Initial Inspection and Diagnostic Overview

NOTE: PATS must be reconfigured upon installment of a new instrument cluster. Refer to Information Bus.

1. Verify the customer concern by duplicating the condition.
2. Visually inspect for obvious signs of mechanical and electrical damage.

VISUAL INSPECTION CHART

Mechanical
^ Ignition lock cylinder
^ Encoded ignition key (PATS key)
^ Use of non-en coded ignition key (key without the molded plastic head, non-PATS key)
^ Use of a non-programmed encoded ignition key

Electrical
^ Central junction box fuses:
- 5 (15 A)
- 21 (5 A)
- 34 (20 A)
^ PATS transceiver
^ Connectors
^ Ignition switch

3. If the concern remains after the inspection, connect the New Generation STAR (NGS) Tester to the data link connector located beneath the instrument panel and select the vehicle to be tested from the NGS menu. If the NGS Tester does not communicate with the vehicle:
^ check that the program card is correctly installed.
^ check the connections to the vehicle.
^ check the ignition switch position.

4. If NGS Tester still does not communicate with the vehicle, refer to the NGS Tester manual.

5. Carry out the DATA LINK DIAGNOSTIC TEST. If NGS Tester responds with:
^ CKT914, CKT915 or CKT70 = ALL ECUS NO RESP/NOT EQUIP, refer to Information Bus.
^ NO RESP/NOT EQUIP for instrument cluster, go to Pinpoint Test A. Test A: No Communication With the Instrument Cluster
^ SYSTEM PASSED, retrieve and record the continuous Diagnostic Trouble Codes (DTCs), erase the continuous DTCs and carry out self-test diagnostics for the instrument cluster.

6. If the DTCs retrieved are related to the concern, go to Instrument Cluster DTC Index to continue diagnostics. Diagnostic Trouble Code Tests and Associated Procedures
7. If no DTCs related to the concern are retrieved, proceed to Symptom Chart to continue diagnostics. Symptom Related Diagnostic Procedures