turn signal TOYOTA HIGHLANDER 2001 Service Repair Manual

05-928- DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U241E/U140F)
111 8 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
DTC P0710 TRANSMISSION FLUID TEMPERATURE
SENSOR ºAº CIRCUIT
DTC P0712 TRANSMISSION FLUID TEMPERATURE
SENSOR ºAº CIRCUIT LOW INPUT
DTC P0713 TRANSMISSION FLUID TEMPERATURE
SENSOR ºAº CIRCUIT HIGH INPUT
CIRCUIT DESCRIPTION
The ATF (Automatic Transmission Fluid) temperature sensor converts the fluid temperature into a resistance
value which is input into the ECM.
The ECM applies a voltage to the temperature sensor through ECM terminal THO1 (THO).
The sensor resistance changes with the transmission fluid temperature. As the temperature becomes high-
er, the sensor resistance decreases.
One terminal of the sensor is grounded so that the sensor resistance decreases and the voltage goes down
as the temperature becomes higher.
The ECM calculates the fluid temperature based on the voltage signal.
DTC No.DTC Detection ConditionTrouble Area
P0710
(a) and (b) is detected momentary within 0.5 sec. when neither
P0712 or P0713 is not detected (1-trip detection logic)
(a) ATF temperature sensor resistance is less than 79 W.
(b) ATF temperature sensor resistance is more than 156 kW.
HINT:
Within 0.5 sec., the malfunction switches from (a) to (b) or from
(b) to (a)

Open or short in ATF temperature sensor circuit

Transmission wire (ATF temperature sensor)

ECM
P0712ATF temperature sensor resistance is less than 79 W for 0.5
sec. or more (1-trip detection logic)
Short in ATF temperature sensor circuit

Transmission wire (ATF temperature sensor)

ECM
P0713
ATF temperature sensor resistance is more than 156 kW when
15 minutes or more after the engine start
DTC is detected for 0.5 sec. or more (1-trip detection logic)
Open in ATF temperature sensor circuit

Transmission wire (ATF temperature sensor)

ECM
MONITOR DESCRIPTION
The automatic transmission fluid (ATF) temperature sensor converts ATF temperature to an electrical resis-
tance value. Based on the resistance, the ECM determines the ATF temperature, and the ECM detects an
opens or shorts in the ATF temperature circuit. If the resistance value of the ATF temperature is less than
79
W*1 or more than 156 kW*2, the ECM interprets this as a fault in the ATF sensor or wiring. The ECM will
turn on the MIL and store the DTC.
*1: 150C (302F) or more is indicated regardless of the actual ATF temperature.
*2: -40C (-40F) is indicated regardless of the actual ATF temperature.
HINT:
The ATF temperature can be checked on the OBD II scan tool or hand-held tester display.
0527N-31

05-944- DIAGNOSTICSELECTRONIC CONTROLLED AUTOMATIC
TRANSAXLE [ECT] (U241E/U140F)
1134 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
DTC P0741 TORQUE CONVERTER CLUTCH SOLENOID
PERFORMANCE (SHIFT SOLENOID VALVE
DSL)
SYSTEM DESCRIPTION
The ECM uses the signals from the throttle position sensor, Air-flow meter, turbine (input) speed sensor,
intermediate (counter) shaft speed sensor and crankshaft position sensor to monitor the engagement condi-
tion of the lock-up clutch.
Then the ECM compares the engagement condition of the lock-up clutch with the lock-up schedule in the
ECM memory to detect a mechanical problems of the shift solenoid valve DSL, valve body and torque con-
verter clutch.
DTC No.DTC Detection ConditionTrouble Area
P0741
Lock-up does not occur when driving in lock-up range (normal
driving at 85 km/h [53 mph]), or lock-up remains ON in lock-
up OFF range (2-trip detection logic)

Shift solenoid valve DSL remains open or closed

Valve body is blocked

Shift solenoid valve DSL

Torque converter clutch

Automatic transaxle (clutch, brake or gear etc.)

