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 Aa : U0146:00: Notes
Normal Operation and Fault Conditions
With the ignition ON, the GWM sends messages to the SASM over the HS-CAN2. If the SASM does not receive these messages within a certain time frame (usually less than 1 second), the SASM sets Diagnostic Trouble Codes (DTCs). For information on the messages sent to the SASM by the GWM, refer to the Network Message Chart. Refer to: Anti-Lock Brake System (ABS) and Stability Control - System Operation and Component Description .
DTC Fault Trigger Conditions
| DTC | Description | Fault Trigger Conditions |
|---|---|---|
| U0146:00 | Lost Communication With Gateway "A": No Sub Type Information | This DTC sets in continuous memory and on-demand in the SASM when any of the GWM messages are missing. This can be due to a GWM failure, a circuit failure on the HS-CAN or an excessive load on the network. |
Possible Causes
- Wiring, terminals or connectors
- Network communication concern
- GWM
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.