Engine Controls - ECM Update for Potential Overheating
ENGINEEG037-06
June 15, 2006
Title:
3MZ - FE ENGINE OVERHEATING
Models:
'04 - '06 Solara
Introduction
If the shifter is accidentally placed in the "S" position (manual shift mode) and driven at freeway speeds for extended periods of time in 3rd gear under certain atmospheric conditions, the engine can overheat, causing damage to the engine and transmission. A revised ECM (SAE term: Powertrain Control Module/PCM) calibration has been developed to automatically upshift the transmission to 4th gear in "S" mode to prevent overheating from occurring.
Applicable Vehicles
^ 2004 - 2006 model year Solara vehicles equipped with the V6 engine and produced BEFORE the Production Change Effective VIN shown below.
Production Change Information
Warranty Information
Applicable Warranty:
This repair is covered under the Toyota Powertrain Warranty. This warranty is in effect for 60 months or 60,000 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
NOTE:
Authorized Modification Labels may be ordered in packages of 25 from the Materials Distribution Center (MDC) through Dealer Daily Dealer Support Materials System.
Required SSTs
Calibration Identification Chart
Repair Procedure
1. If the vehicle has been operated under overheating conditions, repair all mechanical components damaged due to engine and transmission overheating.
2. Check for the Authorized Modifications Label affixed to the vehicle in the location shown in Figure 1. Confirm if the ECM (PCM) calibration has been updated. If NOT the latest ECM (PCM) calibration - go to step 3.
3. 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 13.3a software version and may differ from subsequent software versions.
NOTE:
^ If the Calibration ID matches the "Previous Calibration ID" as shown in the Calibration Identification Chart in this TSB, proceed with flash reprogramming.
^ If the Calibration ID matches the "New Calibration ID" as shown in the Calibration Identification Chart, this vehicle has already been programmed.
4. 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 (PCM)
1. Remove the 10A ECU-IG fuse from the driver's side Junction Block assembly. This action prevents possible activation of the ABS relay, resulting in ECM Reprogramming failure.
NOTE:
ECU damage may occur if the 10A fuse is NOT removed.
2. Follow the procedures outlined in TSB No. SS002-01, "ECU Flash Reprogramming Process", and flash the ECM (PCM) with the NEW calibration file update.
3. Reinstall the 10A ECU-IG fuse in the driver's side Junction Block assembly.
4. Follow the procedures outlined in TSB No. EG045-04, "Entering VIN During ECM (PCM) Replacement and/or DTC P0630," and write the VIN to the ECM (PCM).
5. Start the engine and warm it up to normal operating temperature before test driving.
6. Test drive vehicle to confirm proper vehicle operation.
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.