Sfi System - Evap System

1. Related dtcs

2. Confirmation driving pattern

3. Monitor result

4. Description

5. Wiring diagram

6. Inspection procedure

7. Confirm dtc

8. Perform evap system check (auto operation)

9. Perform evap system check (manual operation)

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

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

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

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

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

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

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

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

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

19. Check fuel tank cap assembly

20. Inspect no. 1 vacuum switching valve

21. Check evap hose (purge vsv - throttle body)

22. Inspect no. 1 vacuum switching valve (purge vsv)

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

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

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

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

27. Inspect pump module (power source for vent valve)

28. Inspect pump module (vent valve operation)

29. Perform active test by intelligent tester (for pump module (vacuum pump))

30. Check harness and connector (pump module - ecm)

31. Check harness and connector (pump module - ground)

32. Inspect throttle with motor body assembly

33. Correctly reinstall or replace fuel tank cap

34. Replace fuel tank cap assembly

35. Locate evap leak

36. Replace charcoal canister assembly

37. Replace no. 1 vacuum switching valve (purge vsv)

38. Repair or replace harness or connector

39. Replace evap hose (throttle body - purge vsv)

40. Inspect throttle with motor body assembly

41. Replace ecm

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

43. Perform evap system check (auto operation)

SFI SYSTEM > EVAP System

​

RELATED DTCS

NOTICE:

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

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°C and 35°C (40°F and 95°F)

   5. The Intake Air Temperature (IAT) is between 4.4°C and 35°C (40°F and 95°F)

   6. The vehicle remains stationary (the vehicle speed is 0 mph [0 km/h])

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 an intelligent tester to the DLC3.

   2. Turn the ignition switch on and turn the tester on.

   3. Select the following menu items: 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°C and 35°C (40°F and 95°F)
      
   3. The IAT is between 4.4°C and 35°C (40°F and 95°F)
      

2. Monitor Conditions
   

   1. Release the pressure from the fuel tank by removing and reinstalling the fuel tank 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.

   2. Connect the intelligent tester to the DLC3.

   3. Turn the ignition switch to on and turn the tester on.

   4. Select the following menu items: 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 again.

MONITOR RESULT

1. Refer to Checking Monitor Status for detailed information (Click here).
   
2. The test value and test limit information are described as shown in the following table. This information is included under MONITOR RESULT in the emissions-related DTC sections:
   
3. 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.
      
      

      Thermostat

      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 (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 closed	Maximum test limit for purge VSV stuck closed
      $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 the next page.
      
      
      
      
      
      

DESCRIPTION

HINT:

The canister is located near the fuel tank, underneath the body.

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 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.
   
2. The 2nd monitor
   The vent valve is 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).
   

1. Atmospheric pressure check:
   
2. 1. 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.
      

WIRING DIAGRAM

INSPECTION PROCEDURE

NOTICE:

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

HINT:

1. Using intelligent tester monitor results enables the EVAP (Evaporative Emission) 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.

5. Turn the ignition switch on and turn the tester on.

6. Select 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 reference pressure difference between the first and second checks is greater than the specification, the DTCs corresponding to the reference pressure (P043E, P043F, P0441, P0455, P0456, P2401 and P2420) will all be stored.

NEXT

NOTICE:

1. In the EVAP SYSTEM CHECK (AUTO OPERATION), the series of 5 EVAP SYSTEM CHECK steps is performed automatically by the intelligent tester. It takes a maximum of approximately 15 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 and making the leak check of the fuel tank unavailable.
   
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. Connect the intelligent tester to the DLC3.

2. Clear DTCs (Click here).

3. Select the following menu items on the tester: DIAGNOSIS / ENHANCED OBD II / SYSTEM CHECK / EVAP SYS CHECK / AUTO OPERATION.

4. After the EVAP SYSTEM CHECK is completed, check for pending DTCs by selecting the following menu items: DIAGNOSIS / ENHANCED OBD II / DTC INFO / PENDING CODES.

   HINT:

   If no pending DTC is displayed, perform the Monitor Confirmation after this repair is completed. 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 is 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 and making the leak check of the fuel tank unavailable.
   
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. Connect the intelligent tester to the DLC3.

2. Clear DTCs (Click here).

3. Select the following menu items: DIAGNOSIS / ENHANCED OBD II / SYSTEM CHECK / EVAP SYS CHECK / MANUAL OPERATION.

NEXT

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

   Result:

   
   

   DTCs*	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	Pressure sensor noising	B

   *: The DTCs relating to the EVAP system displayed on the intelligent tester when checking.
   

B	Go to step 30

A

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

   Result:

   
   

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

   *: The DTCs relating to the EVAP system are displayed on the intelligent tester when checking.
   

   HINT:

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

B	Go to step 23

A

HINT:

Make a note of the pressures checked steps (a) and (b) below.

1. Check the EVAP pressure 4 seconds after the vacuum pump is activated*1 (Step (a)).

2. Check the EVAP pressure again when it has stabilized. This pressure is the 0.02 inch leak pressure standard (Step (b)).
   *1: The vacuum pump begins to operate as step 1/5 is proceeded to step 2/5.
   

   Result:

   
   

   DTCs*2	Test Results	Suspected Trouble Areas	Proceed to
   -	EVAP pressure in step (b) is 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) is -1.06 kPa (-7.95 mmHg) or more	0.02 inch orifice high-flow Vacuum pump stuck OFF	B
   P043E	EVAP pressure in step (b) is below -4.85 kPa (-36.38 mmHg)	0.02 inch orifice clogged	C
   P2419	EVAP pressure in step (a) is more than -1.06 kPa (-7.95 mmHg)	Vent valve stuck closed	D

   *2: The DTCs related to the EVAP system displayed on the intelligent tester when checking.
   

