A/T - Poor Shift Quality
TRANSMISSION & CLUTCHTC008-03
November 14, 2003
Title:
ECM CALIBRATION: SHIFTING ENHANCEMENT (1MZ-FE, 5-SPEED A/T)
Models:
'03 Camry
Introduction
To enhance ATM shifting, the Engine Control Module (SAE term: Powertrain Control Module/PCM) calibration has been updated.
NOTE:
^ Version 10.1a 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 will result if any Repair Procedure steps are omitted (specifically steps 4 and 6).
Applicable Vehicles
^ 2003 model year Camry vehicles equipped with 1MZ-FE Engine and 5-Speed Automatic Transmission (ATM).
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.
Required SSTs
NOTE:
Additional Diagnostic Tester Kits, Program Cards or SSTs may be ordered by calling SPX-OTC at 1-800-933-8335.
Calibration Identification Chart
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 shown are the 10.2a 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 in Calibration Identification Chart, this vehicle has already been programmed. Refer to Repair Manual for diagnosis.
3. If ECU calibration ID is not the same as the New Calibration ID" listed previously, proceed to Flash Reprogram ECM (PCM).
Flash Reprogram Procedure
Flash Reprogram ECM
1. Remove the 10A ECU-IG fuse from the Instrument Panel Junction Block assembly. This action prevents possible activation of the ABS relay, resulting in ECM Reprogramming failure.
NOTE:
ECU damage may occur if 10A fuse is NOT removed.
2. Follow the procedures outlined in Toyota TSB No. SS002-01, "ECU Flash Reprogramming Process," and flash the ECM (PCM) with new calibration file update.
3. Reinstall the 10A ECU-IG fuse in the Instrument Panel Junction Block assembly.
4. Reset the ECM (PCM) learned values using the Diagnostic Tester. Refer to the procedures below.
- The sample screen prints shown are the 10.2a software version, and may differ from subsequent software versions.
NOTE:
Failure to reset the ECM memory will result in continued ATM shifting concerns.
5. Start the engine and warm it up to normal operating temperature before test-driving.
6. Test drive vehicle to confirm proper vehicle operation and to readjust the ECM "Learned Values." Drive the vehicle using light to moderate acceleration. Allow the vehicle to shift fully through all the gears, and at various shifter positions (D, 4, 3, 2, 1).
7. 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 MDC, P/N 00451-00001-LBL.
8. Calibration update is complete.
NOTE:
The effect of the new calibration may become more apparent after several days of driving as the ECM (PCM) "learned values" are reestablished from the customer's driving.