Toyota Tundra (2015 year). Manual — part 1677
A
GO TO STEP 44
B
GO TO STEP 17
11.
PERFORM EVAP SYSTEM CHECK (STEP 3/6)
*1: for 100 L (26.4 US gal) Fuel Tank
*2: for 144 L (38 US gal) Fuel Tank
(a) Check the EVAP pressure in step 3/6.
Result
DTCS*1
TEST RESULT
SUSPECTED TROUBLE AREA
PROCEED
TO
P043F
EVAP pressure less than [reference pressure] measured at
2/6
Reference orifice high-flow
A*2
B*3
P2401
EVAP pressure almost same as [reference pressure]
measured at 2/6
Leak detection pump stuck
OFF
C
*1: These DTCs are already present in the ECM when the vehicle arrives and are confirmed in the "CONFIRM DTC"
procedures above.
*2: for 100 L (26.4 US gal) Fuel Tank
*3: for 144 L (38 US gal) Fuel Tank
HINT:
The first reference pressure is the value determined in step 2/6.
3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: EVAP System...
A
A
GO TO STEP 38
B
GO TO STEP 39
C
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 51
13.
INSPECT CANISTER PUMP MODULE (VENT VALVE OPERATION)
(a) Turn the ignition switch off.
(b) Disconnect the R12 canister pump module connector.
(c) Apply the battery voltage to 5 (VLVB) and 1 (VGND) terminals
operation.
Result
TEST
RESULT
SUSPECTED TROUBLE AREA
PROCEED
TO
Operating
Wire harness between vent valve
and ECM
ECM
A
Not
operating
Vent valve
B*1
C*2
*1: for 100 L (26.4 US gal) Fuel Tank
*2: for 144 L (38 US gal) Fuel Tank
B
GO TO STEP 38
C
GO TO STEP 39
3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: EVAP System...
A
A
14.
CHECK HARNESS AND CONNECTOR (ECM - CANISTER PUMP MODULE)
(a) Disconnect the A24 ECM connector.
(b) Disconnect the R12 canister pump module connector.
(c) Measure the resistance according to the value(s) in the table below.
Result
TESTER CONNECTION
CONDITION
SPECIFIED
CONDITION
SUSPECTED TROUBLE AREA
PROCEED
TO
A24-30 (VPMP) - R12-1
(VGND)
Always
Below 1 Ω
ECM
A
Always
10 kΩ or higher
Wire harness between ECM and canister
pump module
B
B
GO TO STEP 41
15.
CHECK HARNESS AND CONNECTOR (CANISTER PUMP MODULE - BODY GROUND)
(a) Turn the ignition switch off.
(b) Disconnect the R12 canister pump module connector.
(c) Measure the resistance according to the value(s) in the table below.
Result
TESTER CONNECTION
CONDITION
SPECIFIED
CONDITION
SUSPECTED TROUBLE AREA
PROCEED
TO
R12-4 (MGND) - Body
ground
Always
Below 1 Ω
Leak detection pump
A
Always
10 kΩ or higher
Wire harness between canister pump
module and body ground
B
B
GO TO STEP 41
16.
CHECK HARNESS AND CONNECTOR (ECM - CANISTER PUMP MODULE)
(a) Turn the ignition switch off.
(b) Disconnect the R12 canister pump module connector.
3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: EVAP System...
(c) Disconnect the A24 ECM connector.
(d) Measure the resistance according to the value(s) in the table below.
Result
TESTER CONNECTION
CONDITION
SPECIFIED
CONDITION
SUSPECTED TROUBLE AREA
PROCEED
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
A
3UR-FBE ENGINE CONTROL SYSTEM: SFI SYSTEM: EVAP System...
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