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

A

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

   Result:

   
   

   DTCs*	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	Pressure sensor malfunction	C

   *: The DTCs relating to the EVAP system displayed on the intelligent tester when checking.
   

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.

NEXT

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

   Result:

   
   

   DTCs*	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 pure 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

   *: The DTCs relating to the EVAP system displayed on an intelligent tester when checking.
   

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 pressure standard (step 5/5).
   

   Result:

   
   

   DTCs*	Test Results	Suspected Trouble Areas	Proceed to
   -	EVAP pressure (step 3/5) lower than second 0.02 inch leak pressure standard (step 5/5)	Not yet determined (no leafage from EVAP system)	A
   P0441 and P0455	EVAP pressure (step 3/5) higher than [second 0.02 inch leak pressure standard (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 pressure standard (step 5/5)	EVAP small leak	C

   *: The DTCs relating to the EVAP system are displayed on the intelligent tester when checking.
   

A	Go to step 36
B	Go to step 12

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

   Result:

   
   

   DTCs*	Test Results	Suspected Trouble Areas	Proceed to
   P043F	EVAP pressure is less than [0.02 inch leak pressure standard] measured in step 2/5	0.02 inch orifice high-flow	A
   P2401	EVAP pressure is almost the same as [0.02 inch leak pressure standard] measure in step 2/5	Vacuum pump stuck OFF	B

   *: The DTCs related to the EVAP system are displayed on the intelligent tester when checking.
   

   HINT:

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

A	Go to step 30
B	Go to step 23

1. Select the following menu items on the tester: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / EVAP VSV (ALONE).

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

3. Start the engine.

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

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

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

7. Use you 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 throttle body	C

8. Reconnect the hose.

B	Go to step 14
C	Go to step 15

A

1. Check that the fuel tank cap is correctly installed and confirm the fuel tank cap meets OEM specification.

   HINT:

   If an EVAP tester is available, check the fuel tank cap using the tester.

   1. Tighten the fuel tank cap.

   2. Remove the fuel tank cap and install it onto a fuel tank 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 tank cap is normal.
      

      Result:

      
      

      Test Results	Suspected Trouble Areas	Proceed to
      Fuel tank cap correctly installed	-	A
      Fuel tank cap loose	Fuel tank cap improperly installed Defective fuel tank cap Fuel tank cap does not meet OEM specifications	B
      No fuel tank 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 B19 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.

7. Reconnect the hose.

A	Go to step 35
B	Go to step 31

1. Disconnect the hose (connected to the throttle body) 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 throttle body normal	A
No suction	Throttle body EVAP hose between purge VSV and throttle body	B

4. Reconnect the hose.

B	Go to step 26

A

1. Remove the purge VSV.

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

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

Result:

Test Results	Suspected Trouble Area	Proceed to
Air flowed	Purge VSV normal	A
No air flow	Purge VSV	B

4. Install the purge VSV.

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 E4 ECM connector and the V2 purge VSV connector.

2. Measure the resistance between the terminals of the purge VSV connector and ECM connector.

   Standard resistance:

   Tester Connections	Specified Conditions
   E4-34 (PRG) - V2-2	Below 1 Ω
   E4-34 (PRG) - Body ground	10 kΩ or higher
   V2-1 - Body ground	10 kΩ or higher

3. Reconnect the purge VSV connector.

4. Reconnect the ECM connector.

OK	Go to step 35
NG	Go to step 32

1. Turn the ignition switch on.

2. Select the following menu items on the tester: 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 (IG).

2. Select the following menu items on the tester: 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 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

5. Reconnect the canister connector.

B	Go to step 32

A

1. Turn the ignition switch to off.

2. Disconnect the L4 canister connector.

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

4. Touch the 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. Select the following menu items on the tester: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / VACUUM PUMP (ALONE).

2. Measure the voltage between terminal MPMP of the ECM connector and the body ground when the vacuum 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. Select the following menu items on the tester: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / VACUUM PUMP (ALONE).

5. Turn the vacuum 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 vacuum pump	B

7. Reconnect the canister connector.

B	Go to step 32

A

1. Disconnect the L4 canister connector.

2. Turn the ignition switch to off.

3. Check the resistance between terminal 6 of the canister connector and the body ground.

   Result:

   Test Results	Suspected Trouble Areas	Proceed to
   Below 1 Ω	Vacuum Pump	A
   10 kΩ or higher	Wire harness between vacuum pump and body ground	B

4. Reconnect the canister connector.

A	Go to step 30
B	Go to step 32

1. Stop the engine.

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 throttle body and purge VSV	A
No suction	Throttle body	B

5. Reconnect the EVAP hose.

A	Go to step 33
B	Go to step 34

HINT:

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

NEXT	Go to step 37

HINT:

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

NEXT	Go to step 37

1. Disconnect the vent hose.

   
   
   
   

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

   
   
   
   

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

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

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

6. Repair or replace the leak point.

NEXT	Go to step 37

NEXT	Go to step 37

1. Disconnect the connector and 2 hoses from the purge VSV.

2. Remove the purge VSV.

3. Install a new purge VSV.

4. Reconnect the connector and 2 hoses.

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 throttle body is not clogged. If necessary, replace the throttle body.

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

NOTICE:

1. In the EVAP SYSTEM CHECK (AUTO OPERATION), the series of 5 EVAP SYSTEM CHECK steps are performed automatically by the intelligent tester. It takes a maximum of approximately 15 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 and making the leak check of the fuel tank unavailable.
   
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. On the intelligent tester, select the following menu items: DIAGNOSIS / ENHANCED OBD II / SYSTEM CHECK / EVAP SYS CHECK / AUTO OPERATION.

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

   HINT:

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

NEXT
COMPLETED