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 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 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 1447 of 2572
05ESR-05
05-42
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
232 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
FAIL-SAFE CHART
If any of the following codes are recorded, the ECM enters fail-safe mode.
DTC No.Fail-Safe OperationFail-Safe Deactivation Conditions
P0031
P0032
P0037
P0038
Turn off heaterIgnition switch OFF
P0100
P0102
P0103Ignition timing is calculated from engine speed and throttle
angleºPassº condition detected
P0110
P0112
P0113
Intake air temperature is fixed at 20°C (68°F)ºPassº condition detected
P0115
P0116
P0117
P0118
Engine coolant temperature is fixed at 80°C (176°F)ºPassº condition detected
P0120
P0121
P0122
P0123
P0220
P0222
P0223
P0604
P0606
P0607
P0657
P2102
P2103
P2111
P2112
P2118
P2119
P2135
If Electronic Throttle Control System (ETCS) has malfunc-
tion, ECM cuts off current to throttle control motor. Throttle
control valve returns to predetermined opening angle
(approximately 16) by force of return spring. ECM then
adjusts engine output by controlling fuel injection (intermit-
tent fuel-cut) and ignition timing in accordance with acceler-
ator pedal opening angle to enable vehicle to continue at
minimal speed.
If accelerator pedal is depressed firmly and slowly, vehicle
can be driven slowly. If accelerator pedal is depressed
quickly, vehicle may speed up and slow down erratically.
ºPassº condition is detected and then ignition switch is turned
OFF, fail-safe operation will stop and system will return to
normal condition
P0325
P0327
P0328
Maximum timing retardationIgnition switch OFF
P0351
P0352
P0353
P0354
Fuel is cutºPassº condition detected
P2120
P2121
P2122
P2123
P2125
P2127
P2128
P2138Accelerator pedal position sensor has two (main and sub)
sensor circuits. If malfunction occurs in either of sensor
circuits, ECM detects abnormal signal voltage difference
between two sensor circuits and switches to limp mode. In
limp mode, remaining circuit is used to calculate accelerator
pedal opening to allow vehicle to continue driving.
If both circuits malfunction, ECM regards opening angle of
accelerator pedal to be fully closed. In this case, throttle
valve will remain closed as if engine is idling.
ºPassº condition is detected and then ignition switch is turned
OFF, fail-safe operation will stop and system will return to
normal condition
Page 1480 of 2572
I30520
ECM
ACMG 2
E6 O
IK3 Magnetic Clutch Relay
9 18 From Fan No. 3
Relay
Y-G
Y-G
EB2
B-Y
3 2
3 8
A2
A/C Magnetic
Clutch and
Lock Sensor 3 2 1
52C
2E 2A B-R
IK27Engine Room J/B
Y From
Battery 05-1 190
- DIAGNOSTICSAIR CONDITIONING SYSTEM
1380 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
COMPRESSOR CIRCUIT
CIRCUIT DESCRIPTION
The ECM and A/C amplifier communicate via BEAN.
The A/C amplifier assy outputs the magnetic clutch ON signal to the ECM.
Receiving this signal, the ECM sends a signal through terminal ACMG and switches the magnetic clutch
relay ON, thus turning on the magnetic clutch.
WIRING DIAGRAM
05IU8-01
Page 1504 of 2572
I40146
LBE-
LBE+A162
A166
A1619
A16113
1 R
G9
MPX+
BEAN
B19
Front Seat Inner Belt Assy (Driver's Side) Airbag Sensor AssemblyC12
Combination Meter Assy
(*2) (*1)
(*2) (*1)
*1: w/o Curtain Shield Airbag
*2: w/ Curtain Shield Airbag
05-1898
- DIAGNOSTICSCOMBINATION METER
2088 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
SEAT BELT WARNING LAMP FOR DRIVER'S SEAT DOES NOT
OPERATE
WIRING DIAGRAM
INSPECTION PROCEDURE
HINT:
If there is an open in the ground circuit (Airbag sensor assy center), the airbag sensor assy center outputs
DTCs. Perform troubleshooting with the ºSupplemental Restraint System 05-1200º.
1 PERFORM ACTIVE TEST BY HAND-HELD TESTER
(a) Operate the hand-held tester according to the steps on the display and select the ºACTIVE TESTº.
METER:
ItemTest DetailsDiagnostic Note
D-BEL T REMINDIndicat. Lamp D-SEAT BELT (OFF/ON)Confirm that the vehicle is stopped and engine
idling
NG REPLACE COMBINATION METER ASSY
(SEE PAGE 71-18)
OK
05IQ1-02
Page 1506 of 2572
I39225
Front Seat Inner Belt Assy (Driver Side)
Wire Harness View:
B4
Airbag Sensor Assy Center
Wire Harness View:
A23
05-1900
- DIAGNOSTICSCOMBINATION METER
2090 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
5 CHECK HARNESS AND CONNECTOR(FRONT SEAT INNER BELT ASSY - AIRBAG
SENSOR ASSY CENTER)(SEE PAGE 01-26)
(a) Disconnect the B4, A23 connectors.
(b) Measure the resistance according to the value(s) in the
table below.
Standard:
Tester ConnectionConditionSpecified Condition
B4-2 - A23-10AlwaysBelow 1 W
A23-10 - Body groundAlways10 kW or higher
NG REPAIR OR REPLACE HARNESS OR
CONNECTOR
OK
END
Page 1511 of 2572
05EYX-02
F46772
Tire Pressure
Warning Reset Switch
Tire Pressure
Warning Lamp
Lamp Output Pattern:
Receipt of the Initialization Signal
Keep pressing
the switch for 3 sec.
1 Sec.
Failure of Initialization
0.25 Sec.
0.25 Sec. ON
OFF ON
OFF
1 Sec. 3 Sec. 05-736
- DIAGNOSTICSTIRE PRESSURE WARNING SYSTEM
926 Author: Date:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
INITIALIZATION
NOTICE:
This system requires initializing after changing tires or wheels, or after rotating the tires.
Be sure to adjust the tire air pressure to the specified value before initialization.
1. INITIALIZING THE TIRE PRESSURE WARNING SYS-
TEM
(a) Check and adjust the tire pressure to the specified value.
Specified Value
Front210 kpa (2.1 kgf/cm2, 30 psi)
Rear210 kpa (2.1 kgf/cm2, 30 psi)
(b) With the vehicle stopped, turn the ignition switch to the
ON position.
(c) Press and hold the tire pressure warning reset switch until
the tire pressure warning lamp blinks 3 times at 1 second
intervals.
HINT:
If the tire pressure warning lamp does not blink, perform the ini-
tialization again. (with the ignition switch off, perform the proce-
dure above starting at step 1-(b).)
(d) Drive the vehicle at 19 mph (30 km/h) or more, to com-
plete the initialization of the skid control ECU. (It takes
more than one hour.)
HINT:
If the tire pressure warning lamp blinks at 0.25 second intervals
while the vehicle is being driven, the initialization may have
failed. If so, perform the initialization again. (Turn the ignition
switch off and retry from step 1-(a).)
(e) After initialization is completed, the skid control ECU mon-
itors the tire pressure by using the wheel speed sensors.
(f) To verify the system has been initialized check the length
of time the tire pressure warning lamp is on after turning
the ignition switch to the ON position.
Not initialized: 4 sec.
Initialized: 3 sec.
