TOYOTA HIGHLANDER 2001 Service Repair Manual
Page 1421 of 2572
0.02 inch orifice clogged
Pressure sensor low outputP043E
P043FP0441 P0451 P0452 P0453 P0455 P0456 P2419P2401
P2402
0.02 inch orifice high-flow
Pressure sensor stuck
Pressure sensor noise
Gross leak
Small leak
Vacuum pump stuck OFF
Vacuum pump stuck ON
Vent valve stuck closed
Vent valve stuck open (vent) Purge VSV stuck open
Purge VSV stuck closed
Pressure sensor high output
DTCs
Malfunctioning AreasP2420 P0450
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
05-323
513 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
INSPECTION PROCEDURE
NOTICE:
A hand-held tester is required to conduct the following diagnostic troubleshooting procedure.
HINT:
Using hand-held tester monitor results enables the EVAP (Evaporative Emission) system to be con-
firmed.
Read freeze frame data using a hand-held tester Freeze frame data record the engine condition when
malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle
was moving or stationary, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and
other data, from the time the malfunction occurred.
1 CONFIRM DTC
(a) Turn the ignition switch OFF and wait 10 seconds.
(b) Turn the ignition switch ON.
(c) Turn the ignition switch OFF and wait 10 seconds.
(d) Connect the hand-held tester to the DLC3.
(e) Turn the ignition switch ON and press the hand-held tester switch ON.
(f) Enter the following menus: DIAGNOSIS/ ENHANCED OBD II/ DTC INFO/ CURRENT CODES.
(g) Confirm the DTCs and freeze frame data.
If any EVAP system DTCs are set, the malfunctioning area can be determined using the table below.
NOTICE:
If the 0.02 inch reference pressure difference between the first and second checks is greater than
the specification, the DTCs corresponding to the reference pressure (P043E, P043F, P0441, P0455,
P0456, P2401, P2420) will be all stored.
NEXT
Page 1422 of 2572
05-324
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
514 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
2 PERFORM EVAP SYSTEM CHECK(AUTO OPERATION)
NOTICE:
In the EVAP SYSTEM CHECK (AUTO OPERATION), the series of 5 EVAP SYSTEM CHECK steps
is performed automatically. It takes a maximum of approximately 18 minutes.
Do not perform the EVAP SYSTEM CHECK when the fuel tank is more than 90% full because
the cut-off valve may be closed and making the leak check of the fuel tank unavailable.
Do not run the engine in this step.
When the temperature of the fuel is 35C (95F) or more, a large amount of vapor forms and any
check results become inaccurate. When performing the EVAP SYSTEM CHECK, keep the tem-
perature below 35C
(95F).
(a) Clear DTCs (see page 05-38).
(b) On the hand-held tester, select the following menu items: DIAGNOSIS / ENHANCED OBD II / SYS-
TEM CHECK / EVAP SYS CHECK / AUTO OPERATION.
(c) After the EVAP SYSTEM CHECK is completed, check for pending DTCs by selecting the following
menu items: DIAGNOSIS / ENHANCED OBD II / DTC INFO / PENDING CODES.
HINT:
If no pending DTC is displayed, perform the Monitor Confirmation after this repair is completed. After this
confirmation, check for pending DTCs. If no DTC is displayed, the EVAP system is normal.
NEXT
Page 1423 of 2572
G36782
Purge VSV
Vent Valve
Vacuum Pump
EVAP Pressure
Positive
Leak PressureON: Open
NegativeONON
Steps
(Reference)60 Within 15 minutes 10 60ON
First 0.02 inch
2/5 3/5 4/55/5
OFF: Closed
OFF: Vent ON: Closed
EVAP SYSTEM CHECK
sec sec sec
Normal Pressure
10
sec
1/5
Gross Leak
No Leak Small Leak
TimeLeak Pressure
Second 0.02 inch
StandardStandard x 0.2
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
05-325
515 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
3 PERFORM EVAP SYSTEM CHECK(MANUAL OPERATION)
NOTICE:
In the EVAP SYSTEM CHECK (MANUAL OPERATION), the series of 5 EVAP SYSTEM CHECK
steps is performed manually.
Do not perform the EVAP SYSTEM CHECK when the fuel tank is more than 90% full because
the cut-off valve may be closed and making the leak check of the fuel tank unavailable.
Do not run the engine in this step.
