Sfi System - Evap System

1. Monitor result

2. Related dtcs

3. Description

4. Wiring diagram

5. Inspection procedure

6. Confirm dtc

7. Perform evap system check (auto operation)

8. Perform evap system check (manual operation)

9. Perform evap system check (step 1/5)

10. Perform evap system check (step 1/5 to 2/5)

11. Perform evap system check (step 2/5)

12. Perform evap system check (step 2/5 to 3/5)

13. Perform evap system check (step 3/5)

14. Perform evap system check (step 4/5)

15. Perform evap system check (step 5/5)

16. Perform evap system check (step 3/5)

17. Perform active test by intelligent tester (purge vsv)

18. Check fuel cap

19. Inspect purge vsv

20. Check evap hose (purge vsv - intake manifold)

21. Inspect duty purge vsv

22. Check harness and connector (power source of purge vsv)

23. Check harness and connector (purge vsv - ecm)

24. Perform active test by intelligent tester (for vent valve)

25. Perform active test by intelligent tester (for vent valve)

26. Inspect canister pump module (power source for vent valve)

27. Inspect canister pump module (vent valve operation)

28. Perform active test by intelligent tester (for canister pump module [leak detection pump])

29. Check harness and connector (canister pump module - ecm)

30. Check harness and connector (canister pump module - ground)

31. Inspect intake manifold (evap purge port)

32. Correctly reinstall or replace fuel cap

33. Replace fuel cap

34. Locate evap leak

35. Replace canister assembly

36. Replace duty purge vsv

37. Repair or replace harness and connector

38. Replace evap hose (intake manifold - purge vsv)

39. Inspect intake manifold (evap purge port)

40. Replace ecm

41. Repair or replace parts and components indicated by output dtcs

42. Perform evap system check (auto operation)

43. Confirmation driving pattern

44. Monitor result

SFI SYSTEM > EVAP System

​

MONITOR RESULT

1. MID (Monitor Identification Data) is assigned to each emissions-related component.
   
2. TID (Test Identification Data) is assigned to each test value.
   
3. Scaling is used to calculate the test value indicated on generic OBD II scan tools.
   
   

   EVAP-Key-off monitor

   MID	TID	Scaling	Description of Test Value	Minimum Test Limit	Maximum Test Limit
   $3D	$C9	Multiply by 0.01 (kPa)	Test value for small leak (P0456): Refer to pressure D*.	Minimum test limit for small leak	Maximum test limit for small leak
   $3D	$CA	Multiply by 0.01 (kPa)	Test value for gross leak (P0455): Refer to pressure E*.	Minimum test limit for gross leak	Maximum test limit for gross leak
   $3D	$CB	Multiply by 0.01 (kPa)	Test value for vacuum pump stuck OFF (P2401): Refer to pressure A*.	Minimum test limit for vacuum pump stuck OFF	Maximum test limit for vacuum pump stuck OFF
   $3D	$CD	Multiply by 0.01 (kPa)	Test value for vacuum pump stuck ON (P2402): Refer to pressure A*.	Minimum test limit for vacuum pump stuck ON	Maximum test limit for vacuum pump stuck ON
   $3D	$CE	Multiply by 0.01 (kPa)	Test value for vent valve stuck OFF (vent) (P2420): Refer to pressure C*.	Minimum test limit for vent valve stuck ON	Maximum test limit for vent valve stuck ON
   $3D	$CF	Multiply by 0.01 (kPa)	Test value for vent valve stuck ON (closed) (P2419): Refer to pressure A*.	Minimum test limit for vent valve stuck OFF	Maximum test limit for vent valve stuck OFF
   $3D	$D0	Multiply by 0.01 (kPa)	Test value for 0.02 inch orifice low flow (P043E): Refer to pressure B*.	Minimum test limit for 0.02 inch orifice low flow	Maximum test limit for 0.02 inch orifice low flow
   $3D	$D1	Multiply by 0.01 (kPa)	Test value for 0.02 inch orifice high flow (P043F): Refer to pressure A*.	Minimum test limit for 0.02 inch orifice high flow	Maximum test limit for 0.02 inch orifice high flow
   $3D	$D4	Multiply by 0.01 (kPa)	Test value for purge VSV stuck close (P0441): Refer to pressure F*.	Minimum test limit for purge VSV stuck close	Maximum test limit for purge VSV stuck close
   $3D	$D5	Multiply by 0.01 (kPa)	Test value for purge VSV stuck open (P0441): Refer to pressure E*.	Minimum test limit for purge VSV stuck open	Maximum test limit for purge VSV stuck open
   $3D	$D7	Multiply by 0.01 (kPa)	Test value for purge flow (P0441): Refer to pressure G*.	Minimum test limit for purge flow	Maximum test limit for purge flow

