2GR-FE (ENGINE CONTROL): SFI SYSTEM: EVAP System; 2016 MY Sienna [12/2015

Last Modified: 04-05-2023	6.11:8.1.0	Doc ID: RM100000000VIBL
Model Year Start: 2016	Model: Sienna	Prod Date Range: [12/2015 - 08/2016]
Title: 2GR-FE (ENGINE CONTROL): SFI SYSTEM: EVAP System; 2016 MY Sienna [12/2015 - 08/2016]

EVAP System

RELATED DTCS

DTC No.	Monitoring Item	See page
P043E	Reference orifice clogged (built into canister pump module)
P043F	Reference orifice high-flow (built into canister pump module)
P0441	Purge VSV (Vacuum Switching Valve) stuck closed Purge VSV stuck open Purge flow
P0451	Canister pressure sensor (built into canister pump module) signal noise Canister pressure sensor (built into canister pump module) signal becomes fixed/flat
P0452	Canister pressure sensor (built into canister pump module) voltage low
P0453	Canister pressure sensor (built into canister pump module) voltage high
P0455	EVAP gross leak
P0456	EVAP small leak
P2401	Leak detection pump stuck OFF (built into canister pump module)
P2402	Leak detection pump stuck ON (built into canister pump module)
P2419	Vent valve stuck closed (built into canister pump module)
P2420	Vent valve stuck open (vent) (built into canister pump module)
P2610	Soak timer (built into ECM)

If any EVAP system DTCs are stored, the malfunctioning area can be determined using the table below.

NOTICE:

If the reference pressure difference between the first and second checks is more than the specification, all the DTCs relating to the reference pressure (P043E, P043F, P2401, P2402 and P2419) will all be stored.

DESCRIPTION

Text in Illustration

*1	Purge VSV	*2	EVAP Hose (to Intake Air Surge Tank)
*3	EVAP Hose (from Canister Assembly)	*4	Canister Assembly
*5	Canister Filter	*6	Air Inlet Port (behind Fuel Tank Filler Pipe Cover)
*7	Vent Hose	*8	Fuel Cap
*9	Fuel Tank	*10	Purge Line
*11	Canister Pump Module	-	-
*a	Location of EVAP (Evaporative Emission) System	-	-

HINT:

The canister pressure sensor, the leak detection pump and the vent valve are built into the canister pump module.

Text in Illustration

*1	Canister Pump Module	*2	Intake Air Surge Tank
*3	Purge VSV	*4	Throttle Valve
*5	Canister (Charcoal Filter)	*6	Cut-off Valve
*7	Fuel Tank	*8	Air Cleaner
*9	ECM	*10	Canister Filter
*11	Soak Timer	*12	Roll-Over Valve
*13	Fuel Cap	-	-
*a	EVAP System Circuit	-	-

NOTICE:

In the EVAP system of this vehicle, turning ON the vent valve does not seal off the EVAP system. To check for leaks in the EVAP system, disconnect the air inlet vent hose and apply pressure from atmospheric side of the canister assembly.

While the engine is running, if a predetermined condition (closed-loop, etc.) is met, the purge VSV is opened by the ECM and fuel vapors stored in the canister assembly are purged to the intake air surge tank. The ECM changes the duty cycle ratio of the purge VSV to control purge flow volume.

The purge flow volume is also determined by the intake air surge tank pressure. Atmospheric pressure is allowed into the canister assembly through the vent valve to ensure that the purge flow is maintained when negative pressure (vacuum) is applied to the canister assembly.

The following two monitors run to confirm appropriate EVAP system operation.

1. Key-off monitor

This monitor checks for EVAP (evaporative emission) system leaks and canister pump module malfunctions. The monitor starts 5 hours* after the ignition switch is turned off. At least 5 hours are required for the fuel to cool down to stabilize the EVAP pressure, thus making the EVAP system monitor more accurate.

The leak detection pump creates negative pressure (vacuum) in the EVAP system and the pressure is measured. Finally, the ECM monitors for leaks from the EVAP system, and malfunctions in both the canister pump module and purge VSV based on the EVAP pressure.

HINT:

*: If the engine coolant temperature is not below 35°C (95°F) 5 hours after the ignition switch is turned off, the monitor check starts 2 hours later. If it is still not below 35°C (95°F) 7 hours after the ignition switch is turned off, the monitor check starts 2.5 hours later.

2. Purge flow monitor

The purge flow monitor consists of the 2 monitors. The 1st monitor is conducted every time and the 2nd monitor is activated if necessary.

The 1st monitor
While the engine is running and the purge VSV (Vacuum Switching Valve) is on (open), the ECM monitors the purge flow by measuring the EVAP pressure change. If negative pressure is not created, the ECM begins the 2nd monitor.
The 2nd monitor
The vent valve is turned ON (closed) and the EVAP pressure is then measured. If the variation in the pressure is less than 0.15 kPa(gauge) [1.13 mmHg(gauge)], the ECM interprets this as the purge VSV being stuck closed, and illuminates the MIL and stores DTC P0441 (2 trip detection logic).

