Toyota Tundra (2015 year). Manual — part 1678
A
OK
TEST RESULT
SUSPECTED TROUBLE AREA
PROCEED
TO
ECM
Leakage is considered (based on
Leakage from EVAP
line, fuel tank, or
canister assembly
B
Suction applied when
purge VSV turned OFF
Purge VSV stuck open
C
No suction when purge
VSV turned ON
Purge VSV stuck closed
Problems with purge
line between purge
VSV and intake
manifold
D
B
GO TO STEP 20
C
GO TO STEP 21
D
GO TO STEP 23
18.
INSPECT EVAP HOSE (PURGE VSV - CHARCOAL CANISTER ASSEMBLY)
(a) Check for blockages in the EVAP purge line between the purge VSV and charcoal canister assembly.
OK:
No blockages in the EVAP purge line between the purge VSV and canister.
NG
GO TO STEP 45
19.
INSPECT CHARCOAL CANISTER ASSEMBLY (CHARCOAL FILTER INSIDE CHARCOAL
CANISTER ASSEMBLY)
(a) Check for filter blockage in the charcoal canister assembly
.
OK:
3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: EVAP System...
No blockages in the charcoal canister assembly.
OK
GO TO STEP 49
NG
GO TO STEP 50
20.
CHECK FUEL TANK CAP ASSEMBLY
(a) Check that the fuel tank cap is correctly installed and confirm that the fuel tank cap meets OEM
specifications.
(b) Tighten the fuel tank cap firmly (only one click sound could be heard).
HINT:
If an EVAP tester is available, check the fuel tank cap using the Techstream.
(1) Remove the fuel tank cap and install it onto a fuel tank cap adapter.
(2) Connect an EVAP tester pump hose to the adapter, and pressurize the fuel tank cap to 3.2 to 3.7
kPa (gauge) [24 to 28 mmHg (gauge)] using an EVAP tester pump.
(3) Seal the adapter and wait for 2 minutes.
(4) Check the pressure. If the pressure is 2 kPa (gauge) [15 mmHg (gauge)] or more, the fuel tank
cap is normal.
Result
TEST RESULT
SUSPECTED TROUBLE AREA
PROCEED TO
Fuel tank cap correctly installed
-
A
Fuel tank cap loose
Fuel tank cap improperly installed
Defective fuel tank cap
Fuel tank cap does not meet OEM specifications
B
Defective fuel tank cap
-
B
No fuel tank cap
-
C
A
GO TO STEP 37
B
GO TO STEP 35
C
GO TO STEP 36
21.
INSPECT PURGE VSV
3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: EVAP System...
OK
(a) Turn the ignition switch off.
(b) Disconnect the D29 purge VSV connector.
(c) Disconnect the hose (connected to the canister) from the
purge VSV.
(d) Start the engine.
(e) Use your finger to confirm that the purge VSV has no suction.
Result
TEST
RESULT
SUSPECTED TROUBLE AREA
PROCEED
TO
No suction
Wire harness or connector between
purge VSV and ECM (short to
ground)
ECM
A
Suction
applied
Purge VSV
B
A
GO TO STEP 26
B
GO TO STEP 40
22.
INSPECT EVAP HOSE (PURGE VSV - CANISTER)
(a) Check for blockages in the EVAP purge line between the purge VSV and canister.
OK:
No blockages in the EVAP purge line between the purge VSV and canister.
NG
GO TO STEP 45
23.
CHECK EVAP HOSE (PURGE VSV - INTAKE MANIFOLD)
3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: EVAP System...
A
(a) Disconnect the hose (connected to the intake manifold) from
the purge VSV.
(b) Start the engine.
(c) Use your finger to confirm that the hose has suction.
Result
TEST
RESULT
SUSPECTED TROUBLE AREA
PROCEED
TO
Suction
applied
EVAP hose between purge VSV and intake
manifold normal
Purge VSV
Purge VSV power source
ECM
A
No suction
Intake manifold port
EVAP hose between purge VSV and
intake manifold
B
B
GO TO STEP 34
24.
INSPECT PURGE VSV
(a) Remove the purge VSV
.
Result
TEST
RESULT
SUSPECTED TROUBLE AREA
PROCEED
TO
Air flows
Purge VSV normal
Purge VSV power source
Wire harness or connector between
purge VSV and ECM
A
No air flow
Purge VSV
B
B
GO TO STEP 40
3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: EVAP System...
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