   * Pressures A to G are indicated as shown in the diagram on below.
   
   
   
   
   
   

RELATED DTCS

NOTICE:

If the 0.02 inch leak criterion difference between the first and second checks is greater than the specification, the DTCs corresponding to the 0.02 inch leak criterion (P043E, P043F, P0441, P0455, P0456, P2401 and P2420) will all be stored.

DESCRIPTION

NOTICE:

In this vehicle's EVAP system, 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 atmosphere side of the canister.

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.

1. The 1st monitor
   While the engine is running and the purge Vacuum Switching Valve (VSV) 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.
   
2. The 2nd monitor
   The vent valve turned OFF (open) and the EVAP pressure is then measured. If the variation in the pressure is less than 0.5 kPa (3.75 mmHg), the ECM interprets this as the purge VSV being stuck closed, and illuminates the MIL and sets 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 conduction of the purge flow monitor, is measured by the ECM.
   
   
   
   
   
   
   

   Components	Operations
   Canister	Contains activated charcoal to absorb EVAP generated in fuel tank.
   Cut-off valve	Located in fuel tank. Valve floats and closes when fuel tank 100% full.
   Purge Vacuum Switching Valve (VSV)	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 ratio (current-carrying time) (open: ON, closed: OFF).
   Refueling valve	Controls EVAP pressure from fuel tank to canister. Valve consists of diaphragm, spring and restrictor (diameter: 0.08 inch). When fuel vapor and pressure inside fuel tank increase, valve opens. While EVAP purged, valve closes and restrictor prevents large amount of vacuum from affecting pressure in fuel tank. Valve opens while refueling.
   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 OFF. This allows fuel to cool down, stabilizing Fuel Tank Pressure (FTP). When approximately 5 hours* elapsed, ECM activates.
   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 closed. When, ECM turns valve OFF, EVAP system vented. Negative pressure (vacuum) created in EVAP system to check for EVAP leaks by closing purge VSV, turning vent valve ON (closed) and operating leak detection pump (refer to fig. 1).
   (b) Canister pressure sensor	Indicates pressure as voltage. ECM supplies regulated 5 V to canister 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 produced through orifice by closing purge VSV, turning vent valve OFF and operating leak detection pump, to monitor 0.02 inch leak criterion. 0.02 inch leak criterion indicates small leak of EVAP.

   HINT:

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

   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   

WIRING DIAGRAM

INSPECTION PROCEDURE

NOTICE:

The intelligent tester is required to conduct the following diagnostic troubleshooting procedure.

HINT:

1. Using the intelligent tester monitor results enables the EVAP system to be confirmed.
   
2. Read freeze frame data using the intelligent tester. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air/fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction.
   

1. Turn the ignition switch OFF and wait for 10 seconds.

2. Turn the ignition switch ON.

3. Turn the ignition switch OFF and wait for 10 seconds.

4. Connect the intelligent tester to the DLC3 with CAN VIM.

5. Turn the ignition switch ON.

6. Enter the following menus: DIAGNOSIS / ENHANCED OBD II/ DTC INFO / CURRENT CODES.

7. Confirm DTCs and freeze frame data.
   If any EVAP system DTCs are set, the malfunctioning area can be determined using the table below.

