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Normal Operation and Fault Conditions

With the ignition ON, the GWM sends messages to the SECM over the HS-CAN 2 and through the SASM. If the SECM does not receive these messages within a certain time frame, the SECM sets a DTC. 

SECM DTC FAULT TRIGGER CONDITIONS

DTC Description Fault Trigger Conditions
U0146:00 Lost Communication With Gateway "A": No Sub Type Information Sets when the SECM detects any of the GWM messages is missing. This can be due to a GWM or SASM failure, a circuit failure on the HS-CAN2 or an excessive load on the network.
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