Canada - Engine Controls - ECM Update For Shifting Improvement

Bulletin
1314

Issue Date
2003-11-13

Reference
AT-03-006

Model
Camry

Year Range
2003

Market
Canada

Component
AT

Subject:
ECM CALIBRATION UPDATE: SHIFTING ENHANCEMENT (1MZ-FE, 5-SPEED A/T)

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 2 and 4).

APPLICABLE VEHICLES:
- 2003 model year Camry vehicles equipped with 1MZ--FE Engine and 5 Speed Automatic Transmission (ATM).







REQUIRED SSTs:







WARRANTY INFORMATION:







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 seen below 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 ECM reprogramming.
- If Calibration ID matches "New Calibration ID" as shown in Calibration Identification Chart, this vehicle has already been reprogrammed. 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 Reprogramming 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 GI-03-007 "How To Download TDT Software Versions and Calibration Files" dated February 4, 2003 and reprogram 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 seen below are the 10.1 software version, and may differ from subsequent software versions.







NOTE:
Failure to reset the ECM memory will result in continued ATM shifting complaints.

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 PDC, P/N 00451 00001-25.
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.

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.