Normal Operation and Fault Conditions
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With the ignition ON, the PCM sends messages to the SASM through the GWM over the HSCAN 2. If the SASM does not receive these messages within a certain time frame (usually less than 1 second), the SASM sets a DTC. For information on the messages sent to the SASM by the PCM, refer to the NETWORK MESSAGE CHART in Description and Operation of Anti-Lock Brake System (ABS) and Stability Control article.
PPT AW SASM DTC FAULT TRIGGER CONDITIONS
| DTC | Description | Fault Trigger Conditions |
|---|---|---|
| U0100:00 | Lost Communication With ECM/PCM "A": No Sub Type Information | Sets in continuous memory and on-demand when the SASM detects any of the PCM messages are missing. This can be due to a PCM failure, a circuit failure on the HSCAN or an excessive load on the network. |