Atmospheric pressure check:
- In order to ensure reliable malfunction detection, the variation between the atmospheric pressures, before and after of the purge flow monitor, is measured by the ECM.

Text in Illustration

*1	Canister (Charcoal Filter)	*2	to Intake Air Surge Tank
*3	ECM	*4	Soak Timer
*5	Purge VSV (on)	*6	Fuel Cap
*7	Canister Filter	*8	Fuel Tank
*9	Leak Detection Pump (off)	*10	Canister Pressure Sensor
*11	Reference Orifice (0.02 inch)	*12	Vent Valve (off)
*13	Canister Pump Module	-	-
*a	EVAP Purge Flow	-	-

Component	Operation
Canister assembly	Contains activated charcoal to absorb EVAP (Evaporative Emissions) generated in fuel tank.
Cut-off valve	Located in fuel tank. Valve floats and closes when fuel tank is 100% full.
Purge VSV (Vacuum Switching Valve)	Opens or closes line between canister and intake air surge tank. ECM uses purge VSV to control EVAP purge flow. In order to discharge EVAP absorbed by canister to intake air surge tank, ECM opens purge VSV. EVAP discharge volume to intake air surge tank controlled by purge VSV duty cycle (current-carrying time). (Open: on, Close: off)
Roll-over valve	Located in fuel tank. Valve closes by its own weight when vehicle overturns to prevent fuel from spilling out.
Soak timer	Built into ECM. To ensure accurate EVAP monitor, measures 5 hours (+/-15 min) after ignition switch is turned off. This allows fuel to cool down, stabilizing EVAP pressure. When approximately 5 hours elapsed, ECM activates (refer to fig. 3).
Canister pump module	Consists of (a) to (d) below.
(a) Vent valve	Vents and closes EVAP system. When ECM turns valve on, EVAP system is closed. When ECM turns valve off, EVAP system is vented. Negative pressure (vacuum) is created in EVAP system to check for EVAP leaks by closing purge VSV, turning on vent valve (closing it) and operating leak detection pump (refer to fig. 1).
(b) Canister pressure sensor	Indicates pressure as voltages. ECM supplies regulated 5 V to pressure sensor, and uses feedback from sensor to monitor EVAP system pressure (refer to fig. 2).
(c) Leak detection pump	Creates negative pressure (vacuum) in EVAP system for leak check.
(d) Reference orifice	Has opening with 0.02 inch diameter. Vacuum is produced through orifice by closing purge VSV, turning off vent valve and operating leak detection pump, to monitor reference pressure. Reference pressure indicates a small leak of EVAP.

Text in Illustration

*1	Canister	*2	Reference Orifice (0.02 Inch)
*3	Canister Pressure Sensor	-	-
*a	Canister Pump Module (fig. 1)	*b	Airflow
*c	Condition: Purge Flow	*d	Condition: Leak Check
*e	Vent Valve: off (vent)	*f	to Canister Filter (Atmosphere)
*g	Leak Detection Pump: off	*h	Vent Valve: on (closed)
*i	Leak Detection Pump: on	-	-

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

Inspect the fuses for circuits related to this system before performing the following inspection procedure.
The Techstream is required to conduct the following diagnostic troubleshooting procedure.

HINT:

Using the Techstream enables the EVAP (Evaporative Emission) system monitor results to be confirmed.
Read freeze frame data using the Techstream. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air fuel ratio was lean or rich, and other data from the time the malfunction occurred.

CONFIRMATION DRIVING PATTERN

HINT:

After a repair, check Monitor Status by performing the Key-Off Monitor Confirmation and Purge Flow Monitor Confirmation described below.

1. KEY-OFF MONITOR CONFIRMATION

(a) Preconditions

The monitor will not run unless:

The vehicle has been driven for 10 minutes or more (in a city area or on a freeway).
The fuel tank is less than 90% full.
The altitude is less than 7875 ft. (2400 m).
The engine coolant temperature is between 4.4 and 35°C (40 and 95°F).
The intake air temperature is between 4.4 and 35°C (40 and 95°F).
The vehicle remains stationary (the vehicle speed is 0 km/h [0 mph]).

(b) Monitor Conditions

Allow the engine to idle for at least 5 minutes.
Turn the engine switch off and wait for 6 hours (8 or 10.5 hours).
HINT:

Do not start the engine until checking Monitor Status. If the engine is started, the steps described above must be repeated.

Connect the Techstream to the DLC3.
Turn the ignition switch to ON.
Turn the Techstream on.
Enter the following menus: Powertrain / Engine and ECT / Monitor / Current Monitor.
Check the Monitor Status displayed on the Techstream.
HINT:

If Incomplete is displayed, the monitor did not complete. Make sure that the preconditions have been met, and perform the Monitor Conditions again.

