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Emissions - MIL ON/DTC's P0440/P0441/P0446

ENGINE
EG013-03
REVISED

September 29, 2003

Title:
M.I.L. "ON" DTC P0440, P0441 OR P0446

Models:
'00 - '03 Avalon, Camry & Solara,
'01 - '03 Sienna

TSB REVISION NOTICE:
^ December 5, 2003: The Parts Information and Warranty Information tables have been changed.

^ October 16, 2003: The Parts Information table has been changed. The previous versions of this TSB should be discarded.

Introduction

Under certain driving conditions, some 2000-2003 model year Avalon, Camry (NAP only) and Solara vehicles, and some 2001-2003 model year Sienna vehicles may exhibit a M.I.L. "ON" with DTC(s) P0440, P0441 and/or P0446 stored due to an inoperative Canister Closed Valve Vacuum Switching Valve (CCV VSV). The CCV assembly process has been changed to correct this condition.

Applicable Vehicles
^ 2000 - 2003 model year Avalon and Camry (NAP only) vehicles produced BEFORE the Production Change Effective VINs shown below.
^ 2001 - 2003 model year Sienna vehicles.
^ 2000 - 2003 model year Solara vehicles.





Production Change Information





Warranty Information

Applicable Warranty:

This repair is covered under the Toyota Federal Emissions Warranty. This warranty is in effect for 36 months or 36,000 miles, whichever occurs first, from the vehicle's in-service date.

For California, Massachusetts, Maine and Vermont, the Toyota Federal Emissions Warranty is in effect for 36 months or 50,000 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

NOTE:
Additional Diagnostic Tester Kits, Program Cards or SSTs may be ordered by calling SPX-OTC at 1-800-933-8335.

Inspection & Repair Procedure

Test VSV Operation Using Canister Control VSV Active Test on the Toyota Diagnostic Tester





1. Test operation of the Canister Closed Valve VSV using the Toyota Diagnostic Tester Active Test (see screen flow in Figure 1).

NOTE:
Canister Closed Valve (CCV) VSV is referred to as "CAN CTRL VSV" on the Toyota Diagnostic Tester.





2. Locate Canister Closed Valve (CCV) VSV as shown in Figure 2 (or refer to the Technical Information System [TIS] and the SFI section of applicable Repair Manual).

3. Using the Diagnostic Tester Active Test, switch the Canister Closed Valve VSV (CAN CTRL VSV) to ON using the arrow keys.

4. Does the Canister Closed Valve VSV make a "click" noise when switched to ON?

YES ---> Go to Test VSV for Vacuum Leaks".

NO ---> Go to Step 5.

5. Is the wiring harness connector properly connected to the Canister Closed Valve VSV?

YES ---> Go to Step 6.

NO ---> Fix the connector, then return to Step 3.

6. Disconnect the wiring harness connector for the Canister Closed Valve VSV.

7. Using a DVOM test at Pin 1 to a known good ground. Is battery voltage (B+) present at Pin 1 of the Canister Closed Valve VSV connector when the CAN CTRL VSV ACTIVE TEST is switched to ON?

YES ---> Go to Step 8.

NO ---> Perform diagnosis of power circuit.

8. Using a DVOM test at Pin 2 to a known good ground. Is there continuity to ground at Pin 2 of the Canister Closed Valve VSV connector when the CAN CTRL VSV ACTIVE TEST is switched to ON?

YES ---> Replace the Canister Closed Valve VSV.

NO ---> Perform diagnosis of ground circuit.

Test VSV for Vacuum Leaks

1. Locate the vacuum hose going from charcoal canister to the Canister Closed Valve VSV.

2. Remove vacuum hose from the Canister Closed Valve VSV and connect a hand-held vacuum pump using a short length of vacuum hose.

3. Apply at least 10 mm Hg vacuum to the VSV (the vacuum should not hold). Is a vacuum held?

YES ---> Replace the Canister Closed Valve VSV.

NO ---> Go to Step 4.

4. Using the Diagnostic Tester Active Test, switch the Canister Closed Valve VSV (CAN CTRL VSV) to ON using the arrow keys. Apply at least 10 mm Hg vacuum to the VSV. Is a vacuum held for at least 1 minute?

YES ---> Go to Step 5.

NO ---> Replace the Canister Closed Valve VSV.

5. Disconnect the hand-held vacuum pump and reconnect the vacuum hose from the canister to the Canister Closed Valve VSV.

6. Continue diagnosis of the EVAP system. Reference TSB EG005-01, "EVAP System Operation Information."