2ZR-FAE (ENGINE CONTROL): SFI SYSTEM: EVAP System; 2020 - 2023 MY Corolla [01/2019

Last Modified: 07-31-2024	6.11:8.1.0	Doc ID: RM100000001GHB6
Model Year Start: 2020	Model: Corolla	Prod Date Range: [01/2019 - 11/2022]
Title: 2ZR-FAE (ENGINE CONTROL): SFI SYSTEM: EVAP System; 2020 - 2023 MY Corolla [01/2019 - 11/2022]

EVAP System

RELATED DTCS

DTC No.	Monitoring Item	Link
P00FE	EVAP vent line blocked
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
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 output, 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 DTCs relating to the reference pressure (P043E, P043F, P2401, P2402 and P2419) will be stored.

DESCRIPTION

*1	Purge VSV	*2	Fuel Vapor Feed Hose (EVAP Hose) (to Intake Manifold)
*3	Fuel Vapor Feed Hose (EVAP Hose) (from Canister)	*4	Canister Pump Module Canister Pressure Sensor Leak Detection Pump Vent Valve
*5	Canister	*6	No. 2 Charcoal Canister Filter
*7	Canister Filter	*8	Air Inlet Port
*9	Fuel Tank Cap	*10	Fuel Tank
*11	Fuel Tank Vent Hose	*12	Fuel Suction Tube with Pump and Gauge Assembly Fuel Tank Over Fill Check Valve Fuel Sender Gauge Assembly
*a	Location of EVAP (Evaporative Emission) System	*b	Purge Line

HINT:

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

*1	Canister Pump Module	*2	Intake Manifold
*3	Purge VSV	*4	Throttle Valve
*5	Canister	*6	No. 2 Charcoal Canister Filter
*7	Fuel Tank	*8	Air Cleaner
*9	ECM	*10	Canister Filter
*11	Soak Timer	*12	Fuel Tank Over Fill Check Valve
*13	Fuel Tank Cap	*14	Fuel Suction Tube with Pump and Gauge Assembly
*15	Fuel Tank Vent Hose	-	-
*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 the atmospheric side of the canister.

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 are purged to the intake manifold. 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 pressure. Atmospheric pressure is allowed into the canister through the vent valve to ensure that the purge flow is maintained when negative pressure (vacuum) is applied to the canister.

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

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 less than 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 less than 35°C (95°F) 7 hours after the ignition switch is turned off, the monitor check starts 2.5 hours later.

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) [0.02 psi(gauge)], the ECM interprets this as the purge VSV being stuck closed, illuminates the MIL and stores DTC P0441 (2 trip detection logic).

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

*1	Canister	*2	to Intake Manifold
*3	ECM	*4	Soak Timer
*5	Purge VSV (On)	*6	Fuel Tank Cap
*7	Canister Filter	*8	Fuel Tank
*9	Leak Detection Pump (Off)	*10	Canister Pressure Sensor
*11	Reference Orifice (0.02 inches)	*12	Vent Valve (Off)
*13	Canister Pump Module	*14	No. 2 Charcoal Canister Filter
*a	EVAP Purge Flow	-	-

Component	Operation
Canister	Contains activated charcoal to absorb EVAP (Evaporative Emissions) generated in fuel tank.
Fuel Tank Over Fill Check Valve	Located in fuel suction tube with pump and gauge assembly. Cut-off function: Valve floats and closes when fuel tank is 100% full. Roll-over function: Valve closes by its own weight when vehicle overturns to prevent fuel from spilling out.
Purge VSV (Vacuum Switching Valve)	Opens or closes line between canister and intake manifold. ECM uses purge VSV to control EVAP purge flow. In order to discharge EVAP absorbed by canister to intake manifold, ECM opens purge VSV. EVAP discharge volume to intake manifold controlled by purge VSV duty cycle (current-carrying time). (Open: on, Close: off)
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. Canister pump module cannot be disassembled.
(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 is used when checking for small EVAP leaks.

*: Vent Valve Operation

Vent Valve		EVAP System
Off	Close	Vent
On	Open	Close

*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

Refer to DTC P0451.

Click here

CAUTION / NOTICE / HINT

NOTICE:

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

HINT:

Using the Techstream monitor results enables the EVAP (Evaporative Emission) system 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.

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 85% full.
The altitude is less than 2400 m (7875 ft).
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 ignition 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.

