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 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 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 .