IMA System

Advanced Diagnostics - DTC U0038 (99): IMA-CAN Malfunction (BUS-OFF (Motor Control Module (MCM))) (IMA System)






General Description
The integrated motor assist-controller area network (IMA-CAN) transmits/receives pulsing signals to/from the control modules simultaneously by using two signal lines (IMACANH and IMACANL). When the motor control module (MCM) does not receive the signals via the IMA-CAN lines for a set time, a malfunction is detected and a DTC is stored.

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






Enable Conditions






Malfunction Threshold
No signals via the IMA-CAN lines are received for at least 0.5 second.

Diagnosis Details

Conditions for setting the DTC
When a malfunction is detected, the MIL comes on and a Pending DTC, a Confirmed DTC, and the freeze data are stored in the MCM memory.

Conditions for clearing the DTC
The MIL is cleared if the malfunction does not return in three consecutive trips in which the diagnostic runs. The MIL, the Pending DTC, the Confirmed DTC, and the freeze data can be cleared with the scan tool Clear command or by disconnecting the battery.