Toyota Tundra (2015 year). Manual — part 2046
CONDITION
TO
A24-49 (MPMP) - R12-3
(MTRB)
Always
Below 1 Ω
ECM
A*1
B*2
Always
10 kΩ or higher
Wire harness between ECM and canister
pump module
C
*1: for 100 L (26.4 US gal) Fuel Tank
*2: for 144 L (38 US gal) Fuel Tank
A
GO TO STEP 47
B
GO TO STEP 46
C
GO TO STEP 41
17.
PERFORM ACTIVE TEST USING TECHSTREAM (PURGE VSV)
(a) Enter the following menus: Powertrain / Engine and ECT /
Active Test / Activate the VSV for Evap Control.
(b) Disconnect the hose (connected to the canister) from the
purge VSV.
(c) Start the engine.
(d) Using the Techstream, turn off the purge VSV (Activate the
VSV for Evap Control: OFF).
(e) Use your finger to confirm that the purge VSV has no suction.
(f) Using the Techstream, turn on the purge VSV (Activate the
VSV for Evap Control: ON).
(g) Use your finger to confirm that the purge VSV has suction.
Result
TEST RESULT
SUSPECTED TROUBLE AREA
PROCEED
TO
No suction when purge
VSV turned OFF, and
suction applied when
turned ON
Blockage in the purge line is
considered (based on result of
step 9):
Problems with EVAP
hose between canister
and purge VSV
Canister (charcoal filter
inside canister) clogged
ECM
A
Leakage is considered (based on
B
3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: EVAP System;...
A
OK
TEST RESULT
SUSPECTED TROUBLE AREA
PROCEED
TO
Leakage from EVAP
line, fuel tank, or
canister assembly
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 - 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
19.
INSPECT CANISTER (CHARCOAL FILTER INSIDE CANISTER)
(a) Check for filter blockage in the canister
.
OK:
No blockages in the canister.
OK
GO TO STEP 49
NG
GO TO STEP 50
3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: EVAP System;...
20.
CHECK FUEL CAP ASSEMBLY
(a) Check that the fuel cap is correctly installed and confirm that the fuel cap meets OEM specifications.
(b) Tighten the fuel cap firmly (only one click sound could be heard).
HINT:
If an EVAP tester is available, check the fuel cap using the Techstream.
(1) Remove the fuel cap and install it onto a fuel cap adapter.
(2) Connect an EVAP tester pump hose to the adapter, and pressurize the 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 cap is
normal.
Result
TEST RESULT
SUSPECTED TROUBLE AREA
PROCEED TO
Fuel cap correctly installed
-
A
Fuel cap loose
Fuel cap improperly installed
Defective fuel cap
Fuel cap does not meet OEM specifications
B
Defective fuel cap
-
B
No fuel cap
-
C
A
GO TO STEP 37
B
GO TO STEP 35
C
GO TO STEP 36
21.
INSPECT PURGE VSV
(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
3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: EVAP System;...
OK
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)
(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
3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: EVAP System;...
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