Symptom Chart

WARNING: This page is about a different car, the 2006 Mercury Milan, 2006 Lincoln Zephyr, and 2006 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.

SYMPTOM CHART

Condition	Possible Sources	Action
The powertrain control module (PCM) does not respond to the scan tool	Circuitry PCM	REFER to the INTRODUCTION - GASOLINE article before proceeding to Pinpoint Test A. If pinpoint test QA has been completed, GO to PINPOINT TEST A .
The transmission control module (TCM) does not respond to the diagnostic tool	Circuit or connection in the high speed controller area network (CAN) TCM	GO to PINPOINT TEST B .
The anti-lock brake system (ABS) module does not respond to the diagnostic tool	Circuit or connection in the high speed controller area network (CAN) ABS module	GO to PINPOINT TEST C .
The restraint control module (RCM) does not respond to the diagnostic tool	Circuit or connection in the high speed controller area network (CAN) RCM	GO to PINPOINT TEST D .
The occupant classification sensor does not respond to the diagnostic tool	Circuit or connection in the high speed controller area network (CAN) Occupant classification sensor	GO to PINPOINT TEST E .
The instrument cluster does not respond to the diagnostic tool	Circuit or connection in the high speed controller area network (CAN) Circuit or connection in the medium speed CAN Instrument cluster	GO to PINPOINT TEST F .
The smart junction box (SJB) does not respond to the diagnostic tool	Circuit or connection in the medium speed controller area network (CAN) SJB	GO to PINPOINT TEST G .
The driver door module (DDM) does not respond to the diagnostic tool	Circuit or connection in the medium speed controller area network (CAN) DDM	GO to PINPOINT TEST H .
The driver seat module (DSM) does not respond to the diagnostic tool	Circuit or connection in the medium speed controller area network (CAN) DSM	GO to PINPOINT TEST I .
The climate controlled seat module does not respond to the diagnostic tool	Circuit or connection in the medium speed controller area network (CAN) Climate controlled seat module	GO to PINPOINT TEST J .
The climate control assembly does not respond to the diagnostic tool	Circuit or connection in the medium speed controller area network (CAN) Dual automatic temperature control (DATC) module (if equipped) Electronic automatic temperature control (EATC) module (if equipped)	GO to PINPOINT TEST K .
The audio unit does not respond to the diagnostic tool	Circuit or connection in the medium speed controller area network (CAN) Audio unit	GO to PINPOINT TEST L .
The digital signal processing module does not respond to the diagnostic tool	Circuit or connection in the medium speed controller area network (CAN) Digital signal processing	GO to PINPOINT TEST M .
No high speed controller area network (CAN) communication	Circuit or connection in the high speed CAN High speed CAN network module	GO to PINPOINT TEST N .
No medium speed controller area network (CAN) communication	Circuit or connection in the medium speed CAN Medium speed CAN network module	GO to PINPOINT TEST O .
No module/network communication - no power to the diagnostic tool	Data link connector (DLC) C251 Fuse Circuitry Diagnostic tool	GO to PINPOINT TEST P .