   NOTICE:

   If the 0.02 inch leak criterion difference between the first and second checks is greater than the specification, the DTCs corresponding to the 0.02 inch leak criterion (P043E, P043F, P0441, P0455, P0456, P2401 and P2420) will all be stored.

   
   
   
   

NEXT

NOTICE:

1. The EVAP SYSTEM CHECK (AUTO OPERATION) consists of five steps performed automatically by the intelligent tester. It takes a maximum of approximately 18 minutes.
   
2. Do not perform the EVAP SYSTEM CHECK when the fuel tank is more than 90 % full because the cut-off valve may be closed, making the leak check of the fuel tank not possible.
   
3. Do not run the engine in this step.
   
4. 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 EVAP SYSTEM CHECK, keep the temperature below 35°C (95°F).
   

1. Clear the DTCs (Click here).

2. Enter the following menus: DIAGNOSIS / ENHANCED OBD II / SYSTEM CHECK / EVAP SYS CHECK / AUTO OPERATION.

3. After the EVAP SYSTEM CHECK is completed, check for pending DTCs by entering the following menus: DIAGNOSIS / ENHANCED OBD II / DTC INFO / PENDING CODES.

   HINT:

   If no pending DTC is displayed, perform the Monitor Confirmation (see "Diagnostic Help" menu). After this confirmation, check for pending DTCs. If no DTC is displayed, the EVAP system is normal.

NEXT

NOTICE:

1. In the EVAP SYSTEM CHECK (MANUAL OPERATION), the series of 5 EVAP SYSTEM CHECK steps are performed manually by the intelligent tester.
   
2. Do not perform the EVAP SYSTEM CHECK when the fuel tank is more than 90 % full because the cut-off valve may be closed, making the leak check of the fuel tank not possible.
   
3. Do not run the engine in this step.
   
4. 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 EVAP SYSTEM CHECK, keep the temperature below 35°C (95°F).
   

1. Clear the DTCs (Click here).

2. Enter the following menus: DIAGNOSIS / ENHANCED OBD II / SYSTEM CHECK / EVAP SYS CHECK / MANUAL OPERATION.

NEXT

1. Check the EVAP pressure in step 1/5.
   

   Result:

   
   

   DTC No. *	Test Results	Suspected Trouble Areas	Proceed to
   -	Virtually no variation in EVAP pressure	Not yet determined	A
   P0451	EVAP pressure fluctuates by +-0.3 kPa (2.25 mmHg) or more	Canister pressure sensor noise	B

   *: These DTCs are already present in the ECM when the vehicle arrives and are confirmed in step 1.
   

B	Go to step 30

A

1. Check the EVAP pressure in step 1/5 and 2/5.
   

   Result:

   
   

   DTC No. *	Test Results	Suspected Trouble Areas	Proceed to
   -	Virtually no variation in EVAP pressure during step 1/5. Then decreases to 0.02 inch leak criterion	Not yet determined	A
   P2402	Small difference between EVAP pressures during steps 1/5 and 2/5	Leak detection pump stuck ON	B

   *: These DTCs are already present in the ECM when the vehicle arrives and are confirmed in step 1.
   

   HINT:

   The first 0.02 inch leak criterion is the value determined in step 2/5.

B	Go to step 23

A

HINT:

Make a note of the pressures checked in the steps below.

1. Check the EVAP pressure 4 seconds after the leak detection pump is activated* [A}.

2. Check the EVAP pressure again when it has stabilized. This pressure is the 0.02 inch leak criterion [B}.
   *: The leak detection pump begins to operate as step 1/5 proceeds to step 2/5.
   

