Toyota Tundra (2015 year). Manual — part 1298
(a) Check the EVAP pressure in step 4/6.
Result
DTC*1
TEST RESULT
SUSPECTED TROUBLE AREA
PROCEED
TO
-
EVAP pressure increases by 0.3 kPa-g (2.25
Not yet determined
A
P0441*2
EVAP pressure increases by 0.3 kPa-g (2.25
Purge VSV
Purge VSV circuit
Problems in EVAP hose
between purge VSV and
intake manifold
Problems in EVAP hose
between canister and purge
VSV
ECM
B
P0441
Variation in EVAP pressure less than 0.3 kPa-g
(2.25 mmHg-g) for 10 seconds after proceeding
from step 3/6 to step 4/6
Purge VSV stuck closed
Purge VSV circuit
Canister (charcoal filter
inside canister) clogged
Problems in EVAP hose
between purge VSV and
intake manifold
Problems in EVAP hose
C
1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: EVAP System;...
A
DTC*1
TEST RESULT
SUSPECTED TROUBLE AREA
PROCEED
TO
between canister and purge
VSV
ECM
*1: These DTCs are already stored in the ECM when the vehicle arrives and are confirmed in the Confirm
DTC procedures above.
*2: This result suggests that due to purge line blockage or purge VSV malfunction, the DTC was stored
by the purge flow monitor while the engine was running, or that key-off monitor test result were nearly
borderline values.
B
GO TO STEP 22
C
GO TO STEP 17
10.
PERFORM EVAPORATIVE SYSTEM CHECK (STEP 5/6)
(a) Check the EVAP pressure in step 5/6.
1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: EVAP System;...
(b) Compare the EVAP pressure from step 3/6 and the second reference pressure (step 5/6).
Result
DTC*
TEST RESULT
SUSPECTED TROUBLE AREA
PROCEED
TO
-
EVAP pressure (step 3/6) lower than second
reference pressure (step 5/6)
Not yet determined (no leakage
from EVAP system)
A
P0441 and
P0455
EVAP pressure (step 3/6) higher than [second
reference pressure (step 5/6) x 0.2]
Purge VSV stuck open
EVAP gross leak
B
P0456
EVAP pressure (step 3/6) higher than second
reference pressure (step 5/6)
EVAP small leak
B
*: These DTCs are already stored in the ECM when the vehicle arrives and are confirmed in the Confirm DTC
procedures above.
A
GO TO STEP 43
B
GO TO STEP 17
11.
PERFORM EVAPORATIVE SYSTEM CHECK (STEP 3/6)
(a) Check the EVAP pressure in step 3/6.
1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: EVAP System;...
Result
DTC*
TEST RESULT
SUSPECTED TROUBLE AREA
PROCEED
TO
P043F
EVAP pressure less than [reference pressure] measured in step
2/6
Reference orifice high-flow
A
P2401
EVAP pressure almost same as [reference pressure] measured
in step 2/6
Leak detection pump stuck
OFF
B
*: These DTCs are already stored in the ECM when the vehicle arrives and are confirmed in the Confirm DTC
procedures above.
HINT:
The first reference pressure is the value determined in step 2/6.
A
GO TO STEP 38
B
GO TO STEP 31
12.
INSPECT CANISTER PUMP MODULE (CANISTER PRESSURE SENSOR CIRCUIT)
(a) Check the canister pressure sensor circuit, referring to DTC P0451 canister pressure sensor circuit
inspection procedure
.
NEXT
GO TO STEP 49
13.
INSPECT CANISTER PUMP MODULE (VENT VALVE OPERATION)
(a) Turn the ignition switch off.
(b) Disconnect the R12 canister pump module connector.
(d) Touch the canister pump module to confirm the vent valve
operation.
Result
CONDITION
TESTER
RESULT
SUSPECTED TROUBLE AREA
PROCEED
TO
Apply battery
voltage to
terminals VLVB
and VGND
Operating
Wire harness or
connector between
vent valve and ECM
Leak detection pump
A
1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: EVAP System;...
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