Toyota Tundra. Manual — part 1265

Fig. 252: Identifying R1 Canister Pump Module Connector Terminals

Result

RESULT CHART

B : Go to step 24

A : Go to next step.

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

a. Turn the ignition switch OFF.

Test Result

Suspected Trouble Area

Proceed
To

Below 3 V when OFF
11 to 14 V when ON

1. Wire harness between leak detection pump and body

ground

2. Leak detection pump

A

Below 3 V when OFF and
ON

1. Wire harness between leak detection pump and

ECM

2. ECM

B

2008 Toyota Tundra

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

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. 253: Identifying R1 Canister Pump Module Connector Terminals

Result

RESULT CHART

A : Go to step 29

B : Go to step 31

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

a. Turn the ignition switch OFF.

b. Disconnect the A24 ECM connector.

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 (1GR-FE) - Tundra

c. Disconnect the R1 canister pump module connector.

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

canister pump module connector.

Fig. 254: Identifying A24 ECM Connector & R1 Canister Pump Module Connector
Terminals

Result

RESULT CHART

A : Go to step 34

B : Go to step 31

25. INSPECT INTAKE MANIFOLD (EVAP PURGE PORT)

a. Stop the engine.

b. Disconnect the EVAP hose from the intake manifold.

c. Start the engine.

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

Result

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 (1GR-FE) - Tundra

RESULT CHART

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 EVAP hose between intake manifold and purge VSV

A

No suction

Intake manifold

B

2008 Toyota Tundra

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