2. PURGE FLOW MONITOR CONFIRMATION (P0441)

HINT:

Perform this monitor confirmation after the Key-Off Monitor Confirmation shows Complete.

(a) Preconditions

The monitor will not run unless:

The vehicle has been driven for 10 minutes or more (in a city area or on a freeway).
The engine coolant temperature is 4.4°C (40°F) or higher.
The intake air temperature is 4.4°C (40°F) or higher.

(b) Monitor Conditions

Release the pressure from the fuel tank by removing and reinstalling the fuel cap.
Warm the engine up until the engine coolant temperature reaches higher than 75°C (167°F).
Increase the engine speed to 3000 rpm once.
Allow the engine to idle and turn the A/C switch on for 1 minute.

Turn the ignition switch off (if ON or if the engine is running).
Connect the Techstream to the DLC3.
Turn the ignition switch to ON.
Turn the Techstream on.
Enter the following menus: Powertrain / Engine and ECT / Monitor / Current Monitor.
Check the Monitor Status displayed on the Techstream.
HINT:

If Incomplete is displayed, the monitor did not complete. Make sure that the preconditions have been met, and perform the Monitor Conditions again.

MONITOR RESULT

Refer to Checking Monitor Status.

Click here

PROCEDURE

1.	CONFIRM DTC

(a) Turn the ignition switch off and wait for 10 seconds.

(b) Turn the ignition switch to ON.

(d) Connect the Techstream to the DLC3.

(e) Turn the ignition switch to ON and turn the Techstream on.

(f) Enter the following menus: Powertrain / Engine / Trouble Codes.

(g) Confirm DTCs and freeze frame data.

If any EVAP system DTCs are stored, the malfunctioning area can be determined using the table below.

NOTICE:

If the reference pressure difference between the first and second checks is greater than the specification, all the DTCs relating to the reference pressure (P043E, P043F, P2401, P2402 and P2419) are stored.

2.	PERFORM EVAP SYSTEM CHECK (AUTOMATIC MODE)

NOTICE:

The Evaporative System Check (Automatic Mode) consists of 6 steps performed automatically by the Techstream. It takes a maximum of approximately 24 minutes.
Do not perform the Evaporative System Check when the fuel tank is more than 90% full because the cut-off valve may be closed, making the fuel tank leak check unavailable.
Do not run the engine during this operation.
When the temperature of the fuel is 35°C (95°F) or more, a large amount of vapor forms and any check results become inaccurate. When performing the Evaporative System Check, keep the temperature below 35°C (95°F).

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(d) Clear the DTCs (See page ).

(e) Enter the following menus: Powertrain / Engine / Utility / Evaporative System Check / Automatic Mode.

(f) After the EVAP SYSTEM CHECK is completed, check for pending DTCs by entering the following menus: Powertrain / Engine / Trouble Codes.

HINT:

If no pending DTCs are displayed, perform the Confirmation Driving Pattern. After this confirmation, check for pending DTCs. If no DTCs are displayed, the EVAP system is normal.

3.	PERFORM EVAP SYSTEM CHECK (MANUAL MODE)

NOTICE:

In the Evaporative System Check (Manual Mode), the series of 6 Evaporative System Check steps are performed manually using the Techstream.
Do not perform the Evaporative System Check when the fuel tank is more than 90% full because the cut-off valve may be closed, making the fuel tank leak check unavailable.
Do not run the engine during this operation.
When the temperature of the fuel is 35°C (95°F) or more, a large amount of vapor forms and any check results become inaccurate. When performing the Evaporative System Check, keep the temperature below 35°C (95°F).

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(d) Clear the DTCs (See page ).

(e) Enter the following menus: Powertrain / Engine / Utility / Evaporative System Check / Manual Mode.

4.	PERFORM EVAP SYSTEM CHECK (STEP 1/6)

(a) Check the EVAP pressure in step 1/6.

Result

DTC*1	Result	Suspected Trouble Area	Proceed to
-	Virtually no variation in EVAP pressure	Not yet determined	A
P0451	EVAP pressure fluctuates by +/-0.3 kPa(gauge) [2.25 mmHg(gauge)] or more	Canister pressure sensor signal noise	B
(P0452 or P0453)*2	EVAP pressure is below 42.11009 kPa(abs) [315.85178 mmHg(abs)] or 123.76147 kPa(abs) [928.28775 mmHg(abs)] or more EVAP pressure deviates +/-10 kPa [+/-75 mmHg] from actual atmosphere pressure*3	Canister pressure sensor or its circuit has malfunction	C

*1: These DTCs are already present in the ECM when the vehicle arrives and are confirmed in the "Confirm DTC" procedure above.
*2: If the canister pressure sensor circuit has an open or short, DTC P0452 or P0453 is stored 0.5 seconds after the ignition switch is turned to ON.

