Advanced Diagnostics

DTC U0100: F-CAN Malfunction (Active Control Engine Mount (ACM)-Powertrain Control Module (PCM)) (ACM System)






General Description
The controller area network (CAN) transmits/receives pulsing signals to/from the control modules simultaneously by using two signal lines (CANH and CANL). When the information is not sent from the powertrain control module (PCM) through the F-CAN and this condition continues for a specified time or when the information sent from the PCM is abnormal and this condition continues for a specified cycle, a DTC is stored.

Monitor Execution, Sequence, Duration, DTC Type, OBD Status






Enable Conditions






Malfunction Threshold
One of these conditions occurs.
- The information is not sent from the PCM through the F-CAN for at least 4.0 seconds.
- The information sent from the PCM through the F-CAN is abnormal for at least 20 times.

Driving Pattern
Start the engine, and let it idle for at least 20 seconds.

Diagnosis Details

Conditions for illuminating the indicator
When a malfunction is detected, the DTC and the freeze frame data are stored in the PCM memory. The MIL does not come on.

Conditions for clearing the DTC
The DTC and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.