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.
Pinpoint Test H: Lost Communication With RCM Concern
Normal Operation and Fault Conditions
With the ignition ON, the GWM sends messages to the SECM over the HS-CAN2 and through the SASM. If the SECM does not receive these messages within a certain time frame, the SECM sets a DTC. For information on the messages sent to the SECM by the GWM, refer to the Network Message Chart .
DTC Fault Trigger Conditions
| DTC | Description | Fault Trigger Condition |
|---|---|---|
| SECM U0151:00 | Lost Communication With Restraints Control Module: No Sub Type Information | Sets when the SECM detects any of the RCM messages are missing. This can be due to a RCM failure, a circuit failure on the HS-CAN2 or an excessive load on the network. |
Possible Sources
- Network communication concern
- Charging system concern
- SASM
- RCM
- SECM
NO RELATED
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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.