When the temperature of the fuel is 35C (95F) or more, a large amount of vapor forms and any
check results become inaccurate. When performing the EVAP SYSTEM CHECK, keep the tem-
perature below 35C
(95F).
(a) Clear DTCs (see page 05-38).
(b) On the hand-held tester, select the following menu items: DIAGNOSIS / ENHANCED OBD II / SYS-
TEM CHECK / EVAP SYS CHECK / MANUAL OPERATION.
NEXT
Page 1424 of 2572
G36783
Purge VSV
Vent Valve
Vacuum Pump
EVAP Pressure
Positive
ON: Open
NegativeONON
Steps
(Reference)
ON
OFF: Closed
OFF: Vent ON: Closed
10
sec
1/5
Time
Pressure Sensor Noising
OK
Leak Pressure First 0.02 inch
Standard
05-326
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
516 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
4 PERFORM EVAP SYSTEM CHECK(STEP 1/5)
(a) Check the EVAP pressure in step 1/5.
Result:
DTCs*Test ResultsSuspected Trouble AreasProceed To
'Virtually no variation in EVAP pressureNot yet determinedA
P0451EVAP pressure fluctuates by 0.3 kPa
(2.25 mmHg) or morePressure sensor noisingB
*: The DTCs relating to the EVAP system displayed on a hand-held tester when checking.
B Go to step 30
A
Page 1425 of 2572
G36784
Purge VSV
Vent Valve
Vacuum Pump
EVAP Pressure
Positive
ON: Open
NegativeONON
Steps
(Reference)
ON
OFF: Closed
OFF: Vent ON: Closed
10
sec
1/5
Time
Vacuum Pump Stuck ON
60
sec
2/5
Leak Pressure First 0.02 inch
Standard
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
05-327
517 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
5 PERFORM EVAP SYSTEM CHECK(STEP 1/5 TO 2/5)
(a) Check the EVAP pressure in step 1/5 and 2/5.
Result:
DTCs*Test ResultsSuspected Trouble AreasProceed To
'
Virtually no variation in EVAP pressure during step
1/5. Then decreases to 0.02 inch leak pressure
standard*
Not yet determinedA
P2402Small difference between EVAP pressures during
steps 1/5 and 2/5Vacuum pump stuck ONB
*: The DTCs relating to the EVAP system displayed on a hand-held tester when checking.
HINT:
The first 0.02 inch leak pressure standard is the value determined in step 2/5.
B Go to step 23
A
Page 1426 of 2572
G36785
ON
Within 15 minutes
2/5
0.02 inch Orifice High-flow
Vent Valve Stuck closed
OK
0.02 inch Orifice Clogged
60
sec
3/5
4 sec
Vacuum Pump Stuck OFF
ONON
Purge VSV
Vent Valve
Vacuum Pump
EVAP Pressure
Positive
Negative
Steps
(Reference)TimeON: Open
OFF: Closed
OFF: Vent ON: Closed
Leak Pressure First 0.02 inch
Standard
05-328
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
518 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
6 PERFORM EVAP SYSTEM CHECK(STEP 2/5)
HINT:
Make a note of the pressures checked in steps (a) and (b) below.
(a) Check the EVAP pressure 4 seconds after the vacuum pump is activated*.
(b) Check the EVAP pressure again when it has stabilized. This pressure is the 0.02 inch leak pressure
standard.
*: The vacuum pump begins to operate as step 1/5 is proceeded to step 2/5.
Result:
DTCs*Test ResultsSuspected Trouble AreasProceed To
'EVAP pressure in step (b) between -4.85 kPa
and -1.06 kPa (-36.38 mmHg and -7.95 mmHg)Not yet determinedA
P043F and P2401EVAP pressure in step (b) -1.06 kPa (-7.95
mmHg) or more0.02 inch orifice high-flow
Vacuum pump stuck OFFB
P043EEVAP pressure in step (b) below -4.85 kPa
(-36.38 mmHg)0.02 inch orifice cloggedC
P2419EVAP pressure in step (a) more than -1.06 kPa
(-7.95 mmHg)Vent valve stuck closedD
*: The DTCs relating to the EVAP system displayed on a hand-held tester when checking.