HINT:

*3: Canister pressure sensor standard output range is 70 to 110 kPa(abs) [525 to 825 mmHg(abs)]. This varies by weather.

GO TO STEP 38

GO TO STEP 12

5.	PERFORM EVAP SYSTEM CHECK (STEP 1/6 TO 2/6)

(a) Check the EVAP pressure in steps 1/6 and 2/6.

Result

DTC*	Result	Suspected Trouble Area	Proceed to
-	Virtually no variation in EVAP pressure during step 1/6. Then decreases to reference pressure	Not yet determined	A
P2402	Small difference between EVAP pressures during steps 1/6 and 2/6	Leak detection pump stuck ON	B

*: These DTCs are already present in the ECM when the vehicle arrives and are confirmed in the "Confirm DTC" procedure above.

HINT:

The first reference pressure is the value determined in step 2/6.

GO TO STEP 33

6.	PERFORM EVAP SYSTEM CHECK (STEP 2/6)

HINT:

Make a note of the pressures checked in inspection items (A) and (B) below.

(a) Check the EVAP pressure 4 seconds after the leak detection pump is activated*1 (A).

*1: The leak detection pump begins to operate as step 1/6 finishes and step 2/6 starts.

(b) Check the EVAP pressure again when it has stabilized. This pressure is the reference pressure (B).

Result

DTC*2	Result	Suspected Trouble Area	Proceed to
-	EVAP pressure in inspection item (B) is between -4.85 kPa(gauge) and -1.057 kPa(gauge) [-36.377 mmHg(gauge) and -7.928 mmHg(gauge)]	Not yet determined	A
P043F and P2401	EVAP pressure in inspection item (B) is -1.057 kPa(gauge) [-7.928 mmHg(gauge)] or more	Reference orifice high-flow Leak detection pump stuck OFF	B
P043E	EVAP pressure in inspection item (B) is less than -4.85 kPa(gauge) [-36.377 mmHg(gauge)]	Reference orifice clogged	C
P2419	EVAP pressure in inspection item (A) is more than -0.25 kPa(gauge) [-1.875 mmHg(gauge)]	Vent valve stuck closed Leak detection pump performance deteriorates Leak detection pump circuit malfunctioning (large resistance exists in the circuit)	D

*2: These DTCs are already present in the ECM when the vehicle arrives and are confirmed in the "Confirm DTC" procedure above.

GO TO STEP 11

GO TO STEP 38

GO TO STEP 13

7.	PERFORM EVAP SYSTEM CHECK (STEP 2/6 TO 3/6)

(a) Check the EVAP pressure in step 3/6.

Result

DTC*	Result	Suspected Trouble Area	Proceed to
-	EVAP pressure increases by 0.3 kPa(gauge) [2.25 mmHg(gauge)] or more within 10 seconds of proceeding from step 2/6 to step 3/6	Not yet determined	A
P2420	No variation in EVAP pressure even after proceeding from step 2/6 to step 3/6	Vent valve stuck open (vent) Canister assembly (charcoal filter inside canister) clogged	B
P0451	No variation in EVAP pressure during steps 1/6 through 3/6	Canister pressure sensor output value stuck Vent valve broken (valve split in two) Leak detection pump performance deteriorates Leak detection pump circuit malfunctioning (large resistance exists in the circuit)	C

*: These DTCs are already present in the ECM when the vehicle arrives and are confirmed in the "Confirm DTC" procedure above.

GO TO STEP 27

GO TO STEP 15

8.	PERFORM EVAP SYSTEM CHECK (STEP 3/6)

(a) Wait until the EVAP pressure change is less than 0.1 kPa(gauge) [0.75 mmHg(gauge)] for 50 seconds.

(b) Measure the EVAP pressure and record it.

HINT:

A few minutes are required for the EVAP pressure to become saturated. When there is little fuel in the fuel tank, it takes up to 15 minutes.

9.	PERFORM EVAP SYSTEM CHECK (STEP 4/6)

(a) Check the EVAP pressure in step 4/6.

Result

DTC*1

Result

Suspected Trouble Area

Proceed to

EVAP pressure increases by 0.3 kPa(gauge) [2.25 mmHg(gauge)] or more within 10 seconds of proceeding from step 3/6 to step 4/6

Not yet determined

P0441

EVAP pressure increases by 0.3 kPa(gauge) [2.25 mmHg(gauge)] or more within 10 seconds of proceeding from step 3/6 to step 4/6

Purge VSV
Purge VSV circuit
Problems in EVAP hose between purge VSV and intake air surge tank
Problems in EVAP hose between canister assembly and purge VSV
ECM

P0441

Variation in EVAP pressure is less than 0.3 kPa(gauge) [2.25 mmHg(gauge)] for 10 seconds, after proceeding from step 3/6 to step 4/6

Purge VSV stuck closed
Purge VSV circuit
Canister assembly (charcoal filter inside canister) clogged
Problems in EVAP hose between purge VSV and intake air surge tank
Problems in EVAP hose between canister assembly and purge VSV
ECM

*1: These DTCs are already present in the ECM when the vehicle arrives and are confirmed in the "Confirm DTC" procedure 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.

