EG031-04
August 11, 2004
Title:
M.I.L. ON DTC P0300 (RANDOM MISFIRE) AND/OR P030# (SINGLE CYLINDER MISFIRE)
Models: 03 – 04 Celica (1ZZ-FE, Manual Transmission)
| Introduction | Under certain conditions, some 2003 – 2004 model year Celica vehicles may exhibit M.I.L. ON with DTC P0300 (Random Misfire) and/or P030# (Single Cylinder Misfire).
The Engine Control Module (ECM) (SAE term: Powertrain Control Module/PCM) logic has been modified to correct this condition. |
|---|---|
| Applicable Vehicles |
|
Production Change Information
| MODEL | ENGINE | TRANSMISSION | PRODUCTION CHANGE EFFECTIVE VIN | |||
|---|---|---|---|---|---|---|
| Celica | 1ZZ–FE | Manual | JTDDR3#T#40176236 | |||
Parts Information
| PREVIOUS PART NUMBER | CURRENT PART NUMBER | PART NAME | QTY | ||
|---|---|---|---|---|---|
| 89661-2G381 | 89661-2G382 | Computer, Engine Control | 1 | ||
Required SSTs
| SPECIAL SERVICE TOOLS (SSTs) | PART NUMBER | QUANTITY |
|---|---|---|
Toyota Diagnostic Tester Kit* | 01001271 | 1 |
| 12 Megabyte Diagnostic Tester Program Card with version 10.2a Software (or later)* | 01002593-005 | 1 |
*Essential SSTs.
| NOTE:
Additional Diagnostic Tester Kits, Program Cards or other SSTs may be ordered by calling SPX/OTC at 1-800-933-8335. |
Warranty Information
| OP CODE | DESCRIPTION | TIME | OFP | T1 | T2 |
|---|---|---|---|---|---|
| EG4012 | Connection of Diagnostic Tester and | 0.9 | 89661-2G381 | 8A | 74 |
Applicable Warranty*:
This repair is covered under the Toyota Specified Major Emission Control Component 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.
Repair Procedure
- Should a M.I.L. ON condition with DTC P0300 and/or P030# be encountered, perform diagnostic procedures as described in the Technical Information System (TIS) 2003 or 2004 model year Celica Repair Manual: Diagnostics: Engine (1ZZ-FE): P0300, P0301, P0302, P0303, P0304 Cylinder 4 Misfire Detected (Celica).
- If the problem source cannot be identified after checking all affected areas according to TIS, the cause may be an ECM (PCM) logic malfunction. In this case, replace the ECM (PCM) with the updated part according to TIS:
Approved J2534 Devices only provide reprogramming capabilities and do not support diagnostic scantool functions. For full diagnostic capabilities, please consider TIS Techstream or Techstream Lite
Toyota, Scion, and Lexus ECMs can be reprogrammed with the TIS Techstream, Techstream Lite, Diagnostic Tester, or can also be reprogrammed using a Toyota validated J2534 interface. Vehicle recalibration requires the use of the following:
- Toyota validated J2534 interface
- TIS Professional Level Subscription
- Toyota Calibration Update Wizard software (installed along with Techstream Software)
- Personal Computer running Microsoft Windows XP/2000 or later operating system
Toyota strongly recommends USING ONLY VALIDATED INTERFACE DEVICES that appear on this list.
Toyota works closely with J2534 interface manufacturers to ensure that their hardware works safely and efficiently with our products. Every device listed on this page has been thoroughly tested and validated on Toyota, Scion, and Lexus vehicles.
It is important to understand that only the specific devices, firmware, DLLs and APIs listed here have been tested by Toyota. We do not recommend use of any other J2534 device, firmware, DLL or API that is not listed here. Changes to J2534 hardware/software is outside of Toyota’s control; in some cases, changes made to device hardware/software can negatively impact reprogramming performance. Toyota makes every effort to continue to work with J2534 interface manufacturers to ensure continued product compatibility as our respective products evolve.
J2534 Approved Device Application Chart
| Supplier | Device Name | Version | CUW Version | Supported OS | ||
|---|---|---|---|---|---|---|
| Firmware* | DLL* | API* | ||||
| Bosch Diagnostics | Flasher LT-Import | 01.02.07 | 01.02.07 | 04.04 | 8.8 | B, C, D, E |
| Bosch Diagnostics | Flasher PRO | 01.09.18 | 01.09.18 | 04.04 | 8.8 | B, C, D, E |
| Bosch Diagnostics | Mastertech VCI | 13.0.75.27 | 2.0.75.27 | 04.04 | Testing in Progress | B, C, D, E |
| Dearborn Group | VSI-2534 | 1.112 | 2.05.22 | 04.04 | 8.10 | C, D |
| Drew Technologies | CarDAQ Plus No products found. | 01.09.18 | 01.09.18 | 04.04 | 8.8 | B, C, D, E |
| Drew Technologies | Mongoose MFC No products found. | 01.02.07 | 01.02.07 | 04.04 | 8.8 | B, C, D, E |
| Drew Technologies | Mongoose PRO No products found. | 1.1.12.0 | 1.1.12.0 | 04.04 | 8.16 | A, B, C, D |
| Snap-On | Pass Thru Pro II | 01.09.18 | 01.09.18 | 04.04 | 8.8 | B, C, D, E |
*Original validated firmware/DLL versions may be superceded by the device manufacturer. Contact the device manufacturer if you are unable to find the versions listed above.
Supported Operating Systems
| A | Windows 8 (32-bit; 64-bit) |
| B | Windows 7 (32-bit; 64-bit) |
| C | Windows VISTA Home Basic, Home Premium, Business, Ultimate |
| D | Windows XP Pro SP1 or later |
| E | Windows 2000 SP2 or later |
For more information about the J2534 devices listed above, click on the vendor names. To report compatibility problems with listed hardware/software, please contact the device manufacturer.
Obtaining Calibration Files
The Flash Reprogramming Calibration CD is no longer available.
ECU Calibrations are now available for download directly from TIS. A valid TIS Professional Level subscription is required to access Calibration files. These files are compatible with the above mentioned scantools and J2534 interfaces. The Calibration page, located on the Diagnostics tab in the TIS site, contains all the most current vehicle calibration files, applicable Service Bulletins, and instructions for use. Select the following link for step by step instructions to access this page.
Note: Calibration Update Software is now included in the Techstream Software Installer. A valid TIS Professional Level subscription is required to download and install Techstream Software.
Last update on 2026-06-17 / Affiliate links / Images from Amazon Product Advertising API
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