Exhaust System - Excessive Sulfur Dioxide Odor
ENGINEEG013-04
REVISED
Title:
EXCESSIVE SULFUR DIOXIDE ODOR
Models:
'02 - '04 Camry (2AZ-FE)
May 24, 2004
TSB REVISION NOTICE:
^ April 3, 2007: The OFP in the Warranty Information table has been modified. A new step 3 and Figure 2 have been added to the ECM Reprogram Procedure (regarding removal of the 10A ECU-IG fuse). Previous Figure 2 is now Figure 3.
^ April 26, 2005: The Op Code for "R & R Catalytic Converter Assembly (MTM Only)" has been updated in Warranty Information.
Previous TSB should be discarded.
Introduction
Some customers may complain of excessive sulfur dioxide odor on 2002-2004 model year Camry vehicles equipped with the 2AZ-FE engine under the following conditions:
^ Stop and go driving.
^ Heavy acceleration.
In order to reduce the sulfur dioxide odor, the Electronic Control Module (ECM)
(SAE term: Powertrain Control Module/PCM) fuel cut control logic has been modified and a new catalyst is provided. Follow the repair procedure to reflash the ECM and replace the catalytic converter assembly.
NOTE:
For more complete understanding of the root cause, refer to TSB No. EG003-03 "Sulfur Odor From Exhaust," dated February 24, 2003.
Applicable Vehicles
^ 2002 - 2004 model year Camry vehicles equipped with the 2AZ-FE engine produced BEFORE the Production Change Effective VINs shown below.
Production Change Information
Warranty Information
Applicable Warranty*:
This repair is covered under the Toyota Specified Major Emission Control Component 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
Required SSTs
ECM (PCM) Identification Chart
ECM Reprogram Procedure
1. Check for the Authorized Modification Label affixed to the vehicle in the location shown in Figure 3. If there is no label present, proceed to step 2.
2. Connect the Diagnostic Tester to the vehicle and select ~CURRENT ECU CAL" from the ECU REPROGRAM MAIN MENU." To determine the vehicle's current ECM (PCM) calibration, see Figure 1 below.
3. Remove the 10A ECU-IG fuse from the instrument panel Junction Block (refer to Figure 2 for location). This action prevents possible activation of the ABS relay, resulting in ECM Reprogramming failure.
ECU damage may occur if the 1OA fuse is NOT removed.
4. Proceed to Flash Reprogram the ECM (PCM) by following the procedures in TSB No. SS002-01 titled "ECU Flash Reprogramming Process," for 2001 and later applicable models.
5. Select the proper ECM (PCM) calibration file for the model year vehicle and reprogram the ECM (PCM).
6. Start the engine and warm up the vehicle to normal operating temperatures before test driving.
7. Test drive vehicle to confirm proper operation and to readjust the ECM (PCM) "Learned Values."
^ Drive the vehicle using light to moderate acceleration in mostly stop and go type driving.
^ Allow the vehicle to shift fully through all gears and at various shifter positions.
8. Enter the following information on the Authorized Modification Label shown in Figure 3 using a permanent marker.
^ ECM (PCM) part number.
^ New ECM (PCM) calibration number.
^ Your dealer code.
^ Reprogramming date. This TSB number.
Catalytic Converter Replacement Procedure
Refer to the Technical Information System (TIS) 2002 or 2004 model year Camry Repair Manual: Exhaust Pipe Assy