   Result:

   
   

   DTC No. *	Test Results	Suspected Trouble Areas	Proceed to
   -	EVAP pressure in step [B] between -4.85 kPa and -1.06 kPa (-36.38 mmHg and -7.95 mmHg)	Not yet determined	A
   P043F and P2401	EVAP pressure in step [B] -1.06 kPa (-7.95 mmHg) or more	Reference orifice high-flow Leak detection pump stuck OFF	B
   P043E	EVAP pressure in step [B] below -4.85 kPa (-36.38 mmHg)	Reference orifice clogged	C
   P2419	EVAP pressure in step [A] more than -1.06 kPa (-7.95 mmHg)	Vent valve stuck closed	D

   *: These DTCs are already present in the ECM when the vehicle arrives and are confirmed in step 1.
   

B	Go to step 11
C	Go to step 30
D	Go to step 19

A

1. Check the EVAP pressure in step 3/5.
   

   Result:

   
   

   DTC No. *	Test Results	Suspected Trouble Areas	Proceed to
   -	EVAP pressure increases by 0.3 kPa (2.25 mmHg) or more within 10 seconds of proceeding from step 2/5 to step 3/5	Not yet determined	A
   P2420	No variation in EVAP pressure despite proceeding from step 2/5 to step 3/5	Vent valve stuck open (vent)	B
   P0451	No variation in EVAP pressure during steps 1/5 through 3/5	Canister pressure sensor malfunction (stuck)	C

   *: These DTCs are already present in the ECM when the vehicle arrives and are confirmed in step 1.
   

B	Go to step 20
C	Go to step 30

A

1. Wait until the EVAP pressure change is less than 0.1 kPa (0.75 mmHg) for 30 seconds.

2. 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 (900 seconds).

NEXT

1. Check the EVAP pressure in step 4/5.
   

   Result:

   
   

   DTC No. *	Test Results	Suspected Trouble Areas	Proceed to
   -	EVAP pressure increases by 0.3 kPa (2.25 mmHg) or more within 10 seconds of proceeding from step 3/5 to step 4/5	Not yet determined	A
   P0441	EVAP pressure increases by 0.3 kPa (2.25 mmHg) or more within 10 seconds of proceeding from step 3/5 to step 4/5	Problems in EVAP hose between purge VSV and intake manifold	B
   P0441	Variation in EVAP pressure less than 0.3 kPa (2.25 mmHg) for 10 seconds, after proceeding from step 3/5 to step 4/5	Purge VSV stuck closed	C

   *: These DTCs are already present in the ECM when the vehicle arrives and are confirmed in step 1.
   

B	Go to step 15
C	Go to step 12

A

1. Check the EVAP pressure in step 5/5.

2. Compare the EVAP pressure in step 3/5 and the second 0.02 inch leak criterion (step 5/5).
   

   Result:

   
   

   DTC No. *	Test Results	Suspected Trouble Areas	Proceed to
   -	EVAP pressure (step 3/5) lower than second 0.02 inch leak criterion (step 5/5)	Not yet determined	A
   P0441 and P0455	EVAP pressure (step 3/5) higher than [second 0.02 inch leak criterion (step 5/5) x 0.2]	Purge VSV stuck open EVAP gross leak	B
   P0456	EVAP pressure (step 3/5) higher than second 0.02 inch leak criterion (step 5/5)	EVAP small leak	C

   *: These DTCs are already present in the ECM when the vehicle arrives and are confirmed in step 1.
   

A	Go to step 36
B	Go to step 12

1. Check the EVAP pressure in step 3/5.
   

   Result:

   
   

   DTC No. *	Test Results	Suspected Trouble Areas	Proceed to
   P043F	EVAP pressure less than [0.02 inch leak criterion] measured at 2/5	Reference orifice high-flow	A
   P2401	EVAP pressure almost same as [0.02 inch leak criterion] measured at 2/5	Leak detection pump stuck OFF	B

   *: These DTCs are already present in the ECM when the vehicle arrives and are confirmed in step 1.
   

