Engine Controls - MIL ON/DTC's P0300-P0306 On Cold Start
T-SB-0210-11December 23, 2011
MIL "ON" DTC P030 # at Cold Startup
Service Category
Engine/Hybrid System
Section
Engine Control
Market
USA
Applicability
Introduction
Some 2008 - 2010 model year Highlander HV vehicles may exhibit a MIL "ON" condition with one or more engine misfire DTCs P0300 - P0306 present. The stored DTC(s) would be detected during the initial 45 seconds of engine run time following a cold soak. The Engine Control Module/ECM (SAE: term: Powertrain Control Module/PCM) logic has been modified to reduce the possibility of this condition occurring. Please follow the repair procedure below to address this condition.
Warranty Information
Calibration Information
Parts Information
Required Tools & Equipment
Repair Procedure
1. Using TIS Techstream check for stored DTCs. Confirm any of the following DTCs are present and were detected during the initial 45 seconds of engine run time:
^ P0300 - Random/Multiple Cylinder Misfire Detected
^ P0301 - Cylinder 1 Misfire Detected
^ P0302 - Cylinder 2 Misfire Detected
^ P0303 - Cylinder 3 Misfire Detected
^ P0304 - Cylinder 4 Misfire Detected
^ P0305 - Cylinder 5 Misfire Detected
^ P0306 - Cylinder 6 Misfire Detected
If other DTCs are present or the DTC was detected after 45 seconds of engine run time, this TSB does NOT apply. Continue diagnosis per Repair Manual procedures.
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 the calibration ID listed is NOT the latest ECM (PCM) calibration - go to step 4.
3. Flash reprogram the ECM (PCM).
NOTE
^ The GR8 Battery Diagnostic Station MUST be used in Power Supply Mode to maintain battery voltage at 13.5 volts while flash reprogramming the vehicle.
^ For details on how to use the GR8 Battery Diagnostic Station, refer to the GR8 Instruction Manual located on the Technical Information System (TIS), Diagnostics - Tools & Equipment - Battery Diagnostics.
Follow the procedures outlined in TSB No. T-SB-064-10, "Techstream ECU Flash Reprogramming Procedure", and flash the ECM (PCM) with the NEW calibration file update.
4. Install the Authorized Modifications Label.
A. Using a permanent marker enter the following information on the label:
^ ECM part number [Refer to the Parts Information section for the CURRENT PART NUMBER]
^ Calibration ID(s) [Refer to the Calibration Identification Chart for the NEW CALIBRATION ID]
^ Dealer Code
^ Repair Date
^ Change Authority [This TSB number]
B. Affix the Authorized Modifications Label to the vehicle at the location shown in Figure 1. The Authorized Modifications Label is available through the MDC P/N 00451-00001-LBL.
5. Test drive the vehicle to confirm proper vehicle operation.