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 detailed information in Checking Monitor Status.

Click here

P00FE: Evaporative System / TANK VAPOR LINE

Monitor ID	Test ID	Scaling	Unit	Description
$3D	$E1	Multiply by 0.001	kPa	Test value for tank vapor line restricted / blocked

P0456: Evaporative System / SMALL LEAK

Monitor ID	Test ID	Scaling	Unit	Description
$3D	$C9	Multiply by 0.001	kPa	Test value for small leak

P0455: Evaporative System / GROSS LEAK

Monitor ID	Test ID	Scaling	Unit	Description
$3D	$CA	Multiply by 0.001	kPa	Test value for gross leak

P2401: Evaporative System / VACUUM PMP OFF

Monitor ID	Test ID	Scaling	Unit	Description
$3D	$CB	Multiply by 0.001	kPa	Test value for leak detection pump stuck off

P2402: Evaporative System / VACUUM PMP ON

Monitor ID	Test ID	Scaling	Unit	Description
$3D	$CD	Multiply by 0.001	kPa	Test value for leak detection pump stuck on

P2420: Evaporative System / VENT VALVE OFF

Monitor ID	Test ID	Scaling	Unit	Description
$3D	$CE	Multiply by 0.001	kPa	Test value for vent valve stuck off

P2419: Evaporative System / VENT VALVE ON

Monitor ID	Test ID	Scaling	Unit	Description
$3D	$CF	Multiply by 0.001	kPa	Test value for vent valve stuck on

P043E: Evaporative System / ORIFICE CLOGGED

Monitor ID	Test ID	Scaling	Unit	Description
$3D	$D0	Multiply by 0.001	kPa	Test value for reference orifice low flow

P043F: Evaporative System / ORIFICE HI-FLW

Monitor ID	Test ID	Scaling	Unit	Description
$3D	$D1	Multiply by 0.001	kPa	Test value for reference orifice high flow

P0441: Evaporative System / PURGE VSV CLOSED

Monitor ID	Test ID	Scaling	Unit	Description
$3D	$D4	Multiply by 0.001	kPa	Test value for purge VSV stuck closed

P0441: Evaporative System / PURGE VSV OPENED

Monitor ID	Test ID	Scaling	Unit	Description
$3D	$D5	Multiply by 0.001	kPa	Test value for purge VSV stuck open

P0441: Evaporative System / PURGE FLOW

Monitor ID	Test ID	Scaling	Unit	Description
$3D	$D7	Multiply by 0.001	kPa	Test value for purge flow insufficient

P00FE: Evaporative System / TANK VAPOR LINE

Monitor ID	Test ID	Scaling	Unit	Description
$3D	$E1	Multiply by 0.001	kPa	Test value for tank vapor line restricted / blocked

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.

(f) Turn the Techstream on.

(g) Enter the following menus: Powertrain / Engine and ECT / Trouble Codes.

Powertrain > Engine and ECT > Trouble Codes

(h) Confirm the 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.

CLEAR DTC

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(d) Clear the DTC.

Powertrain > Engine and ECT > Clear DTCs

(e) Turn the ignition switch off and wait for at least 30 seconds.

3.	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 85% 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 higher, a large amount of vapor forms and any check results become inaccurate. When performing the Evaporative System Check, keep the temperature less than 35°C (95°F).
The Evaporative System Check can be performed only once in one trip.
If an Evaporative System Check needs to be performed again, turn the ignition switch off and wait for 5 minutes or more before performing another check.

(a) Turn the ignition switch to ON.

(b) Turn the Techstream on.

Powertrain > Engine and ECT > Utility

Tester Display
Evaporative System Check

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

Powertrain > Engine and ECT > 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.

CLEAR DTC

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(d) Clear the DTC.

Powertrain > Engine and ECT > Clear DTCs

(e) Turn the ignition switch off and wait for at least 30 seconds.

5.	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 85% 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 higher, a large amount of vapor forms and any check results become inaccurate. When performing the Evaporative System Check, keep the temperature less than 35°C (95°F).
The Evaporative System Check can be performed only once in one trip.
If an Evaporative System Check needs to be performed again, turn the ignition switch off and wait for 5 minutes or more before performing another check.

(a) Turn the ignition switch to ON.

(b) Turn the Techstream on.