   HINT:

   The first 0.02 inch leak criterion is the value determined in step 2/5.

A	Go to step 30
B	Go to step 23

1. Enter the following menus: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / EVAP VSV.

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

3. Turn the ignition switch ON.

4. Using the tester, turn the purge VSV OFF (EVAP VSV: OFF).

5. Use your finger to confirm that the purge VSV has no suction.

6. Using the tester, turn the purge VSV ON (EVAP VSV: ON).

7. Use your finger to confirm that the purge VSV has suction.
   

   Result:

   
   

   Test Results	Suspected Trouble Areas	Proceed to
   No suction when purge VSV turned OFF, and suction applied when turned ON	Purge VSV normal	A
   Suction applied when purge VSV turned OFF	Purge VSV stuck open	B
   No suction when purge VSV turned ON	Purge VSV stuck closed Problems with EVAP hose between purge VSV and intake manifold	C

B	Go to step 14
C	Go to step 15

A

1. Check that the fuel cap is correctly installed.

   1. Tighten the fuel cap until a few click sounds are heard.

      HINT:

      If an EVAP tester is available, use the tester to check the fuel cap.

2. Remove the fuel cap and install it onto the fuel cap adaptor.

3. Connect an EVAP tester pump hose to the adaptor, and pressurize the cap to 3.2 to 3.7 kPa (24 to 28 mmHg) using an EVAP tester pump.

4. Seal the adaptor and wait for 2 minutes.

5. Check the pressure. If the pressure is 2 kPa (15 mmHg) or more, the fuel cap is normal.

6. Reinstall the fuel cap.
   

   Result:

   
   

   Test Results	Suspected Trouble Areas	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
   No fuel cap	-	C

A	Go to step 29
B	Go to step 27
C	Go to step 28

1. Turn the ignition switch OFF.

2. Disconnect the V2 purge VSV connector.

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

4. Start the engine.

5. Use your finger to confirm that the purge VSV has no suction.
   

   Result:

   
   

   Test Results	Suspected Trouble Areas	Proceed to
   No suction	ECM	A
   Suction applied	Purge VSV	B

6. Reconnect the purge VSV connector.

A	Go to step 35
B	Go to step 31

1. Disconnect the hose (connected to the intake manifold) from the purge VSV.

2. Start the engine.

3. Use your finger to confirm that the hose has suction.
   

   Result:

   
   

   Test Results	Suspected Trouble Areas	Proceed to
   Suction applied	EVAP hose between purge VSV and intake manifold normal	A
   No suction	Intake manifold port EVAP hose between purge VSV and intake manifold	B

B	Go to step 26

A

1. Remove the purge VSV connector.

2. Apply battery voltage to the terminals of the purge VSV.

3. Using an air gun, confirm that air flows from port A to port B.
   

   Result:

   
   

   Test Results	Suspected Trouble Areas	Proceed to
   Air flows	Purge VSV normal	A
   No air flows	Purge VSV	B

B	Go to step 31

A

1. Disconnect the V2 purge VSV connector.

2. Turn the ignition switch ON.

3. Measure the voltage between terminal 1 of the purge VSV connector and the body ground.
   

   Result:

   
   

   Test Results	Suspected Trouble Areas	Proceed to
   Between 11 V and 14 V	Normal	A
   Other than result above	Wire harness or connectors between purge VSV and ECM	B

4. Reconnect the purge VSV connector.

B	Go to step 32

A

1. Disconnect the V2 purge VSV connector.

2. Disconnect the E4 ECM connector.

3. Measure the resistance of the wire harness side connectors.

   Standard resistance:

   Tester Connection	Specified Condition
   V2-1 - PRG (E4-34)	Below 1 Ω
   V2-1 or PRG (E4-34) - Body ground	10 kΩ or higher
   V2-1 - Body ground

4. Reconnect the ECM connector.

5. Reconnect the purge VSV connector.

OK	Go to step 35
NG	Go to step 32

1. Turn the ignition switch ON.

2. Enter the following menus: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / VENT VALVE (ALONE).

3. Measure the voltage between terminal VPMP of the ECM connector and the body ground when the vent valve is turned ON (close) and OFF (vent) using the tester.
   

