Toyota Sequoia (2005). Manual — part 171
B17419
Hose
Purge VSV
B17420
Hose
Purge VSV
–
DIAGNOSTICS
ENGINE
DI–479
673
14
Inspect EVAP VSV.
PREPARATION:
(a)
Turn the ignition switch to OFF.
(b)
Disconnect the V4 purge VSV connector.
(c)
Disconnect the hose (connected to the canister) from the
purge VSV.
(d)
Start the engine.
CHECK:
Use your finger to confirm that the purge VSV has no suction.
RESULT:
Test Results
Suspected Trouble Areas
Proceed To
No suction
ECM
A
Suction applied
Purge VSV
B
A
Go to step 34.
B
Go to step 30.
15
Check EVAP hose between purge VSV and throttle body.
PREPARATION:
(a)
Disconnect the hose (connected to the throttle body) from
the purge VSV.
(b)
Start the engine.
CHECK:
(a)
Use your finger to confirm that the hose has suction.
RESULT:
Test Results
Suspected Trouble Areas
Proceed To
Suction applied
EVAP hose between purge VSV and throttle body
normal
A
No suction
Throttle body
EVAP hose between purge VSV and throttle
body
B
B
Go to step 26.
A
B02272
Battery
Air
B17440
Wire Harness Side:
Purge VSV Connector
V4
Front View
DI–480
–
DIAGNOSTICS
ENGINE
674
16
Inspect EVAP VSV.
PREPARATION:
(a)
Remove the purge VSV.
(b)
Apply battery voltage to the terminals of the purge VSV.
CHECK:
Using an air gun, confirm that air flows from port A to port B.
RESULT:
Test Results
Suspected Trouble Areas
Proceed To
Suction applied
EVAP hose between purge VSV and throttle body
normal
A
No suction
Throttle body
EVAP hose between purge VSV and throttle
body
B
B
Go to step 31.
A
17
Measure purge VSV terminal voltage.
PREPARATION:
(a)
Disconnect the V4 purge VSV connector.
(b)
Turn the ignition switch to ON.
CHECK:
(a)
Measure the voltage between terminal 1 of the purge VSV
connector and the body ground.
RESULT:
Test Results
Suspected Trouble Areas
Proceed To
Between 11 V and 14 V
Normal
A
Other than result above
Wire harness or connectors between purge VSV
and ECM
B
B
Go to step 32.
A
B17412
PRG
E8
B17440
Wire Harness Side:
Purge VSV Connector
V4
Front View
B17411
VPMP
E4
–
DIAGNOSTICS
ENGINE
DI–481
675
18
Check for open and short circuit in harness and connector between purge VSV
and ECM.
PREPARATION:
Disconnect the E8 ECM connector and the V4 purge VSV con-
nector.
CHECK:
Check the resistance.
OK:
Standard:
Tester Connections
Specified Conditions
E8–34 (PRG) – V4–1
Below 1
Ω
E8–34 (PRG) – Body ground
10 k
Ω
or higher
V4–1 – Body ground
10 k
Ω
or higher
OK
Go to step 35.
NG
Go to step 32.
19
Perform active test for vent valve.
PREPARATION:
(a)
Turn the ignition switch to ON.
(b)
On the hand–held tester, select the following menu items:
DIAGNOSIS/ ENHANCED OBD II/ ACTIVE TEST/ VENT
VALVE (ALONE).
CHECK:
Measure the voltage between terminal VPMP of the ECM con-
nector and the body ground when the vent valve is turned ON
(close) and OFF (vent) using the tester.
RESULT:
Test Results
Suspected Trouble Areas
Proceed To
Between 9 V and 14 V when OFF
Below 3 V when ON
Vent valve
A
Below 3 V when OFF and ON
ECM
B
A
Go to step 22.
B
Go to step 35.
B17411
VPMP
E4
DI–482
–
DIAGNOSTICS
ENGINE
676
20
Perform active test for vent valve.
PREPARATION:
(a)
Turn the ignition switch to ON.
(b)
On the hand–held tester, select the following menu items:
DIAGNOSIS/ ENHANCED OBD II/ ACTIVE TEST/ VENT
VALVE (ALONE).
CHECK:
Measure the voltage between terminal VPMP of the ECM con-
nector and the body ground when the vent valve is turned ON
(close) and OFF (vent) using the tester.
RESULT:
Test Results
Suspected Trouble Areas
Proceed To
Below 3 V when OFF and ON
Power source of vent valve
A
Between 9 V and 14 V when OFF
Below 3 V when ON
Vent valve
B
Between 9 V and 14 V when OFF and ON
ECM
C
B
Go to step 24.
C
Go to step 35.
A
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