Pinpoint Test Ar: Abs Module Communication Concern With IPC Or The Hill Descent Control Feature Is Inoperative
Normal Operation and Fault Conditions
With the ignition ON, the IPC sends messages to the GWM over the HS-CAN3. The GWM relays these messages to the ABS module over the FD-CAN. If the ABS module does not receive these messages within the allotted time frame or if the messages contain invalid data, the module sets a DTC. This can be due to a IPC failure, a circuit failure on the network or an excessive load on the network. For information on the messages sent to the ABS module by the IPC, REFER to: Anti-Lock Brake System (ABS) and Stability Control - System Operation and Component Description .
When the driver activates or deactivates the hill descent control system through the message center, the APIM sends a hill descent control message to the IPC over the HS-CAN3. The IPC then sends a message over the HS-CAN3 to the GWM which relays the hill descent message to the ABS mode over the FD-CAN. When the IPC receives the message, the module illuminates the hill descent control indicator. The ABS module takes the necessary action depending on the switch inputs and hill descent control message.
DTC Fault Trigger Conditions
| DTC | Description | Fault Trigger Condition |
|---|---|---|
| ABS U0155:00 | Lost Communication With Instrument Panel Cluster (IPC) Control Module: No Sub Type Information | This DTC sets when the ABS module does not receive any messages from the IPC within the allowed time. |
| ABS U0423:00 | Invalid Data Received from Instrument Panel Cluster Control Module: No Sub Type Information | This DTC sets when the ABS module receives messages from the IPC, but the messages contain invalid data. |
Possible Sources
- Network communication concern
- GWM
- IPC