TEST 1A

Power Door Lock System

POWER DOOR LOCK TEST 1A

Vehicle Theft Security System

VTSS TEST 1A

Windshield Wiper System

WINDSHIELD WIPER TEST 1A

⁽¹⁾	For problems or failures relating to A/C system, see the A/C-HEATER SYSTEM article. For problems or failures relating to air bag system, see AIR BAG RESTRAINT SYSTEM article in the ACCESSORIES/SAFETY EQUIPMENT section.