EVAP System: Procedure

1. Turn the engine switch off and wait for 10 seconds.
2. Turn the engine switch on (IG).
3. Turn the engine switch off and wait for 10 seconds.
4. Connect the Techstream to the DLC3.
5. Turn the engine switch on (IG).
6. Turn the Techstream on.
7. Enter the following menus: Powertrain / Engine / Trouble Codes.
8. Confirm DTCs and freeze frame data.

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

   NOTE:

   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.

   Fig 1: DTC Malfunctioning Areas Chart

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NEXT: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Clear the DTCs. Refer to DTC CHECK / CLEAR .
5. Enter the following menus: Powertrain / Engine / Utility / Evaporative System Check / Automatic Mode.
6. After the Evaporative system check is completed, check for pending DTCs by entering the following menus: Powertrain / Engine / Trouble Codes.

   HINT: 

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

NEXT: Go to next step 

Fig 2: Identifying EVAP System Check (Manual Mode) Graph

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Clear the DTCs. Refer to DTC CHECK / CLEAR .
5. Enter the following menus: Powertrain / Engine / Utility / Evaporative System Check / Manual Mode.

NEXT: Go to next step 

Fig 3: Identifying Evaporative System Check (Step 1/5) Graph

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Result

   DTC*	Test Result	Suspected Trouble Area	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 signal noise	B

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

B → See step   29 

A: Go to next step 

Fig 4: Identifying Evaporative System Check (Step 1/5 To 2/5) Graph

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Result

   DTC*	Test Result	Suspected Trouble Area	Proceed to
   -	Virtually no variation in EVAP pressure during step 1/5. Then decreases to reference pressure	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 the "Confirm DTC" procedures above.

   HINT: 

   The first reference pressure is the value determined in step 2/5.

B → See step   22 

A: Go to next step 

Fig 5: View Of Performing Evaporative System Check (Step 2/5)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

HINT: 

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

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

  *: The leak detection pump begins to operate as step 1/5 finishes and step 2/5 starts.

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

  Result

  DTC*	Test Result	Suspected Trouble Area	Proceed to
  -	EVAP pressure in step (b) is between -4.85 kPa and -1.057 kPa (-36.4 mmHg and -7.93 mmHg)	Not yet determined	A
  P043F and P2401	EVAP pressure in step (b) is -1.057 kPa (-7.93 mmHg) or more	Reference orifice high-flow Leak detection pump stuck OFF	B
  P043E	EVAP pressure in step (b) is below -4.85 kPa (-36.4 mmHg)	Reference orifice clogged	C
  P2419	EVAP pressure in step (a) is more than -1.057 kPa (-7.93 mmHg)	Vent valve stuck closed	D

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

B → See step   11 

C → See step   29 

D → See step   20 

A: Go to next step 

Fig 6: View Of Performing Evaporative System Check (Step 2/5 To 3/5)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Result

   DTC*	Test Result	Suspected Trouble Area	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 output value stuck	C

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

B → See step   19 

C → See step   29 

A: Go to next step 

Fig 7: View Of Performing Evaporative System Check (Step 3/5)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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 only a small amount of fuel in the fuel tank, it takes up to 15 minutes.

NEXT: Go to next step 

Fig 8: EVAP System Chart - STEP 4/5

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Result

   DTC*	Test Result	Suspected Trouble Area	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 is 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 the step 1 "Confirm DTC".

B → See step   15 

C → See step   12 

A: Go to next step 

Fig 9: EVAP System Check Diagram -- Leak Detection

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Check the EVAP pressure in step 5/5.
2. Compare the EVAP pressure in step 3/5 and the second reference pressure (step 5/5).

   Result

   DTC*	Test Result	Suspected Trouble Area	Proceed to
   -	EVAP pressure from step 3/5 is lower than second reference pressure (step 5/5)	Not yet determined (no leakage from EVAP system)	A
   P0441 and P0455	EVAP pressure from step 3/5 is higher than [second reference pressure (step 5/5) x 0.2]	Purge VSV stuck open EVAP gross leak	B
   P0456	EVAP pressure from step 3/5 is higher than second reference pressure (step 5/5)	EVAP small leak	B

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

A → See step   35 

B → See step   12 

Fig 10: View Of Performing Evaporative System Check (Step 3/5)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Result

   DTC*	Test Result	Suspected Trouble Area	Proceed to
   P043F	EVAP pressure is less than [reference pressure] measured in step 2/5	Reference orifice high-flow	A
   P2401	EVAP pressure is almost the same as [reference pressure] measured in step 2/5	Leak detection pump stuck off	B

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

   HINT: 

   The first reference pressure is the value determined in step 2/5.

A → See step   29 

B → See step   22 

Fig 11: Identifying Hose & Canister

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Enter the following menus: Powertrain / Engine / Active Test / Activate the VSV for EVAP Control.
2. Disconnect the hose (connected to the canister) from the purge VSV.
   TEXT IN ILLUSTRATION
   
   

   *1	Purge VSV
   *2	Hose (to Canister)

3. Start the engine.
4. Using the Techstream, turn off the purge VSV (Activate the VSV for EVAP Control: OFF).
5. Use your finger to confirm that the purge VSV has no suction.
6. Using the Techstream, turn on the purge VSV (Activate the VSV for EVAP Control: ON).
7. Use your finger to confirm that the purge VSV has suction.

