Toyota Tundra. Manual — part 1263

a. Check that the fuel cap is correctly installed and confirm the fuel cap meets OEM specifications.

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

HINT:

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

1. Remove the fuel cap and install it onto a fuel cap adapter.

2. Connect an EVAP tester pump hose to the adapter, and pressurize the cap to 3.2 to 3.7 kPa

(24 to 28 mmHg) using an EVAP tester pump.

3. Seal the adapter 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

RESULT CHART

A : Go to step 28

B : Go to step 26

C : Go to step 27

14. INSPECT PURGE VSV

a. Turn the ignition switch OFF.

b. Disconnect the D30 purge VSV connector.

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

d. Start the engine.

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

Test Result

Suspected Trouble Area

Proceed To

Fuel cap correctly installed

-

A

Fuel cap loose



Fuel cap improperly installed



Defective fuel cap



Fuel cap does not meet OEM specifications

B

Defective fuel cap

-

B

No fuel cap

-

C

2008 Toyota Tundra

2008 ENGINE PERFORMANCE Engine Control System (1GR-FE) - Tundra

Fig. 244: Locating Purge VSV Connector

Result

RESULT CHART

A : Go to step 34

B : Go to step 30

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

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

b. Start the engine.

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

Fig. 245: Locating Purge VSV Connector & Hose

Result

RESULT CHART

Test Result Suspected Trouble Area Proceed To

No suction

ECM

A

Suction applied Purge VSV

B

Test Result

Suspected Trouble Area

Proceed To

Suction applied EVAP hose between purge VSV and intake manifold normal

A

2008 Toyota Tundra

2008 ENGINE PERFORMANCE Engine Control System (1GR-FE) - Tundra

B : Go to step 25

A : Go to next step.

16. INSPECT PURGE VSV

a. Remove the purge VSV.

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

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

Fig. 246: Inspecting Purge VSV

Result

RESULT CHART

B : Go to step 30

A : Go to next step.

17. CHECK HARNESS AND CONNECTOR (POWER SOURCE OF PURGE VSV)

a. Disconnect the D30 purge VSV connector.

b. Turn the ignition switch ON.

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

No suction



Intake manifold port



EVAP hose between purge VSV and intake manifold

B

Test Result Suspected Trouble Area Proceed To
Air flows

-

A

No air flow Purge VSV

B

2008 Toyota Tundra

2008 ENGINE PERFORMANCE Engine Control System (1GR-FE) - Tundra

Fig. 247: Identifying D30 Purge VSV Connector Terminals

Result

RESULT CHART

B : Go to step 31

A : Go to next step.

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

a. Disconnect the D74 ECM connector.

b. Disconnect the D30 purge VSV connector.

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

Standard resistance (Check for open)

TESTER CONNECTION SPECIFIED CONDITION

Standard resistance (Check for short)

TESTER CONNECTION SPECIFIED CONDITION

OK : Go to step 34

NG : Go to step 31

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

Tester Connection

Condition Specified Condition

D74-63 (PRG) - D30-2 Always

Below 1 ohms

Tester Connection

Condition Specified Condition

D74-63 (PRG) - Body ground Always

10 kohms or higher

D30-2 - Body ground

Always

10 kohms or higher

2008 Toyota Tundra

2008 ENGINE PERFORMANCE Engine Control System (1GR-FE) - Tundra