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) and turn the Techstream on.
6. Enter the following menus: Powertrain / Engine / Trouble 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.

   Fig 1: DTC Malfunctioning Areas Chart

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   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.

NEXT: Go to next step 

1. Clear DTCs. Refer to DTC CHECK / CLEAR .
2. Enter the following menus: Powertrain / Engine / Utility / Evaporative System Check / Automatic Mode.
3. 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 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 Evaporative System Pressure Check (Manual Mode)

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1. Clear DTCs. Refer to DTC CHECK / CLEAR .
2. Enter the following menus: Powertrain / Engine / Utility / Evaporative System Check / Manual Mode.

NEXT: Go to next step 

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

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

   Result

   DTCs*	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-g (2.25 mmHg-g) or more	Canister pressure sensor 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   30 

A: Go to next step 

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

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

   Result

   DTCs*	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   23 

A: Go to next step 

Fig 5: Checking EVAP System (Step 2/5)

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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

*: 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   30 

D → See step   19 

A: Go to next step 

Fig 6: EVAP Pressure Graph (Step 2/5 To 3/5)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Result

   DTCs*	Test Result	Suspected Trouble Area	Proceed to
   -	EVAP pressure increases by 0.3 kPa-g (2.25 mmHg-g) 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 fixed	C

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

B → See step   20 

C → See step   30 

A: Go to next step 

Fig 7: EVAP Pressure Graph (Step 3/5)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Wait until the EVAP pressure change is less than 0.1 kPa-g (0.75 mmHg-g) 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: Go to next step 

Fig 8: Driving Pattern - EVAPORATIVE System (Step 4/5)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Result

   DTCs*	Test Result	Suspected Trouble Area	Proceed to
   -	EVAP pressure increases by 0.3 kPa-g (2.25 mmHg-g) 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-g (2.25 mmHg-g) 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-g (2.25 mmHg-g) 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 "CONFIRM DTC" procedures above.

B → See step   15 

C → See step   12 

A: Go to next step 

Fig 9: Driving Pattern - EVAPORATIVE System (Step 5/5)

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

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

A → See step   36 

B → See step   12 

Fig 10: EVAP Pressure Graph (Step 3/5)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Result

   DTCs*	Test Result	Suspected Trouble Area	Proceed to
   P043F	EVAP pressure less than [reference pressure] measured at 2/5	Reference orifice high-flow	A
   P2401	EVAP pressure almost same as [reference pressure] 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 the "CONFIRM DTC" procedures above.

   HINT: 

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

A → See step   30 

B → See step   23 

Fig 11: Identifying Purge VSV And Hose (To 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.
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 air surge tank	C

B → See step   14 

C → See step   15 

A: Go to next step 

1. Check that the fuel cap is correctly installed and confirm the fuel cap meets OEM specifications.
2. Confirm that the fuel cap is tightened 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 adaptor.
   2. 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.
   3. Seal the adaptor and wait for 2 minutes.
   4. Check the pressure. If the pressure is 2 kPa (15 mmHg) 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

A → See step   29 

B → See step   27 

C → See step   28 

Fig 12: Disconnecting Hose (Connected To Canister) From Purge VSV

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Turn the engine switch off.
2. Disconnect the E44 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 Result	Suspected Trouble Area	Proceed to
   No suction	ECM	A
   Suction applied	Purge VSV	B

A → See step   35 

B → See step   31 

Fig 13: Identifying Purge VSV And Hose (To Intake Manifold)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

B → See step   26 

A: Go to next step 

Fig 14: Applying Battery Voltage To Terminals Of Purge VSV

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Remove the purge VSV.
2. Apply the 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 Result	Suspected Trouble Area	Proceed to
   Air flows	Purge VSV normal	A
   No air flow	Purge VSV	B

B → See step   31 

A: Go to next step 

Fig 15: Identifying E44 Purge VSV Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the E44 purge VSV connector.
2. Turn the engine switch on (IG).
3. Measure the voltage between terminal 2 of the purge VSV connector and the body ground.

   Result

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

B → See step   32 

A: Go to next step 

Fig 16: Identifying ECM Connector And E44 Purge VSV Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the E44 purge VSV connector.
2. Disconnect the E1 ECM connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard resistance (Check for open)

   Tester Connection	Condition	Specified Condition
   E44-1 - E1-17 (PRG)	Always	Below 1 Ω

   Standard resistance (Check for short)

   Tester Connection	Condition	Specified Condition
   E1-17 (PRG) - Body ground	Always	10 kΩ or higher
   E44-1 - Body ground	Always	10 kΩ or higher

OK → See step   35 

NG → See step   32 

Fig 17: Identifying E1 ECM Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG) and turn the Techstream on.
3. Enter the following menus: Powertrain / Engine / Active Test / Activate the VSV for Vent Valve.
4. Measure the voltage between terminal VPMP of the ECM connector and the body ground when the vent valve is turned ON (closed) and OFF (vent) using the Techstream.

