Passive Anti-Theft System (PATS) - Symptom Chart

SYMPTOM CHART

Condition	Possible Sources	Action
No communication with the powertrain control module (PCM)	Fuse(s) Circuitry PCM	REFER to MODULE COMMUNICATIONS NETWORK .
The anti-theft indicator is always/never on	Fuse(s) Circuitry Anti-theft LED Powertrain control module (PCM)	GO to PINPOINT TEST F .
The anti-theft system does not operate correctly - engine does not crank and the anti-theft LED proves out normally	Circuitry Starter relay Powertrain control module (PCM)	TURN the ignition to the OFF position and then the RUN position. CARRY OUT the PCM self-test. If PATS DTCs are present, GO to the POWERTRAIN CONTROL MODULE (PCM) DIAGNOSTIC TROUBLE CODE (DTC) INDEX .