2001 TOYOTA HIGHLANDER o2 sensor

I39976
Wire Harness View:
Automatic Light Control Sensor
A23
1
E74263
Multiplex Network Body ECU
Connector Front View:
B9
B9-12
- DIAGNOSTICSLIGHTING SYSTEM
05-1593
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2005 HIGHLANDER REPAIR MANUAL (RM1144U)
6 CHECK HARNESS AND CONNECTOR(MULTIPLEX NETWORK BODY ECU -
AUTOMATIC LIGHT CONTROL SENSOR)
(a) Disconnect the B9 connector from the multiplex network
body ECU.
(b) Measure the resistance according to the value(s) in the
table below.
Standard:
Tester connectionConditionSpecified condition
A23-1 - B9-12AlwaysBelow 1 W
NG REPAIR OR REPLACE HARNESS OR
CONNECTOR
OK
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
(SEE PAGE 05-1538)

G31593
Warmed up
sufficiently
Approx.100 km/h
(62 mph)
Vehicle Speed
Approx. 80 km/h
(50 mph)
0
Lock-up ON
Vehicle Speed
Stop
(Idling)
Maintain a constant speed or gradual acceleration (with the throttle open)
for 3 minutes or more.
*1
Normal acceleration
through all the gears from 1st to 4th(O/D)
- DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U241E/U140F)05-903
1093 Author
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2005 HIGHLANDER REPAIR MANUAL (RM1144U)
HINT:
*1: Drive at such a speed in the uppermost gear, to engage lock-up. The vehicle can be driven at a speed
lower than that in the above diagram under the lock-up condition.
NOTICE:
It is necessary to drive the vehicle for approximately 30 minutes to detect DTC P0711 (ATF tempera-
ture sensor malfunction).

05IS4-02
I38224
I38227
I38228
- DIAGNOSTICSNAVIGATION SYSTEM
05-1765
1955 Author
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2005 HIGHLANDER REPAIR MANUAL (RM1144U)
NAVIGATION CHECK MODE (VEHICLE SENSORS)
HINT:

This mode checks the vehicle signal status to the navigation ECU.

Illustrations may differ from the actual vehicle depending on the device settings and options. There-
fore, some detailed areas may not be shown exactly the same as on the actual vehicle.
1. Enter diagnostic mode (see page 05-1784).
2. Select ºNavigation Checkº from the ºDiagnosis
MENUº screen.
3. Select ºVehicle Sensorsº from the ºNavigation
Checkº screen.
4. Check all the signals and sensors when vehicle sig-
nal information is displayed.
HINT:
This screen is updated once per second when input signals to
the vehicle are changed.

05-1674
- DIAGNOSTICSAUDIO SYSTEM
1864 Author
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2005 HIGHLANDER REPAIR MANUAL (RM1144U)
NOISE OCCURS
INSPECTION PROCEDURE
1 CHECK OF SPEAKER INSTALLATION
(a) Check the speaker installation condition.
(1) Check that each speaker is securely installed.
OK: Malfunction disappears.
HINT:
The radio is equipped with a noise prevention system that blocks only excessively loud noise. If loud noise
occurs, check whether or not the ground on the antenna installation part and the proper noise-prevention
equipment are all installed, and whether or not there is improper wiring.
Condition in which noise occursNoise type
Depressing the acceleration pedal increases the noise, and stopping the
engine stops the noise immediately.Alternator noise
Noise occurs during A/C or the heater operation.Blower motor noise
Rapid acceleration during the drive on an unpaved road or after the ignition
switch is turned on makes noise.Fuel pump noise
Pressing and then releasing the horn switch, and keeping pressing the horn
switch makes noise.Horn noise
Quiet noise is heard while the engine is running, but stops with the engine.Ignition noise
Noise occurs in turn with the blink of the turn signal flash.Flasher noise
Noise occurs during window washer operation.Washer noise
Noise occurs while the engine is running, and it continues even after the en-
gine is stopped.Water temperature sensor noise
Noise occurs during wiper operation.Wiper noise
Noise occurs when the brake pedal is depressed.Stop light switch noise
OthersStatic electricity on the vehicle
HINT:

Identify the condition in which the noise occurs, and check the noise filter on the related part.