Powertrain > Engine and ECT > Utility

Tester Display
Evaporative System Check

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

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

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) [0.044 psi(gauge)] or higher	Canister pressure sensor signal noise	B
(P0452 or P0453)*2	EVAP pressure is below 42.11 kPa(abs) [6.11 psi(abs)] or higher than 123.761 kPa(abs) [17.95 psi(abs)] EVAP pressure deviates +/-10 kPa(gauge) [1.45 psi(gauge)] 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) [10.15 to 15.95 psi(abs)]. This varies by weather.

GO TO STEP 56

GO TO STEP 58

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

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

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 52

8.	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).

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) [-0.703 psi(gauge) and -0.153 psi(gauge)]	Not yet determined	A
P043F and P2401	EVAP pressure in inspection item (B) is -1.068 kPa(gauge) [-0.153 psi(gauge)] or higher	Reference orifice high-flow Leak detection pump stuck off	B
P043E	EVAP pressure in inspection item (B) is less than -4.85 kPa(gauge) [-0.703 psi(gauge)]	Reference orifice clogged	C
P2419	EVAP pressure in inspection item (A) is higher than -0.25 kPa(gauge) [-0.04 psi(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 44

GO TO STEP 56

GO TO STEP 45

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

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

DTC*	Result	Suspected Trouble Area	Proceed to
-	EVAP pressure increases by 0.3 kPa(gauge) [0.044 psi(gauge)] or higher 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 (charcoal filter inside canister) clogged	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 37

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

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

DTC*

Result

Suspected Trouble Area

Proceed to

Other than below

Not yet determined

P00FE

Within 21 seconds after step 3/6 begins, the EVAP pressure becomes less than -3.278 kPa(gauge) (-0.475 psi(gauge))

HINT:

Vary with first reference pressure.

Fuel tank vent hose clogged
Fuel suction tube with pump and gauge assembly (fuel tank over fill check valve) clogged
Canister (charcoal filter inside canister) clogged

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

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.

GO TO STEP 34

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

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

DTC*1	Result	Suspected Trouble Area	Proceed to
-	EVAP pressure increases by 0.3 kPa(gauge) [0.044 psi(gauge)] or higher within 10 seconds of proceeding from step 3/6 to step 4/6	Not yet determined	A
P0441*2	EVAP pressure increases by 0.3 kPa(gauge) [0.044 psi(gauge)] or higher 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 manifold Problems in EVAP hose between canister and purge VSV ECM	B
P0441	Variation in EVAP pressure is less than 0.3 kPa(gauge) [0.044 psi(gauge)] 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 between canister and purge VSV ECM	C

*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 14

GO TO STEP 15

12.	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).

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 15

13.	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 59

14.	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.

GO TO STEP 25

GO TO STEP 19

15.	PERFORM ACTIVE TEST USING TECHSTREAM (PURGE VSV)

*1	Purge VSV
*2	Fuel Vapor Feed Hose Assembly (to Canister)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

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

Powertrain > Engine and ECT > Active Test

Tester Display
Activate the VSV for Evap Control

(e) Disconnect the fuel vapor feed hose assembly (connected to the canister) from the purge VSV.

(f) Start the engine.

(g) Using the Techstream, turn off the purge VSV (Activate the VSV for Evap Control: OFF).

(h) Use your finger to confirm that the purge VSV has no suction.

(i) Using the Techstream, turn on the purge VSV (Activate the VSV for Evap Control: ON).

(j) Use your finger to confirm that the purge VSV has suction.

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 11): Problems with EVAP hose between canister and purge VSV Canister (charcoal filter inside canister) clogged ECM	A
	Leakage is considered (based on result of step 12): Fuel cap Leakage from EVAP line, fuel tank, or canister	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

GO TO STEP 20

GO TO STEP 24

GO TO STEP 25

16.	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.

GO TO STEP 19

17.	INSPECT CANISTER (CHARCOAL FILTER INSIDE CANISTER)

(a) Check for filter blockage in the canister.

Click here

OK:

No blockages in the canister.

GO TO STEP 43

18.	INSPECT NO. 2 CHARCOAL CANISTER FILTER (CHARCOAL FILTER INSIDE CANISTER)

(a) Check for filter blockage in the No. 2 charcoal canister filter.

Click here

OK:

No blockages in the No. 2 charcoal canister filter.

GO TO STEP 55

GO TO STEP 42

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

GO TO STEP 59

20.	CHECK FUEL CAP

(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) [0.464 to 0.537 psi(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) [0.29 psi(gauge)] or higher, the fuel cap is normal.

