Communications Network: Notes

Symptom Chart: Communication Network

Diagnostics in this article assume a certain skill level and knowledge of Ford-specific diagnostic practices. REFER to Service Information for information regarding Ford-specific diagnostic practices.

Symptom Chart: Communication Network

Condition	Possible Sources	Actions
The vehicle does not start with the scan tool connected to the Data Link Connector (DLC) and/or multiple malfunction indicators are only on when the scan tool is connected to the DLC	Wiring, terminals or connectors Scan tool	GO to Pinpoint Test AG .
The Powertrain Control Module (PCM) does not respond to the scan tool	Wiring, terminals or connectors PCM	GO to Pinpoint Test A .
The ABS module does not respond to the scan tool	Wiring, terminals or connectors ABS module	GO to Pinpoint Test B .
The Restraints Control Module (RCM) does not respond to the scan tool	Wiring, terminals or connectors RCM	GO to Pinpoint Test C .
The Front Control/Display Interface Module (FCDIM) does not respond to the scan tool	Wiring, terminals or connectors FCDIM	GO to Pinpoint Test D .
The Occupant Classification System Module (OCSM) does not respond to the scan tool	Wiring, terminals or connectors OCSM	GO to Pinpoint Test E .
The Steering Column Control Module (SCCM) does not respond to the scan tool	Wiring, terminals or connectors SCCM	GO to Pinpoint Test G .
The Instrument Panel Cluster (IPC) does not respond to the scan tool	Wiring, terminals or connectors IPC	GO to Pinpoint Test H .
The Body Control Module (BCM) does not respond to the scan tool	Wiring, terminals or connectors BCM	GO to Pinpoint Test I .
The Heating Ventilation Air Conditioning (HVAC) module does not respond to the scan tool	Wiring, terminals or connectors HVAC module	GO to Pinpoint Test J .
The Audio Front Control Module (ACM) does not respond to the scan tool	Wiring, terminals or connectors ACM	GO to Pinpoint Test K .
The audio Digital Signal Processing (DSP) module does not respond to the scan tool	Wiring, terminals or connectors Audio DSP module	GO to Pinpoint Test L .
The Front Lighting Control Module (FLM) does not respond to the scan tool	Wiring, terminals or connectors FLM	GO to Pinpoint Test M .
The Liftgate/Trunk Module (LTM) does not respond to the scan tool	Wiring, terminals or connectors LTM	GO to Pinpoint Test N .
The Driver Seat Module (DSM) does not respond to the scan tool	Wiring, terminals or connectors DSM	GO to Pinpoint Test O .
The Global Positioning System Module (GPSM) does not respond to the scan tool	Wiring, terminals or connectors GPSM	GO to Pinpoint Test P .
The Dual Climate Controlled Seat Module (DCSM) does not respond to the scan tool	Wiring, terminals or connectors DCSM	GO to Pinpoint Test Q .
The Parking Aid Module (PAM) does not respond to the scan tool	Wiring, terminals or connectors PAM	GO to Pinpoint Test R .
The Accessory Protocol Interface Module (APIM) does not respond to the scan tool	Wiring, terminals or connectors APIM	GO to Pinpoint Test S .
The Head Up Display (HUD) module does not respond to the scan tool	Wiring, terminals or connectors HUD module	GO to Pinpoint Test T .
The Cruise-Control Module (C-CM) does not respond to the scan tool	Wiring, terminals or connectors C-CM	GO to Pinpoint Test U .
The Side Obstacle Detection Control Module - Left (SOD-L) does not respond to the scan tool	Wiring, terminals or connectors SOD-L	GO to Pinpoint Test V .
The Side Obstacle Detection Control Module - Right (SOD-R) does not respond to the scan tool	Wiring, terminals or connectors SOD-R	GO to Pinpoint Test W .
The Radio Transceiver Module (RTM) does not respond to the scan tool	Wiring, terminals or connectors Radio Transceiver Module (RTM)	GO to Pinpoint Test X .
The Front Controls Interface Module (FCIM) does not respond to the scan tool	Wiring, terminals or connectors FCIM	GO to Pinpoint Test Y .
The Remote Function Actuator (RFA) module does not respond to the scan tool	Wiring, terminals or connectors RFA module	GO to Pinpoint Test Z .
The All Terrain Control Module (ATCM) does not respond to the scan tool	Wiring, terminals or connectors ATCM	GO to Pinpoint Test AA .
The Power Steering Control Module (PSCM) does not respond to the scan tool	Wiring, terminals or connectors PSCM	GO to Pinpoint Test AC .
The Transmission Control Module (TCM) does not respond to the scan tool	Wiring, terminals or connectors TCM	GO to Pinpoint Test AB .
The Heated Steering Wheel Module (HSWM) does not respond to the scan tool	Wiring, terminals or connectors HSWM	GO to Pinpoint Test AL .
The Image Processing Module - A (IPM-A) does not respond to the scan tool	Wiring, terminals or connectors IPM-A	GO to Pinpoint Test AM .
The Generic Function Module (GFM) does not respond to the scan tool	Wiring, terminals or connectors GFM	GO to Pinpoint Test AN .
No HS-CAN communication, all modules are not responding	Wiring, terminals or connectors DLC APIM (if equipped) ATCM (if equipped) ABS module BCM C-CM (if equipped) GFM (if equipped) HUD module (if equipped) IPM-A (if equipped) IPC OCSM PAM (if equipped) PSCM PCM RCM SCCM TCM (if equipped)	GO to Pinpoint Test AD .
No MS-CAN communication, all modules are not responding	Wiring, terminals or connectors DLC APIM (if equipped) BCM (if equipped) DSM (if equipped) DCSM (if equipped) HSWM (if equipped) HVAC module GPSM (if equipped) LTM (if equipped) RFA module (if equipped) SOD-L (if equipped) SOD-R (if equipped) Radio Transceiver Module (RTM)	GO to Pinpoint Test AE .
No I-CAN communication, all modules are not responding	Wiring, terminals or connectors DLC APIM (if equipped) ACM Audio DSP module (if equipped) FCIM (if equipped) FCDIM (if equipped) IPC	If the IPC does not pass a network test, DIAGNOSE IPC first. GO to Pinpoint Test H . GO to Pinpoint Test AF .
No power to the DLC	Fuse Wiring, terminals or connectors DLC Scan tool	GO to Pinpoint Test AG .