   Result:

   
   

   Test Results	Suspected Trouble Areas	Proceed to
   Between 9 V and 14 V when OFF Below 3 V when ON	Vent valve	A
   Below 3 V when OFF and ON	ECM	B

A	Go to step 22
B	Go to step 35

1. Turn the ignition switch ON.

2. Enter the following menus: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / VENT VALVE (ALONE).

3. Measure the voltage between terminal VPMP of the ECM connector and the body ground when the vent valve is turned ON (close) and OFF (vent) using the tester.
   

   Result:

   
   

   Test Results	Suspected Trouble Areas	Proceed to
   Below 3 V when OFF and ON	Power source of vent valve	A
   Between 9 V and 14 V when OFF Below 3 V when ON	Vent valve	B
   Between 9 V and 14 V when OFF and ON	ECM	C

B	Go to step 22
C	Go to step 35

A

1. Turn the ignition switch OFF.

2. Disconnect the L4 canister connector.

3. Turn the ignition switch ON.

4. Measure the voltage between terminal 9 of the canister connector and the body ground.
   

   Result:

   
   

   Test Results	Suspected Trouble Areas	Proceed to
   Between 9 V and 14 V	Normal	A
   Between 0 V and 3 V	Power source wire harness of vent valve	B

B	Go to step 32

A

1. Turn the ignition switch OFF.

2. Disconnect the L4 canister connector.

3. Apply the battery voltage to terminals 9 and 8 of the canister pump module.

4. Touch the canister pump module to confirm the vent valve operation.
   

   Result:

   
   

   Test Results	Suspected Trouble Areas	Proceed to
   Operating	Wire harness between vent valve and ECM	A
   Not operating	Vent valve	B

5. Reconnect the canister connector.

A	Go to step 32
B	Go to step 30

1. Enter the following menus: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / VACUUM PUMP (ALONE).

2. Measure the voltage between MPMP terminal of the ECM connector and the body ground when the leak detection pump is turned ON and OFF using the tester.
   

   Result:

   
   

   Test Results	Suspected Trouble Areas	Proceed to
   Between 0 V and 3 V when OFF Between 9 V and 14 V when ON	ECM normal	A
   Between 9 V and 14 V when OFF Between 0 V and 3 V when ON	ECM	B

B	Go to step 35

A

1. Turn the ignition switch OFF.

2. Disconnect the L4 canister connector.

3. Turn the ignition switch ON.

4. Enter the following menus: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / VACUUM PUMP (ALONE).

5. Turn the leak detection pump ON.

6. Measure the voltage between terminal 1 of the canister connector and the body ground.
   

   Result:

   
   

   Test Results	Suspected Trouble Areas	Proceed to
   Between 9 V and 14 V	Normal	A
   Between 0 V and 3 V	Wire harness between ECM and leak detection pump	B

7. Reconnect the canister connector.

B	Go to step 32

A

1. Disconnect the L4 canister connector.

2. Turn the ignition switch OFF.

3. Measure the resistance of the wire harness side connectors between terminal 6 of the canister connector and the body ground.
   

   Result:

   
   

   Test Results	Suspected Trouble Areas	Proceed to
   Below 1 Ω	Leak detection pump	A
   10 kΩ or higher	Wire harness between leak detection pump and body ground	B

4. Reconnect the canister connector.

A	Go to step 30
B	Go to step 32

1. Turn the ignition switch OFF.

2. Disconnect the EVAP hose from the throttle body.

3. Start the engine.

4. Use your finger to confirm that the port of the throttle body has suction.
   

   Result:

   
   

   Test Results	Suspected Trouble Areas	Proceed to
   Suction applied	EVAP hose between intake manifold and purge VSV	A
   No suction	Intake manifold	B

A	Go to step 33
B	Go to step 34

HINT:

1. When reinstalling the fuel cap, tighten it until a few click sounds are heard.
   
2. When replacing the fuel cap, use a fuel cap that meets OEM specifications, and tighten it until a few click sounds are heard.
   

