Toyota addresses its transmission problem — sort of.

If the announcement were any quieter, the whole world would have missed it.  Hell, call it covert, because even guys like me who have been a thorn in Toyota’s side missed this one.

The big news is that Toyota FINALLY has a much anticipated “reflash” for its transmission control, which is intended to reduce the problems found in five-speed automatic-equipped Avalons.  If you recall, the Avalon trannies had a horrible issue of not selecting a gear from stops or low speed, which often resulted in near-catastrophe collisions.  Transmission shifting / downshifting was always rough.  This seemed to affect mostly 2005, 2006 and some 2007 Avalons, but also Camrys with the same V6/ five-speed-auto combo.

One would think that this being a safety issue, the Feds would have required a full-on recall.  Nope…Somehow Toyota managed to get away with just a TSB.  This means you will only get the fix if you go in, schedule an appointment and ask for the fix.  Even my local dealership — which told me they’d call me the second there was an available fix, didn’t make any attempt to contact me. 

Oh yeah — the fix is nearly two months old.

So far most people have been satisfied, but I’ll reserve comment on the success until well after I get my personal Avalon in sometime next week.

For reference — here’s the entire copy of the Technical Service Bulletin:

ENGINE

Technical Service
BULLETIN

June 6, 2007

Title:

ECM CALIBRATION: ENHANCEMENT
TO SHIFTING PERFORMANCE.
& SMOOTHNES.

Models:

’06 – ’07 Avalon

EG029-07
Introduction
To enhance shifting performance and smoothness during acceleration, the Engine
Control Module/ECM (SAE term: Powertrain Control Module/PCM) calibration has
been revised. Please use the following procedure to address customer concerns.

NOTE:

Before proceeding, verify the ECM (PCM) calibration has NOT been updated by
checking for the Authorized Modifications Label (shown in step 1 of the
Repair Procedure).

Applicable .
2006 – 2007 model year Avalon vehicles produced BEFORE the Production Change
Vehicles

Effective VIN shown below.

Production
Change
Information

MODEL PRODUCTION CHANGE EFFECTIVE VIN
Avalon 4T1BK36B#7U243331

Parts
Information

MODEL
YEAR
PREVIOUS PART NUMBER CURRENT PART NUMBER PART NAME QTY
20062006
89661–07450
89661–07471* ECM (PCM)( ) –89661–07451
2007 89661–07470
– N/A 00451–00001–LBL Authorized
Modifications Label
1

* The ECM (PCM) should NOT be replaced as part of the Repair Procedure.
NOTE:

Authorized Modification Labels may be ordered in packages of 25 from the Materials
Distribution Center (MDC) through Dealer Daily Dealer Support Materials System or by
calling the MDC at 1–800–622–2033.

Warranty
Information

OP CODE DESCRIPTION TIME OFP T1 T2
EG7023 Recalibrate ECM (PCM) 0.9 89661–##### 26 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 correction of a problem based upon a customer’s

specific complaint.
Toyota Supports ASE Certification
Page 1 of 4

ECM CALIBRATION: ENHANCEMENT TO SHIFTING PERFORMANCE & SMOOTHNESS – EG029-07 June 6,

2007

Required
Tools &
Material

REQUIRED EQUIPMENT SUPPLIER PART NUMBER QTY
TIS Techstream*
NOTE: Software version 2.00.008 or
later is required.
ADE TSUNT 1
GR8 Battery Diagnostic Station* SPX/OTC 00002–MCGR8 1

* Essential SSTs.
NOTE:

.
Additional Techstream units may be ordered by calling Approved Dealer
Equipment (ADE) at 1–800–368–6787.
.
The Toyota Diagnostic Tester and CAN Interface Module may also be used to
perform the service procedures listed in this bulletin.
.
The GR8 Battery Diagnostic Station (P/N 00002–MCGR8) supersedes the
Automatic Trickle Charger (P/N 00002–YA122–01) and Fast Battery Chargers
(Associated P/N ASE6003 and Christie P/N CAPPDQ). P/N 00002–YA122–01,
ASE6003, and CAPPDQ are now obsolete.
Calibration
Identification
Chart

MODEL MODEL YEAR
PREVIOUS
CALIBRATION ID
NEW
CALIBRATION ID
VDS
AvalonAvalon
2006 30705000
30705100 3070710030707100 BK36BBK36B
2007 30707000

NOTE:

Vehicles which have been flash reprogrammed using the procedures in this TSB
will contain upgraded 2007 model year OBD II logic. Refer to the 2007 model year
Avalon Repair Manual on the Technical Information System (TIS) when checking
Powertrain Diagnostic Trouble Codes (DTCs) on 2006 model year vehicles that
have been reprogrammed.

Page 2 of 4

ECM CALIBRATION: ENHANCEMENT TO SHIFTING PERFORMANCE & SMOOTHNESS – EG029-07 June 6,

2007

Repair 1. Check for the Authorized Modifications Label affixed to the vehicle in the

location
Procedure

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 2.

Replacement
ECM (PCM)
Part
Number

Calibration
ID(s)

THE FOLLOWING MODIFICATIONS HAVE BEEN MADE:
89661–07471
30707100
THESE MODIFICATIONS HAVE BEEN APPROVED
AS APPROPRIATE BY EPA AND CARB
DEALER CODE: DATE:
CHANGE AUTHORITY: TSB EG029–07

Date
Completed

Dealer Code
TSB Number

Figure 1. Location of Authorized Modifications Label on 2007 Avalon

2. 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 TIS, Diagnostics – Battery.
Follow the procedures outlined in TSB No. SS002–07, “Techstream ECU Flash
Reprogramming Procedure,” and flash the ECM (PCM) with the NEW calibration
file update.

3.
Start the engine and warm it up to normal operating temperature before test–driving.
4.
Test–drive the vehicle to confirm proper vehicle operation (and proper laser cruise
control operation, if so equipped).
Page 3 of 4

ECM CALIBRATION: ENHANCEMENT TO SHIFTING PERFORMANCE & SMOOTHNESS – EG029-07 June 6,

2007

Repair 5. Install the Authorized Modifications Label.

A. Using a permanent marker, enter the following information on the label:
Procedure
(Continued)

.
ECM part number: [Refer to the Parts Information section for the CURRENT
PART NUMBER]
.
Calibration ID(s): [Refer to the Calibration Identification Chart for the NEW
CALIBRATION ID]
.
Dealer Code
.
Repair Date
.
Change Authority (this TSB number): EG029–07
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.
Page 4 of 4

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5 Responses to Toyota addresses its transmission problem — sort of.

  1. roger says:

    What about the 2005 Avalons? We have be battling this problem for 3 years. Will this fix work for those?

  2. sean says:

    Have there been any of the Avalon transmission issues ( hesitations/searching) or torque converter problems with the 2008 models using the 6sp transmissions?

  3. Sean,
    We have heard no complaints regarding the new 6-speed transmission. Unfortunately for owners of 5-spd cars, the sixer appears to be Toyota’s actual “fix” for the problem.

    If we hear of any issues on the new tranny, we’ll get on our soapbox here and scream.

  4. toyotaz says:

    nice post..! it is being solved at the last!

  5. Chris says:

    Any luck getting Toyota to pay for repairs due to transmission break down caused by this problem after powertrain warranty expires? 63,987mi and $5,100.00 price to replace to another 5-speed trans. Crazy?

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