   Result

   Test Result	Suspected Trouble Area	Proceed to
   No suction when purge VSV turned off, and suction applied when turned on	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

8. Reconnect the hose.

B → See step   14 

C → See step   15 

A: Go to next step 

1. Check that the fuel cap is correctly installed and confirm that the fuel cap meets OEM specifications.
2. Tighten the fuel cap until a few click sounds are heard.

   HINT: 

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

   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 (24 to 28 mmHg) using the EVAP tester pump.
   3. Seal the adapter and wait for 2 minutes.
   4. Check the pressure. If the pressure is 2 kPa-g (15 mmHg-g) or more, the fuel cap is normal.

   Result

   Test Result	Suspected Trouble Area	Proceed to
   Fuel cap correctly installed	-	A
   Fuel cap loose	Fuel cap improperly installed Defective fuel cap Fuel cap does not meet OEM specifications	B
   No fuel cap	-	C

3. Reinstall the fuel cap.

A → See step   28 

B → See step   26 

C → See step   27 

Fig 12: Identifying Purge VSV

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Turn the engine switch off.
2. Disconnect the purge VSV connector.
   TEXT IN ILLUSTRATION
   
   

   *1	Hose (to Canister)
   *2	Connector
   *3	Purge VSV

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 Result	Suspected Trouble Area	Proceed to
   No suction	ECM	A
   Suction applied	Purge VSV	B

6. Reconnect the purge VSV connector.
7. Reconnect the hose.

A → See step   34 

B → See step   30 

Fig 13: Disconnecting Hose (Connected To Throttle Body) From EVAP VSV

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the hose (connected to the intake air surge tank assembly) from the purge VSV.
   TEXT IN ILLUSTRATION
   
   

   *1	Purge VSV
   *2	Hose (to Intake Air Surge Tank Assembly)

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

   Result

   Test Result	Suspected Trouble Area	Proceed to
   Suction applied	EVAP hose between purge VSV and intake air surge tank assembly normal	A
   No suction	Intake manifold port EVAP hose between purge VSV and intake air surge tank assembly	B

4. Reconnect the hose.

B → See step   25 

A: Go to next step 

Fig 14: View Of Purge VSV And Air Flow

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Remove the purge VSV.
2. Apply battery voltage to the terminals of the purge VSV.
   TEXT IN ILLUSTRATION
   
   

   *1

   Purge VSV

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

   Result

   Test Result	Condition	Suspected Trouble Area	Proceed to
   Air flows	Battery voltage is applied to purge VSV terminals	Purge VSV normal	A
   No air flow	Battery voltage is applied to purge VSV terminals	Purge VSV	B

4. Install the purge VSV.

B → See step   30 

A: Go to next step 

Fig 15: Purge VSV Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the purge VSV connector.
2. Turn the engine switch on (IG).
3. Measure the voltage according to the value(s) in the table below.
   TEXT IN ILLUSTRATION
   
   

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

   Result

   Tester Connection	Switch Condition	Specified Condition	Suspected Trouble Area	Proceed to
   E15-1 - Body ground	Engine switch on (IG)	11 to 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 → See step   31 

A: Go to next step 

1. Disconnect the ECM connector.
2. Disconnect the purge VSV connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance (Check for Open)

   Tester Connection	Condition	Specified Condition
   E15-2 - E3-11 (PRG)	Always	Below 1 Ω

   Standard Resistance (Check for Short)

   Tester Connection	Condition	Specified Condition
   E15-2 or E3-11 (PRG) - Body ground	Always	10 kΩ or higher

4. Reconnect the purge VSV connector.
5. Reconnect the ECM connector.

OK → See step   34 

NG → See step   31 

1. Disconnect the canister pump module connector.
   Fig 16: Canister Pump Module Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Turn the engine switch on (IG).
3. Measure the voltage according to the value(s) in the table below.

   Result

   Tester Connection	Switch Condition	Specified Condition	Suspected Trouble Area	Proceed to
   Q49-9 - Body ground	Engine switch on (IG)	11 to 14 V	Wire harness between vent valve and ECM Vent valve ECM	A
   		Below 3 V	Power source wire harness of vent valve	B

   TEXT IN ILLUSTRATION
   
   

   *a

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

   -

   -

4. Reconnect the canister pump module connector.

B → See step   31 

A: Go to next step 

Fig 17: Canister Pump Module Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the canister pump module connector.
2. Apply battery voltage to terminals 8 and 9 terminals of the canister pump module.
3. Touch the canister pump module to confirm the vent valve operation.
   TEXT IN ILLUSTRATION
   
   

   *a	Component without harness connected (Canister Pump Module)

   Result

   Condition	Test Result	Suspected Trouble Area	Proceed to
   Apply battery voltage to terminals 9 and 8	Operating	1. Wire harness between vent valve and ECM 2. ECM	A
   	Not operating	Vent valve	B

4. Reconnect the canister pump module connector.

B → See step   29 

A: Go to next step 

1. Disconnect the ECM connector.
2. Disconnect the canister pump module connector.
3. Measure the resistance according to the value(s) in the table below.

