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.
2018 Ford Mustang GT, Automatic TransFACTORY OEM SERVICE PROCEDURE
Section 103 (Module Communications Network)
WARNING: This page is about a different car, the 2018 Ford Edge. However, it is still accessible from the selected car via links, so may be relevant.
- Description And Operation
- Diagnosis And Testing
- Communications Network
- DTC Chart
- 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 Anti-Lock Brake System (Abs) Module Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test C : The Restraints Control Module (RCM) Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test D : The BECMB (Battery Energy Control Module B) Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test E : The Occupant Classification System Module (OCSM) Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test F : The Steering Column Control Module (SCCM) Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test G : The Instrument Panel Cluster (IPC) Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test H : The Body Control Module (BCM) Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test I : The Direct Current/Direct Current (Dc/Dc) Converter Control Module Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test J : The Front Controls Interface Module (FCIM) Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test K : The Audio Control Module (ACM) Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test L : The Front Control/Display Interface Module (FCDIM) Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test M : The Heated Steering Wheel Module (HSWM) Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test N : The Image Processing Module A (IPMA) Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test O : The Image Processing Module B (IPMB) Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test P : The Global Positioning System Module (GPSM) Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test Q : The Accessory Protocol Interface Module (APIM) Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test R : The DSP (Audio Digital Signal Processing Module) Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test S : The Radio Transceiver Module (RTM) Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test T : The Power Steering Control Module (PSCM) Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test U : The Driver Seat Module (DSM) Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test V : The SCME (Front Seat Climate Control Module) Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test W : The Driver Door Module (DDM) Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test X : The Passenger Door Module (PDM) Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test Y : The Side Obstacle Detection Control Module LH (Sod-L) Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test Z : The Side Obstacle Detection Control Module RH (Sod-R) Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test Aa : The Cruise Control Module (CCM) Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test Ab : The Head Up Display (HUD) Module Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test Ac : The Rear Gate Trunk Module (RGTM) Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test Ad : The TRM (Trailer Module) Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test AE : The Steering Effort Control Module (SECM) Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test AF : The SASM (Steering Angle Sensor Module) Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test Ag : The Gateway Module (GWM) Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test Ah : No High Speed Controller Area Network 1 (HS-Can1) Communication, All Modules Are Not Responding
- Pinpoint Test Ai : No High Speed Controller Area Network 2 (HS-Can2) Communication, All Modules Are Not Responding
- Pinpoint Test AJ : No High Speed Controller Area Network 3 (HS-Can3) Communication, All Modules Are Not Responding
- Pinpoint Test AK : No Medium Speed Controller Area Network (Ms-Can) Communication, All Modules Are Not Responding
- Pinpoint Test Al : No Power To The Data Link Connector (DLC)
- Communications Network
- General Procedures
- Removal And Installation
Factory Service Tools
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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.