Pinpoint Test D: Lost Communication With Abs Module Concern
Normal Operation and Fault Conditions
With the ignition ON, the ABS module 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 ABS module, refer to the Network Message Chart .
DTC Fault Trigger Conditions
| DTC | Description | Fault Trigger Condition |
|---|---|---|
| SECM U0121:00 | Lost Communication With Anti-Lock Brake System (ABS) Control Module "A": No Sub Type Information | Sets when the SECM detects any of the ABS module messages are missing. This can be due to a ABS module failure, a circuit failure on the HS-CAN or an excessive load on the network. |
Possible Sources
- Network communication concern
- Charging system concern
- SASM
- ABS module
- SECM
Pinpoint Tests D: Lost Communication With ABS Module Concern