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.
2021 Ford GTFACTORY OEM SERVICE PROCEDURE
Module Communications Network
- Description And Operation
- Communications Network - Overview
- Communications Network - System Operation and Component Description
- Diagnosis And Testing
- Communications Network
- GWM
- IPC
- 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 Transmission Control Module (TCM) 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 Restraints Control Module (RCM) Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test G: The BECMB (Battery Energy Control Module B) Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test H: The OCSM (Occupant Classification System Module) Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test I: The Occupant Classification System (OCS) Translator Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test J: The Steering Column Control Module (SCCM) Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test K: The Steering Angle Sensor Module (SASM) Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test L: The Instrument Panel Cluster (IPC) Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test M: The Body Control Module (BCM) Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test N: The Heating, Ventilation And Air Conditioning (HVAC) Module Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test O: The Audio Control Module (ACM) Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test P: The Accessory Protocol Interface Module (APIM) Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test Q: The TELEMATIC Control Unit Module (TCU) Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test R: The Radio Transceiver Module (RTM) Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test S: The Door Latch Control Module (DCME) Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test T: The Head Up Display (HUD) Module (Shift Indicator) Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test U: The Gateway Module (GWM) Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test V: No High Speed Controller Area Network 1 (HS-Can1) Communication, All Modules Are Not Responding
- Pinpoint Test W: No High Speed Controller Area Network 2 (HS-Can2) Communication, All Modules Are Not Responding
- Pinpoint Test X: No High Speed Controller Area Network 3 (HS-Can3) Communication, All Modules Are Not Responding
- Pinpoint Test Y: No Medium Speed Controller Area Network (Ms-Can) Communication, All Modules Are Not Responding
- Pinpoint Test Z: 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.
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