Engine Controls - MIL ON/DTC P011B Stored
T-SB-0202-11December 22, 2011
MIL "ON" DTC P011B with Block Heater Installed on 2TR-FE Engine
Service Category
Engine/Hybrid System
Section
Engine Control
Market
USA
Applicability
Introduction
Some 2007 - 2010 model year Tacoma vehicles equipped with a block heater may exhibit a MIL "ON" condition with DTC P011B (Engine Coolant Temperature / Intake Air Temperature Correlation) after the vehicle cold soaks with block heater use. The Engine Control Module/ECM (SAE term: Powertrain Control Module/PCM) logic has been modified to address this condition.
Production Change Information
This TSB applies to vehicles produced BEFORE the Production Change Effective VIN shown.
Warranty Information
Parts Information
Calibration Information
Required Tools & Equipment
Repair Procedure
1. Using TIS Techstream check for stored DTCs. Only if DTC Poll B is present proceed to step 2.
NOTE
If there is NO block heater installed in the vehicle, this TSB does NOT apply. Continue diagnosis per the Repair Manual to isolate the cause of the condition.
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 3.
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 theGR8 Instruction Manual located on the Technical Information System (TIS), Diagnostics - Tools & Equipment - Battery Diagnostics.
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.
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. Start the engine and warm it up to normal operating temperature and test drive to confirm proper vehicle operation.