Make sure first that there is no noise from outside. Failing to do so makes the noise occurrence source
detection difficult and leads to misdiagnosis.

The noise should be removed in descending order of loudness.
NG INSTALL IT PROPERLY
OK
IDENTIFICATION OF NOISE SOURCE
055M1-10

05F45-05
01 BANK 1 - SENSOR 1
01 BANK 1 - SENSOR 2
01 BANK 2 - SENSOR 1
01 BANK 2 - SENSOR 2
A21190
O2S TEST RESULT Screen 05-22
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
212 Author
: Date
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2005 HIGHLANDER REPAIR MANUAL (RM1144U)
O2S TEST RESULT
1. INTRODUCTION
The O2S TEST RESULT refers to the results of the engine con-
trol module (ECM) when it monitors the oxygen sensor (O2S),
and it can be read using the hand-held tester or the generic
OBD II scan tool. Based on this, you can find the O2S's condi-
tions.
The ECM monitors the O2S for various data. You can read the
monitor result (TEST DATA) of each monitor item using the O2S
TEST RESULT. However, the output value of the TEST DATA
is the latest ºsnapshotº value that is taken after monitoring and
therefore it is not dynamic.
In this repair manual, the description of the O2S TEST RESULT
(for O2S related DTCs) are written in a table.
This table consists of 5 items:
(1) TEST ID (a code applied to each TEST DATA)
(2) Description of TEST DATA
(3) Conversion Factor (When conversion factor has a
value written in the table, multiply the TEST DATA
value appearing on the scan tool by the conversion
factor value. The result will be the required value.)
(4) Unit
(5) Standard Value
If the TEST DATA value appearing on the scan tool is out of the
standard value, the O2S is malfunctioning. If it is within the stan-
dard value, the O2S is functioning normally. However, if the val-
ue is on the borderline of the standard value, the O2S may mal-
function very soon.
2. HOW TO READ O2S TEST RESULT USING HAND-
HELD TESTER
(a) Connect the hand-held tester to the DLC3.
(b) On the tester screen, select the following menus: DIAG-
NOSIS / CARB OBDII / O2S TEST RESULT. A list of the
O2S equipped on the vehicle will be displayed.

05ETG-02
05-1536
- DIAGNOSTICSLIGHTING SYSTEM
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2005 HIGHLANDER REPAIR MANUAL (RM1144U)
OPERATION CHECK
1. ILLUMINATED ENTRY SYSTEM OPERATION CHECK
(a) Illuminated entry system controls the following lamps:

Ignition key cylinder lamp

Interior lamp (Room lamp assy No.1)

Personal lamp (Overhead J/B)
(b) Check that the lamps come on after:
(1) Unlocking any door that was closed and locked with the ignition switch off.
(c) Check that the lamps fade out after:
(1) Leaving the doors unlocked for 15 seconds
(2) Turning the ignition switch to the ACC or ON position
(3) Locking all the doors
(d) Check that the lamps stay ON for at least 15 seconds after opening any of the doors, then fade out
again after 15 seconds.
(e) Check that the lamps fade out after:
(1) Leaving the doors unlocked for 15 seconds
(2) Locking all the doors
(f) Check that the lamps stay ON for at least 15 seconds after opening any of the doors, then fade out
again in 15 seconds after closing all the doors.
(g) Check that the lamps come on when opening any of the doors or turning the ignition switch off from
the ACC or ON position.
2. LIGHT AUTO TURN OFF OPERATION CHECK
(a) Turn the ignition switch to the ON position, and switch the headlamps into the TAIL or HEAD position.
(b) Turn the ignition switch off and open the driver's door, and check that the headlamps go off immediate-
ly.
(c) Turn the ignition switch to the ON position, and switch the headlamps into the AUTO position.
(d) Turn the ignition switch off and open the driver's door when operating the automatic light control sys-
tem, and check that the headlamps go off immediately.
3. AUTOMATIC LIGHT CONTROL OPERATION CHECK
HINT:
Perform the operation check at a location with bright surroundings.
(a) Turn the ignition switch to the ON position.
(b) Turn the headlamp dimmer switch to the AUTO position.
(c) Cover the automatic light control sensor and check that the taillamp and headlamp in order.
(d) Uncover the automatic light control sensor and check that the headlamp and taillamp go off in order.
4. DAYTIME RUNNING LIGHT OPERATION CHECK
(a) Check that the high beams come on when the headlamp switch is off with the engine running and park-
ing brake released.
(b) Check that the high beams go off when turning the headlamp dimmer switch into the TAIL or HEAD
(LOW) position under the condition as shown in (a).
(c) Check that the high beams go off when turning the ignition switch off under the condition as shown
in (a).

