Symptom Chart

WARNING: This page is about a different car, the 2007 Mercury Mariner and 2007 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.

Symptom Chart

Condition	Possible Sources	Action
No communication with the powertrain control module (PCM)	Fuse(s) Circuitry PCM	REFER to MODULE COMMUNICATIONS NETWORK article.
No communication with the transmission control module (TCM)	Fuse(s) Circuitry TCM	REFER to MODULE COMMUNICATIONS NETWORK article.
The anti-theft indicator is never on - no 3-second anti-theft indicator prove-out	Fuse Instrument cluster	REFER to INSTRUMENT CLUSTER article.
The anti-theft system does not operate correctly - the vehicle cranks but anti-theft indicator flashes rapidly at key ON	Incorrect TCM calibration TCM PCM	REFER to MODULE CONFIGURATION article for TCM calibration. TEST the system for normal operation. If the condition returns REFER to INTRODUCTION -- HYBRID ENGINES article.
The vehicle does not start- the anti-theft indicator does not prove out and flashes rapidly	PCM Passive anti-theft system (PATS) transceiver PATS key	Go to Pinpoint Test I .
The vehicle does not start- the anti-theft indicator proves out for 3 seconds as normal, vehicle does not crank	Starter circuit TCM	CARRY OUT the TCM diagnostics. REFER to STARTING SYSTEM article.
The vehicle does not start- the anti-theft indicator proves out for 3 seconds as normal but the engine does not remain running	Powertrain concern	CARRY OUT the powertrain diagnostics. REFER to INTRODUCTION -- HYBRID ENGINES article.
The vehicle starts and runs for longer than 1 second, then stalls	This is not a PATS issue. PATS never disables a running engine.	CARRY OUT the powertrain diagnostics. REFER to INTRODUCTION -- HYBRID ENGINES article.