DTC U1204 (55), U1205 (83), U12A5 (316)

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

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

DTC U12A5  : EP-CAN Malfunction (Battery Condition Monitor Module B - Generator Motor Control Module)

DTC (Electric Powertrain)

1. CAN gateway system DTC check

   -1. Turn the vehicle to the ON mode.

   -2. Check for CAN gateway system DTCs with the HDS.

   DTC Description	DTC

   DTC (CAN Gateway)

   Are any DTCs indicated?

   YES 

   Go to the troubleshooting for CAN gateway system DTC(s) .

   NO 

   Go to step 2.

2. EPP-CAN circuit communication check (Receiving control unit)

   -1. Select the Function Test in the CAN gateway with the HDS, then select the F-CAN Bus Connected Unit Check.

   F-CAN Bus Connected Unit Check

   Which result is indicated?

   Bus E is Not Available 

   Go to step 3.

   Bus E is Available 

   Go to step 5.

3. Open wire check (EPP-CAN A_H line, EPP-CAN A_L line) 1

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

   -2. Do the 12 volt battery terminal disconnection procedure .

   -3. Remove the service plug .

   -4. Disconnect the following connectors.

   IPU 33P connector

   CAN gateway 16P connector

   -5. Check for continuity between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	IPU 33P connector: disconnected
   	CAN gateway 16P connector: disconnected

   Test point 1	IPU 33P connector No. 12
   Test point 2	CAN gateway 16P connector (female terminals) No. 16:

   Test point 1	IPU 33P connector No. 13
   Test point 2	CAN gateway 16P connector (female terminals) No. 8:

   Courtesy of HONDA, U.S.A., INC.

   Is there continuity?

   YES 

   Go to step 4.

   NO 

   Repair an open in the EPP-CAN A_H wire and/or the EPP-CAN A_L wire between the IPU and the CAN gateway.

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

   -1. Remove the IPU .

   -2. Remove the IPU cover .

   -3. Disconnect the following connector.

   Battery condition monitor module B connector G (24P)

   -4. Check for continuity between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	IPU 33P connector: disconnected
   	CAN gateway 16P connector: disconnected
   	Battery condition monitor module B connector G (24P): disconnected

   Test point 1	Battery condition monitor module B connector G (24P) No. 11
   Test point 2	IPU 33P connector (male terminals) No. 12:

   Test point 1	Battery condition monitor module B connector G (24P) No. 23
   Test point 2	IPU 33P connector (male terminals) No. 13:

   Courtesy of HONDA, U.S.A., INC.

   Is there continuity?

   YES 

   The EPP-CAN A_H wire and the EPP-CAN A_L wire are OK. Check for any authorized service information related to the DTC(s) or symptoms you are troubleshooting or substitute a known-good battery condition monitor module B .

   NO 

   Repair an open in the EPP-CAN A_H wire and/or the EPP-CAN A_L wire between battery condition monitor module B and the IPU 33P connector.

5. Open wire check (EPP-CAN A_H line, EPP-CAN A_L line)

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

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

   NOTE:

   • Before disconnecting the PCM connector, jump the SCS line with the HDS, and wait for more than 1 minute.
   • Before disconnecting the PCU connector, do the 12 volt battery terminal disconnection procedure , and remove the service plug .

   DTC	Connector
   -	CAN gateway 16P connector
   U1204	PCM connector A (50P)
   U1205	PCU 33P connector
   U12A5	PCU 33P connector

   -3. Check for continuity between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	CAN gateway 16P connector: disconnected
   	Transmitting control unit connector for indicated DTC(s): disconnected

   DTC	Circuit name	Test point 1 (Receiving control unit)		Test point 2 (Transmitting control unit)
   		Connector	Terminal	Connector	Terminal
   U1204	EPP-CAN A_H	CAN gateway 16P connector (female terminals):	No. 16	PCM connector A (50P)	No. 21
   	EPP-CAN A_L		No. 8		No. 20
   U1205	EPP-CAN A_H	CAN gateway 16P connector (female terminals):	No. 16	PCU 33P connector	No. 27
   	EPP-CAN A_L		No. 8		No. 28
   U12A5	EPP-CAN A_H	CAN gateway 16P connector (female terminals):	No. 16	PCU 33P connector	No. 27
   	EPP-CAN A_L		No. 8		No. 28

   Courtesy of HONDA, U.S.A., INC.

   Is there continuity?

   YES 

   The EPP-CAN A_H wire and the EPP-CAN A_L wire are OK. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting.

   According to the detected DTC on the following table, substitute the correspond control unit.

   DTC	Operation for transmitting control unit
   U1204	Check for poor connections or loose terminals at the CAN gateway and the PCM. Substitute a known-good PCM .
   U1205	Check for poor connections or loose terminals at the CAN gateway and the PCU. Substitute a known-good PCU .
   U12A5	Check for poor connections or loose terminals at the CAN gateway and the PCU. Substitute a known-good PCU .

   NO 

   Repair an open in the EPP-CAN A_H wire and/or the EPP-CAN A_L wire between the transmitting control unit and the CAN gateway.