Pinpoint Test Cl: Abs Module Communication Concern With APIM
Normal Operation and Fault Conditions
With the ignition ON, the APIM sends messages to the ABS module over the HS-CAN3 through the GWM. 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 an APIM 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 APIM, refer to Network Message Chart in the service information.
When a drive mode is selected through the FCDIM, a message is sent to the APIM indicating the selected drive mode. The APIM sends a message out to other modules along the HS-CAN3 through the GWM indicating a specific drive mode has been selected. The other modules modify their operating parameters according to the drive mode selected.
DTC Fault Trigger Conditions
| DTC | Description | Fault Trigger Condition |
|---|---|---|
| ABS P05D3:86 | Driver Mode Select Switch "A" Range/Performance: Signal Invalid | This DTC sets when the drive mode message from the APIM indicates an invalid signal. |
| ABS U0253:00 | Lost Communication With Accessory Protocol Interface Module: No Sub Type Information | This DTC sets when the ABS module has not received any messages from the APIM in the allotted time. |
| ABS U0554:00 | Invalid Data Received From Accessory Protocol Interface Module: No Sub Type Information | This DTC sets when the ABS module receives messages from the APIM, but the messages contain invalid data. |
Possible Sources
- Wiring, terminals or connectors
- Network communication concern
- APIM
Pinpoint Tests CL: ABS Module Communication Concern With APIM