Symptom Chart

WARNING: This page is about a different car, the 2009 Ford Mustang. However, it is still accessible from the selected car via links, so may be relevant.

Symptom Chart

Condition	Possible Sources	Action
The PCM does not respond to the scan tool	Wiring, terminals or connectors 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 ABS module does not respond to the scan tool	Fuse Wiring, terminals or connectors ABS module	Go to Pinpoint Test B .
The instrument cluster (IC) does not respond to the scan tool	Fuse Wiring, terminals or connectors IC	Go to Pinpoint Test C .
The smart junction box (SJB) does not respond to the scan tool	Fuse Wiring, terminals or connectors SJB	Go to Pinpoint Test D .
The audio control module (ACM) does not respond to the scan tool	Fuse Wiring, terminals or connectors ACM	Go to Pinpoint Test E .
The satellite digital audio receiver system (SDARS) module does not respond to the scan tool	Fuse Wiring, terminals or connectors SDARS module	Go to Pinpoint Test F .
The restraints control module (RCM) does not respond to the scan tool or no ISO 9141 network communication	Fuse Wiring, terminals or connectors RCM	Go to Pinpoint Test G .
Intermittent no high speed controller area network (HS-CAN) communication, communication can be intermittently established	Wiring, terminals or connectors	Go to Pinpoint Test H .
No medium speed controller area network (MS-CAN) communication, communication can be intermittently established	Wiring, terminals or connectors SJB ACM SDARS module (if equipped) IC	Go to Pinpoint Test I .
Intermittent no high speed controller area network (HS-CAN) communication, one or more modules are not responding during network test.	Wiring, terminals or connectors	Go to Pinpoint Test J .
No high speed controller area network (HS-CAN) communication, all modules are not responding	Wiring, terminals or connectors ABS module (if equipped) IC PCM	Go to Pinpoint Test K .
No power to the scan tool	Fuse Wiring, terminals or connectors Scan tool	Go to Pinpoint Test L .