Passive Anti-Theft Alarm System (Pats)

NOTE: PATS must be reconfigured upon replacement of the instrument cluster. Refer to Information Bus.

1. Verify the customer concern by operating the system.
2. Visually inspect for obvious signs of mechanical or electrical damage.

VISUAL INSPECTION CHART

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

Electrical
^ Central junction box
- Fuse 28 (10 A)
- Fuse 14 (10 A)
- Fuse 16 (10 A)
- Fuse 9 (10 A)
^ PATS transceiver
^ Circuitry
^ Ignition switch

3. If the concern remains after the inspection, connect 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 NGS Tester does not communicate with the vehicle:
^ Check that the program card is properly 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. Perform the DATA LINK DIAGNOSTIC TEST using the NGS tester. If NGS Tester responds with:
^ CKT914, CKT915 or CKT70 = ALL ECUS NO RESP/NOT EQUIP, refer to Information Bus.
^ NO RESP/NOT EQUIP for FEM, go to Pinpoint Test A. A: No Communication With the Module-Instrument Cluster
^ SYSTEM PASSED, retrieve and record the continuous Diagnostic Trouble Codes (DTCs), erase the continuous DTCs and perform 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. Instrument Cluster Diagnostic Trouble Code Index
7. If no DTCs related to the concern are retrieved, proceed to Symptom Chart to continue diagnostics. Passive Anti-Theft Alarm System (Pats)