Symptom Chart

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

SYMPTOM CHART

Condition	Possible Sources	Action
The vehicle security module does not respond to the diagnostic tool	Circuit or connection in universal asynchronous receiver transmitter (UART)-based protocol (UBP) communications network Vehicle security module	GO to PINPOINT TEST A .
The powertrain control module (PCM) does not respond to the diagnostic tool	Circuit or connection in the controller area network (CAN) PCM	GO to PINPOINT TEST B .
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 C .
The driver seat module (DSM) does not respond to the diagnostic tool	Circuit or connection in the universal asynchronous receiver transmitter (UART)-based protocol (UBP) communications network DSM	GO to PINPOINT TEST D .
The parking aid module does not respond to the diagnostic tool	Circuit or connection in the international standards organization (ISO) 9141 communications network Parking aid module	GO to PINPOINT TEST E .
The instrument cluster does not respond to the diagnostic tool	Circuit or connection in the controller area network (CAN) Instrument cluster	GO to PINPOINT TEST F .
The electronic automatic temperature control (EATC) module does not respond to the diagnostic tool	Circuit or connection in the universal asynchronous receiver transmitter (UART)-based protocol (UBP) communications network EATC module	GO to PINPOINT TEST G .
The anti-lock brake system (ABS) module does not respond to the diagnostic tool	Circuit or connection in the controller area network (CAN) ABS module	GO to PINPOINT TEST H .
No controller area network (CAN) communication	Circuit or connection in the CAN CAN communications network modules	GO to PINPOINT TEST I .
No international standards organization (ISO) 9141 communications network communication	Circuit or connection in the ISO 9141 communications network ISO 9141 communications network modules	GO to PINPOINT TEST J .
No universal asynchronous receiver transmitter (UART)-based protocol (UBP) communications network communication	Circuit or connection in the UBP communications network UBP communications network modules	GO to PINPOINT TEST K .
No module/network communication - no power to the diagnostic tool	Data link connector (DLC) Central junction box (CJB) fuse 41 (20A) Circuitry Diagnostic tool	GO to PINPOINT TEST L .