Canada - Engine Control - ECM Calibration for Low Speed Shiftin
BulletinTSB2062R
Issue Date
December 08, 2004
Title
ECM CALIBRATION: SHIFTING ENHANCEMENT
Component
AUTOMATIC TRANSMISSION & TRANSAXLE
Models
'04 - '05 LS 430
TSB REVISION NOTICE:
- October 12, 2005: Warranty Information has been revised.
Previous versions of TSB should be discarded.
INTRODUCTION:
To enhance low speed ATM shifting, the Engine Control Module or ECM (SAE term: Powertrain Control Module/PCM) calibration has been updated.
APPLICABLE VEHICLES:
- 2004 model year LS 430 vehicles.
- 2005 model year LS 430 vehicles produced BEFORE the Production Change Effective VINs shown below.
PRODUCTION CHANGE INFORMATION:
CALIBRATION IDENTIFICATION INFORMATION:
WARRANTY INFORMATION:
PARTS INFORMATION:
REQUIRED SSTs:
REPAIR PROCEDURES:
1. Check for the Authorized Modification Label affixed to the vehicle in the location shown in Figure 1. Confirm that the ECM (PCM) calibration has been updated. If not the 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 12.0a 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 in Calibration Identification chart, this vehicle has already been reprogrammed.
3. If ECU calibration ID is not the same as the "New Calibration ID" listed previously, proceed to Flash Reprogram ECM (PCM).
FLASH REPROGRAM ECM:
CAUTION:
When reprogramming the LS 430, 12.01a production version or later MUST be used. Using any previous versions of software for reprogramming may result in IRREPARABLE DAMAGE to the ECU!
NOTE:
- If the "Check Engine" light is ON when ignition is turned back on to begin the reprogramming process, a scan tool cable problem exists. Refer to TSB0449, "ECU Flash Reprogramming Error Message."
- When reprogramming the LS 430 for this issue, calibration files for 2004 and 2005 model year cannot exist on the same Diagnostic Tester Program Card.
- If necessary, delete previous calibrations from the Diagnostic Tester Program Card before downloading the new calibration file.
- With this calibration update, 2004 model year vehicles are updated to 2005 model year logic. When diagnosing powertrain-related M.I.L. "ON" or performance issues, refer to the 2005 LS 430 Repair Manual for both 2004 and 2005 model year vehicles.
- 2004 model year vehicles require VIN registration following reprogramming to prevent M.I.L. "ON" (P0630).
1. Disconnect the radiator fan connectors, and connect a battery charger to the vehicle's battery. This will avoid voltage variations that can permanently damage the ECM (PCM) during the reprogramming process.
2. Follow the procedures outlined in TSB2065, "ECU Flash Reprogramming Process," and flash the ECM (PCM) with new calibration file update.
3. Reconnect the radiator fan connectors, and disconnect the battery charger.
4. 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.
5. Enter VIN of vehicle in ECM memory. Refer to procedures outlined in TSB2046, "Entering VIN During ECM (PCM) Replacement and/or DTC P0630.
6. Start the engine and warm it up to normal operating temperatures before test-driving.
7. Perform a thorough test drive with several accelerations from a stop with "light throttle" application until proper transmission shifting is verified.
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.