NHTSA ID Number: 10060703
Manufacturer Communication Number: T-SB-0021-14 R1
TSB/Document Date: 2016-03-31
Summary
SUMMARY TO BE PROVIDED ON A FUTURE DATE.
@TOYOTA
T-SB-0021-14
Rev1
Technical Service Bulletin
April 10, 2014
Shudder on Deceleration After a Cold Soak
Service
Category
Drivetrain
Section
Automatic Transmission/Transaxle
Market
Toyota Supports ~
ASE Certification ~
USA
Applicability
YEAR(S)
MODEL(S)
ADDITIONAL INFORMATION
2012 - 2014
Tacoma
Transmission(s) 4AT
REVISION NOTICE
June 12, 2014 Rev1:
• The Production Change Information section has been added.
Any previous printed versions of this bulletin should be discarded.
Introduction
Some 2012 - 2014 model year Tacoma vehicles equipped with the A340 automatic transmission
may exhibit a shudder condition on deceleration at approximately 20 mph after the vehicle has cold
soaked . The Engine Control Module/ECM (SAE term : Powertrain Control Module/PCM) log ic has
been modified to reduce the possibility of this condition occurring . Follow the Repair Procedure in
this bulletin to address this condition .
Production Change Information
This bulletin applies to vehicles produced BEFORE the Production Change Effective VIN
shown below.
MODEL
TRANS
CAB
PRODUCTION CHANGE
EFFECTIVE VIN
Regular
5TFNX4CN#EX038924
Access
5TFTX4CN#EX043311
Double
5TFJX4CN#EX043312
Access
Double
5TFTX4GN#EX032772
5TFJX4GN#EX032767
Regular
5TFPX4EN#EX021789
Access
5TFUX4EN#EX027643
DRIVETRAIN
2WD
A340E
Tacoma
2TR-FE
2WD I PreRunner
A340F
4WD
© 2014 Toyota Motor Sales, USA
Page 1 of 6
@ TOYOTA
Rev1
T-SB-0021-14
Page 2 of 6
April 10, 2014
Shudder on Deceleration After a Cold Soak
Warranty Information
OP CODE
DESCRIPTI ON
EG1402
TIME
OFP
T1
T2
0.4
89661-04F80
89661-04F90
89661-04J10
89661-04J20
04
99
APPLICABLE WARRANTY
• Th is 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
MODEL YEAR
TRANS
2012
DRIVETRAIN
NEW
2WD
89661-04F80
89661-04F81
4WD I PreRunner
89661 -04F90
89661-04F91
2WD
89661-04J10
89661-04J11
4WD I PreRunner
89661-04J20
89661 -04J21
A340
2013 - 2014
PART NAME
PREVIOUS
QTY
-
-....___
-
Computer,
Engine Control
(ECM/PCM)
-
PART NUMBER
PART NAME
QTY
00451-00001-LBL
Authorized Modification Labels
1
NOTE
• The ECM (PCM) should NOT be replaced as part of the Repair Procedure.
• Authorized Modification Labels may be ordered in packages of 25 from the Materials
Distribution Center (MDC) through Dealer Daily- Dealer Support Materials Orders.
© 2014 Toyota Motor Sales, USA
T-SB-0021-14
Rev1
Page 3 of 6
April 10, 2014
Shudder on Deceleration After a Cold Soak
Calibration Information
CALIBRATION ID
MODEL
TRANS
MODEL YEAR
DRIVETRAIN
VOS
2WD
PREVIOUS
NEW
30471000
30471100
NX4CN
TX4CN
JX4CN
2012
Tacoma
4WD I PreRunner
30472000
304721 00
TX4GN
JX4GN
PX4EN
UX4EN
2WD
30485000
30485100
NX4CN
TX4CN
JX4CN
30486100
TX4GN
JX4GN
PX4EN
UX4EN
A340
20 13 - 2014
30486000
4WD I PreRunner
Required Tools & Equipment
REQUIRED EQUIPMENT
SUPPLIER
Techstream 2.0*
TIS Techstream
PART NUMBER
QTY
TS2UNIT
ADE
Techstream Lite
TSPKG1
TSLITEDLR01
NOTE
• Only ONE of the Techstream units listed above is required.
