M.I.L. ªONº P0440, P0441 & P0446 ± EG013-02July 12, 2002
Page 3 of 5
2. Locate Vapor Pressure Sensor VSV as shown in Figure 2 (or see SFI section of 1998
or 1999 Camry or Solara Repair Manual).
Charcoal Canister
Vapor Pressure Sensor
VSV Connector
Vapor Pressure Sensor VSV
Figure 2: Vapor Pressure Sensor VSV Components
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 ªclickº noise when switched to ON?
YES Go to ªTest VSV for Vacuum Leaksº (page 4 and 5 of this TSB).
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.
Inspection &
Repair
Procedure
(Continued)
M.I.L. ªONº P0440, P0441 & P0446 ± EG013-02July 12, 2002
Page 4 of 5
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).
Vapor Pressure Sensor
Figure 3
Bracket
Vacuum HoseVacuum Hose
Vapor Pressure Sensor VSV
VSV ConnectorVacuum Hose
PORT F
Charcoal Canister
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.
Inspection &
Repair
Procedure
(Continued)
