DTC U1204 (55), U1205 (83), U12A5 (316) (Battery Condition Monitor Module)

DTC U1204  : EP-CAN Malfunction (Battery Condition Monitor Module - PCM)

DTC U1205  : EP-CAN Malfunction (Battery Condition Monitor Module - Traction Motor Control Module)

DTC U12A5  : EP-CAN Malfunction (Battery Condition Monitor Module - Generator Motor Control 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 battery condition monitor 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 (Battery Condition Monitor Module - PCM)
   U1205 EP-CAN Malfunction (Battery Condition Monitor Module - Traction Motor Control Module)
   U12A5 EP-CAN Malfunction (Battery Condition Monitor Module - Generator Motor Control Module)

   Are any DTCs indicated?

   YES 

   The failure is duplicated. 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. Remove the service plug and the IPU cover .

   -3. U1204: Jump the SCS line with the HDS, and wait more than 1 minute.

   -4. According to the detected DTC on the following table, disconnect the transmitting control unit connector(s).

   DTC	Connector
   -	Battery condition monitor module connector E (32P)
   U1204	PCM connector A (50P)
   U1205	PCU 33P connector
   U12A5	PCU 33P connector

   -5. Measure the resistance between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	Battery condition monitor module connector E (32P): 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	Battery condition monitor module connector E (32P)	No. 11	PCM connector A (50P)	No. 21
   	EP-CAN A_L		No. 10		No. 20
   U1205	EP-CAN A_H	Battery condition monitor module connector E (32P)	No. 11	PCU 33P connector	No. 27
   	EP-CAN A_L		No. 10		No. 28
   U12A5	EP-CAN A_H	Battery condition monitor module connector E (32P)	No. 11	PCU 33P connector	No. 27
   	EP-CAN A_L		No. 10		No. 28

   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 .
   U1205	Replace the PCU .
   U12A5	Replace the PCU .

   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 battery condition monitor module.