Pinpoint Test H : U0126:87: Notes
Refer to Vehicle Dynamic Suspension for schematic and connector information.
Normal Operation and Fault Conditions
On vehicles not equipped with active park assist, with the ignition ON, the PSCM sends messages to the VDM over the HS-CAN2.
On vehicles equipped with active park assist, with the ignition ON, the SCCM sends 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 SCCM and PSCM, refer to Network Message Chart . Refer to: Vehicle Dynamic Suspension - System Operation and Component Description .
DTC Fault Trigger Conditions
| DTC | Description | Fault Trigger Conditions |
|---|---|---|
| U0126:87 | Lost Communication With SASM: Missing Message | This DTC sets in continuous memory if the steering wheel angle messages is missing. This can be due to a PSCM failure, a SCCM 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
- PSCM (vehicles without active park assist)
- SCCM (vehicles with active park assist)