PGM/FI System

Advanced Diagnostics

DTC U0122: F-CAN Malfunction (Powertrain Control Module (PCM)-VSA Modulator-Control Unit)






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 powertrain control module (PCM) does not receive the signals via the CAN lines for a set time or more, the PCM detects a malfunction and a DTC is stored.

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






Enable Conditions






Malfunction Threshold
No signals via the CAN lines are received for at least 1 second.

Diagnosis Details

Conditions for illuminating the indicator
No signals via the CAN lines are received for at least 1 second.

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.