U1205 (75)

DTC U1205 (75): IMA-CAN Malfunction (Battery Condition Monitor (BCM) Module-Motor Control Module (MCM))




General Description
The integrated motor assist-controller area network (IMA-CAN) uses two signal lines, IMACANH and IMACANL, and it receives and transmits multiple signals simultaneously to/from multiple control modules.

When the information is not sent from the motor control module (MCM) through the IMA-CAN and this condition continues for a specified time or when the information sent from the MCM is abnormal and this condition continues for a specified cycle, the battery condition monitor (BCM) module detects a malfunction and when BUS-OFF is not detected after the time to detect BUS-OFF has passed, 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 MCM through the IMA-CAN for at least 0.5 seconds and BUS-OFF is not detected after 2 seconds have passed.
- The information sent from the MCM through the IMA-CAN is abnormal at least 10 times and when BUS-OFF is not detected after 2 seconds have passed.

Diagnosis Details

Conditions for illuminating the IMA system indicator
When a malfunction is detected, the I MA system indicator comes on and the DTC and the freeze frame data are stored in the BCM memory.

Conditions for clearing the IMA system indicator
The IMA system indicator will be cleared if the malfunction does not recur during the next trip in which the diagnostic runs.

The IMA system indicator, the DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.