Symptom Chart

WARNING: This page is about a different car, the 2005 Ford Mustang. However, it is still accessible from the selected car via links, so may be relevant.

SYMPTOM CHART

Condition	Possible Sources	Action
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 A .
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 B .
The instrument cluster does not respond to the diagnostic tool - high speed controller area network (CAN)	Circuit or connection in the high speed CAN Instrument cluster	GO to PINPOINT TEST C .
The instrument cluster does not respond to the diagnostic tool - medium speed controller area network (CAN)	Circuit or connection in the medium speed CAN Instrument cluster	GO to PINPOINT TEST D .
The powertrain control module (PCM) does not respond to the diagnostic tool	Circuit or connection in the high speed controller area network (CAN) PCM	GO to PINPOINT TEST E .
The restraint control module (RCM) does not respond to the diagnostic tool	Circuit or connection in the international standards organization (ISO) 9141 communications network RCM	GO to PINPOINT TEST I .
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 F .
No high speed controller area network (CAN) communication	Circuit or connection in the high speed CAN High speed CAN modules	GO to PINPOINT TEST G .
No medium speed controller area network (CAN) communication	Circuit or connection in the medium speed CAN Medium speed CAN modules	GO to PINPOINT TEST H .
No international standards organization (ISO) 9141 communications network communication	Circuit or connection in the ISO 9141 communications network circuit Restraint control module (RCM)	GO to PINPOINT TEST I .
No module/network communication - no power to the diagnostic tool	Data link connector (DLC) C251 Bussed electrical center (BEC) fuse 4 (30A) Smart junction box (SJB) fuse 8 (10A) Circuitry Diagnostic tool	GO to PINPOINT TEST J .