A82390
Fast SensorSlow Sensor Locus Length
A/F Output (V)
Fuel Trim
05-302
- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
492 Author
: Date
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2005 HIGHLANDER REPAIR MANUAL (RM1144U)
DTC P2A00 A/F SENSOR CIRCUIT SLOW RESPONSE
(BANK 1 SENSOR 1)
CIRCUIT DESCRIPTION
Refer to DTC P2195 on page 05-269.
DTC No.DTC Detection ConditionTrouble Area
P2A00
In conditions (a), (b) and (c), when A/F sensor output voltage
change value is below regular value against fuel trim change
value, ECM judges that A/F sensor circuit has slow response:
(2 trip detection logic)
(a) Engine is warmed up
(b) Engine speed 1,400 rpm or more
(c) Vehicle speed 60 to 120 km/h (37 to 74 mph)

Open or short in A/F sensor circuit

A/F sensor

A/F sensor heater

EFI relay

Open or short in A/F sensor and EFI relay circuits

Air induction system

Fuel pressure

Injector

PCV hose connection

ECM
MONITOR DESCRIPTION
The Air-Fuel ratio (A/F) sensor varies its output voltage in proportion to the air-fuel ratio. Based on the output
voltage, the ECM determines if the air-fuel ratio is RICH or LEAN and adjusts the stoichiometric air-fuel ratio.
The ECM also checks the fuel injection volume compensation value to check if the A/F sensor is deteriorating
or not. A/F sensor response deterioration is determined by the ratio of the A/F sensor output voltage variation
and fuel trim variation.
05EW5-06

- DIAGNOSTICSSFI SYSTEM (2AZ-FE)
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MONITOR STRATEGY
Related DTCsP2A00: A/F sensor slow response
Required sensors / components (Main)A/F sensor
Required sensors / components (Related)Vehicle speed sensor (VSS) and crankshaft position (CKP) sensor
Frequency of operationOnce per driving cycle
Duration60 sec.
MIL operation2 driving cycles
Sequence of operationNone
TYPICAL ENABLING CONDITIONS
The monitor will run whenever these DTCs are not presentSee page 05-16
Engine conditionRunning
Time after engine start120 sec. or more
Fuel system statusClosed Loop
A/F sensor statusActivated
IdleOFF
Time after idle OFF2 sec. or more
Engine RPM1,400 to 3,200 rpm
Vehicle speed60 to 120 km/h (37.5 to 75 mph)
Fuel cutOFF
Time after fuel cut is OFF2 sec. or more
Driving for 20 sec. or more40 km/h (25 mph) or more and 900 rpm or more
TYPICAL MALFUNCTION THRESHOLDS
Response rate deterioration level8 or more
MONITOR RESULT
Refer to page 05-24 for detailed information.
The test value and test limit information are described as shown in the following table. Check the monitor
result and test values after performing the monitor drive pattern (see page 05-26).

TID (Test Identification Data) is assigned to each emissions-related component.

TLT (Test Limit Type):
If TLT is 0, the component is malfunctioning when the test value is higher than the test limit.
If TLT is 1, the component is malfunctioning when the test value is lower than the test limit.

CID (Component Identification Data) is assigned to each test value.

Unit Conversion is used to calculate the test value indicated on generic OBD ll scan tools.
TID $06: A/F sensor
TLTCIDUnit ConversionDescription of Test DataDescription of Test Limit
0$01Multiply by 0.000244
(no dimension)Parameter for identify A/F sensor response
rateMalfunction threshold for A/F sensor deteri-
oration
WIRING DIAGRAM
Refer to DTC P2195 on page 05-269.
INSPECTION PROCEDURE
HINT:
Hand-held tester only:
The malfunctioning area can be found by the ACTIVE TEST A/F CONTROL operation. The A/F CONTROL
operation can determine if the A/F sensor, heated oxygen sensor or other suspected trouble areas are mal-
functioning or not.