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 , 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 smart junction box (SJB) does not respond to the scan tool	Fuse Circuitry SJB	Go to Pinpoint Test D .
The audio unit does not respond to the scan tool	Fuse Circuitry Audio unit	Go to Pinpoint Test E .
The satellite radio receiver does not respond to the scan tool	Fuse Circuitry Satellite radio receiver	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 .
No International Standards Organization (ISO) 9141 network communication	Circuitry RCM	Go to Pinpoint Test H .
No medium speed controller area network (MS-CAN) communication, all modules are not responding	Circuitry SJB Audio unit Satellite radio receiver (if equipped) Instrument cluster	Go to Pinpoint Test I .
No high speed controller area network (HS-CAN) communication, all modules are not responding	Circuitry ABS module (if equipped) Instrument cluster PCM	Go to Pinpoint Test J .
No power to the scan tool	Fuse Circuitry Scan tool	Go to Pinpoint Test K .