Passive Anti-Theft Alarm System (Pats)

Inspection and Verification
1. Verify the customer's concern by duplicating the condition.
2. Inspect to determine if one of the following mechanical or electrical concerns apply:

VISUAL INSPECTION CHART

Mechanical
Damaged ignition lock cylinder
Damaged encoded ignition key
A non-encoded ignition key being used
A non-programmed encoded ignition key.

Electrical
Open fuses: Fuse junction panel
Fuse 16 (20A), Fuse 18(20A)
Inoperative transceiver module
Loose connections
Corroded connections
Damaged ignition switch

3. If inspection reveals an obvious concern that is readily serviced, correct the concern before continuing with Inspection and Verification.
4. If the concern remains after the inspection connect Rotunda New Generation Star (NGS) Tester or equivalent, to the Data Link Connector (DLC) located beneath the instrument panel to perform the Data Link Diagnostics Test. If the NGS responds with NO RESPONSE/NOT EQUIPPED for the Passive Anti-Theft System (PATS) Control Module, go to Pinpoint Test A. A: No Communication With The Module If the Data Link Diagnostic test is passed for the PATS Control Module, retrieve continuous DTCs and execute self test diagnostics for the PATS module.
5. If self test is passed and no DTCs are retrieved, go to the Symptom Chart Passive Anti-Theft Alarm System (Pats)to continue diagnostics.
6. If DTCs are retrieved, go to the PATS Control Module Diagnostic Trouble Code (DTC) Index to continue diagnostics. Passive Anti-Theft Alarm System (Pats)
7. If the PATS control module cannot be accessed by the NGS tester, go to Pinpoint Test A. A: No Communication With The Module

The Rotunda Service Bay Diagnostic System (SBDS) may also be used to diagnose this system.