Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSFORD2018EXPEDITION LIMITED, RWDREPAIR AND DIAGNOSISACCESSORIES & EQUIPMENTCOMMUNICATION DEVICESMODULE COMMUNICATIONS NETWORK (2 OF 2)
2018 Ford Expedition Limited, RWD
Module Communications Network (2 Of 2)
2018 Ford Expedition Limited, RWDSECTION Module Communications Network (2 Of 2)
- Diagnosis And Testing
- Communications Network
- DTC Chart(s)
- Symptom Chart(s)
- Pinpoint Tests
- Pinpoint Test A : The Powertrain Control Module (Pcm) Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test B : The TCM (Transmission Control Module) Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test C : The Gearshift Module (GSM) Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test D : The Anti-Lock Brake System (Abs) Module Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test E : The Vehicle Dynamics Control Module (VDM) Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test F : The Power Steering Control Module (PSCM) Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test G : The TCCM (Transfer Case Control Module) Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test H : The ATCM (All Terrain Control Module) Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test I : The DCMR (Differential Control Module Rear) Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test J : The Restraints Control Module (RCM) Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test K : The BECMB (Battery Energy Control Module B) Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test L : The Occupant Classification System Module (OCSM) Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test M : The SCCM (Steering Column Control Module) Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test N : The Instrument Panel Cluster (IPC) Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test O : The Body Control Module (BCM) Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test P : The FCIM (Front Controls Interface Module) Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test Q : The Rear Heating, Ventilation And Air Conditioning (RHVAC) Module Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test R : The Audio Front Control Module (ACM) Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test S : The Image Processing Module A (IPMA) Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test T : The Image Processing Module B (IPMB) Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test U : The Accessory Protocol Interface Module (APIM) Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test V : The Audio DSP (Audio Digital Signal Processing Module) Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test W : The TCU (TELEMATIC Control Unit Module) Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test X : The Rear Audio Control Module (RACM) Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test Y : The WACM (Wireless Accessory Charging Module) Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test Z : The RTM (Radio Transceiver Module) Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test Aa : The Driver Seat Module (DSM) Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test Ab : The Driver Door Module (DDM) Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test Ac : The Passenger Door Module (PDM) Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test Ad : The Side Obstacle Detection Control Module LH (Sod-L) Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test AE : The Side Obstacle Detection Control Module RH (Sod-R) Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test AF : The Head Up Display (HUD) Module Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test Ag : The PAM (Parking Assist Control Module) Does Not Respond To The Diagnostic Scan Tool (Active Park Assist Only)
- Pinpoint Test Ah : The DCDC (Direct Current/Direct Current Converter Control Module) (Voltage Quality Module) Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test Ai : The HSWM (Heated Steering Wheel Module) Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test AJ : The Rear Gate Trunk Module (RGTM) Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test AK : The SCMG (Driver Multi-Contour Seat Module) Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test Al : The SCMH (Passenger Multi-Contour Seat Module) Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test Am : The SCMJ (Power Fold Seat Module) Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test An : The TRM (Trailer Module) Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test AO : The TBM (Trailer Brake Control Module) Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test AP : The RBM (Running Board Control Module) Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test AQ : The Gateway Module (GWM) Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test Ar : No High Speed Controller Area Network 1 (HS-Can1) Communication, All Modules Are Not Responding
- Pinpoint Test As : No High Speed Controller Area Network 2 (HS-Can2) Communication, All Modules Are Not Responding
- Pinpoint Test At : No High Speed Controller Area Network 3 (HS-Can3) Communication, All Modules Are Not Responding
- Pinpoint Test AU : No Medium Speed Controller Area Network (Ms-Can) Communication, All Modules Are Not Responding
- Pinpoint Test Av : No Power To The Data Link Connector (DLC)
- Communications Network
- Removal And Installation
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.