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 22

GO TO STEP 23

21.	LOCATE EVAP LEAK PART

(a) Disconnect the vent hose.

*1	Fuel Tank	*2	Canister
*3	Canister Filter	*4	Fuel Tank Cap
*5	Canister Pump Module	*6	No. 2 Charcoal Canister Filter
*a	Disconnect the vent hose	-	-

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

*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 and fuel tank from the canister. 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 59

22.	CORRECTLY REINSTALL OR REPLACE FUEL CAP

HINT:

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

GO TO STEP 59

23.	REPLACE FUEL CAP

HINT:

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

GO TO STEP 59

24.	INSPECT PURGE VSV

(a) Turn the ignition switch off.

(b) Disconnect the purge VSV connector.

*1	Purge VSV
*2	Fuel Vapor Feed Hose Assembly (to Canister)

(d) Start the engine.

(e) Use your finger to confirm that the purge VSV has no suction.

Test Result	Suspected Trouble Area	Proceed to
No suction	Wire harness or connector between purge VSV and ECM ECM	A
Suction applied	Purge VSV	B

GO TO STEP 28

GO TO STEP 30

25.	CHECK EVAP HOSE (PURGE VSV - INTAKE MANIFOLD)

(a) Disconnect the fuel vapor feed hose assembly (connected to the intake manifold) from the purge VSV.

*1	Purge VSV
*2	Fuel Vapor Feed Hose Assembly (to Intake Manifold)

(b) Start the engine.

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

GO TO STEP 31

26.	INSPECT PURGE VSV

Purge VSV

(a) Remove the purge VSV.

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

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 30

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

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

(a) Disconnect the purge VSV connector.

(b) Turn the ignition switch to ON.

Tester Connection	Condition	Specified Condition	Suspected Trouble Area	Proceed to
C29-1 - Body ground	Ignition switch ON	11 to 14 V	Purge VSV power source normal Wire harness or connector between purge VSV and ECM	A
C29-1 - Body ground	Ignition switch ON	Other than result above	Wire harness or connectors between purge VSV and battery	B

GO TO STEP 29

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

(a) Disconnect the ECM connector.

(b) Disconnect the purge VSV connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
C29-2 - C77-33 (PRG)	Always	Below 1 Ω
C29-2 or C77-33 (PRG) - Body ground	Always	10 kΩ or higher

GO TO STEP 55

GO TO STEP 57

29.	REPAIR OR REPLACE HARNESS OR CONNECTOR (NO. 1 INTEGRATION RELAY - PURGE VSV)

GO TO STEP 59

30.	REPLACE PURGE VSV

(a) Replace the purge VSV.

Click here

GO TO STEP 59

31.	INSPECT INTAKE MANIFOLD (EVAP PURGE PORT)

(a) Stop the engine.

(b) Disconnect the EVAP hose from the intake manifold.

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

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

GO TO STEP 33

32.	REPAIR OR REPLACE EVAP PURGE LINE (INTAKE MANIFOLD - PURGE VSV)

GO TO STEP 59

33.	INSPECT INTAKE MANIFOLD (EVAP PURGE PORT)

(a) Check that the EVAP purge port of the intake manifold is not clogged. If necessary, replace the intake manifold.

Click here

GO TO STEP 59

34.	INSPECT FUEL TANK VENT HOSE SUB-ASSEMBLY

(a) Check for blockages in the fuel tank vent hose between the fuel tank assembly and canister.

OK:

No blockages in the fuel tank vent hose between the fuel tank assembly and canister

REPAIR OR REPLACE FUEL TANK VENT HOSE SUB-ASSEMBLY

35.	INSPECT CANISTER (CHARCOAL FILTER INSIDE CANISTER)

(a) Check for filter blockage in the canister.

Click here

OK:

No blockages in the canister.

GO TO STEP 43

36.	REPLACE FUEL SUCTION TUBE WITH PUMP AND GAUGE ASSEMBLY

(a) Replace the fuel suction tube with pump and gauge assembly.

Click here

GO TO STEP 59

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

*a	Front view of wire harness connector (to Canister Pump Module)

(a) Turn the ignition switch off.

(b) Disconnect the canister pump module connector.