   Result

   Test Result	Suspected Trouble Area	Proceed to
   11 to 14 V when OFF Below 3 V when ON	Vent valve	A
   Below 3 V when OFF and ON	ECM	B

A → See step   22 

B → See step   35 

Fig 18: Identifying E1 ECM Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG) and turn the Techstream on.
3. Enter the following menus: Powertrain / Engine / Active Test / Activate the VSV for Vent Valve.
4. Measure the voltage between terminal VPMP of the ECM connector and the body ground when the vent valve is turned ON (closed) and OFF (vent) using the Techstream.

   Result

   Test Result	Suspected Trouble Area	Proceed to
   Below 3 V when OFF and ON	Power source of vent valve	A
   11 to 14 V when OFF Below 3 V when ON	Vent valve	B
   11 to 14 V when OFF and ON	ECM	C

B → See step   22 

C → See step   35 

A: Go to next step 

Fig 19: Inspecting Canister Pump Module (Power Source For Vent Valve)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Turn the engine switch off.
2. Disconnect the V1 canister connector.
3. Turn the engine switch on (IG).
4. Measure the voltage between VLVB terminal of the canister pump module connector and the body ground.

   Result

   Test Result	Suspected Trouble Area	Proceed to
   11 to 14 V	Normal	A
   Below 3 V	Power source wire harness of vent valve	B

B → See step   32 

A: Go to next step 

Fig 20: Identifying Canister Pump Module Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Turn the engine switch off.
2. Disconnect the V1 canister pump module connector.
3. Apply the battery voltage to VLVB and VGND terminals of the canister pump module.
4. Touch the canister pump module to confirm the vent valve operation.

   Result

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

A → See step   32 

B → See step   30 

Fig 21: Identifying MPMP Of ECM Connector Terminal

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG) and turn the Techstream on.
3. Enter the following menus: Powertrain / Engine / Active Test / Activate the Vacuum Pump.
4. Measure the voltage between terminal MPMP of the ECM connector and the body ground when the leak detection pump is turned ON and OFF using the Techstream.

   Result

   Test Result	Suspected Trouble Area	Proceed to
   Below 3 V when OFF 11 to 14 V when ON	ECM normal	A
   11 to 14 V when OFF Below 3 V when ON	ECM	B

B → See step   35 

A: Go to next step 

Fig 22: Identifying Canister Pump Module Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Connect the Techstream to the DLC3.
2. Turn the engine switch off.
3. Disconnect the V1 canister pump module connector.
4. Turn the engine switch on (IG) and turn the Techstream on.
5. Enter the following menus: Powertrain / Engine / Active Test / Activate the Vacuum Pump.
6. Turn the leak detection pump ON.
7. Measure the voltage between MTRB terminal of the canister pump module connector and the body ground.

   Result

   Test Result	Suspected Trouble Area	Proceed to
   11 to 14 V	Normal	A
   Below 3 V	Wire harness between ECM and leak detection pump	B

B → See step   32 

A: Go to next step 

Fig 23: Identifying Canister Pump Module Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the V1 canister pump module connector.
2. Turn the engine switch off.
3. Measure the resistance between MGND terminal of the canister pump module connector and the body ground.

   Result

   Test Result	Suspected Trouble Area	Proceed to
   Below 1 Ω	Leak detection pump	A
   10 kΩ or more	Wire harness between leak detection pump and body ground	B

A → See step   30 

B → See step   32 

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

   Result

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

A → See step   33 

B → See step   34 

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   37 

HINT: 

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

NEXT → See step   37 

Fig 24: Connecting EVAP Pressure Tester Tool To Canister With Adapter

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the vent hose.
2. Connect the EVAP pressure tester tool to the canister with the adapter.
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 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 → See step   37 

1. Replace the canister assembly. Refer to REMOVAL .
   Fig 25: Identifying Canister Assembly Inspection Area

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   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.

NEXT → See step   37 

Fig 26: Identifying Purge VSV

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the connector and the hoses from the purge VSV.
2. Remove the purge VSV.
3. Install a new purge VSV.
4. Reconnect the connector and hoses.

NEXT → See step   37 

NEXT → See step   37 

NEXT → See step   37 

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

NEXT → See step   37 

1. Replace the ECM. Refer to REMOVAL .

NEXT → See step   37 

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

NEXT → See step   37 

1. Clear DTCs. Refer to DTC CHECK / CLEAR .
2. Enter the following menus: Powertrain / Engine / Utility / Evaporative System Check / Automatic Mode.
3. 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