T-SB-0152-19

T-SB-0152-19
November 1, 2019
Hesitation on Acceleration From a Slow Roll or Rolling
Stop
Service
Category
Engine/Hybrid System
Section
Engine Control
Market USA
Applicability
YEAR(S)
MODEL(S)
2019
Camry
ADDITIONAL INFORMATION
Introduction
Some 2019 model year Camry vehicles may exhibit a hesitation on acceleration from a slow roll
or rolling stop under the following conditions.

6 mph or below

Immediately following a 3 – 1 downshift

Less than 40% accelerator pedal application
The Engine Control Module/ECM (SAE Term: Powertrain Control Module/PCM) logic has been
modified to reduce the potential for hesitation. Follow the Repair Procedure in this bulletin to
update the ECM calibration.
NOTE
This Service Bulletin requires a drive pattern to be performed after the calibration update is completed.
The proper execution of these drive patterns is necessary for the drivability updates to take effect.
Refer to the Repair Procedure for drive pattern details.
© 2019 Toyota Motor Sales, USA
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Hesitation on Acceleration From a Slow Roll or Rolling Stop
Warranty Information
OP CODE
EG1912
DESCRIPTION
TIME
Engine ECU Reprogramming
WMI
OLD ECU PN
JTN
89661-33Y40
89661-33Y41
4T1
89661-0X580
89661-0X581
89661-0X582
1.4
T1
T2
04
74
APPLICABLE WARRANTY
 This repair is covered under the Toyota Federal Emission Warranty. This warranty is in effect for
96 months or 80,000 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
WMI
JTN
4T1
–
PREVIOUS
NEW
89661-33Y40
89661-33Y41
89661-33Y42
89661-0X580
89661-0X581
89661-0X582
PART NAME
QTY
Computer, Engine Control (ECM)
–
Authorized Modifications Labels
1
89661-0X583
00451-00001-LBL
NOTE
 The ECM (PCM) 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 Materials Orders.
© 2019 Toyota Motor Sales, USA
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Hesitation on Acceleration From a Slow Roll or Rolling Stop
Required Tools & Equipment
REQUIRED EQUIPMENT
SUPPLIER
Techstream ADVi*
Techstream 2.0
Techstream Lite
PART NUMBER
QTY
TSADVUNIT
ADE
Techstream Lite (Green Cable)
TS2UNIT
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
Battery Diagnostic Tool*
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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Hesitation on Acceleration From a Slow Roll or Rolling Stop
Calibration Information
CALIBRATION ID
PREVIOUS
NEW
8966333Q6000
8966333Q6100
8966333Q6300 / 896653374100
8966333Q6200
896653374000
Repair Procedure
1. Confirm the condition exists.
Does the vehicle exhibit hesitation on acceleration from a slow roll or rolling stop under ANY of the
following conditions?
 6 mph or below
 Immediately following a 3 – 1 downshift
 Less than 40% accelerator pedal application
 YES — Continue to step 2.
 NO — This bulletin does NOT apply. Continue diagnosis using the applicable
Repair Manual.
© 2019 Toyota Motor Sales, USA
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Hesitation on Acceleration From a Slow Roll or Rolling Stop
Repair Procedure (continued)
2. Use Techstream to confirm if the ECM (PCM) 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 ECM (PCM) 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 2019 Camry
TOYOTA MOTOR CORPORATION
AUTHORIZED MODIFICATIONS
1
THE FOLLOWING MODIFICATIONS HAVE BEEN MADE:
2
3
THESE MODIFICATIONS HAVE BEEN APPROVED
AS APPROPRIATE BY EPA AND CARB
DEALER CODE:
CHANGE AUTHORITY:
1
Replacement ECM (PCM) Part Number
(e.g., 89661-33Y42)
4
Date Completed
2
New Calibration ID (e.g., 8966333Q6300)
5
This SB Number
3
Dealer Code
© 2019 Toyota Motor Sales, USA
4
5
DATE:
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Hesitation on Acceleration From a Slow Roll or Rolling Stop
Repair Procedure (continued)
3. Flash reprogram the ECM (PCM).
NOTE
 The battery diagnostic tool 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 battery diagnostic tool, refer to the DCA-8000 Instruction 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 ECM (PCM) 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:

ECM (PCM) 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.
© 2019 Toyota Motor Sales, USA
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Hesitation on Acceleration From a Slow Roll or Rolling Stop
Repair Procedure (continued)
NOTE
 This Service Bulletin requires a drive pattern to be performed AFTER the calibration update has
been completed. The proper execution of these drive patterns is necessary for the modification to
take effect as soon as possible. Step 5 describes the drive pattern details.
 When performing step 5, you MUST take the vehicle to a safe, open area and/or low traffic
location to perform the drive pattern.
 Use care when viewing Techstream and performing the drive patterns. Consider using another
technician for Techstream confirmation of Shift Status.
5. Drive the vehicle to a safe and appropriate location where the following drive patterns can be
performed. Then, perform the following drive patterns.
A. From a speed of 18 – 22 mph, apply consistent braking to decelerate to 0 mph in
3 seconds. Complete this pattern 15 times.
(1) Using Techstream, monitor the transmission shift status and ensure that the vehicle
shifts from 3rd – 1st gear (skips 2nd gear) during each deceleration attempt.
B. From a speed of 18 – 22 mph, apply consistent braking to decelerate to 0 mph in
15 seconds. Complete this pattern 15 times.
(1) Using Techstream, monitor the transmission shift status and ensure that the vehicle
shifts from 3rd to 2nd to 1st gear during each deceleration attempt.
6. Return the vehicle to the customer and explain that the transmission shift schedule has been
modified and should adapt to the customer’s driving habits as the vehicle is driven.
© 2019 Toyota Motor Sales, USA