GO TO STEP 22

GO TO STEP 17

10.	PERFORM EVAP SYSTEM CHECK (STEP 5/6)

(a) Check the EVAP pressure in step 5/6.

(b) Compare the EVAP pressure in step 3/6 and the second reference pressure (step 5/6).

Result

DTC*	Result	Suspected Trouble Area	Proceed to
-	EVAP pressure from 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 from 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 from step 3/6 higher than second reference pressure (step 5/6)	EVAP small leak	B

*: These DTCs are already present in the ECM when the vehicle arrives and are confirmed in the "Confirm DTC" procedure above.

GO TO STEP 43

GO TO STEP 17

11.	PERFORM EVAP SYSTEM CHECK (STEP 3/6)

(a) Check the EVAP pressure in step 3/6.

Result

DTC*	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 present in the ECM when the vehicle arrives and are confirmed in the "Confirm DTC" procedure above.

HINT:

The first reference pressure is the value determined in step 2/6.

GO TO STEP 38

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 (See page ).

GO TO STEP 49

13.	INSPECT CANISTER PUMP MODULE (VENT VALVE OPERATION)

(a) Turn the ignition switch off.

(b) Disconnect the g1 canister pump module connector.

Text in Illustration

*a	Component without harness connected (Canister Pump Module)

(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 performance deteriorates Leak detection pump circuit malfunctioning (large resistance exists in the circuit) ECM	A
Apply battery voltage to terminals VLVB and VGND	Not operating	Vent valve	B

GO TO STEP 38

14.	CHECK HARNESS AND CONNECTOR (CANISTER PUMP MODULE - ECM)

(a) Turn the ignition switch off.

(b) Disconnect the A39 ECM connector.

(d) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
A39-30 (VPMP) - g1-1 (VGND)	Always	Below 1 Ω
A39-30 (VPMP) or g1-1 (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

GO TO STEP 40

15.	CHECK HARNESS AND CONNECTOR (CANISTER PUMP MODULE - BODY GROUND)

(a) Disconnect the g1 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
g1-4 (MGND) - Body ground	Always	Below 1 Ω	Canister pump module Wire harness or connector between canister pump module and ECM ECM	A
g1-4 (MGND) - Body ground	Always	10 kΩ or higher	Wire harness or connector between canister pump module and body ground	B

GO TO STEP 40

16.	CHECK HARNESS AND CONNECTOR (ECM - CANISTER PUMP MODULE)

(a) Disconnect the g1 canister pump module connector.

(b) Disconnect the A39 ECM connector.

Result

Tester Connection	Condition	Specified Condition	Suspected Trouble Area	Proceed to
A39-49 (MPMP) - g1-3 (MTRB)	Always	Below 1 Ω	Canister pump module ECM	A
A39-49 (MPMP) - g1-3 (MTRB)	Always	10 kΩ or higher	Wire harness or connector between ECM and canister pump module	B

GO TO STEP 45

GO TO STEP 40

17.	PERFORM ACTIVE TEST USING TECHSTREAM (PURGE VSV)

(a) Enter the following menus: Powertrain / Engine / Active Test / Activate the VSV for EVAP Control.

(b) Disconnect the hose (connected to the canister assembly) from the purge VSV.

Text in Illustration

*1	Purge VSV
*2	Hose (to Canister Assembly)

(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 assembly and purge VSV Canister assembly (charcoal filter inside canister) clogged ECM	A
	Leakage is considered (based on result of step 10): Fuel cap 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 air surge tank	D

GO TO STEP 20

GO TO STEP 21

GO TO STEP 23

18.	INSPECT EVAP HOSE (PURGE VSV - CANISTER ASSEMBLY)

(a) Check for blockages in the EVAP purge line between the purge VSV and canister assembly.

OK:

No blockages in the EVAP purge line between the purge VSV and canister assembly.

GO TO STEP 44

19.	INSPECT CANISTER ASSEMBLY (CHARCOAL FILTER INSIDE CANISTER)

(a) Check for filter blockage in the canister assembly (See page ).

OK:

No blockages in the canister assembly.

GO TO STEP 47

GO TO STEP 48

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 tester.

(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

GO TO STEP 37

GO TO STEP 35

GO TO STEP 36

21.	INSPECT PURGE VSV

(a) Turn the ignition switch off.

(b) Disconnect the B22 purge VSV connector.

Text in Illustration

*1	Hose (to Canister Assembly)
*2	Connector
*3	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

GO TO STEP 26

GO TO STEP 39

22.	INSPECT EVAP HOSE (PURGE VSV - CANISTER ASSEMBLY)

(a) Check for blockages in the EVAP purge line between the purge VSV and canister assembly.

