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Pinpoint Test F : U0100:87: Notes

WARNING: This page is about a different car, the 2018 Lincoln Navigator. However, it is still accessible from the selected car via links, so may be relevant.

U0100:87 

Refer to Wiring Diagram Vehicle Dynamic Suspension for schematic and connector information.

Normal Operation and Fault Conditions 

With the ignition ON, the PCM sends messages to the GWM over the HS-CAN1. The GWM sends these messages to the VDM over the HS-CAN2. If the VDM does not receive these messages within a certain time frame, the module sets Diagnostic Trouble Codes (DTCs). For information on the messages sent to the VDM by the PCM, go to the Network Message Chart. REFER to: Vehicle Dynamic Suspension - System Operation and Component Description .

DTC Fault Trigger Conditions 

DTC Description Fault Trigger Conditions
U0100:87 Lost Communication With ECM / PCM: Missing Message This DTC sets in continuous memory if any one of the following messages is missing: accelerator pedal position, ambient air temperature, driven wheel torque, engine RPM data, power pack status, gear lever position or vehicle speed. This can be due to a PCM failure, a GWM failure, a circuit failure on the HS-CAN or an excessive load on the network.

Possible Sources 

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