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

Tester Connection	Condition	Specified Condition	Suspected Trouble Area	Proceed to
O133-5 (VLVB) - Body ground	Ignition switch ON	11 to 14 V	Wire harness or connector between vent valve and ECM Vent valve Canister (charcoal filter inside canister) clogged ECM	A
O133-5 (VLVB) - Body ground	Ignition switch ON	Below 3 V	Power source wire harness of vent valve	B

GO TO STEP 57

38.	INSPECT CANISTER PUMP MODULE (VENT VALVE OPERATION)

*a	Component without harness connected (Canister Pump Module)

(a) Turn the ignition switch off.

(b) Disconnect the canister pump module connector.

(d) Touch the canister pump module to confirm the vent valve operation.

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

GO TO STEP 56

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

(a) Turn the ignition switch off.

(b) Disconnect the canister pump module connector.

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

Tester Connection	Condition	Test Result	Suspected Trouble Area	Proceed to
O133-1 (VGND) - A46-395 (VPMP)	Always	Below 1 Ω	Canister (charcoal filter inside canister) clogged ECM	A
O133-1 (VGND) - A46-395 (VPMP)	Always	10 kΩ or higher	Wire harness or connector between ECM and canister pump module	B

GO TO STEP 57

40.	INSPECT CANISTER (CHARCOAL FILTER INSIDE CANISTER)

(a) Check for filter blockage in the canister.

Click here

OK:

No blockages in the canister.

GO TO STEP 43

41.	INSPECT NO. 2 CHARCOAL CANISTER FILTER (CHARCOAL FILTER INSIDE CANISTER)

(a) Check for filter blockage in the No. 2 charcoal canister filter.

Click here

OK:

No blockages in the No. 2 charcoal canister filter.

GO TO STEP 55

42.	REPLACE NO. 2 CHARCOAL CANISTER FILTER

(a) Replace the No. 2 charcoal canister filter.

Click here

NOTICE:

When replacing the No. 2 charcoal canister filter, check the canister interior, 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.

*1	Fuel Tank Vent Hose	*2	Vent Hose
*3	Air Inlet Port	*4	Fuel Tank
*5	Canister Pump Module	*6	Canister
*7	Canister Filter	*8	No. 2 Charcoal Canister Filter
*9	Fuel Tank Cap	-	-
*a	Inspection Area (check for disconnection and/or cracks)	-	-

GO TO STEP 59

43.	REPLACE CANISTER

(a) Replace the canister.

Click here

NOTICE:

When replacing the canister, 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.

*1	Fuel Tank Vent Hose	*2	Vent Hose
*3	Air Inlet Port	*4	Fuel Tank
*5	Canister Pump Module	*6	Canister
*7	Canister Filter	*8	No. 2 Charcoal Canister Filter
*9	Fuel Tank Cap	-	-
*a	Inspection Area (check for disconnection and/or cracks)	-	-

GO TO STEP 59

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

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

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 56

GO TO STEP 52

45.	INSPECT CANISTER PUMP MODULE (VENT VALVE OPERATION)

*a	Component without harness connected (Canister Pump Module)

(a) Turn the ignition switch off.

(b) Disconnect the canister pump module connector.

(d) Touch the canister pump module to confirm the vent valve operation.

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 56

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

(a) Turn the ignition switch off.

(b) Disconnect the canister pump module connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
O133-1 (VGND) - A46-39 (VPMP)	Always	Below 1 Ω
O133-1 (VGND) or A46-39 (VPMP) - Body ground and other terminals	Always	10 kΩ or higher

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 57

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

(a) Turn the ignition switch off.

(b) Disconnect the canister pump module connector.

Tester Connection	Condition	Specified Condition	Suspected Trouble Area	Proceed to
O133-4 (MGND) - Body ground	Always	Below 1 Ω	Canister pump module Wire harness or connector between ECM and canister pump module ECM	A
O133-4 (MGND) - Body ground	Always	10 kΩ or higher	Wire harness or connector between canister pump module and body ground	B

GO TO STEP 57

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

(a) Turn the ignition switch off.

(b) Disconnect the ECM connector.

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

Tester Connection	Condition	Specified Condition	Suspected Trouble Area	Proceed to
O133-3 (MTRB) - A46-38 (MPMP)	Always	Below 1 Ω	Canister pump module ECM	A
O133-3 (MTRB) - A46-38 (MPMP)	Always	10 kΩ or higher	Wire harness or connector between ECM and canister pump module	B

GO TO STEP 57

49.	REPLACE CANISTER PUMP MODULE

(a) Replace the canister pump module.