   Result

   Tester Connection	Condition	Test Result	Suspected Trouble Area	Proceed to
   A6-12 (VPMP) - Q49-8	Always	Below 1 Ω	ECM	A
   		10 kΩ or higher	Wire harness between ECM and canister pump module	B

4. Reconnect the ECM connector.
5. Reconnect the canister pump module connector.

A → See step   34 

B → See step   31 

1. Turn the engine switch off.
   Fig 18: Canister Pump Module Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the canister pump module connector.
3. Turn the engine switch on (IG).
4. Enter the following menus: Powertrain / Engine / Active Test / Activate the Vacuum Pump.
5. Measure the voltage according to the value(s) in the table below.

   Result

   Tester Connection	Condition	Test Result	Suspected Trouble Area	Proceed to
   Q49-1 - Body ground	Leak detection pump on and off (Active Test ON and OFF)	Below 3 V when OFF 11 to 14 V when ON	Wire harness between leak detection pump and body ground Leak detection pump	A
   		Below 3 V when OFF and ON	Wire harness between leak detection pump and ECM ECM	B
   		11 to 14 V when OFF and ON	ECM	C

   TEXT IN ILLUSTRATION
   
   

   *a

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

   -

   -

6. Reconnect the canister pump module connector.

B → See step   24 

C → See step   34 

A: Go to next step 

1. Disconnect the canister pump module connector.
2. Measure the resistance according to the value(s) in the table below.

   Result

   Tester Connection	Condition	Specified Condition	Suspected Trouble Area	Proceed to
   Q49-6 - Body ground	Always	Below 1 Ω	Leak detection pump	A
   		10 kΩ or higher	Wire harness between canister pump module and body ground	B

3. Reconnect the canister pump module connector.

A → See step   29 

B → See step   31 

1. Disconnect the canister pump module connector.
2. Disconnect the ECM connector.
3. Measure the resistance according to the value(s) in the table below.

   Result

   Tester Connection	Condition	Test Result	Suspected Trouble Area	Proceed to
   A6-5 (MPMP) - Q49-1	Always	Below 1 Ω	ECM	A
   		10 kΩ or higher	Wire harness between ECM and canister pump module	B

4. Reconnect the canister pump module connector.
5. Reconnect the ECM connector.

A → See step   34 

B → See step   31 

1. Disconnect the EVAP hose from the intake air surge tank assembly.
2. Start the engine.
3. Use your finger to confirm that the port of the intake air surge tank assembly has suction.

   Result

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

4. Reconnect the EVAP hose.

A → See step   32 

B → See step   33 

HINT: 

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

NEXT → See step   36 

HINT: 

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

NEXT → See step   36 

1. Disconnect the vent hose.
   Fig 19: Identifying EVAP Leak Part

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   TEXT IN ILLUSTRATION
   
   

   *1	Fuel Tank	*2	Canister
   *3	Air Filter	*4	Disconnect the vent hose here

2. Connect the EVAP pressure tester tool to the canister pump module with the adapter.
   Fig 20: Connecting EVAP Pressure Tester Tool To Canister Pump Module

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   TEXT IN ILLUSTRATION
   
   

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

3. Pressurize the EVAP system to 3.2 to 3.7 kPa (24 to 28 mmHg).
4. Apply soapy water to the piping and connecting parts of the EVAP system.
5. Look for areas where bubbles appear. This indicates the leak point.
6. Repair or replace the leak point.

   HINT: 

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

NEXT → See step   36 

1. Replace the canister assembly. Refer to REMOVAL .
   NOTE:

   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.

   Fig 21: Identifying Canister

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   TEXT IN ILLUSTRATION
   
   

   *1	Fuel Tank Vent Hose	*2	Vent Hose
   *3	Air Inlet Port	*4	Inspection Area (check for disconnection and/or cracks)
   *5	Canister Filter	*6	Fuel Tank

NEXT → See step   36 

1. Replace the purge VSV. Refer to REMOVAL .

NEXT → See step   36 

NEXT → See step   36 

NEXT → See step   36 

1. Check that the EVAP purge port of the intake air surge tank assembly is not clogged. If necessary, replace the intake air surge tank assembly.

NEXT → See step   36 

1. Replace the ECM. Refer to REMOVAL .

NEXT → See step   36 

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

NEXT: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Clear the DTCs. Refer to DTC CHECK / CLEAR .
5. Enter the following menus: Powertrain / Engine / Utility / Evaporative System Check / Automatic Mode.
6. After the Evaporative System Check is completed, check for pending DTCs by entering the following menus: Powertrain / Engine / Trouble Codes / Pending.

   HINT: 

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

NEXT → COMPLETED