DLC Circuit Troubleshooting (Electric Powertrain)

NOTE:  If you suspect the HDS or the HDS DLC cable may be the source of the communication problem, verify that they are working properly by connecting them to a known-good vehicle and system and checking for communication problems.

1. Fuse check 1

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

   -2. Check the following fuse.

   Fuse

   No. A10

   Is the fuse OK?

   YES 

   Go to step 2.

   NO 

   Replace the No. A10 fuse. Also check for a short to ground on the No. A10 fuse circuit if needed.

2. Fuse check 2

   -1. Check the following fuse.

   Fuse

   No. D3

   Is the fuse OK?

   YES 

   Go to step 3.

   NO 

   Replace the No. D3 fuse. Also check for a short to ground on the No. D3 fuse circuit if needed.

3. Open wire check (PG line)

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

   -2. Remove the service plug .

   -3. Remove the IPU cover .

   -4. Disconnect the following connector.

   Battery condition monitor module connector E (32P)

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

   Test condition	Vehicle OFF (LOCK) mode
   	Battery condition monitor module connector E (32P): disconnected
   Test point 1	Battery condition monitor module connector E (32P) No. 17
   Test point 2	Body ground

   Is there 1. 0 Ω or less?

   YES 

   Go to step 4

   NO 

   Repair an open in the PG wire between the battery condition monitor module and G701.

4. Open wire check (IG1MONI line)

   -1. Reconnect the following connector.

   Battery condition monitor module connector E (32P)

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

   -3. Turn the vehicle to the ON mode.

   -4. Measure the voltage between test points 1 and 2.

   Test condition

   Vehicle ON mode

   Test point 1	Battery condition monitor module connector E (32P) No. 7
   Test point 2	Body ground

   Is there battery voltage?

   YES 

   Go to step 5

   NO 

   Repair an open in the IG1MONI wire between the No. D3 fuse and the battery condition monitor module.

5. Open wire check (IGAMONI line)

   -1. Measure the voltage between test points 1 and 2.

   Test condition	Vehicle ON mode
   Test point 1	Battery condition monitor module connector E (32P) No. 23
   Test point 2	Body ground

   Is there battery voltage?

   YES 

   Go to step 6

   NO 

   Go to step 8.

6. Open wire check (F-CAN A_H line, F-CAN A_L line)

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

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

   -3. Disconnect the following connectors.

   CAN gateway 16P connector

   Battery condition monitor module connector E (32P)

   -4. Measure the resistance between test points 1 and 2 respectively.

   Test condition	Vehicle OFF (LOCK) mode
   	CAN gateway 16P connector: disconnected
   	Battery condition monitor module connector E (32P): disconnected
   Test point 1	CAN gateway 16P connector (female terminals) No. 3:
   Test point 2	Battery condition monitor module connector E (32P) No. 9

   Test point 1	CAN gateway 16P connector (female terminals) No. 11:
   Test point 2	Battery condition monitor module connector E (32P) No. 8

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

   Is there 1. 0 Ω or less?

   YES 

   Go to step 7.

   NO 

   Repair an open or poor connection in the F-CAN A_H wire or F-CAN A_L between the CAN gateway and the battery condition monitor module.

7. Shorted wire check (F-CAN A_H line, F-CAN A_L line)

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

   Test condition	Vehicle OFF (LOCK) mode
   	CAN gateway 16P connector: disconnected
   	Battery condition monitor module connector E (32P): disconnected
   Test point 1	Battery condition monitor module connector E (32P) No. 9
   Test point 2	Body ground

   Test point 1	Battery condition monitor module connector E (32P) No. 8
   Test point 2	Body ground

   Is there 1 MΩ or more?

   YES 

   The F-CAN A wires are OK. Replace the battery condition monitor module .

   NO 

   Repair a short in the F-CAN A_H wire or F-CAN A_L wire between the CAN gateway and the battery condition monitor module.

8. Relay check

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

   -2. Remove the IGHLD1 relay .

   -3. Test the IGHLD1 relay .

   Is the relay OK?

   YES 

   Go to step 9.

   NO 

   Replace the IGHLD1 relay.

9. Open wire check (+B_IG_HOLD1 line)

   -1. Measure the voltage between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	IGHLD1 relay: disconnected
   Test point 1	IGHLD1 relay 4P socket (female terminals) No. 1, No. 3:
   Test point 2	Body ground

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

   Is there battery voltage?

   YES 

   Go to step 10.

   NO 

   Repair an open in the +B_IG_HOLD1 wire between the No. A10 fuse and the IGHLD1 relay.

10. Open wire check (IGA/IGAMONI line)

    -1. Disconnect the following connector.

    Battery condition monitor module connector E (32P)

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

    Test condition	Vehicle OFF (LOCK) mode
    	IGHLD1 relay: disconnected
    	Battery condition monitor module connector E (32P): disconnected
    Test point 1	IGHLD1 relay 4P socket (female terminals) No. 2:
    Test point 2	Battery condition monitor module connector E (32P) No. 23

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

    Is there 1. 0 Ω or less?

    YES 

    The IGA/IGAMONI wire is OK. Repair an open in the IGHLD wire between the IGHLD1 relay and the battery condition monitor module.

    NO 

    Repair an open in the IGA/IGAMONI wire between the IGHLD1 relay and the battery condition monitor module.