Emissions System - MIL ON/DTC's P0440/P0441/P0446 Set
ENGINEEG013-02
Title:
M.I.L. "ON" P0440, P0441 & P0446
Models:
'98 - '99 Camry & Solara
July 12, 2002
Introduction
Under certain driving conditions, some 1998 - 1999 model year Camry and Solara vehicles may exhibit a M.I.L. "ON" with DTCs P0440, P0441 and P0446 stored due to an inoperative Vapor Pressure Sensor 3 way Vacuum Switching Valve (VSV). An improved Vapor Pressure Sensor VSV has been developed to correct this condition.
Applicable Vehicles
^ 1998 - 1999 model year Camry & Solara vehicles.
Parts Information
Required Tools & Material
NOTE:
Additional Diagnostic Tester Kits, Program Cards or SSTs may be ordered by calling OTC at 1-800-933-8335.
Warranty Information
Applicable Warranty *:
This repair is covered under the Toyota Comprehensive Warranty. This warranty is in effect for 36 months or 36,000 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.
Inspection & Repair Procedure
Test VSV Operation Using ACTIVE TEST on the Toyota Diagnostic Tester
1. Test operation of the Vapor Pressure Sensor VSV using the Toyota Diagnostic Tester in ACTIVE TEST (see screen flow in Figure 1).
NOTE:
Vapor Pressure Sensor VSV is listed as TANK BYPASS VSV on the Diagnostic Tester.
2. Locate Vapor Pressure Sensor VSV as shown in Figure 2 (or see SFI section of 1998 or 1999 Camry or Solara Repair Manual).
3. Using the Diagnostic Tester ACTIVE TEST switch the Vapor Pressure Sensor VSV (TANK BYPASS VSV) to ON using the arrow keys.
4. Does the Vapor Pressure Sensor 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 Vapor Pressure Sensor VSV?
YES --> Go to Step 6.
NO --> Fix the connector, then return to Step 3.
6. Disconnect the wiring harness connector for the Vapor Pressure Sensor VSV.
7. Using a DVOM test at Pin 1 to a known good ground. (Red wire on Solara, black and yellow wire on Camry).
Is battery voltage (B+) present at Pin 1 of the Vapor Pressure Sensor VSV connector when the TANK BYPASS 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. The ECM provides ground when the VSV is switched ON. (White and red wire on Solara, violet wire on Camry).
Is there continuity to ground at Pin 2 of the Vapor Pressure Sensor VSV connector when the TANK BYPASS VSV ACTIVE TEST is switched to ON?
YES --> Replace the Vapor Pressure Sensor VSV.
NO --> Perform diagnosis of ground circuit.
Test VSV for Vacuum Leaks
1. Locate the vacuum hose going from charcoal canister to Port F of the Vapor Pressure Sensor VSV (see Figure 3).
2. Remove vacuum hose from Port F of the Vapor Pressure Sensor VSV and connect a hand-held vacuum pump to Port F using a short length of vacuum hose.
3. Apply at least 10 mm Hg vacuum to the VSV.
Is a vacuum held for at least 1 minute?
YES --> Go to Step 4.
NO --> Replace the Vapor Pressure Sensor VSV.
4. Disconnect the hand-held vacuum pump and reconnect the vacuum hose from the canister to the Vapor Pressure Sensor VSV.
5. Locate the vacuum hose going from charcoal canister to Port P of the Vapor Pressure Sensor VSV (see Figure 4).
6. Remove the vacuum hose from Port P of the Vapor Pressure Sensor VSV and connect a hand-held vacuum pump to Port P using a short length of vacuum hose.
7. Apply at least 10 mm Hg vacuum to the VSV.
Is a vacuum held for at least 1 minute?
YES --> Go to Step 8.
NO --> Replace the Vapor Pressure Sensor VSV.
8. Disconnect the hand-held vacuum pump and reconnect the vacuum hose from the canister to the Vapor Pressure Sensor VSV.
9. Continue diagnosis of the EVAP system.
Reference TSB EG005-01, "EVAP System Operation Information."