B Go to step 11
C Go to step 30
D Go to step 19
A
Page 1427 of 2572
G36786
ON
Within 15 minutes
2/5
Vent Valve Stuck open (vent)
3/5
ONON
Purge VSV
Vent Valve
Vacuum Pump
EVAP Pressure
Positive
Negative
Steps
(Reference)TimeON: Open
OFF: Closed
OFF: Vent ON: Closed
Leak Pressure First 0.02 inch
Standard
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
05-329
519 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
7 PERFORM EVAP SYSTEM CHECK(STEP 2/5 TO 3/5)
(a) Check the EVAP pressure increase in step 3/5.
Result:
DTCs*Test ResultsSuspected Trouble AreasProceed To
'
EVAP pressure increases by 0.3 kPa (2.25 mmHg)
or more within 10 seconds of proceeding from step
2/5 to step 3/5
Not yet determinedA
P2420No variation in EVAP pressure despite proceeding
from step 2/5 to step 3/5Vent valve stuck open (vent)B
P0451No variation in EVAP pressure during steps 1/5
through 3/5Pressure sensor malfunction stuckC
*: The DTCs relating to the EVAP system displayed on a hand-held tester when checking.
B Go to step 20
C Go to step 30
A
Page 1428 of 2572
G38126
Purge VSV
Vent Valve
Vacuum Pump
EVAP Pressure
Positive
Leak PressureON: Open
NegativeONON
Steps
(Reference)Within 15 minutesON
First 0.02 inch
3/5
OFF: Closed
OFF: Vent ON: Closed
Time Standard
05-330
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
520 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
8 PERFORM EVAP SYSTEM CHECK(STEP 3/5)
(a) Wait until the EVAP pressure change is less than 0.1 kPa (0.75 mmHg) 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.
NEXT
Page 1429 of 2572
G36776
ON
Puge VSV Stuck Closed
4/5
ONON
Purge VSV
Vent Valve
Vacuum Pump
EVAP Pressure
Positive
Negative
Steps
(Reference)TimeON: Open
OFF: Closed
OFF: Vent ON: Closed
OK
10
sec
Leak Pressure First 0.02 inch
Standard
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
05-331
521 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
9 PERFORM EVAP SYSTEM CHECK(STEP 4/5)
(a) Check the EVAP pressure in step 4/5.
DTCs*Test ResultsSuspected Trouble AreasProceed To
'
EVAP pressure increases by 0.3 kPa (2.25 mmHg)
or more within 10 seconds of proceeding from step
3/5 to step 4/5
Not yet determinedA
P0441
EVAP pressure increases by 0.3 kPa (2.25 mmHg)
or more within 10 seconds of proceeding from step
3/5 to step 4/5Problems in EVAP hose between pure VSV and
throttle bodyB
P0441
Variation in EVAP pressure is less than 0.3 kPa
(2.25 mmHg) for 10 seconds, after proceeding from
step 3/5 to step 4/5
Purge VSV stuck closedC
*: The DTCs relating to the EVAP system displayed on a hand-held tester when checking.
B Go to step 15
C Go to step 12
A
Page 1430 of 2572
G36782
Purge VSV
Vent Valve
Vacuum Pump
EVAP Pressure
Positive
ON: Open
NegativeONON
Steps
(Reference)
ON
OFF: Closed
OFF: Vent ON: Closed
Time
60
sec
5/5
Leak Pressure First 0.02 inch
Standard
Gross Leak
Small Leak
No Leak
Leak PressureSecond 0.02 inch
Standard x 0.2
05-332
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
522 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
10 PERFORM EVAP SYSTEM CHECK(STEP 5/5)
(a) Check the EVAP pressure in step 5/5.
(b) Compare the EVAP pressure in step 3/5 and the second 0.02 inch leak pressure standard (step 5/5).
Result:
DTCs*Test ResultsSuspected Trouble AreasProceed To
'EVAP pressure (step 3/5) lower than the second
0.02 inch leak pressure standard (step 5/5)Not yet determined (no leakage from EVAP system)A
P0441 and
P0455EVAP pressure (step 3/5) higher than [second 0.02
inch leak pressure standard (step 5/5) x 0.2]Purge VSV stuck open
EVAP gross leakB
P0456EVAP pressure (step 3/5) higher than second 0.02
inch leak pressure standard (step 5/5)EVAP small leakB
*: The DTCs relating to the EVAP system displayed on a hand-held tester when checking.
A Go to step 36
B Go to step 12