Line pressure is too low

ECM
MONITOR DESCRIPTION
Torque converter lock-up is controlled by the ECM based on speed sensor (NT), speed sensor (NC), engine
rpm, engine load, engine temperature, vehicle speed, transmission temperature, and gear selection. The
ECM determines the lock-up status of the torque converter by comparing the engine rpm (NE) to the input
turbine rpm (NT). The ECM calculates the actual transmission gear by comparing input turbine rpm (NT) to
counter gear rpm (NC). When conditions are appropriate, the ECM requests ºlock-upº by applying control
voltage to shift solenoid DSL. When the DSL is turned on, solenoid DSL applies pressure to the lock-up relay
valve and locks the torque converter clutch.
If the ECM detects no lock-up after lock-up has been requested or if it detects lock-up when it is not re-
quested, the ECM interprets this as a fault in the shift solenoid valve DSL or lock-up system performance.
The ECM will turn on the MIL and store the DTC.
Example:
When any of the following is met, the system judges it as a malfunction.
(a) There is a difference in rotation between before and after torque converters even when the ECM com-
mands lock-up.
(Engine speed is at least 75 rpm greater than input turbine speed.)
(b) There is no difference in rotation between before and after torque converters even when the ECM com-
mands lock-up off.
(The difference between engine speed and input turbine speed is less than 35 rpm.)
05F3F-05

05IS9-02
05-1778
- DIAGNOSTICSNAVIGATION SYSTEM
1968 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
PROBLEM SYMPTOMS TABLE
HINT:

Before performing verification listed in the table below, check the fuse and relay.

Methods used to verify the cause of the problem are listed in order of probability in the verification col-
umn.

If there are two or more parts to be replaced in the verification column, check the symptom after replac-
ing each part. If the symptom still occurs, replace the following part in the colummn.
Display function
SymptomVerificationSee page
Black screen (No image appears on navigation/audio screen).
1. ºBLACK SCREEN (NO IMAGE APPEARS ON NAV-
IGATION AND AUDIO SCREEN)º
2. Power source circuit (multi-display)
3. Replace multi-display05-1805
05-1828
67-8
Illumination for panel switch does not come on with TAIL switch
on.
1. ºILLUMINATION FOR PANEL SWITCH DOES NOT
COME ON WITH TAIL SWITCH ONº
2. Dimmer signal circuit
3. Replace multi-display05-1806
05-1854
67-8
Display does not dim (Night Screen) with TAIL switch on.
1. ºDISPLAY DOES NOT DIM (NIGHT SCREEN) WITH
TAIL SWITCH ONº
2. Replace multi-display
3. Replace gateway ECU
4. Replace combination meter assy05-1807
67-8
67-21
71-18
Power does not turn off (The screen remains on).1. Power source circuit (multi-display)
2. Replace multi-display05-1828
67-8
Panel switch does not function.
1. ºPANEL SWITCH DOES NOT FUNCTIONº
2. Power source circuit (multi-display)
3. Replace multi-display05-1808
05-1828
67-8
Touch panel switch does not function.
1. ºTOUCH PANEL SWITCH DOES NOT FUNCTIONº
2. Power source circuit (multi-display)
3. Replace multi-display05-1809
05-1828
67-8
Screen is distorted.
1. Display signal circuit (navigation ECU - multi-display)
2. Replace navigation ECU
3. Replace multi-display05-1852
67-9
67-8
Screen flicker or color distortion.
1. ºSCREEN FLICKER OR COLOR DISTORTIONº
2. Display signal circuit (navigation ECU - multi-display)
3. Replace navigation ECU
4. Replace multi-display05-1810
05-1852
67-9
67-8
Switches can be operated while vehicle is running1. Speed signal circuit (multi-display - combination meter
assy)05-1841
DVD image cannot be displayed on front screen. (Parking brake
is on.) *11. Parking brake switch circuit05-1846
*1: w/ Rear Seat Entertainment System

F46775
Tire Pressure
Warning Lamp
Lamp Output Pattern:
ON
OFFIgnition Switch ON
3 to 4 Sec.
F46779DLC3
Hand-Held
Tester
F46773
Tire Pressure Warning
Reset SwitchTire Pressure
Warning Lamp
ON
OFF Lamp Output Pattern:

Normal Condition
Switch ON
ON
OFFSwitch
Operating
0.5 Sec.
0.5 Sec.

System Malfunction 05-738
- DIAGNOSTICSTIRE PRESSURE WARNING SYSTEM
928 Author
: Date
:
2005 HIGHLANDER REPAIR MANUAL (RM1144U)
(h) Turn the ignition switch to the ON position.
(i) Check that the tire pressure warning lamp goes off.
(j) Initialize the tire pressure warning system
(see page 05-736).
2. TEST MODE (USING THE HAND-HELD TESTER)
(a) Connect the hand-held tester to the DLC3.
(b) Turn the ignition switch to the ON position.
(c) Select ºSIGNAL CHECKº, and proceed checking with the
hand-held tester.
(d) Press the tire pressure warning reset switch.
(e) Check that the tire pressure warning lamp comes on.
HINT:
Unless (d) above is done, the tire pressure warning lamp
remains off while in test mode.
When there is a problem with the tire pressure warning
system, the tire pressure warning lamp blinks at 0.5 se-
cond intervals.
If the lamp output result is not normal, proceed to the problem
symptoms table (see page 05-740).
(f) Turn the ignition switch off.

