Retrieving Diagnostic Trouble Codes

Before any diagnostics can be performed on the communication system, the following special service tools must be used, Rotunda New Generation STAR Tester 007-00500 or equivalent. Rotunda 73 Digital Multimeter 105-00051 or equivalent.

1. Turn ignition switch to the OFF position.
2. Locate the 16-pin Data Link Connector (DLC) test connector located under the left side of the instrument panel, to the right of the steering column.
3. Connect the New Generation STAR (NGS) Tester to the DLC test connector.
4. Connect NGS to 12 volt power source using vehicle cigar lighter socket. If vehicle is not equipped with a cigar lighter or the lighter is inoperative, use the battery adapter cable supplied with the New Generation STAR (NGS) Tester.
5. Select vehicle and year.
6. Turn the ignition switch to the RUN position.
7. At first screen press the trigger to PAGE FORWARD.
8. At the next screen, select "DIAGNOSTIC DATA LINK". Press trigger.
9. At the next screen, select "MODULE TO BE TESTED". Press trigger.
10. At the next screen, select "DIAGNOSTIC TEST MODES". Press trigger.
11. At the next screen, select "RETRIEVE/CLEAR CONTINUOUS DTCS". Press trigger.
12. At the next screen, press the "START" button.
13. At this screen, all DTCs will be displayed. Record all DTCs.
14. At this screen, cycle ignition switch to OFF position, then back to RUN position. Press trigger. All DTCs will be cleared unless there is a continuous fault.
15. Ensure the diagnostic procedures are followed step-by-step in order as indicated. Following the wrong sequence or bypassing steps will lead to unnecessary replacement of parts and/or incorrect resolution of the symptom.