DTC P0AFA (492) (Battery Condition Monitor Module A)

DTC P0AFA : HV Battery System A Voltage Low

NOTE:

Before you troubleshoot, review the general troubleshooting information .
After this DTC troubleshooting is completed, do the battery pack voltage adjustment .

DTC Description	Confirmed DTC	Pending DTC	Freeze Frame
P0AFA HV Battery System A Voltage Low

DTC (Electric Powertrain)

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
P0AFA HV Battery System A Voltage Low

Is DTC P0AFA indicated?

YES

Go to step 2.

Intermittent failure, the system is OK at this time. Check for poor connection or loose terminal at the IGB relay and battery condition monitor module A. 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.

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

-2. Check the following fuse.

Fuse No. D2

Is the fuse OK?

YES

Go to step 3.

NO

Replace the No. D2 fuse. Also check a short to ground on the No. D2 fuse circuit if needed.
IGB relay check
-1. Remove the IGB relay .

-2. Test the IGB relay .

Is the relay OK?

YES

Go to step 4.

NO

Replace the IGB relay.

Open wire check (+B IGB line)

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

Test condition	Vehicle OFF (LOCK) mode
	IGB relay: removed
Test point 1	IGB relay 4P socket (female terminals) No. 2 and No. 3:
Test point 2	Body ground

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

Is there battery voltage?

YES

Go to step 5.

Repair an open in the +B IGB wire between the No. D2 fuse and the IGB relay.

Open wire check (IGB line) 1

-1. Do the 12 volt battery terminal disconnection procedure .

-2. Remove the service plug .

-3. Disconnect the following connector.

IPU 33P connector

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

Test condition	Vehicle OFF (LOCK) mode
	IGB relay: removed
	IPU 33P connector: disconnected
Test point 1	IGB relay 4P socket (female terminals) No. 1:
Test point 2	IPU 33P connector No. 33

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

Is there continuity?

YES

Go to step 6.

Repair an open in the IGB wire between the IGB relay and the IPU.

Open wire check (IG HOLD2 RLY CL- line)

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

Test condition	Vehicle OFF (LOCK) mode
	IGB relay: removed
	IPU 33P connector: disconnected
Test point 1	IGB relay 4P socket (female terminals) No. 4:
Test point 2	IPU 33P connector No. 22

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

Is there continuity?

YES

Go to step 7.

Repair an open in the IG HOLD2 RLY CL- wire between the IGB relay and the IPU.

Open wire check (IGB line) 2

-1. Remove the IPU .

-2. Remove the IPU cover .

-3. Disconnect the following connector.

Battery condition monitor module A connector F (20P)

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

Test condition	Vehicle OFF (LOCK) mode
	IGB relay: removed
	IPU 33P connector: disconnected
	Battery condition monitor module A connector F (20P): disconnected
Test point 1	IPU 33P connector (male terminals) No. 33:
Test point 2	Battery condition monitor module A connector F (20P) No. 10

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

Is there continuity?

YES

Go to step 8.

Repair an open in the IGB wire between the IPU 33P connector and battery condition monitor module A.

Open wire check (IGHLDB line)

-1. Disconnect the following connector.

Battery condition monitor module A connector G (24P)

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

Test condition	Vehicle OFF (LOCK) mode
	IGB relay: removed
	IPU 33P connector: disconnected
	Battery condition monitor module A connector F (20P): disconnected
	Battery condition monitor module A connector G (24P): disconnected
Test point 1	IPU 33P connector (male terminals) No. 22:
Test point 2	Battery condition monitor module A connector G (24P) No. 16

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

Is there continuity?

YES

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 A .

Repair an open in the IGHLDB wire between the IPU 33P connector and battery condition monitor module A.