05CCZ-12
- DIAGNOSTICSABS WITH EBD & BA & TRAC & VSC SYSTEM
05-779
969 Author
: Date
:
DIAGNOSTIC TROUBLE CODE CHART
HINT:

If a malfunction code is displayed during the DTC check, check the circuit indicated by the DTC. For
details of each code, turn to the page for the respective ºDTC No.º in the DTC chart.

When U0121/94, U0123/62, U0124/95 or U0126/63 are output, inspect and repair the trouble areas
indicated by U0121/94, U0123/62, U0124/95 or U0126/63 first.
DTC chart of ABS:
DTC No.
(See Page)Detection ItemTrouble Area
C0200/31*1
(05-788)Right front wheel speed sensor signal malfunction

Right front and left front speed sensor

Each speed sensor circuit

Sensor rotor

Sensor installation
C0205/32*1
(05-788)Left front wheel speed sensor signal malfunction

Right front and left front speed sensor

Each speed sensor circuit

Sensor rotor

Sensor installation
C0210/33*1
(05-795)Right rear wheel speed sensor signal malfunction

Right rear and left rear speed sensor

Each speed sensor circuit

Sensor rotor

Sensor installation
C0215/34*1
(05-795)Left rear wheel speed sensor signal malfunction

Right rear and left rear speed sensor

Each speed sensor circuit

Sensor rotor

Sensor installation
C0226/21
(05-802)Open or short circuit in brake actuator solenoid circuit
(SFR circuit)
ABS & TRAC actuator

SFRH or SFRR circuit
C0236/22
(05-802)Open or short circuit in brake actuator solenoid circuit
(SFL circuit)
ABS & TRAC actuator

SFLH or SFLR circuit
C0246/23
(05-802)Open or short circuit in brake actuator solenoid circuit
(SRR circuit)
ABS & TRAC actuator

SRRH or SRRR circuit
C0256/24
(05-802)Open or short circuit in brake actuator solenoid circuit
(SRL circuit)
ABS & TRAC actuator

SRLH or SRLR circuit
C0273/13*1
(05-804)Open circuit in ABS MTR relay circuit

ABS No.2 fuse

ABS MTR relay

ABS MTR relay circuit

J/B No.2
C0274/14
(05-804)Short circuit in ABS MTR relay circuit

ABS No.2 fuse

ABS MTR relay

ABS MTR relay circuit

J/B No.2
C0278/11
(05-809)Open circuit in ABS SOL relay circuit

ABS No.1 fuse

ABS SOL relay

ABS SOL relay circuit

ABS & TRAC actuator
C0279/12
(05-809)Short circuit in ABS SOL relay circuit

ABS No.1 fuse

ABS SOL relay

ABS SOL relay circuit

ABS & TRAC actuator
C1225/25
(05-802)Open or short circuit in brake actuator solenoid circuit
(SMC circuit)
SMF or SMR circuit

ABS & TRAC actuator
C1235/35
(05-788)Foreign matter is attached on the tip of the right front sensor

Right front and left front speed sensor

Each speed sensor

Sensor installation

2005 HIGHLANDER (EWD592U)
18
E GLOSSARY OF TERMS AND SYMBOLS
BATTERY
Stores chemical energy and
converts it into electrical energy.
Provides DC current for the auto's
various electrical circuits.GROUND
The point at which wiring attaches to
the Body, thereby providing a return
path for an electrical circuit; without a
ground, current cannot flow.
CAPACITOR (Condenser)
A small holding unit for temporary
storage of electrical voltage.HEADLIGHTS
Current flow causes a headlight
filament to heat up and emit light. A
headlight may have either a single
(1) filament or a double (2) filament
1. SINGLE
FILAMENT
CIGARETTE LIGHTER
An electric resistance heating
element.2. DOUBLE
FILAMENT
CIRCUIT BREAKER
Basically a reusable fuse, a circuit
breaker will heat and open if too
much current flows through it.
Some units automatically reset when
cool, others must be manually reset.HORN
An electric device which sounds a
loud audible signal.
DIODE
A semiconductor which allows
current flow in only one direction.IGNITION COIL
Converts low-voltage DC current
into high-voltage ignition current for
firing the spark plugs.
DIODE, ZENERA diode which allows current flow in one
direction but blocks reverse flow only up
to a specific voltage. Above that potential,
it passes the excess voltage. This acts as
a simple voltage regulator.LIGHT
Current flow through a filament
causes the filament to heat up and
emit light.
PHOTODIODE
The photodiode is a semiconductor
which controls the current flow
according to the amount of light.LED (LIGHT EMITTING DIODE)
Upon current flow, these diodes emit
light without producing the heat of a
comparable light.
DISTRIBUTOR, IIA
Channels high-voltage current from
the ignition coil to the individual
spark plugs.METER, ANALOG
Current flow activates a magnetic
coil which causes a needle to move,
thereby providing a relative display
against a background calibration.
FUSEA thin metal strip which burns through
when too much current flows through it,
thereby stopping current flow and
protecting a circuit from damage.
FUSIBLE LINK
METER, DIGITAL
Current flow activates one or many
LED's, LCD's, or fluorescent
displays, which provide a relative or
digital display.
FUEL
FUSIBLE LINK
A heavy-gauge wire placed in high
amperage circuits which burns through on
overloads, thereby protecting the circuit.
The numbers indicate the crosssection
surface area of the wires.(for Medium Current Fuse)
(for High Current Fuse or
Fusible Link)MOTOR
A power unit which converts
electrical energy into mechanical
energy, especially rotary motion.
M

