Engine Controls - MIL ON/DTC P0456 Set
T-SB-0165-10June 29, 2010
MIL "ON" DTC P0456
Service Category
Engine/Hybrid System
Section
Engine Control
Market
USA
Applicability
Introduction
Some 2009 - 2010 model year Corolla and Matrix vehicles with a 2AZ engine may exhibit a MIL "ON" condition with Diagnostic Trouble Code (DTC) P0456 - Evaporative Emission Control System Leak Detected (Very Small Leak). The Engine Control Module/ECM (SAE term: Powertrain Control Module/PCM) logic has been modified to reduce the possibility of this condition occurring. Use the following repair procedure to address this condition.
Warranty Information
APPLICABLE WARRANTY
^ This repair is covered under the Toyota Federal Emission 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 occurrence of the specified condition described in this bulletin.
Parts Information
Calibration Information
Required Tools & Equipment
Repair Procedure
1. Using TIS Techstream check for stored DTCs. If only DTC P0456 is present proceed to step 2.
2. Clear DTCs.
3. Confirm if the fuel cap is loose. If it is loose tighten the cap and finish the repair. If it is not loose go to step 4.
4. 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 5.
5. Flash reprogram the ECM (PCM).
^ 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 - Battery.
Follow the procedures outlined in TSB No. T-SB-0064-10, "Techstream ECU Flash Reprogramming Procedure, and flash the ECM (PCM) with the NEW calibration file update.
6. 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.
7. Using Techstream run the Automatic EVAP System check.
System Select > Engine and ECT > Utility > EVAP System
^ PASS - Repair is complete.
^ FAIL - Refer to the Repair Manual for EVAP system diagnosis.
Refer to the Technical Information System (TIS) 2009 model year Corolla or Matrix Repair Manual:
^ 2009 / 2010 Corolla:
Engine/Hybrid System - Engine Control - '2AZ-FE Engine Control: SFI
System: EVAP System"
^ 2009 / 2010 Matrix:
Engine/Hybrid System - Engine Control - '2AZ-FE Engine Control: SFI System: EVAP System"
8. Test drive the vehicle to confirm proper vehicle operation.