T-SB-0056-22

June 23, 2022

Depleted 12V Auxiliary Battery
Service
Category

Power Source/Network

Section

Battery/Charging

Market USA

Applicability
YEAR(S)

MODEL(S)

2021

RAV4 Prime

ADDITIONAL INFORMATION

Introduction

Some 2021 model year RAV4 Prime vehicles may exhibit a depleted 12V auxiliary battery when in
IG-OFF due to a condition in which the Hybrid Vehicle Electronic Control Unit (HV ECU) does not
sleep. The HV ECU may not sleep if any of the following conditions have occurred with the vehicle:


The vehicle was towed or jump-started after a 12V battery discharge.



The vehicle’s 12V battery was disconnected and reconnected, as when accessories
were installed.



The 12V battery terminal(s) or power or ground harnesses were removed to repair
the vehicle.



A new 12V battery was put into the vehicle, or there was an open in the main fusible link.



Any other condition that may have caused power not properly flowing from the 12V battery
through the harness.

The HV ECU logic has been updated to reduce the possibility of this condition. Follow the
Repair Procedure in this bulletin to address this condition.
NOTICE
The condition in which the HV ECU does not sleep with resulting discharge of 12V battery may
be a secondary condition when other primary causes for low 12V battery voltage occur. The
primary cause of low 12V battery conditions will need to be addressed BEFORE completing the
procedures outlined in this Service Bulletin.

Page 1 of 6

T-SB-0056-22

June 23, 2022

Page 2 of 6

Depleted 12V Auxiliary Battery
Production Change Information

This bulletin applies to vehicles produced BEFORE the Production Change Effective VIN
shown below.
MODEL

PLANT

DRIVETRAIN

PRODUCTION CHANGE EFFECTIVE VIN

RAV4 Prime

Syokki

AWD

JTM#B3FV#MD046066

Warranty Information
OP CODE

DESCRIPTION

TIME

OFP

T1

T2

800259

Hybrid Vehicle Control
Computer Reprogramming

1.1

89980-#####*

71

74

*Warranty claim MUST be submitted with the correct 10-digit OFP. Choose the correct OFP for the vehicle being repaired
by searching for the parts in the Electronic Parts Catalog using the VIN filter.

APPLICABLE WARRANTY
 This repair is covered under the Toyota Hybrid Warranty. This warranty is in effect for 96 months
or 100,000 miles, whichever occurs first, from the vehicle’s in-service date.
 Warranty application is limited to occurrence of the specified condition described in
this bulletin.
 2021 model year RAV4 Prime vehicles that are registered and normally operated in California,
Arizona (2012 model year only), Connecticut (starting with 2005 model year), Maine (starting
with 2004 model year), Maryland (starting with 2011 model year), Massachusetts (starting with
2004 model year), New Hampshire (2005 – 2009 model year only), New Jersey (starting with
2005 model year), New Mexico (2010 – 2011 model year only), New York (beginning with 2004
model year with Zero Emissions (ZE) models only; all models starting with 2016 model year),
Oregon (starting with 2008 model year), Rhode Island (starting with 2005 model year), and
Vermont (starting with 2004 model year) – Partial Zero Emission Vehicle (PZEV) Emission
Warranty Coverage is in effect for 15 years or 150,000 miles, from the vehicle’s in-service
date, whichever occurs first. (Please reference Warranty Policy Bulletin POL14-09 for
additional information)
 Four additional states (Delaware [beginning with 2014 model year], Colorado [starting 2022
model year], Pennsylvania [beginning with 2008 model year], and Washington [beginning with
2009 model year]) have adopted the California Emission Warranty. However, in these states,
performance and long-term defect warranty coverage is 7 years or 70,000 miles, whichever
occurs first.

T-SB-0056-22

June 23, 2022

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Depleted 12V Auxiliary Battery
Parts Information
PART NUMBER
PREVIOUS

NEW

89980-42250
89980-42251

89980-42252

00451-00001-LBL

PART NAME

QTY

Computer, Hybrid Vehicle Control

–

Authorized Modifications Labels

1

NOTE
 The HV ECU should NOT be replaced as part of the Repair Procedure.
 The HV ECU does not sleep condition with resulting discharge of 12V battery may be a secondary
condition when other primary causes for low 12V battery voltage occur.
 Authorized Modifications Labels may be ordered in packages of 25 from the Materials
Distribution Center (MDC) through Dealer Daily – Parts – Dealer Support Materials Orders.

