Service Bulletin

(g)HONDA

15-057

September 4, 2015

02271 Version 1

Product Update: HV Cell Voltage Sensor (CVS) Software
AFFECTED VEHICLES
Year
Model

2014-15

Accord Hybrid

Trim

VIN Range

ALL

Check the iN VIN statues for eligibility

BACKGROUND

The cell voltage sensor may incorrectly interpret electrical noise from the inverter and motor circuits as a problem and
cause the vehicle to switch to a fail-safe EV mode. Additionally, DTCs P0B3B, high voltage battery cell voltage sensor
internal circuit malfunction and P0DA8, motor power inverter module voltage malfunction are often stored.
If the vehicle switches to fail-safe EV mode while cruising at highway speed, the engine shuts off and the vehicle will
experience a sudden loss of power as the fail-safe EV mode limits vehicle speed to a maximum of about 40 mph. If this
occurs, the vehicle may be able to travel for up to 2 miles in fail-safe EV mode, at which time the HV battery will likely
fully discharge. In reporting this situation, drivers may say that their vehicle stalled.
CUSTOMER NOTIFICATION

Owners of affected vehicles will be sent a notification of this campaign.
Do an iN VIN status inquiry to make sure the vehicle is shown as eligible.
Some vehicles affected by this campaign may be in your new or used inventory. Repair these vehicles before they are
sold.
CORRECTIVE ACTION

Do the inspection and based on your results, update the vehicle or replace the HV battery.
SOFTWARE INFORMATION

NOTE: Unnecessary or incorrect repairs resulting from a failure to update the HOS or MVCI are not covered under
warranty.
MVCI Control Module (CM) Update:
Application (FW) Version 3.01.42 or later
Database Update 04-AUG-2015 or later
HOS Software Version:
3.016.042 or later
Before beginning the repair, make sure that both the HDS and the MVCI are updated as listed above.
Do only the update listed in this service bulletin.

Check that the MVCI indicates the applicable program ID listed below (or a later program ID) as the Available Update
when the update begins. If the MVCI displays This vehicle does not need an update at this time during the update,
the software for this service bulletin is already installed.
For more information about updating the HDS, the MVCI, and vehicle systems, refer to Service Bulletin 01-023,
Updating Control Units/Modules.
Year/Model

2014-15 Accord Hybrid

Program ID
K1A020

Program Part number
1K411-5K1-A02

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CUSTOMER INFORMATION: The information in this bulletin is intended for use only by skilled technicians who have the proper tools,
equipment, and training to correctly and safely maintain your vehicle. These procedures should not be attempted by "do-it-yourselfers," and you
should not assume this bulletin applies to your vehicle, or that your vehicle has the condition described. To determine whether this information
applies, contact an authorized Honda automobile dealer.

© 2015 American Honda Motor Co., Inc. - All Rights Reserved

WARRANTY CLAIM INFORMATION
Operation
Number

Description

Flat Rate
Time

Template
ID

Defect
Code

Symptom
Code

Failed Part Number

1185B0

Do the inspection and
update the CVS software.
(No DTCs)

0.2 hr

15-057A

5ZF00

JT700

1K410-5 K 1-A03

1185B1

Do the inspection and
update the CVS software.
DTC and error codes
were set, but they were
cleared and the CVS
software updated.

0.5 hr

15-057B

5ZF00

JT700

1K410-5K1-A03

1185B2

Do the inspection and the
result was to replace the
battery. File a separate
warranty claim under
normal warranty for
replacing the HV
battery.

0.5 hr

15-057C

5ZF00

JT700

1K410-5K1-A03

Skill Level:

Repair Technician

INSPECTION AND UPDATE PROCEDURE
1.

Connect the HDS and check for DTCs.
•
•

2.

If OTC P0B3B or P0DA8 is not set, go to step 4.
If OTC P0B3B and/or P0DA8 is set, do not clear the DTC(s). Save all the freeze data, then go to step 2.

Do the HV Battery Diagnosis. Refer to the job aid New Procedures for Servicing the High Voltage Battery.
NOTE: The diagnosis displays the HV battery cell voltage failure information for sensor A, sensor B, and sensor C.
The errors are 8 digits and appear as a series of Os and 1s.

3.

Check the list for the following failures:
00000000

•
•

4.

00010000

00010100

If the three sensor failure results include 00010000 along with 00000000 and/or 00010100, write down the
failure codes on the RO before clearing all set codes, then go to step 4.
If the three sensor failure results do not have 00010000 or have any other codes not listed, write down the
failure code(s) on the RO and save the HOS freeze data and the Cell Voltage Sensor Check data, then replace
the HV battery. Refer to service information. You will need to file a separate warranty claim under normal
warranty for replacing the HV battery.

Update the CVS software with the MVCI. Refer to Service Bulletin 01-023, Updating Control Units/Modules. This
product update is complete.
END

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