Engine Controls - MIL ON, DTC P0128 Set

T-SB-0045-13

March 19, 2013

MIL "ON" DTC P0128

Service Category
Vehicle Interior

Section
Meter/Gauge/Display

Market
USA





Applicability

Introduction

Some 2010 - 2011 model year Camry vehicles equipped with a 2AR-FE engine and automatic transmission may exhibit a MIL "ON" condition with Diagnostic Trouble Code (DTC) P0128 (Coolant Temperature Below Thermostat Regulating Temperature). The Engine Control Module/ECM (SAE term: Powertrain Control Module/PCM) logic has been modified to reduce the possibility of this condition occuring. Use the following repair procedure to address this condition.





Calibration Information





Warranty Information





Parts Information





Required Tools & Equipment

Repair Procedure

1. Using Techstream check for stored DTCs. Confirm DTC P0128 is set.

If other DTCs are present this bulletin 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 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 the GR8 Instruction Manual located on the Technical Information System (TIS), Diagnostics - Tools & Equipment - Battery Diagnostics.

Follow the procedures outlined in Service Bulletin No. T-SB-0012-13, "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 bulletin 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.

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