T-SB-0241-17_Rev

T-SB-0241-17
Rev1
July 27, 2017
Reduced Power When Accelerating From a Stop
Service
Category
Engine/Hybrid System
Section
Hybrid/Battery Control System
Market USA
Applicability
YEAR(S)
MODEL(S)
ADDITIONAL INFORMATION
2016 - 2019
Prius
VDS(s): KBRFU, L9RFU
REVISION NOTICE
October 28, 2019 Rev1:
 The entire bulletin has been updated.
Any previous printed versions of this bulletin should be discarded.
Introduction
Some 2016 – 2019 model year Prius vehicles equipped with a NiMH HV battery may exhibit one or
both of the following conditions after repeated driving on long downhill slopes or while driving in
high ambient temperatures, then turned off for approximately 1 – 2 hours, and restarted:

When accelerating from a stop or from extremely low speeds, the vehicle may have a
reduction in power.

The HV battery monitor on the multi-information display continually shows one bar, indicating
that the battery State-Of-Charge (SOC) is at its lowest level.
The Hybrid Control Computer (HV ECU) logic has been modified to reduce the possibility of these
conditions. Follow the Repair Procedure in this bulletin to address these conditions condition.
© 2019 Toyota Motor Sales, USA
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Reduced Power When Accelerating From a Stop
Production Change Information
This bulletin applies to vehicles produced BEFORE the Production Change Effective VINs
shown below.
MODEL YEAR
MODEL
PLANT
PRODUCTION CHANGE EFFECTIVE VIN
Tsutsumi
JTDKBRFU#J3083928
JTDKBRFU#J3604954
2016 – 2018
Prius
2019
JTDL9RFU#L3013264
Warranty Information
OP CODE
DESCRIPTION
TIME
OFP
T1
T2
EL1914
Reprogram HV ECU
0.4
89981-47###
05
74
APPLICABLE WARRANTY
 This repair is covered under the Toyota Hybrid Vehicle System Component. This warranty is in
effect for 96 months or 100,000 miles, whichever occurs first, from the vehicle’s in-service date.
 For California specification 2016 – 2017 model year Prius vehicles sold, registered, and
operated in California, Connecticut, Maine, Maryland, Massachusetts, New Jersey, New York,
Oregon, Rhode Island, and Vermont, this repair is covered under the California Emission
Warranty, which is in effect for 180 months or 150,000 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.
Parts Information
PART NUMBER
PART NAME
QTY
89981-#####
Hybrid Vehicle Control Computer (HV ECU)
–
00451-00001-LBL
Authorized Modifications Labels
1
PREVIOUS
NEW
NOTE
 The HV ECU should NOT be replaced as part of the Repair Procedure.
 Authorized Modifications Labels may be ordered in packages of 25 from the Materials
Distribution Center (MDC) through Dealer Daily – Parts – Dealer Support Material Order.
© 2019 Toyota Motor Sales, USA
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Reduced Power When Accelerating From a Stop
Required Tools & Equipment
REQUIRED EQUIPMENT
SUPPLIER
Techstream ADVi*
Techstream Lite (Green Cable)
QTY
TSADVUNIT
Techstream 2.0
Techstream Lite
PART NUMBER
TS2UNIT
ADE
1
TSLITEPDLR01
TSLP2DLR01
*Essential SST.
NOTE
 Only ONE of the Techstream units listed above is required.
 Software version 14.20.019 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.
SPECIAL SERVICE TOOLS (SST)
PART NUMBER
QTY
DCA-8000 Battery Diagnostic Station*
DCA-8000P T
1
*Essential SST.
NOTE
Additional SSTs may be ordered by calling 1-800-933-8335.
© 2019 Toyota Motor Sales, USA
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Reduced Power When Accelerating From a Stop
Calibration Information
MODEL YEAR
2016
–
2017
CALIBRATION ID
PREVIOUS
NEW
899854702000
899854702100
899854702200
899854702300
899834751000
899834751100
899834751200
899834751300
899834751400
899834751500
899834760000
899834760100
899834760200
899834760300
899834760400
899834760500
899834760600
899854702400 / 899834760700
899854701000
899854707000
899854701100
899854707100
899854701200
899854707200
899854701300
899854707300
899834734000
899834734100
899834734200
899834734300
899834734400
899834734500
899834757000
899834757100
899834757200
899834757300
899834757400
899834757500
899834757600
899854701400 / 899834757700
© 2019 Toyota Motor Sales, USA
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Reduced Power When Accelerating From a Stop
Calibration Information (continued)
CALIBRATION ID
MODEL YEAR
2018
2019
PREVIOUS
NEW
899834780000
899834780100
899834788000
899834788100
899834788200
899834778000
899834778100
899834786000
899834786100
899834786200
8998347B4000
8998347C1000
8998347C1100
Repair Procedure
1. Does the vehicle exhibit ANY of the following?
A. When accelerating from a stop or from extremely low speeds, the vehicle may have a
reduction in power.
B. The HV battery monitor on the multi-information display continually shows one bar,
indicating that the battery State-Of-Charge (SOC) is at its lowest level.
 YES — Continue to step 2.
 NO — This bulletin does NOT apply. Continue diagnosis using the applicable
Repair Manual.
2. Confirm the vehicle has a NiMH battery by inspecting the 5th digit of the VIN.
Is the 5th character a “B” or a “9”?

YES — Continue to step 3.

NO — This bulletin does NOT apply. Continue diagnosis using the applicable
Repair Manual.
© 2019 Toyota Motor Sales, USA
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Rev1
July 27, 2017
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Reduced Power When Accelerating From a Stop
Repair Procedure (continued)
3. Check for the Authorized Modifications Label affixed to the vehicle in the location shown below.
Confirm if the HV ECU calibration has been updated.
Is the calibration ID listed the latest HV ECU calibration?

YES — This bulletin does NOT apply. Continue diagnosis using the applicable
Repair Manual.

NO — Continue to step 4.
Figure 1. Location of Authorized Modifications Label on 2016 – 2019 Prius
1
Replacement HV ECU Part Number
(i.e., 89981-#####)
4
Date Completed
2
New Calibration ID(s) (i.e., 8998347C1100)
5
This SB Number
3
Dealer Code
© 2019 Toyota Motor Sales, USA
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Reduced Power When Accelerating From a Stop
Repair Procedure (continued)
4. Flash reprogram the HV ECU.
NOTE
 The DCA-8000 battery diagnostic station MUST be used in Power Supply Mode to maintain
battery voltage at 13.5V while flash reprogramming the vehicle.
 For details on how to use the DCA-8000 battery diagnostic station,
refer to the “DCA-8000 Instructions Manual” located at
TIS – Diagnostics –Tools & Equipment – Battery Diagnostics.
Follow the procedures outlined in Service Bulletin T-SB-0134-16, Techstream ECU Flash
Reprogramming Procedure, and flash the HV ECU with the NEW calibration file update.
5. 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 on the vehicle at the location shown in
Figure 1. The Authorized Modifications Label is available through the MDC,
P/N 00451-00001-LBL.
6. Ready the vehicle ON, warm it up to normal operating temperature, and test drive to confirm
proper vehicle operation.
© 2019 Toyota Motor Sales, USA