DTC U0146 (611)

DTC U0146  : F-CAN Malfunction (Battery Charge Control Module - CAN Gateway)

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
   U0146 F-CAN Malfunction (Battery Charge Control Module - CAN Gateway)

   Is DTC U0146 indicated?

   YES 

   The failure is duplicated. Go to step 2.

   NO 

   Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the battery charge control module and the CAN gateway. 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. CAN gateway system DTCs check

   -1. Check for CAN gateway system DTCs with the HDS.

   DTC Description	DTC

   DTC (CAN Gateway)

   Are any DTCs indicated?

   YES 

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

   NO 

   Go to step 3.

3. F-CAN circuit communication check

   -1. Do the F-CAN Bus Connected Unit Check in the Function Test with the HDS.

   F-CAN Bus Connected Unit Check

   Which result is indicated?

   Battery charge control module (Bus A) is Not Available 

   Go to step 4.

   Battery charge control module (Bus B) is Not Available 

   Go to step 5.

   Battery charge control module (Bus D) is Not Available 

   Go to step 6.

   Battery charge control module is Detected 

   Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the CAN gateway and the battery charge control module. 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.

4. 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 charge control module connector B (40P)

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

   Test condition	Vehicle OFF (LOCK) mode
   	CAN gateway 16P connector: disconnected
   	Battery charge control module connector B (40P): disconnected
   Test point 1	CAN gateway 16P connector (female terminals) No. 3:
   Test point 2	Battery charge control module connector B (40P) No. 6

   Test point 1	CAN gateway 16P connector (female terminals) No. 11:
   Test point 2	Battery charge control module connector B (40P) No. 26

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

   Is there continuity?

   YES 

   The F-CAN A_H wire and the F-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 charge control module .

   NO 

   Repair an open in the F-CAN A_H wire and/or the F-CAN A_L wire between the battery charge control module and the CAN gateway.

5. Open wire check (F-CAN B_H line, F-CAN B_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 charge control module connector B (40P)

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

   Test condition	Vehicle OFF (LOCK) mode
   	CAN gateway 16P connector: disconnected
   	Battery charge control module connector B (40P): disconnected
   Test point 1	CAN gateway 16P connector (female terminals) No. 6:
   Test point 2	Battery charge control module connector B (40P) No. 4

   Test point 1	CAN gateway 16P connector (female terminals) No. 14:
   Test point 2	Battery charge control module connector B (40P) No. 24

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

   Is there continuity?

   YES 

   The F-CAN B_H wire and the F-CAN B_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 charge control module .

   NO 

   Repair an open in the F-CAN B_H wire and/or the F-CAN B_L wire between the battery charge control module and the CAN gateway.

6. Open wire check (F-CAN D_H line, F-CAN D_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 charge control module connector B (40P)

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

   Test condition	Vehicle OFF (LOCK) mode
   	CAN gateway 16P connector: disconnected
   	Battery charge control module connector B (40P): disconnected
   Test point 1	CAN gateway 16P connector (female terminals) No. 7:
   Test point 2	Battery charge control module connector B (40P) No. 3

   Test point 1	CAN gateway 16P connector (female terminals) No. 15:
   Test point 2	Battery charge control module connector B (40P) No. 23

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

   Is there continuity?

   YES 

   The F-CAN D_H wire and the F-CAN D_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 charge control module .

   NO 

   Repair an open in the F-CAN D_H wire and/or the F-CAN D_L wire between the battery charge control module and the CAN gateway.