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.
2023 Ford Explorer TimberlineFACTORY OEM SERVICE PROCEDURE
Section 1050 (Module Communications Network)
WARNING: This page is about a different car, the 2022 Ford Ranger. However, it is still accessible from the selected car via links, so may be relevant.
- Description And Operation
- Communications Network - Overview
- Communications Network - System Operation and Component Description
- System Diagram
- Network Termination
- Gateway Module
- High Speed Controller Area Network 1 and 2 (HS-CAN1, HS-CAN2)
- High Speed Controller Area Network 3 and 4 (HS-CAN3, HS-CAN4)
- Medium Speed Controller Area Network (MS-CAN)
- Controller Area Network (CAN) Fault Tolerance
- Controller Area Network (CAN) Multiplex Messages
- Diagnosis And Testing
- Communications Network
- Diagnostic Trouble Code (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 Front Controls Interface Module (FCIM) Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test J: The Audio Control Module (ACM) Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test K: The Image Processing Module A (IPMA) Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test L: The Accessory Protocol Interface Module (APIM) Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test M: The Audio Digital Signal Processing (DSP) Module Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test N: The TELEMATIC Control Unit Module (TCU) Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test O: The Radio Transceiver Module (RTM) Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test P: The Power Steering Control Module (PSCM) Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test Q: The Side Obstacle Detection Control Module LH (Sod-L) Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test R: The Side Obstacle Detection Control Module RH (Sod-R) Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test S: The Head Up Display (HUD) Module Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test T: The TRM (Trailer Module) Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test U: The All Terrain Control Module (ATCM) Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test V: The Direct Current/Direct Current (Dc/Dc) Converter Control Module (Voltage Quality Module) Does Not Respond To The Diagnostic Scan Tool
- Pinpoint Test W: All Networks Do Not Respond To The Diagnostic Scan Tool
- Pinpoint Test X: No High Speed Controller Area Network 1 (HS-Can1) Communication, All Modules Are Not Responding
- Pinpoint Test Y: No High Speed Controller Area Network 2 (HS-Can2) Communication, All Modules Are Not Responding
- Pinpoint Test Z: No High Speed Controller Area Network 3 (HS-Can3) Communication, All Modules Are Not Responding
- Pinpoint Test Aa: No High Speed Controller Area Network 4 (HS-Can4) Communication, All Modules Are Not Responding
- Pinpoint Test Ab: No Medium Speed Controller Area Network (Ms-Can) Communication, All Modules Are Not Responding
- Pinpoint Test Ac: No Power To The Data Link Connector (DLC)
- Pinpoint Test Ad: U3000:44, U3000:45, U3000:46, U3000:47 Or U3000:49
- Pinpoint Test AE: U2100:00
- Communications Network
- 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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