2005 HIGHLANDER (EWD592U)
19
E
RELAY
Basically, an electrically operated
switch which may be normally
closed (1) or open (2).
Current flow through a small coil
creates a magnetic field which either
opens or closes an attached switch.
1. NORMALLY
CLOSED
2. NORMALLY
OPEN
SWITCH, MANUAL
Opens and closes
iitth b
SPEAKER
An electromechanical device which
creates sound waves from current
flow.
RELAY, DOUBLE THROW
A relay which passes current
through one set of contacts or the
other.
circuits, thereby
stopping (1) or
allowing (2) current
flow.1. NORMALLY
OPEN
2. NORMALLY
CLOSED
RESISTOR
An electrical component with a fixed
resistance, placed in a circuit to
reduce voltage to a specific value.SWITCH, DOUBLE THROW
A switch which continuously passes
current through one set of contacts
or the other.
RESISTOR, TAPPED
A resistor which supplies two or
more different non adjustable
resistance values.SWITCH, IGNITION
A key operated switch with several
positions which allows various
circuits, particularly the primary
ignition circuit, to become
operational.
RESISTOR, VARIABLE or RHEOSTAT
A controllable resistor with a variable
rate of resistance.
Also called a potentiometer or
rheostat.
SENSOR (Thermistor)
A resistor which varies its resistance
with temperature.SWITCH, WIPER PARK
Automatically returns wipers to the
stop position when the wiper switch
is turned off.
(Reed Switch Type)
SENSOR, SPEED
Uses magnetic impulses to open
and close a switch to create a signal
for activation of other components.TRANSISTOR
A solidstate device typically used as
an electronic relay; stops or passes
current depending on the voltage
applied at ºbaseº.
SHORT PIN
Used to provide an unbroken
connection within a junction block.WIRES
Wires are always drawn as
straight lines on wiring
diagrams.
Crossed wires (1) without a
black dot at the junction are
tj i d
(1) NOT
CONNECTED
SOLENOID
An electromagnetic coil which forms
a magnetic field when current flows,
to move a plunger, etc.
j
not joined;
crossed wires (2) with a
black dot or octagonal ( )
mark at the junction are
spliced (joined)
connections.
(2) SPLICED

2005 HIGHLANDER (EWD592U)
314
I GROUND POINT
Brake Warning SW
Skid Control
ECU with
ActuatorFront Fog Light LH
Washer Level
Sensor
Front Turn Signal
Light RH
Headlight RH
(
Low Beam)
Headlight LH
(
Low Beam)
STARTER Relay
Pressur e SW
INVERTER Relay Engine Hood
Cour tesy SW
Front Turn Signal
Light LH
Headlight LH
(
Low Beam)
Front Fog Light
RHA
A W- B
W- BA
A
A
A
AW- B
W- B
W- B
W- B
W- B
EA EB
J 4
J 3
DRL NO. 3 RelayW- B
W- B(
*1)
(
*1)E12 3
3
W- B DRL NO. 4 RelayW- B
(
*1)
(
*1) 3
3
W- B
(
*1)
A
A
A
A
EHW- B W- B W- B W- B A
A
A
A
EG W- B
W- B
W- B
(
*1)
W- BJ 1 (
GND1)
J 2Front Parking
Light RH AW-B
Fro nt Parking
Light LHA W- BEFI Relay W- BRR DEF Relay W- BA/F Relay W- B
2
2A
2F7
4
A Water Temp. SW No. 1A W- B
W- B
A AW-B2G2FAN NO. 2 Relay W- B
W- B
(
GND2) W- B Skid Control
ECU with
Actuator
Radi ator Fan MotorW- BE11
W- B
(
*1)
2
2
2Front Parking Light
RH
Junction
ConnectorJunction
Connector
Junction
Connector Junction
Connector
Fro nt Parking
Light LH

