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

NOTE: For connector terminal identification, refer to CONNECTOR IDENTIFICATION . For wiring diagrams, refer to WIRING DIAGRAMS . When directed to go to next step, disregard step if vehicle is not equipped with module being tested.

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 of steering column. Turn ignition switch to ON position. If scan tool display is not blank, go to next step. If scan tool display is blank, see VEHICLE COMMUNICATIONS .
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 VEHICLE COMMUNICATIONS . If scan tool does not display BUS FAILED or NO RESPONSE, go to next step.
Using scan tool, select SENSOR DISPLAY and read IGNITION VOLTAGE. If scan tool displays less than 10 volts, see VEHICLE COMMUNICATIONS . If scan tool displays 10 volts or greater, go to next step.
Using scan tool, select READ DTCs. If any Diagnostic Trouble Codes (fault messages) are present, go to SYMPTOM ID TEST 1B , IDENTIFYING FAULT MESSAGES. If no fault messages are present, go to SYSTEM DIAGNOSTIC TEST DIRECTORY table for specific diagnosis. Systems listed are diagnosed using a scan tool. Malfunctions in these systems 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

Compass/Mini Trip Computer (CMTC)

CMTC TEST 1A

Door Ajar System

DOOR AJAR TEST 1A

Exterior Lighting System

EXTERIOR LIGHT TEST 1A

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