Toyota Tundra (2015 year). Manual — part 1299
A
CONDITION
TESTER
RESULT
SUSPECTED TROUBLE AREA
PROCEED
TO
performance
deteriorates
Leak detection pump
circuit malfunctioning
(large resistance
exists in the circuit)
ECM
Not
operating
Vent valve
B
Text in Illustration
*a
Component without harness connected
(Canister Pump Module)
B
GO TO STEP 38
14.
CHECK HARNESS AND CONNECTOR (ECM - CANISTER PUMP MODULE)
(a) Disconnect the ECM connector.
(b) Disconnect the canister pump module connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
TESTER CONNECTION
CONDITION
SPECIFIED CONDITION
A24-30 (VPMP) - R12-1 (VGND)
Always
Below 1 Ω
A24-30 (VPMP) or R12-1 (VGND) - Body ground
Always
10 kΩ or higher
Result
RESULT
SUSPECTED TROUBLE AREA
PROCEED TO
OK
Leak detection pump performance deteriorates
Leak detection pump circuit malfunctioning (large resistance exists in the circuit)
ECM
A
NG
Wire harness or connector between ECM and canister pump module
B
1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: EVAP System;...
A
A
B
GO TO STEP 40
15.
CHECK HARNESS AND CONNECTOR (CANISTER PUMP MODULE - BODY GROUND)
(a) Disconnect the canister pump module connector.
(b) 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
Canister pump module
Wire harness or connector between
canister pump module and ECM
ECM
A
10 kΩ or higher
Wire harness or connector between canister
pump module and body ground
B
B
GO TO STEP 40
16.
CHECK HARNESS AND CONNECTOR (ECM - CANISTER PUMP MODULE)
(a) Disconnect the canister pump module connector.
(b) Disconnect the ECM connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
TESTER CONNECTION
CONDITION
SPECIFIED CONDITION
A24-49 (MPMP) - R12-3 (MTRB)
Always
Below 1 Ω
A24-49 (MPMP) or R12-3 (MTRB) - Body ground
Always
10 kΩ or higher
Result
1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: EVAP System;...
RESULT
SUSPECTED TROUBLE AREA
PROCEED TO
OK
Canister pump module
ECM
A
NG
Wire harness or connector between ECM and canister pump module
B
A
GO TO STEP 45
B
GO TO STEP 40
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
canister and purge VSV
Canister (charcoal filter inside canister)
A
1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: EVAP System;...
A
OK
TEST RESULT
SUSPECTED TROUBLE AREA
PROCEED
TO
clogged
ECM
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 EVAP hose between purge
VSV and intake manifold
D
Text in Illustration
*1
Purge VSV
*2
Hose (to Canister)
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 44
1UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: EVAP System;...
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