Required Tools & Equipment
SPECIAL SERVICE TOOLS (SST)

PART NUMBER

QTY

Battery Diagnostic Tool*

DCA-8000P T

1

*Essential SST.

NOTE
Additional SSTs may be ordered by calling 1-800-933-8335.

REQUIRED EQUIPMENT

SUPPLIER

Techstream ADVI*

PART NUMBER

QTY

TSADVUNIT

Techstream 2.0

TS2UNIT
ADE

1

Techstream Lite

TSLITEPDLR01

Techstream Lite (Green Cable)

TSLP2DLR01

*Essential SST.

NOTE
 Only ONE of the Techstream units listed above is required.
 Software version 17.10.012 or later is required.
 Additional Techstream units may be ordered by calling Approved Dealer Equipment (ADE)
at 1-800-368-6787.
 Use Techstream or an approved J2534 interface to perform flash reprogramming updates.
Visit techinfo.toyota.com for more information regarding J2534 reprogramming.

T-SB-0056-22

June 23, 2022

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Depleted 12V Auxiliary Battery
Calibration Information
CALIBRATION ID
MODEL

ECU
PREVIOUS

NEW

899834222000
Main
RAV4 Prime

899834222200
899834222100

Sub

899854203000

899854203100

Repair Procedure

1. Has the vehicle exhibited a depleted 12V auxiliary battery?
NOTICE
The HV ECU may not sleep if ANY of the following have occurred with the vehicle:
 The vehicle was towed or jump-started after a 12V battery discharge.
 The vehicle’s 12V battery was disconnected and reconnected, as when accessories
were installed.
 The 12V battery terminal(s) or power or ground harnesses were removed to repair
the vehicle.
 A new 12V battery was put into the vehicle, or there was an open in the main fusible link.
 Any other condition that may have caused power not properly flowing from the 12V battery
through the harness.
Ensure these are addressed before continuing to step 2.



YES — Continue to step 2.



NO — This bulletin does NOT apply. Continue diagnosis using the applicable
Repair Manual.

T-SB-0056-22

June 23, 2022

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Depleted 12V Auxiliary Battery
Repair Procedure (continued)

2. Use Techstream to confirm if the HV ECU calibration has been updated and check for the
Authorized Modifications Label affixed to the vehicle in the location shown below.
Is the calibration ID listed in Techstream and on the label the latest HV ECU calibration?


YES — This bulletin does NOT apply. Continue diagnosis using the applicable
Repair Manual.



NO — Continue to step 3.

Figure 1. Location of Authorized Modifications Label on 2021 RAV4 Prime

TOYOTA MOTOR CORPORATION
AUTHORIZED MODIFICATIONS
THE FOLLOWING MODIFICATIONS HAVE BEEN MADE:
1
2

THESE MODIFICATIONS HAVE BEEN APPROVED
AS APPROPRIATE BY EPA AND CARB
3

DEALER CODE:
CHANGE AUTHORITY:

DATE:

4
5

1

Replacement Hybrid Vehicle Control
Computer Part Number (e.g., 89980-42252)

4

Date Completed

2

New Calibration ID (e.g., Main –
899834222200, Sub – 899854203100)

5

This SB Number

3

Dealer Code

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Depleted 12V Auxiliary Battery
Repair Procedure (continued)

3. Flash reprogram the HV ECU.
NOTE
 The battery diagnostic tool MUST be used in Power Supply Mode to maintain battery voltage
at 13.0 – 13.5V while flash reprogramming the vehicle.
 For details on how to use the battery diagnostic station, refer to the DCA-8000 Instruction Manual
located at TIS – Diagnostics – Tools & Equipment – Battery Diagnostics.

Follow the procedures outlined in T-SB-0107-20, ECU Flash Reprogramming With Security
Signature, and flash the HV ECU with the NEW calibration file update.

4. Prepare and install the Authorized Modifications Label.
A. Using a permanent marker, enter the following information on the label:
 HV ECU part number [Refer to the Parts Information section for the NEW
PART NUMBER]





Calibration ID(s) [Refer to the Calibration Information section for the
NEW CALIBRATION ID]
Dealer Code
Repair Date
Change Authority [This bulletin number]

B. Install the Authorized Modifications Label onto the vehicle at the location shown in
Figure 1. The Authorized Modifications Label is available through the MDC,
P/N 00451-00001-LBL.

5. Test-drive the vehicle to confirm proper operation.