NEXT	Go to step 37

HINT:

When installing the fuel cap, tighten it until a few click sounds are heard.

NEXT	Go to step 37

1. Reinstall the fuel cap.

2. Disconnect the vent hose.

   
   
   
   

3. Connect the EVAP pressure tester tool to the canister with the adapter.

   
   
   
   

4. Pressurize the EVAP system to 3.2 to 3.7 kPa (24 to 28 mmHg).

5. Apply soapy water to the piping and connecting parts of the EVAP system.

6. Look for areas where bubbles appear. This indicates leak point.

7. Repair or replace the leak point.

HINT:

Disconnect the hose between the canister and the 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.

NEXT	Go to step 37

1. Replace the canister assembly.

   NOTICE:

   When replacing the canister, check the canister pump module interior and related pipes for water, fuel or 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.

NEXT	Go to step 37

1. Disconnect the connector and hoses from the purge VSV.

2. Remove the purge VSV.

3. Install a new purge VSV.

4. Reconnect the connector and hose.

NEXT	Go to step 37

NEXT	Go to step 37

NEXT	Go to step 37

1. Remove the throttle body (Click here).

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

NEXT	Go to step 37

1. Replace the ECM (Click here).

NEXT	Go to step 37

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

NEXT	Go to step 37

NOTICE:

1. The EVAP SYSTEM CHECK (AUTO OPERATION) consists of five steps performed automatically by the intelligent tester. It takes a maximum of approximately 18 minutes.
   
2. Do not perform the EVAP SYSTEM CHECK when the fuel tank is more than 90 % full because the cut-off valve may be closed, making the leak check of the fuel tank not possible.
   
3. Do not run the engine in this step.
   
4. 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 EVAP SYSTEM CHECK, keep the temperature below 35°C (95°F).
   

1. Clear the DTCs (Click here).

2. Enter the following menus: DIAGNOSIS / ENHANCED OBD II / SYSTEM CHECK / EVAP SYS CHECK / AUTO OPERATION.

3. After the SYSTEM CHECK is completed, check for pending DTCs by entering the following menus: DIAGNOSIS / ENHANCED OBD II / DTC INFO / PENDING CODES.

   HINT:

   If no pending DTC is found, the repair has been successfully completed.

NEXT
COMPLETED

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. Preconditions
   The monitor will not run unless:

   1. The vehicle has been driven for 10 minutes or more (in a city area or on a freeway)
      
   2. The fuel tank is less than 90 % full
      
   3. The altitude is less than 8,000 ft (2,400 m)
      
   4. The Engine Coolant Temperature (ECT) is between 4.4 to 35°C (40 to 95°F)
      
   5. The Intake Air Temperature (IAT) is between 4.4 to 35°C (40 to 95°F)
      
   6. The vehicle remains stationary (the vehicle speed is 0 km/h (0 mph))
      

2. Monitor Conditions

   1. Allow the engine to idle for at least 5 minutes.
      
   2. 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.

3. Monitor Status

   1. Connect the intelligent tester to the CAN VIM. Then connect the CAN VIM to the DLC3.
      
   2. Turn the ignition switch ON and turn the tester ON.
      
   3. Enter the following menus: DIAGNOSIS / ENHANCED OBD II / MONITOR STATUS.
      
   4. Check the Monitor Status displayed on the tester.
      

      HINT:

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

HINT:

Perform this monitor confirmation after the key-off monitor confirmation shows COMPL (complete).