OK:

No blockages in the EVAP purge line between the purge VSV and canister assembly.

GO TO STEP 44

23.	CHECK EVAP HOSE (PURGE VSV - INTAKE AIR SURGE TANK)

(a) Disconnect the hose (connected to the intake air surge tank) from the purge VSV.

Text in Illustration

*1	Purge VSV
*2	Hose (to intake air surge tank)

(b) Start the engine.

Result

Test Result	Suspected Trouble Area	Proceed to
Suction applied	EVAP hose between purge VSV and intake air surge tank normal Purge VSV Purge VSV power source Wire harness or connector between purge VSV and ECM	A
No suction	Intake air surge tank port EVAP hose between purge VSV and intake air surge tank	B

GO TO STEP 34

24.	INSPECT PURGE VSV

(a) Remove the purge VSV.

(b) Apply battery voltage to the terminals of the purge VSV.

Text in Illustration

Purge VSV

Result

Test Result	Condition	Suspected Trouble Area	Proceed to
Air flows	Battery voltage is applied to purge VSV terminals	Purge VSV normal Purge VSV power source Wire harness or connector between purge VSV and ECM	A
No air flow	Battery voltage is applied to purge VSV terminals	Purge VSV	B

GO TO STEP 39

25.	CHECK TERMINAL VOLTAGE (POWER SOURCE OF PURGE VSV)

(a) Disconnect the purge VSV connector.

(b) Turn the ignition switch to ON.

Text in Illustration

*a	Front view of wire harness connector (to Purge VSV)

Result

Tester Connection	Switch Condition	Specified Condition	Suspected Trouble Area	Proceed to
B22-1 - Body ground	Ignition switch ON	11 to 14 V	Purge VSV power source normal Wire harness or connector between purge VSV and ECM	A
B22-1 - Body ground	Ignition switch ON	Other than result above	Wire harness or connectors between purge VSV and battery	B

GO TO STEP 40

26.	CHECK HARNESS AND CONNECTOR (PURGE VSV - ECM)

(a) Disconnect the B1 ECM connector.

(b) Disconnect the B22 purge VSV connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
B22-2 - B1-63 (PRG)	Always	Below 1 Ω
B22-2 or B1-63 (PRG) - Body ground	Always	10 kΩ or higher

GO TO STEP 47

GO TO STEP 40

27.	INSPECT CANISTER PUMP MODULE (POWER SOURCE FOR VENT VALVE)

(a) Turn the ignition switch off.

Text in Illustration

Front view of wire harness connector

(to Canister Pump Module)

(b) Disconnect the canister pump module connector.

(d) Measure the voltage according to the value(s) in the table below.

Result

Tester Connection	Switch Condition	Specified Condition	Suspected Trouble Area	Proceed to
g1-5 (VLVB) - Body ground	Ignition switch ON	11 to 14 V	Wire harness or connector between vent valve and ECM Canister pump module (vent valve) Canister assembly (charcoal filter inside canister) clogged ECM	A
g1-5 (VLVB) - Body ground	Ignition switch ON	Below 3 V	Power source wire harness of vent valve	B

GO TO STEP 40

28.	INSPECT CANISTER PUMP MODULE (VENT VALVE OPERATION)

(a) Turn the ignition switch off.

(b) Disconnect the g1 canister pump module connector.

Text in Illustration

*a	Component without harness connected (Canister Pump Module)

(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 canister pump module and ECM Canister (charcoal filter inside canister) clogged ECM	A
Apply battery voltage to terminals VLVB and VGND	Not operating	Vent valve	B

GO TO STEP 38

29.	CHECK HARNESS AND CONNECTOR (CANISTER PUMP MODULE - ECM)

(a) Turn the ignition switch off.

(b) Disconnect the A39 ECM connector.

(d) Measure the resistance according to the value(s) in the table below.

Result

Tester Connection	Condition	Test Result	Suspected Trouble Area	Proceed to
A39-30 (VPMP) - g1-1 (VGND)	Always	Below 1 Ω	Canister assembly (charcoal filter inside canister) clogged ECM	A
A39-30 (VPMP) - g1-1 (VGND)	Always	10 kΩ or higher	Wire harness or connector between ECM and canister pump module	B

GO TO STEP 40

30.	INSPECT CANISTER ASSEMBLY (CHARCOAL FILTER INSIDE CANISTER)

(a) Check for filter blockage in the canister assembly (See page ).

OK:

No blockages in the canister assembly.

GO TO STEP 47

GO TO STEP 48

31.	CHECK TERMINAL VOLTAGE (CANISTER PUMP MODULE)

(a) Turn the ignition switch off.

(b) Disconnect the canister pump module connector.

