Pinpoint Test I : U0137:87: 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.
Refer to Wiring Diagram Trailer/Camper Adapter for schematic and connector information.
Normal Operation and Fault Conditions
With the ignition ON, the TBM sends messages to the VDM over the HS-CAN2. If the VDMdoes 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 TBM, 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 |
|---|---|---|
| U0137:87 | Lost Communication With Trailer Brake Control Module: Missing Message | This DTC sets in continuous memory due to a TBM failure, a circuit failure on the HS-CAN or an excessive load on the network. |
Possible Sources
- Wiring, terminals or connectors
- Network communication concern
- Vehicle battery
- Charging system concern
- RCM