Canada - Engine Controls - Engine RPM Decrease Above 40 MPH

Bulletin
T-TCI-3605

Issue Date
September 7, 2011

Market
Canada

Title
MOMENTARY RPM DECREASE ABOVE 65 KPH (40 MPH) AND/OR REDUCED ENGINE BRAKING

Service Category
Engine/Hybrid System

Section
Engine Control

Market
Canada






APPLICABILITY:

INTRODUCTION:

Some 2011 Corolla or Matrix vehicles may exhibit one or both of the following conditions as a result of fuel cut logic:
- Momentary engine RPM decrease (300 - 700 RPM) while cruising at speeds above 65 KPH (40 mph).
- A feeling of reduced or slightly delayed engine braking when releasing the accelerator pedal at highway speeds.

Follow the repair procedure in this bulletin to address this condition.






WARRANTY INFORMATION:






CALIBRATION INFORMATION:






PARTS INFORMATION:

NOTE
- The ECM (PCM) should NOT be replaced as part of the repair procedure.
- Authorized Modification Labels may be ordered in packages of 25 from your facing PDC.

REQUIRED TOOLS & EQUIPMENT:

REPAIR PROCEDURE:







1. 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 2.
2. 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 Battery Diagnostic Station Instruction Manual located on ETAS/TIS library > Tools > tools and equipment > GR8 Battery Diagnostic Station Instruction Manual.

Follow the procedures outlined in TSB No. TSB2758, "Techstream ECU Flash Reprogramming Procedure", and flash the ECM (PCM) with the NEW calibration file update.

3. Install the Authorized Modifications Label.
A. Using a permanent marker, enter the following information on the label:
- HV ECU 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 your facing PDC, P/N 00451-00001-25.

4. Test drive the vehicle to confirm proper vehicle operation.

NOTE:
Issue of this Technical Service Bulletin is to ensure that proper repair information is available. IT DOES NOT CONSTITUTE AN AUTHORIZATION FOR REPAIR. Normal provisions of the formal warranty policy, as applicable, will apply.