Text in Illustration

Front view of wire harness connector

(to Canister Pump Module)

(d) Measure the voltage according to the value(s) in the table below.

Result

Tester Connection	Condition	Test Result	Suspected Trouble Area	Proceed to
g1-3 (MTRB) - Body ground	Ignition switch ON	9 to 14 V	Wire harness or connector between canister pump module and body ground Canister pump module (leak detection pump)	A
g1-3 (MTRB) - Body ground	Ignition switch ON	Below 3 V	Wire harness or connector between canister pump module and ECM ECM	B

GO TO STEP 33

32.	CHECK HARNESS AND CONNECTOR (CANISTER PUMP MODULE - BODY GROUND)

(a) Turn the ignition switch off.

(b) Disconnect the g1 canister pump module connector.

Result

Tester Connection	Condition	Specified Condition	Suspected Trouble Area	Proceed to
g1-4 (MGND) - Body ground	Always	Below 1 Ω	Canister pump module (leak detection pump)	A
g1-4 (MGND) - Body ground	Always	10 kΩ or higher	Wire harness or connector between canister pump module and body ground	B

GO TO STEP 38

GO TO STEP 40

33.	CHECK HARNESS AND CONNECTOR (ECM - CANISTER PUMP MODULE)

(a) Turn the ignition switch off.

(b) Disconnect the g1 canister pump module connector.

(d) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection	Condition	Specified Condition
A39-49 (MPMP) - g1-3 (MTRB)	Always	Below 1 Ω
A39-49 (MPMP) or g1-3 (MTRB) - Body ground	Always	10 kΩ or higher

Result

Result	Suspected Trouble Area	Proceed to
OK	ECM	A
NG	Wire harness or connector between ECM and canister pump module	B

GO TO STEP 47

GO TO STEP 40

34.	INSPECT INTAKE AIR SURGE TANK (EVAP PURGE PORT)

(a) Stop the engine.

(b) Disconnect the EVAP hose from the intake air surge tank.

(d) Use your finger to confirm that the port of the intake air surge tank has suction.

Result

Tester Connection	Suspected Trouble Area	Proceed to
Suction applied	EVAP hose between intake air surge tank and purge VSV	A
No suction	Intake air surge tank	B

GO TO STEP 41

GO TO STEP 42

35.	CORRECTLY REINSTALL OR REPLACE FUEL TANK CAP ASSEMBLY

HINT:

When reinstalling the fuel cap, tighten it firmly (only one click sound could be heard).
When replacing the fuel cap, use a fuel cap that meets OEM specifications, and install it firmly.

GO TO STEP 49

36.	REPLACE FUEL TANK CAP ASSEMBLY

HINT:

When installing the fuel cap, tighten it firmly (only one click sound could be heard).

GO TO STEP 49

37.	LOCATE EVAP LEAK PART

(a) Disconnect the vent hose.

Text in Illustration

*1	Fuel Tank	*2	Canister Assembly
*3	Canister Filter	*4	Fuel Cap
*5	Canister Pump Module	-	-
*a	Disconnect the vent here	-	-

(b) Connect the EVAP pressure tester tool to the canister pump module with the adapter.

Text in Illustration

*1	Canister Pump Module	*2	Adapter
*3	EVAP Pressure Tester Tool	-	-

(d) Apply soapy water to the piping and connecting parts of the EVAP system.

(e) Look for areas where bubbles appear. This indicates the leak point.

(f) Repair or replace the leak point.

HINT:

Disconnect the hose between the canister assembly and fuel tank from the canister assembly. Block the canister side and conduct an inspection. In this way, the fuel tank can be excluded as an area suspected of causing fuel leaks.

GO TO STEP 49

38.	REPLACE CANISTER PUMP MODULE

(a) Replace the canister pump module (See page ).

NOTICE:

When replacing canister pump module, check the canister pump module interior, canister interior and related pipes for water, fuel and other liquids. If liquids are present, check for disconnections and/or cracks in the following: 1) the pipe from the air inlet port to the canister pump module; 2) the canister filter; and 3) the fuel tank vent hose. If liquids are present in canister interior, replace canister and canister pump module together (replace canister assembly).
Check for filter blockage in the canister assembly. If the charcoal filter inside the canister assembly is clogged, replace canister and canister pump module together (replace canister assembly).
Check for filter blockage in the canister filter. If the canister filter has blockages, replace the canister filter.

Text in Illustration

*1	Fuel Tank Vent Hose	*2	Vent Hose
*3	Air Inlet Port (behind Fuel Tank Filler Pipe Cover)	*4	Canister Filter
*5	Fuel Tank	*6	Canister Assembly
*7	Canister Pump Module	-	-
*a	Inspection Area (Check for disconnection and/or cracks)	-	-

GO TO STEP 49

39.	REPLACE PURGE VSV

(a) Replace the purge VSV (See page ).

