Pinpoint Test Ai: Abs (Anti-Lock Brake System) Module Communication Concern With Pcm (Powertrain Control Module)
Refer to: MODULE COMMUNICATIONS NETWORK for schematic and connector information.
Normal Operation and Fault Conditions
With the ignition ON, the PCM sends messages to the ABS module over the CAN. If the ABS module does not receive these messages within the specified time frame, the ABS module sets Diagnostic Trouble Codes (DTCs). This can be due to a PCM failure, a circuit failure on the CAN or an excessive load on the network. For information on the messages sent to the ABS module by the PCM, REFER to: Anti-Lock Brake System (ABS) and Stability Control - System Operation and Component Description .
DTC Fault Trigger Conditions
| DTC | Description | Fault Trigger Condition |
|---|---|---|
| ABS U0100:00 | Lost Communication With ECM/PCM "A": No Sub Type Information | Sets when the ABS module does not receive any messages from the PCM. This can be due to a PCM failure, a circuit failure on the HS-CAN or an excessive load on the network. |
| ABS U0100:82 | Lost Communication With ECM/PCM "A": Alive/Sequence Counter Incorrect/Not Updated | Sets when the ABS module receives the wheel torque data with unchanged counters from the PCM. This can be due to a PCM failure, a circuit failure on the CAN or an excessive load on the network. |
| ABS U0100:83 | Lost Communication With ECM/PCM "A": Value Of Signal Protection Calculation Incorrect | Sets when the ABS module receives the wheel torque data with invalid data from the PCM. This can be due to a PCM failure, a circuit failure on the CAN or an excessive load on the network. |
| ABS U0100:87 | Lost Communication With ECM/PCM "A": Missing Message | Sets when the ABS module does not receive any messages from the PCM. This can be due to a PCM failure, a circuit failure on the CAN or an excessive load on the network. |
| ABS U0401:81 | Invalid Data Received from ECM/PCM A: Invalid Serial Data Received | Sets if the ABS module receives invalid data in the brake pedal, accelerator pedal or clutch pedal position messages from the PCM. This can be due to a PCM failure, a circuit failure on the CAN or an excessive load on the network. |
| ABS U0401:83 | Invalid Data Received from ECM/PCM A: Value Of Signal Protection Calculation Incorrect | Sets when the ABS module receives the wheel torque data with incorrect checksum data from the PCM. This can be due to a PCM failure, a circuit failure on the CAN or an excessive load on the network. |
| ABS U0401:82 | Invalid Data Received from ECM/PCM A: Alive/Sequence Counter Incorrect/Not Updated | Sets if the ABS module receives invalid data in the driven wheel torque message or in the reverse gear message from the PCM. This can be due to a PCM failure, a circuit failure on the CAN or an excessive load on the network. |
| ABS U0401:86 | Invalid Data Received from ECM/PCM A: Signal Invalid | Sets if the ABS module is configured for one type of selectable drive mode switch and the ABS module receives a message for a different type of selectable drive mode switch. |
| ABS U0402:00 | Invalid Data Received from TCM: No Sub Type Information | sets if the ABS module is configured for one type of selectable drive mode switch and the ABS module receives a message for a different type of selectable drive mode switch. |
Possible Sources
- Network communication concern
- PCM
- GWM
Pinpoint Tests AI: ABS Module Communication Concern With PCM