Pinpoint Test Y: VDM (Vehicle Dynamics Control Module) Calibration Concern
WARNING: This page is about a different car, the 2023 Lincoln Navigator. However, it is still accessible from the selected car via links, so may be relevant.
- Normal Operation and Fault Conditions
With the Ignition ON, the VDM runs a series of internal checks. If the height sensors were not calibrated or height sensor calibration failed the VDM sets Diagnostic Trouble Codes (DTCs). After setting the DTC the VDM deactivates the dynamic suspension system resulting in a firm/harsh suspension feel and send a message to the IPC to display a dynamic suspension system warning message. REFER to: Vehicle Dynamic Suspension - System Operation and Component Description .
DTC Fault Trigger Conditions
DTC Description Fault Trigger Condition VDM C1124:55 Height Sensor(s): Not Configured This DTC is automatically set in a new VDM and indicates that the system requires height sensor calibration. Once the system is calibrated, the DTC can be cleared. VDM C1124:56 Height Sensor(s): Invalid/Incompatible Configuration This DTC sets when the height sensor voltage is out of range during VDM system height sensor calibration. Once the system is calibrated, the DTC can be cleared. Possible Sources
- VDM calibration
- Height sensor(s) damaged or improperly installed
Visual Inspection and Pre-checks
- Make sure the height sensor harness is routed correctly and is undamaged
- Make sure the height sensor electrical connector is free from any corrosion or other contaminates
- Make sure the height sensor brackets and not damaged or bent
- Y1 CHECK THE VDM (VEHICLE DYNAMICS CONTROL MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)
- Ignition ON.
- Using a diagnostic scan tool, clear the VDM Diagnostic Trouble Codes (DTCs).
- Ignition OFF.
- Ignition ON.
- Wait 30 seconds.
- Using a diagnostic scan tool, carry out the VDM self-test.
Are any non-network Diagnostic Trouble Codes (DTCs) other than C1124:55 or C1124:56 present in the VDM?
Yes DIAGNOSE all other non-network VDM Diagnostic Trouble Codes (DTCs) before continuing this test. REFER to Diagnostic Trouble Code (DTC) Chart . No CALIBRATE the VDM and height sensors using the diagnostic scan tool.