Canada - Engine Controls - Surge on Light Throttle Application

Bulletin
1235

Issue Date
2003-05-26

Reference
EE-03-004

Model
Camry

Year Range
2003

Market
Canada

Component
EE


Subject: ECM CALIBRATION UPDATE - 1MZ-FE ENGINE SURGING

Some 2003 model year Camry vehicles equipped with the 1MZ FE engine may exhibit a surging during light throttle input at speeds between 60 - 65 KPH with lock up (L/U) "ON". The Engine Control Module (ECM) calibration has been revised to correct this condition.

APPLICABLE VEHICLES: 2003 model year Camry vehicles with 1MZ-FE engine.







PRODUCTION CHANGE INFORMATION:

ECM CALIBRATION NUMBER INFORMATION:







2003 MY:







REQUIRED TOOLS & MATERIAL:

PARTS INFORMATION:







2003 MY:

REPAIR PROCEDURE:

Verify Vehicle Condition based on customer complaint.Once condition is confirmed, proceed to Step 1.
1. Check for Authorized Modification Label affixed to vehicle in location as shown in Figure 2.
a) If there is a label with the calibration 53325100 no further action is required.
b) If there is a label with the calibration ID 53325000, proceed to step 2.
c) If there is no label, proceed 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 1).

NOTE:
- If calibration ID matches "Previous Calibration ID" as shown, proceed with flash reprogramming.
- If calibration ID matches "New Calibration ID" as shown, this vehicle has already been reprogrammed.

Flash Reprogram ECM
1. Follow procedures outlined in TSB # 1204, Ref.# GI-03-007 ECU Flash Reprogramming Process.
2. Select proper ECM calibration file for the vehicle model and reprogram ECM.
3. After flash reprogramming ECM, enter the following information on the Authorized Modifications Label using a permanent marker.
a) ECU Part Number and new Calibration ID.
2003 MY
- 89666 33431, 53325100

b) Your Dealer Code
c) Reprogramming Date.







4. Attach the Authorized Modifications Label to the underside of the engine hood as shown.







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.