Click here

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.
Check for filter blockage in the canister. If the charcoal filter inside the canister is clogged, replace canister and canister pump module together.
Check for filter blockage in the canister filter. If the canister filter has blockages, replace the canister filter.

*1	Fuel Tank Vent Hose	*2	Vent Hose
*3	Air Inlet Port	*4	Fuel Tank
*5	Canister Pump Module	*6	Canister
*7	Canister Filter	*8	No. 2 Charcoal Canister Filter
*9	Fuel Tank Cap	-	-
*a	Inspection Area (check for disconnection and/or cracks)	-	-

50.

CLEAR DTC

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(d) Clear the DTC.

Powertrain > Engine and ECT > Clear DTCs

(e) Turn the ignition switch off and wait for at least 30 seconds.

51.	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 85% 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 higher, 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).
The Evaporative System Check can be performed only once in one trip.
If an Evaporative System Check needs to be performed again, turn the ignition switch off and wait for 5 minutes or more before performing another check.

(a) Turn the ignition switch to ON.

(b) Turn the Techstream on.

Powertrain > Engine and ECT > Utility

Tester Display
Evaporative System Check

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

Powertrain > Engine and ECT > Trouble Codes

Result

Proceed to

EVAP system DTCs are output

DTCs are not output

(Pending DTC is not output)

GO TO STEP 55

END

52.	CHECK TERMINAL VOLTAGE (CANISTER PUMP MODULE)

*a	Front view of wire harness connector (to Canister Pump Module)

(a) Turn the ignition switch off.

(b) Disconnect the canister pump module connector.

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

Tester Connection	Condition	Test Result	Suspected Trouble Area	Proceed to
O133-3 (MTRB) - Body ground	Ignition switch ON	9 to 14 V	Wire harness or connector between leak detection pump and body ground Leak detection pump	A
O133-3 (MTRB) - Body ground	Ignition switch ON	Below 3 V	Wire harness or connector between leak detection pump and ECM ECM	B

GO TO STEP 54

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

(a) Turn the ignition switch off.

(b) Disconnect the canister pump module connector.

Tester Connection	Condition	Specified Condition	Suspected Trouble Area	Proceed to
O133-4 (MGND) - Body ground	Always	Below 1 Ω	Leak detection pump	A
O133-4 (MGND) - Body ground	Always	10 kΩ or higher	Wire harness or connector between canister pump module and body ground	B

GO TO STEP 56

GO TO STEP 57

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

(a) Turn the ignition switch off.

(b) Disconnect the canister pump module connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
O133-3 (MTRB) - A46-38 (MPMP)	Always	Below 1 Ω
O133-3 (MTRB) or A46-38 (MPMP) - Body ground and other terminals	Always	10 kΩ or higher

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

GO TO STEP 57

55.	REPLACE ECM

(a) Replace the ECM.

Click here

GO TO STEP 59

56.	REPLACE CANISTER PUMP MODULE

(a) Replace the canister pump module.

Click here

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.
Check for filter blockage in the canister. If the charcoal filter inside the canister is clogged, replace canister and canister pump module together.
Check for filter blockage in the canister filter. if the canister filter has blockages, replace the canister filter.

*1	Fuel Tank Vent Hose	*2	Vent Hose
*3	Air Inlet Port	*4	Fuel Tank
*5	Canister Pump Module	*6	Canister
*7	Canister Filter	*8	No. 2 Charcoal Canister Filter
*9	Fuel Tank Cap	-	-
*a	Inspection Area (check for disconnection and/or cracks)	-	-

GO TO STEP 59

57.	REPAIR OR REPLACE HARNESS OR CONNECTOR

GO TO STEP 59

58.	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.

Click here

59.

CLEAR DTC

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(d) Clear the DTC.

Powertrain > Engine and ECT > Clear DTCs

(e) Turn the ignition switch off and wait for at least 30 seconds.

60.	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 85% 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 higher, 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).
The Evaporative System Check can be performed only once in one trip.
If an Evaporative System Check needs to be performed again, turn the ignition switch off and wait for 5 minutes or more before performing another check.

(a) Turn the ignition switch to ON.

(b) Turn the Techstream on.

Powertrain > Engine and ECT > Utility

Tester Display
Evaporative System Check

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

Powertrain > Engine and ECT > Trouble Codes

HINT:

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

END