DTC U0146 (306) (Battery Condition Monitor Module)

DTC U0146  : F-CAN Malfunction (Battery Condition Monitor Module - CAN Gateway)

NOTE:  Before you troubleshoot, review the general troubleshooting information .

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 Condition Monitor 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. 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 Pending or Confirmed DTCs indicated?

   YES 

   Go to the CAN gateway system troubleshooting .

   NO 

   Go to step 3.

3. Open wire check (F-CAN A_H line)

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

   -2. Remove the service plug and the IPU cover .

   -3. Disconnect the following connectors.

   Battery condition monitor module connector E (32P)

   CAN gateway 16P connector

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

   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

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

   Is there 1.0 Ω or less?

   YES 

   Go to step 4.

   NO 

   Repair an open in the F-CAN A_H wire between the CAN gateway and the battery condition monitor module (E9).

4. Open wire check (F-CAN A_L line)

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

   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. 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 

   The F-CAN A_L wire is OK. Replace the battery condition monitor module .

   NO 

   Repair an open in the F-CAN A_L wire between the CAN gateway and the battery condition monitor module (E8).