Canada - Engine Control - ECM Calibration, Shifting Concerns
Bulletin
TSB0623R
Issue Date
September 10, 2003
Market
Canada
Title
ECM CALIBRATION: SHIFT FEELING ENHANCEMENT
Component
AUTOMATIC TRANSMISSION & TRANSAXLE
Models
'04 - '05 RX330
REVISION NOTICE:
- February 02, 2006:
- The Calibration Identification Chart has been updated to include ALL 2005 model year RX 330 calibration IDs. Previous versions of this TSB would not allow updating of RX 330 vehicles built in the later part of 2005 model year.
NOTE: If a vehicle has already been reprogrammed following a previous version of TSB No. 0623, further updates are NOT required.
- A note has been added at the beginning of Repair Procedure step 4 regarding connection of a battery charger during reprogramming.
- OFPs have been updated in Warranty Information.
- September 26, 2005: The Previous Calibration IDs have been updated in the Calibration Identification Chart.
- May 18, 2005: The following changes have been implemented since first publication: 2005 model year RX 330 vehicles added to Applicable Vehicles. Introduction and Note updated. Calibration Identification Chart updated to include 2005 model year RX 330 calibration IDs.
Previous versions of this TSB should be discarded.
INTRODUCTION:
To improve the transmission shift feeling during specific operating modes, the Engine Control Module (ECM) (SAE term: Powertrain Control Module/PCM) calibration has been revised. These improvements include:
- Reduced downshift lag when accelerating at speeds from 16 to 32 kmh.
- Less gear hunting when driving on/off accelerator pedal at 32 to 48 kmh (for example: during heavy rush-hour traffic).
- Improved response rate during heavy acceleration from a stop.
NOTE:
- Version 13.2a or later Diagnostic Tester software is required to perform this procedure.
- 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).
- Harsh ATM shifting may result if any Repair Procedure steps are omitted (specifically steps 5 and 11).
APPLICABLE VEHICLES:
- 2004 - 2005 model year RX330 vehicles.
WARRANTY INFORMATION:
PARTS INFORMATION:
REQUIRED SSTs:
ECM CALIBRATION NUMBER INFORMATION:
NOTE:
- 2004 model year RX 330 vehicles, which have been flash reprogrammed using the procedures in this TSB will contain upgraded 2005 model year OBD II logic and will require VIN input. Refer to the 2005 model year RX 330 Repair Manual information on ETAS when checking Powertrain Diagnostic Trouble Codes (DTCs) on 2004 model year RX 330 vehicles that have been reprogrammed.
- Calibration files on the Diagnostic Tester use the following abbreviations:
- Seq = Sequential Shift Transmission
- Gate = Gate Shift Transmission
REPAIR PROCEDURE:
1. Check for the Authorized Modifications Label affixed to the vehicle in the location shown in Figure 1. Confirm if ECM (PCM) calibration has been updated. If not latest ECM (PCM) calibration - go to step 2.
2. Connect the Diagnostic Tester to the vehicle and select CURRENT ECU CAL from the ECU REPROGRAM MAIN MENU. Determine the vehicle's current ECU calibration (see Figure 2).
- The sample screen prints seen are the 13.2a software version, and may differ from subsequent software versions.
NOTE:
- If Calibration ID matches "Previous Calibration ID" as shown in Calibration Identification Chart, proceed with flash reprogramming.
- If Calibration ID matches "New Calibration ID" as shown as shown in Calibration Identification Chart, this vehicle has already been reprogrammed. Refer to ETAS for diagnostic procedures applicable to any stored DTCs.
3. If ECU calibration ID is not the same as the "New Calibration ID" listed previously, proceed to Flash Reprogram ECM.
4. Flash Reprogram ECM
NOTE:
A battery charger MUST be connected to the battery and set at a medium charge setting during the Flash Reprogram procedure in order to maintain proper battery voltage and prevent damage to the ECM (PCM).
Follow the procedures outlined in TSB No. 2064, "ECU Flash Reprogramming Process" and flash the ECM with new calibration file updates.
NOTE:
If the "Check Engine" light is ON when the ignition is turned back on to begin the reprogramming process, a scan tool cable problem exists. Refer to TSB No. 2064, "ECU Flash Reprogramming Process."
5. Reset the ECM learned values using the diagnostic tester. Refer to the procedures below.
- The sample screen prints seen are the 13.2a software version, and may differ from subsequent software versions.
NOTE:
Failure to reset the ECM memory will result in continued ATM shifting complaints.
6. Follow the procedures outlined in TSB No. 2046, "Entering VIN During ECM (PCM) Replacement and/or DTC P0630," and write the VIN to the ECM (PCM).
7. Start the engine and warm it up to normal operating temperature before test-driving.
8. Test drive vehicle to confirm proper vehicle operation.
9. Enter the required information on the Authorized Modifications Label and affix it to the vehicle at the location shown in Figure 1. The Authorized Modifications Label is available through the PDC, P/N-00451-00001-25
10. Calibration update is complete.
NOTE:
- Select premium unleaded gasoline with an Octane Rating of 91 (Research Octane Number 96) or higher for optimum engine performance.
- Effect of the new calibration may become more apparent after several days of driving as the ECM's learned values' are established from the customer's driving habits.
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.