Toyota Tundra. Manual — part 1446

23. CHECK HARNESS AND CONNECTOR (CANISTER PUMP MODULE - BODY GROUND)

a. Turn the ignition switch off.

b. Disconnect the R1 canister pump module connector.

c. Check the resistance between the MGND terminal of the canister pump module connector and the

body ground.

Fig. 272: Identifying R1 Canister Pump Module Connector

Result

RESULT REFERENCE

A : Go to step 29

B : Go to step 31

24. CHECK HARNESS AND CONNECTOR (ECM - CANISTER PUMP MODULE)

Test Result

Suspected Trouble Area

Proceed To

Below 1 ohms

Leak detection pump

A

10 kohms or higher Wire harness between canister pump module and body ground

B

2008 Toyota Tundra

2008 ENGINE PERFORMANCE Engine Control System (2UZ-FE) - Tundra

a. Turn the ignition switch off.

b. Disconnect the R1 canister pump module connector.

c. Disconnect the A24 ECM connector.

d. Measure the resistance between MPMP terminal of the ECM connector and MTRB terminal of the

canister pump module connector.

Fig. 273: Identifying A24 ECM & R1 Canister Pump Module Connector

Result

RESULT REFERENCE

A : Go to step 34

B : Go to step 31

25. INSPECT INTAKE MANIFOLD (EVAP PURGE PORT)

a. Stop the engine.

b. Disconnect the purge line from the intake manifold.

c. Start the engine.

d. Use your finger to confirm that the port of the intake manifold has suction.

Test Result

Suspected Trouble Area

Proceed To

Below 1 ohms

ECM

A

10 kohms or higher Wire harness between ECM and canister pump module

B

2008 Toyota Tundra

2008 ENGINE PERFORMANCE Engine Control System (2UZ-FE) - Tundra

Result

RESULT REFERENCE

e. Reconnect the purge line.

A : Go to step 32

B : Go to step 33

26. CORRECTLY REINSTALL OR REPLACE FUEL TANK CAP

HINT:



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



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 36

27. REPLACE FUEL TANK CAP

HINT:

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

NEXT : Go to step 36

28. LOCATE EVAP LEAK PART

Test Result

Suspected Trouble Area

Proceed To

Suction applied Purge line between intake manifold and purge VSV

A

No suction

Intake manifold

B

2008 Toyota Tundra

2008 ENGINE PERFORMANCE Engine Control System (2UZ-FE) - Tundra

Fig. 274: Connecting EVAP Tester To Canister Pump Module With Adapter

a. Disconnect the vent hose.

b. Connect an EVAP tester to the canister pump module with the adapter.

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

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

e. Look for areas where bubbles appear. This indicates the leak point.

f. 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 36

29. REPLACE CANISTER ASSEMBLY

a. Replace the canister assembly. (See CANISTER ).

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.

2008 Toyota Tundra

2008 ENGINE PERFORMANCE Engine Control System (2UZ-FE) - Tundra