DTC U1204 (95), U1206 (64) (Motor Control Module)

DTC U1204  : EP-CAN Malfunction (Traction Motor Control Module - PCM)

DTC U1206  : EP-CAN Malfunction (Traction Motor Control Module - Battery Condition Monitor Module)

NOTE: 

• Before you troubleshoot, review the general troubleshooting information .
• According to the detected DTC(s), check for the power circuit and the ground circuit of the control unit which cannot communicate with the motor control module.

DTC (Electric Powertrain)

1. Problem verification

   -1. Turn the vehicle to the ON mode.

   -2. Clear the DTC with the HDS.

   -3. Turn the vehicle to the OFF (LOCK) mode.

   -4. Turn the vehicle to the ON mode.

   -5. Check for Pending or Confirmed DTCs with the HDS.

   DTC Description	Confirmed DTC	Pending DTC	Freeze Frame
   U1204 EP-CAN Malfunction (Traction Motor Control Module - PCM)
   U1206 EP-CAN Malfunction (Traction Motor Control Module - Battery Condition Monitor Module)

   Is DTC U1204 or DTC U1206 indicated?

   YES 

   Go to step 2.

   NO 

   Intermittent failure. The system is OK at this time. If the freeze data/on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the freeze data/on-board snapshot.

2. Open wire check (EP-CAN A_H line, EP-CAN A_L line)

   -1. Turn the vehicle to the OFF (LOCK) mode.

   -2. DTC U1204: Jump the SCS line with the HDS, and wait more than 1 minute.

   -3. Do the 12 volt battery terminal disconnection procedure .

   -4. DTC U1206: Remove the service plug and the IPU cover .

   -5. Disconnect the following connectors.

   PCU 33P connector

   DTC U1204: PCM connector A (50P)

   DTC U1206: Battery condition monitor module connector E (32P)

   -6. Measure the resistance between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	PCU 33P connector: disconnected
   	Transmitting control unit connector(s) for indicated DTCs: disconnected

   DTC	Circuit name	Test point 1 (Receiving control unit)		Test point 2 (Transmitting control unit)
   		Connector	Terminal	Connector	Terminal
   U1204	EP-CAN A_H	PCU 33P connector	No. 27	PCM connector A (50P)	No. 21
   	EP-CAN A_L		No. 28		No. 20
   U1206	EP-CAN A_H	PCU 33P connector	No. 27	Battery condition monitor module connector E (32P)	No. 11
   	EP-CAN A_L		No. 28		No. 10

   Is there 1.0 Ω or less?

   YES 

   The EP-CAN A_H wire and the EP-CAN A_L wire are OK.

   According to the detected DTC on the following table, substitute, or replace the corresponding unit.

   DTC	Operation for transmitting control unit
   U1204	Replace the PCM .
   U1206	Replace the battery condition monitor module .

   NO 

   Repair an open in the EP-CAN A_H wire or the EP-CAN A_L wire between the transmitting control unit and the PCU.