Toyota Tundra. Manual — part 1629

Fig. 268: EVAP Pressure In Step 1/5
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

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

Result

TEST RESULT

B: Go to step 29

A: Go to Next Step

5. PERFORM EVAP SYSTEM CHECK (STEP 1/5 TO 2/5)

Fig. 269: EVAP Pressure In Steps 1/5 And 2/5
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

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

DTCs

(1)

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

(1)

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

2009 Toyota Tundra

2009 ENGINE PERFORMANCE Engine Control System (3UR-FBE) - Tundra

Saturday, June 19, 2010 7:34:47 PM

Page 609

© 2006 Mitchell Repair Information Company, LLC.

Result

TEST RESULT

HINT:

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

B: Go to step 22

A: Go to Next Step

6. PERFORM EVAP SYSTEM CHECK (STEP 2/5)

Fig. 270: EVAP Pressure In Step 2/5
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

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

DTCs

(1)

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

(1)

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

2009 Toyota Tundra

2009 ENGINE PERFORMANCE Engine Control System (3UR-FBE) - Tundra

Saturday, June 19, 2010 7:34:47 PM

Page 610

© 2006 Mitchell Repair Information Company, LLC.

TEST RESULT

B: Go to step 11

C: Go to step 29

D: Go to step 20

A: Go to Next Step

7. PERFORM EVAP SYSTEM CHECK (STEP 2/5 TO 3/5)

Fig. 271: EVAP Pressure In Steps 2/5 And 3/5
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

DTCs

(1)

Test Result

Suspected Trouble Area

Proceed

to

-

EVAP pressure in step (b) between -4.85 kPa-g
and -1.057 kPa-g (-36.4 mmHg-g and -7.93
mmHg-g)

Not yet determined

A

P043F and

P2401

EVAP pressure in step (b) -1.057 kPa-g (-7.93
mmHg-g) or more



Reference orifice
high-flow



Leak detection
pump stuck OFF

B

P043E

EVAP pressure in step (b) below -4.85 kPa-g (-
36.4 mmHg-g)

Reference orifice clogged

C

P2419

EVAP pressure in step (a) more than -1.057 kPa-
g (-7.93 mmHg-g)

Vent valve stuck closed

D

(1)

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

2009 Toyota Tundra

2009 ENGINE PERFORMANCE Engine Control System (3UR-FBE) - Tundra

Saturday, June 19, 2010 7:34:47 PM

Page 611

© 2006 Mitchell Repair Information Company, LLC.

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

Result

TEST RESULT

B: Go to step 19

C: Go to step 29

A: Go to Next Step

8. PERFORM EVAP SYSTEM CHECK (STEP 3/5)

Fig. 272: EVAP Pressure In Step 3/5
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

a. Wait until the EVAP pressure change is less than 0.1 kPa-g (0.75 mmHg-g) for 30 seconds.

b. 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.

DTCs

(1)

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
output value stuck

C

(1)

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

2009 Toyota Tundra

2009 ENGINE PERFORMANCE Engine Control System (3UR-FBE) - Tundra

Saturday, June 19, 2010 7:34:47 PM

Page 612

© 2006 Mitchell Repair Information Company, LLC.