Camry V6-3.0L (1MZ-FE) (2004)
PROM - Programmable Read Only Memory: All Technical Service Bulletins
Engine Controls - A/T Downshift Lag/Gear Hunting
TRANSMISSION & CLUTCH
TC005-05
Title:
ECM CALIBRATION: SHIFT FEELING
ENHANCEMENT
Models:
'04 - '05 Camry (1MZ-FE, 5-Speed A/T)
June 21, 2005
Introduction
To improve the transmission shift feeling during specific operating modes, the Engine Control Module (SAE term: Powertrain Control Module/PCM)
calibration has been revised. These improvements include:
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Reduced downshift lag when accelerating at speeds from 10 to 20 mph.
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Less gear hunting when driving on/off accelerator pedal at 20 to 30 mph (for example: during heavy rush-hour traffic).
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Improved response rate during heavy acceleration from a stop.
NOTE:
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Version 12.2a or later Diagnostic Tester software is required to perform this procedure.
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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).
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Harsh ATM shifting may result if any Repair Procedure steps are omitted (specifically steps 2 and 4 of "Flash Reprogram ECM").
Applicable Vehicles
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2004 - 2005 model year Camry vehicles equipped with 1MZ-FE engine and 5-speed automatic transmission.
Warranty Information
Applicable Warranty*:
This repair is covered under the Toyota Federal Emissions 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.