Engine Controls - Driveability Enhancements
ENGINEEG033-07
Title:
ECM CALIBRATION: ENHANCEMENT
TO SHIFTING PERFORMANCE
& SMOOTHNESS
Models:
'05 Avalon
June 20, 2007
Introduction
To enhance shifting performance and smoothness during acceleration, the Engine Control Module/ECM (SAE term: Powertrain Control Module/PCM) calibration has been revised and certain fuel control feedback components have been updated. Please use the following procedure to address customer concerns.
NOTE:
Before proceeding, verify the ECM (PCM) calibration has NOT been updated by checking for the Authorized Modifications Label (shown in Figure 11 of the Repair Procedure).
Applicable Vehicles
^ 2005 model year Avalon vehicles.
Calibration Identification Chart
Warranty Information
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 correction of a problem based upon a customer's specific complaint.
Parts Information
NOTE:
Authorized Modification Labels may be ordered in packages of 25 from the Materials Distribution Center (MDC) through Dealer Daily Dealer Support Materials System or by calling the MDC.
Required Tools & Material
NOTE:
^ Additional Techstream units may be ordered by calling Approved Dealer Equipment (ADE).
^ The Toyota Diagnostic Tester and CAN Interface Module may also be used to perform the service procedures listed in this bulletin.
^ The GR8 Battery Diagnostic Station (P/N 00002-MCGR8) supersedes the Automatic Trickle Charger (P/N 00002-YA122-01) and Fast Battery Chargers (Associated P/N ASE6003 and Christie P/N CAPPDQ). P/N 00002-YA122-01, ASE6003, and CAPPDQ are now obsolete.
Replace Fuel Control Feedback Components
1. Disconnect the bank 1 and bank 2 front pipe assembly from the exhaust manifolds.
A. Remove the heated oxygen sensors.
a. Disconnect the 2 heated oxygen sensor (bank 1 and 2, sensor 2) connectors.
b. Remove the 2 heated oxygen sensors (bank 1 and 2, sensor 2).
B. Remove the front exhaust pipe No.1 support brackets by removing the 2 nuts.
C. Remove the rear exhaust pipe No.1 support bracket by removing the 2 bolts.
D. Remove the exhaust pipe assembly front. (See Figure 1.)
a. Remove the 2 nuts from the exhaust pipe front (left bank exhaust manifold side).
b. Remove the 2 bolts from the exhaust pipe front (right bank exhaust manifold side).
c. Remove the 2 nuts and 2 bolts from the exhaust pipe front (exhaust pipe center side). Then remove the exhaust pipe front.
d. Remove the 3 gaskets from the exhaust pipe front.
E. Remove the exhaust pipe assembly center.
a. Remove the 4 nuts from the 2 exhaust pipe tails.
b. Disconnect the 2 exhaust pipe supports and remove the exhaust pipe center.
c. Remove the 2 gaskets from the exhaust pipe center.
d. Remove the 2 bolts from the exhaust pipe damper.
2. Remove the exhaust manifold sub-assembly RH (bank 1).
A. Disconnect the A/F sensor connector clamp.
B. Uniformly loosen and remove the 6 nuts.
C. Remove the manifold and gasket.
D. Remove the A/F sensor from the manifold and reinstall it into the NEW bank 1 manifold.
3. Install the NEW exhaust manifold sub-assembly RH.
A. Install a NEW gasket as shown in Figure 3.
B. Install the exhaust manifold sub-assembly RH with the 6 nuts.
Torque: 21 N.m (214 kgf.cm, 15 ft.lbf)
4. Remove the exhaust manifold sub-assembly LH.
A. Disconnect the bank 2 A/F sensor connector clamp.
B. Remove the oil level gauge guide sub-assembly.
a. Remove the oil level gauge.
b. Remove the 2 bolts, and the oil level gauge guides No.1 and No.2.
c. Remove the 0-rings from the oil level gauge guide.
C. Remove the manifold stay No.2 by removing the 2 bolts.
D. Remove the exhaust manifold heat insulator No.2 by removing the 3 bolts.
E. Remove the exhaust manifold sub-assembly LH.
a. Uniformly loosen and remove the 6 nuts.
b. Remove the manifold and gasket.
F. Remove the bank 2 NF sensor and reinstall it into the NEW bank 2 A/F manifold.
5. Install the NEW exhaust manifold sub-assembly LH.
A. Install a NEW gasket as shown in Figure 8.
B. Install the exhaust manifold sub-assembly RH with the 6 nuts.
Torque: 21 N.m
(214 kgf.cm, 15 ft.lbf)
C. Install the manifold stay No.2.
D. Install the oil level gauge sub-assembly.
6. Install the exhaust pipe assembly front.
A. Install 3 NEW gaskets to the exhaust pipe fronts.
B. Install the exhaust pipe front to the exhaust manifolds with the 2 nuts and 2 bolts.
Torque: 2 N.m (632 kgf.cm, 46 ft.lbf)
C. Install the exhaust pipe front to the exhaust pipe center with the 2 nuts and 2 bolts.
Torque: 56 N.m (571 kgf.cm, 41 ft.lbf)
7. Replace the sub oxygen sensors.
A. Install the heated oxygen sensor.
a. Install the 2 heated oxygen sensors (bank 1 and 2, sensor 2).
Torque: 44 N.m
(449 kgf.cm, 32 ft.lbf)
b. Connect the 2 heated oxygen sensor (bank 1 and 2, sensor 2) connectors.
B. Check for exhaust gas leaks. If gas IS leaking, tighten the areas necessary to stop the leak. Replace damaged parts as necessary.
8. Replace the vacuum switching valve No.1 assembly.
Recalibrate ECM (PCM)
1. Check for the Authorized Modifications Label affixed to the vehicle in the location shown in Figure 11. 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 Instruction Manual located on TIS, Diagnostics - Battery.
Follow the procedures outlined in TSB No. SS002-07, "Techstream ECU Flash Reprogramming Procedure, " and flash the ECM (PCM) with the NEW calibration file update.
3. Start the engine and warm it up to normal operating temperature before test-driving.
4. Test-drive the vehicle to confirm proper vehicle operation (and proper laser cruise control operation, if so equipped).
5. 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): EG033-07
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.