• Software version 9.10.037 or later is required.
• Additional Techstream units may be ordered by calling Approved Dealer
Equipment (ADE) at 1-800-368-6787.
• The Diagnostic Tester is NOT recommended for flash reprogramming .
Please use Techstream or an approved J2534 interface to perform flash
reprogramming updates. Visit techinfo.toyota.com for more information
regarding J2534 reprogramming.
© 2014 Toyota Motor Sa les, USA
1
T-SB-0021-14
Rev1
April 10, 2014
Page 4 of 6
Shudder on Deceleration After a Cold Soak
Required Tools & Equipment (Continued)
SPECIAL SERVICE TOOLS (SST)
PART NUMBER
QTY
GR8 Battery Diagnostic Station*
00002-M CGRB
1
NOTE
Additional SSTs may be ordered by calling 1-800-933-8335.
* Essential SST.
Repair Procedure
1. Confirm the condition .
Is there a shudder/vibration felt on deceleration at approximately 20 mph after the vehicle has
cold soaked?
• YES • NO -
Continue to step 2.
This bulletin does NOT apply. Continue diagnosis using the applicable Repair Manual.
2. Is the shudder/vibration gone after the vehicle has reached operating temperature?
• YES • NO -
Continue to step 3.
This bulletin does NOT apply. Continue diagnosis using the applicable Repair Manual.
© 2014 Toyota Motor Sales, USA
T-SB-0021-14
Rev1
Page 5 of 6
April 10, 2014
Shudder on Deceleration After a Cold Soak
Repair Procedure (Continued)
3. Check for the Authorized Modifications Label affixed to the vehicle in the location shown in
Figure 1. Confirm if the ECM (PCM) calibration has been updated . If the calibration ID listed is
NOT the latest ECM (PCM) calibration - go to step 4.
Figure 1. Location of Authorized Modifications Label on 2012 - 2014 Tacoma
THESE MODIFICATIONS HAVE BEEN APPROVED
AS APPROPRIATE BY EPA AND GARB
>----l~ DEALER CODE:
DATE :
._,..1----( 4
~C~H~A~N~G~E~A~UT~H~O~R~ITY~:~~~~~~============j-~~-{5
1
Replacement ECM (PCM) Part Number (i.e.,
B9661-04FB1)
2
New Calibration ID(s) (i.e., 30471100)
3
Dealer Code
4
Date Completed
5
This SB Number
© 2014 Toyota Motor Sales , USA
T-SB-0021-14
Rev1
April 10, 2014
Page 6 of 6
Shudder on Deceleration After a Cold Soak
Repair Procedure (Continued)
4. Flash reprogram the ECM (PCM) .
NOTE
• The GR8 Battery Diagnostic Station MUST be used in Power Supply Mode to maintain
battery voltage at 13.5 volts while flash reprogramming the vehicle.
• For details on how to use the GRS Battery Diagnostic Station, refer to the
GR8 Instruction Manual located on the Technical Information System {TIS),
Diagnostics - Tools & Equipment - Battery Diagnostics.
Follow the procedures outlined in Service Bulletin No. T-SB-0012-13, ''Techstream ECU Flash
Reprogramming Procedure," and flash the ECM (PCM) with the NEW calibration file update.
5. Disconnect the negative (-) battery terminal for 1 minute to clear the ECM learned values .
NOTE
There is NOT a Techstream utility to Reset Memory on a Tacoma equipped with an A340
transmission.
6. Test drive and confirm the repair.
7. Install the Authorized Modifications Label.
A. Using a permanent marker, enter the following information on the label:
• ECM 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. Affix the Authorized Modifications Label to the vehicle at the location shown in Figure 1.
The Authorized Modifications Label is available through the MDC, P/N 00451-00001-LBL.
© 2014 Toyota Motor Sales, USA
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TSB/Document ID: T-SB-0021-14 R1
Replacement Service Bulletin Number:
MFR Communication Date: 2014-04-10
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: POWER TRAIN:AUTOMATIC TRANSMISSION
MFR Component System:
MFR Component Subsystem:
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