Canada - Engine Control - ECU Update,Throttle Response/Downshif

Bulletin
0445

Issue Date
2001-05-10

Market
Canada

Reference
EE-01-002

Model
IS300

Year Range
2001

Component
EE

Subject:
THROTTLE RESPONSE AND DOWNSHIFT QUALITY IMPROVEMENTS

To improve throttle response and 5-2 downshift time, the Engine Control Module (ECM) calibration has been revised and the TRAC ECU has been changed.

APPLICABLE VEHICLES: 2001 model year IS300 vehicles.






PRODUCTION CHANGE INFORMATION:






ECU CALIBRATION ID NUMBER:






PART NUMBER INFORMATION:

NOTE:
Authorized Modifications Labels may be ordered in packages of 25 from your Parts Distribution Centre (PDC)

REPAIR PROCEDURE:

Flash Reprogram ECM:

Flash reprogram the Engine ECM (using calibration ID number 35301200) to improve throttle response under the following conditions.
- From a stop (starting out), sudden accelerator pedal application to approximately 25 to 40% opening.
- From coasting at 24 to 40 KMH or at a steady cruise of 24 to 40 KMH, 50 to 70% accelerator pedal application (to cause a 5-2 downshift).

Follow procedures outlined in TSB No. 0435, ECU Flash Reprogramming Process, and flash reprogram the engine ECM with calibration file update 35301200.







After flash reprogramming the ECM, enter the required information on the Authorized Modifications Label and affix it to the vehicle at the location shown.

Replace TRAC ECU:

Replace the TRAC ECU to improve throttle response under the following conditions.
- From a stop (starting out), sudden accelerator pedal application at or near Wide Open Throttle (WOT).
- From low speed, at or near WOT accelerator pedal application while turning.

Remove lower finish panel and related HVAC duct work (below steering column) and access the TRAC ECU.
Remove and replace the TRAC ECU.

NOTE:
Check "Service History" for the affected vehicle to assure that the TRAC ECU has not already been replaced.







REPAIR TIME:

NOTE:
Issue of this Technical Service Bulletin is to ensure that proper repair information is available. IT DOES NOT CONSTITUTE AN AUTHORIZATION FOR REPAIR. Normal provisions of the formal warranty policy, as applicable, will apply.