Engine Controls - Light Throttle Engine Surge

ENGINE
EG017-02

August 30, 2002

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

Models:
'02 Camry (1MZ-FE)

Introduction

Some 2002 model year Camry vehicles equipped with the 1MZ-FE engine may exhibit a surging during light throttle input at speeds between 38 - 42 MPH with lock-up (L/U) "ON". The Engine Control Module (ECM) calibration has been revised to correct this condition.

NOTE:
These calibration files supercede the calibration files found in TSB EG013-01 dated September 7, 2001.

Applicable Vehicles
^ 2002 model year Camry vehicles with 1MZ-FE engine.





ECM Calibration Number Information





Required Tools & Material

NOTE:
Additional Diagnostic Tester Kits, Program Cards or SSTs may be ordered by calling OTC at 1-800-933-8335.





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.





Parts Information

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 no label, proceed to step 2.

B. If the label is present with the calibration ID 53310100 only, 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 ED" 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 the procedures outlined in TSB SS002-01 dated March 9, 2001, 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.

^ 89666-06255 (TMMK), 53310200

^ 89661-3T665 (Tsutsumi), 53310200

B. Your Dealer Code.

C. Reprogramming Date.

D. This TSB number.

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