1. Preconditions
   The monitor will not run unless:

   1. The vehicle has been driven for 10 minutes or more (in a city area or on a freeway)
      
   2. The ECT is between 4.4 to 35°C (40 to 95°F)
      
   3. The IAT is between 4.4 to 35°C (40 to 95°F)
      

2. Monitor Conditions

   1. Release the pressure from the fuel tank by removing and reinstalling the fuel cap.
      
   2. Warm the engine up until the ECT reaches more than 75°C (167°F).
      
   3. Increase the engine speed to 3,000 rpm once.
      
   4. Allow the engine to idle and turn the A/C ON for 1 minute.
      

3. Monitor Status

   1. Turn the ignition switch OFF (where ON or the engine is running).
      
   2. Connect the intelligent tester to the CAN VIM. Then connect the CAN VIM to the DLC3.
      
   3. Turn the ignition switch ON and turn the tester ON.
      
   4. Enter the following menus: DIAGNOSIS / ENHANCED OBD II / MONITOR STATUS.
      
   5. Check the Monitor Status displayed on the tester.
      

      HINT:

      If INCMP is displayed, the monitor is not completed. Make sure that the preconditions have been met, and perform the "Monitor Conditions" procedures again.

MONITOR RESULT

1. Monitor Identification Data (MID) is assigned to each emissions-related component.
   
2. Test Identification Data (TID) is assigned to each test value.
   
3. Scaling is used to calculate the test value indicated on generic OBD II scan tools.
   
   

   EVAP

   MID	TID	Scaling	Description of Test Value	Minimum Test Limit	Maximum Test Limit
   $3D	$C9	Multiply by 0.001 [kPa]	Test value for small leak (P0456) Refer to pressure D*	Minimum test limit for small leak	Maximum test limit for small leak
   $3D	$CA	Multiply by 0.001 [kPa]	Test value for gross leak (P0455) Refer to pressure E*	Minimum test limit for gross leak	Maximum test limit for gross leak
   $3D	$CB	Multiply by 0.001 [kPa]	Test value for leak detection pump stuck OFF (P2401) Refer to pressure A*	Minimum test limit for leak detection pump stuck OFF	Maximum test limit for leak detection pump stuck OFF
   $3D	$CD	Multiply by 0.001 [kPa]	Test value for leak detection pump stuck ON (P2402) Refer to pressure A*	Minimum test limit for leak detection pump stuck ON	Maximum test limit for leak detection pump stuck ON
   $3D	$CE	Multiply by 0.001 [kPa]	Test value for vent valve stuck OFF (vent) (P2420) Refer to pressure C*	Minimum test limit for vent valve stuck ON	Maximum test limit for vent valve stuck ON
   $3D	$CF	Multiply by 0.001 [kPa]	Test value for vent valve stuck ON (P2419) Refer to pressure A*	Minimum test limit for vent valve stuck OFF	Maximum test limit for vent valve stuck OFF
   $3D	$D0	Multiply by 0.001 [kPa]	Test value for reference orifice low flow (P043E) Refer to pressure B*	Minimum test limit for reference orifice low flow	Maximum test limit for reference orifice low flow
   $3D	$D1	Multiply by 0.001 [kPa]	Test value for reference orifice high flow (P043F) Refer to pressure A*	Minimum test limit for reference orifice high flow	Maximum test limit for reference orifice high flow
   $3D	$D4	Multiply by 0.001 [kPa]	Test value for purge VSV stuck closed (P0441) Refer to pressure F*	Minimum test limit for purge VSV stuck closed	Maximum test limit for purge VSV stuck closed
   $3D	$D5	Multiply by 0.001 [kPa]	Test value for purge VSV stuck open (P0441) Refer to pressure E*	Minimum test limit for purge VSV stuck open	Maximum test limit for purge VSV stuck open
   $3D	$D7	Multiply by 0.001 [kPa]	Test value for purge flow (P0441) Refer to pressure G*	Minimum test limit for purge flow	Maximum test limit for purge flow

   *: Pressures A to G are indicated as shown in the diagram below.