GO TO STEP 49

40.	REPAIR OR REPLACE HARNESS OR CONNECTOR

GO TO STEP 49

41.	REPAIR OR REPLACE EVAP PURGE LINE (INTAKE AIR SURGE TANK - PURGE VSV)

GO TO STEP 49

42.	INSPECT INTAKE AIR SURGE TANK (EVAP PURGE PORT)

(a) Check that the EVAP purge port of the intake air surge tank is not clogged. If necessary, replace the intake air surge tank (See page ).

GO TO STEP 49

43.	REPAIR OR REPLACE PARTS AND COMPONENTS INDICATED BY OUTPUT DTCS

(a) Repair the malfunctioning areas indicated by the DTCs that had been confirmed when the vehicle was brought in.

GO TO STEP 49

44.	REPAIR OR REPLACE EVAP PURGE LINE (PURGE VSV - CANISTER ASSEMBLY)

GO TO STEP 49

45.	REPLACE CANISTER PUMP MODULE

(a) Replace the canister pump module (See page ).

NOTICE:

When replacing canister pump module, check the canister pump module interior, canister interior and related pipes for water, fuel and other liquids. If liquids are present, check for disconnections and/or cracks in the following: 1) the pipe from the air inlet port to the canister pump module; 2) the canister filter; and 3) the fuel tank vent hose. If liquids are present in canister interior, replace canister and canister pump module together (replace canister assembly).
Check for filter blockage in the canister assembly. If the charcoal filter inside the canister assembly is clogged, replace canister and canister pump module together (replace canister assembly).
Check for filter blockage in the canister filter. If the canister filter has blockages, replace the canister filter.

Text in Illustration

*1	Fuel Tank Vent Hose	*2	Vent Hose
*3	Air Inlet Port (behind Fuel Tank Filler Pipe Cover)	*4	Canister Filter
*5	Fuel Tank	*6	Canister Assembly
*7	Canister Pump Module	-	-
*a	Inspection Area (Check for disconnection and/or cracks)	-	-

46.	PERFORM EVAP SYSTEM CHECK (AUTOMATIC MODE)

NOTICE:

The Evaporative System Check (Automatic Mode) consists of 6 steps performed automatically by the Techstream. It takes a maximum of approximately 24 minutes.
Do not perform the Evaporative System Check when the fuel tank is more than 90% full because the cut-off valve may be closed, making the fuel tank leak check unavailable.
Do not run the engine in this step.
When the temperature of the fuel is 35°C (95°F) or more, a large amount of vapor forms and any check results become inaccurate. When performing an Evaporative System Check, keep the fuel temperature below 35°C (95°F).

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(d) Clear the DTCs (See page ).

(e) Enter the following menus: Powertrain / Engine / Utility / Evaporative System Check / Automatic Mode.

(f) After the Evaporative System Check is completed, check for pending DTCs by entering the following menus: Powertrain / Engine / Trouble Codes.

Result

Proceed to

EVAP system DTCs are output

No DTCs output

(No pending DTCs output)

END

47.	REPLACE ECM

(a) Replace the ECM (See page ).

GO TO STEP 49

48.	REPLACE CANISTER ASSEMBLY

(a) Replace the canister assembly (See page ).

NOTICE:

When replacing the canister assembly, check the canister pump module interior and related pipes for water, fuel and other liquids. If liquids are present, check for disconnections and/or cracks in the following: 1) the pipe from the air inlet port to the canister pump module; 2) the canister filter; and 3) the fuel tank vent hose.
Check for filter blockage in the canister filter. if the canister filter has blockages, replace the canister filter.

Text in Illustration

*1	Fuel Tank Vent Hose	*2	Vent Hose
*3	Air Inlet Port (behind Fuel Tank Filler Pipe Cover)	*4	Canister Filter
*5	Fuel Tank	*6	Canister Assembly
*7	Canister Pump Module	-	-
*a	Inspection Area (Check for disconnection and/or cracks)	-	-

49.	PERFORM EVAP SYSTEM CHECK (AUTOMATIC MODE)

NOTICE:

The Evaporative System Check (Automatic Mode) consists of 6 steps performed automatically by the Techstream. It takes a maximum of approximately 24 minutes.
Do not perform the Evaporative System Check when the fuel tank is more than 90% full because the cut-off valve may be closed, making the fuel tank leak check unavailable.
Do not run the engine in this step.
When the temperature of the fuel is 35°C (95°F) or more, a large amount of vapor forms and any check results become inaccurate. When performing an Evaporative System Check, keep the fuel temperature below 35°C (95°F).

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(d) Clear the DTCs (See page ).

(e) Enter the following menus: Powertrain / Engine / Utility / Evaporative System Check / Automatic Mode.

(f) After the Evaporative System Check is completed, check for pending DTCs by entering the following menus: Powertrain / Engine / Trouble Codes.

HINT:

If no pending DTCs are found, the repair has been successfully completed.

END