Symptom Chart

WARNING: This page is about a different car, the 2007 Lincoln Mark LT and 2007 Ford Pickup. 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 ENGINES article, Section 5, pinpoint test QA before proceeding to Pinpoint Test A. If pinpoint test QA has been completed, go to Pinpoint Test A .
The anti-lock brake system (ABS) module does not respond to the scan tool	Fuse Circuitry ABS module	Go to Pinpoint Test B .
The instrument cluster does not respond to the scan tool	Fuse Circuitry Instrument cluster	Go to Pinpoint Test C .
The electronic automatic temperature control (EATC) module does not respond to the scan tool	Fuse Circuitry EATC module	Go to Pinpoint Test D .
The vehicle security module (VSM) does not respond to the scan tool	Fuse Circuitry VSM	Go to Pinpoint Test E .
The driver seat module (DSM) does not respond to the scan tool	Fuse Circuitry DSM	Go to Pinpoint Test F .
The restraints control module (RCM) does not respond to the scan tool	Fuse Circuitry RCM	Go to Pinpoint Test G .
The parking aid module does not respond to the scan tool	Fuse Circuitry Parking aid module	Go to Pinpoint Test H .
No high speed controller area network (HS-CAN) communication, all modules are not responding	Circuitry PCM ABS module Instrument cluster	Go to Pinpoint Test I .
No universal asynchronous receiver-transmitter (UART)-based protocol (UBP) network communication	Circuitry Instrument cluster EATC module (if equipped) DSM (if equipped) VSM (if equipped)	Go to Pinpoint Test J .
No International Standards Organization (ISO) 9141 network communication	Circuitry RCM Parking aid module	Go to Pinpoint Test K .
No power to the scan tool	Fuse Circuitry Scan tool	Go to Pinpoint Test L .