T-SB-0021-14 Service Bulletin/Repair Instructions

®TOYOTA

T-58-0021-14
Technical Service Bulletin
April 10, 2014
Shudder on Deceleration After a Cold Soak

Service

Category
Drivetrain
Section
Automatic Transmission!Transaxle
Market
Toyota Supports ~

ASE C ertifica tion ~
USA
Applicability

YEAR(S)
MODEL(S)
ADDITIONAL INFORMATION
2012-2014
Tacoma
Transmission (s): 4AT
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) logic has

been modified to reduce the possibility of this condition occurring . Use the following procedure to

address this condition.

Warranty Information

OP CODE
EG1402
DESCRIPTION
Reprogram ECM (PCM)
TIME
OFP
T1
T2
0.4
89661 -04F80

89661-04F90

89661-04J10

89661-04J20
04
99
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.
© 20 14 Toyota Motor Sales , USA
Page 1 of 5
®TOYOTA
April 10, 2014
T-SB-0021-14
Page 2 of 5
Shudder on Deceleration After a Cold Soak
Parts Information

PART NUMBER

MODEL YEAR
TRANS
DRIVETRAIN
PART NAME
2WD
2012

A340

2013-2014
PREVIOUS
NEW
89661-04F80
89661-04F81
4WD I PreRunner
89661-04F90
89661-04F91
2WD
89661-04J10
89661 -04J11
4WD I PreRunner
89661-04J20
89661-04J 21
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.
Calibration Information

CALIBRATION ID

MODEL
TRANS
MODEL YEAR
DRIVETRAIN
2WD
VOS

PREVIOUS
NEW
30471000
30471100
NX4CN

TX4CN

JX4CN
2012
Tacoma
4WD I PreRunner
30472000
30472100
TX4GN

JX4GN

PX4EN

UX4EN
2WD
30485000
30485100
NX4CN

TX4CN

JX4CN
30486100
TX4GN

JX4GN

PX4EN

UX4EN
A340
2013-2014

4WD I PreRunner
© 2014 Toyota Motor Sales, USA
30486000
@TOYOTA
T-SB-0021-14
Page 3 of 5
April 10, 2014
Shudder on Deceleration After a Cold Soak
Required Tools & Equipment

REQUIRED EQUIPMENT
SUPPLIER
QTY
TS2UNIT
Techstream 2.0*

TIS Techstream
PART NUMBER
ADE
TSPKG1
1
TSLITEDLR01
Techstream Lite
NOTE

• Only ONE of the Techstream units listed above is required.

• Software version 9.00.026 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.
SPECIAL SERVICE TOOLS (SST)
PART NUMBER
QTY
GR8 Battery Diagnostic Station*
00002-MCGR8
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 -
Continue to step 2.
• NO - 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
@TOYOTA
T-SB-0021-14
April 10, 2014
Page 4 of 5
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
THE FOLLOWING MODIFICATIONS HAVE BEEN MADE:
THESE MODIFICATIONS HAVE BEEN APPROVED

AS APPROPRIATE BY EPA AND CARB

3 >-- •* DEALER CODE :

CHANGE AUTHORITY:
1
Replacement ECM (PCM) Part Number (i.e.,

89661-04F81)
2
New Calibration ID(s) (i .e., 30471100)
3
Dealer Code
DATE:
4

5
© 2014 Toyota Motor Sales, USA
I
D•I• Comploted
This SB Number
@TOYOTA
April 10, 2014
T-SB-0021-14
Page 5 of 5
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 GR8 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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