2005 HIGHLANDER (EWD592U)
317
Turn Signal
Flasher
Heater Relay
Pr essure SW
Steer ing Sensor
SEAT HEATER Relay
Combination SW
Power Window
Master SW
with ECU
Remote Control
Mir ror LH Transponder Key
Computer
Body ECU
Data Link
Connector 3
Key Inter Lock
Solenoid
Remote Control
Mirror RH Door Lock Control
SW Power Window SW
Fron t RH
Door Unlock
Detection SW
Fron t RH
Wireless Door Lock
Buzzer
Br ake Pedal
Load Sensing SW4C44H11
4C6
4G9
4G8 4H7
4J6
4C3
4L9
4G10
4C5 W- B
W- B
W- B
W- B
W- B
W- B
W- B
W- BW- B
W- BW- B
W- B
W- B
B 2 I B 12
W- B
4L8
W- B
IK33
4M3
W- B
4J7 W- B
W- B4L 10 2
IN1 W- B
B 4W- B B 4 B 4
W- BW- B W- B
W- B
4N1
4L7
IC W- B
W- B(
GN D1)
(
CG)
4H5
W- B
W- B W- B
4D4
IL117
W- B W- B
4K8
W- B4D5
IE18
W- B W- B Air bag Sensor
Assembly
Front Wiper Deicer
Front Wiper Motor(
E1)
(
E2)1L9
1L1
1B9
1B8
1D14 W- B
W- B
W- B
W- B
W- B
W- B
W- B
W- B
Combination SW
Blower Motor
Control
Blower Control SW ACC Relay
IG12 W- B
W- B
W- B
IA 1E4
4M6
W- B
IH13
(
GN D)Engine
Control Module (
EOM)
1Unlock Warning SW
Door Lock Motor
Fron t RH
Door Key Lock and
Unlock SW Front RH

2005 HIGHLANDER (EWD592U)
8
B HOW TO USE THIS MANUAL
The ground points circuit diagram shows the connections from all major parts to the respective ground points. When
troubleshooting a faulty ground point, checking the system circuits which use a common ground may help you identify
the problem ground quickly. The relationship between ground points (
EA, IB and IC shown below) can also be
checked this way.
5
5
5
5
4
44
4
4 BA15IB18EA2
ID115
IC33 IA12 E 3
W-BW-B W-B W-B W-B
W-B
W-B
W-B
W-B W-B
W-B
W-B W-B
W-B
W-B W-B W-BW-B W-B W-B W-B
W-B
W-B
W-B
W-B W-B W-B
W-B
BR
W-B
BR BRW-BW-B W-B
W-B
W-B
W-B
W-B W-B W-B
W-B
W-B W-B
W-B
W-B
BR W-B
BR BR
BR W-B (4A-GZE)
W-B W-BI 2
I 2
B 5 I 5 I 5 I 5
B 5
B 5
B 5
I 5
I 5
I 3 I 3 E 3
E 3
E 3
E 2
E 4
E 5
E 4
E 5
E 6 E 4 E 4
B 4
EA I 4
B 4
B 4
I 4 I 8
IB IC 443E5
3E6 3G13 3F3 3D1 3B7W-B
W-B
W-B W-B W-B
W-B
W-B
W-B
W-B
W-B
W-B
W-B
W-B
W-B W-BI 6
I 6
I 2 3C7
10A A A A
A
A
Junction
Connector J 1
W-B
W-B
W-B W-B
BR W-B W-B
W-B
W-B W-B
W-B
I GROUND POINT
FAN MAIN Relay
FAN MAIN Relay
A/C Relay No.2
A/C Relay No.3
Radiator Fan Motor
Headlight Cleaner Relay
Headlight LH
Headlight RH
Front Fog Light LH
Brake Fluid Level SW Front Fog Light RH Front Turn Signal Light RH
Front Clearance Light RH
Front Turn Signal Light LH
Front Clearance Light LH
Door Lock Control SW
Door Courtesy SW RH
Door Lock Motor RH
Door Lock Control Relay
Blower Resistor
Idle-Up SW
A/C Amplifier
Radio and Player
HEATER Relay
Auto Antenna MotorA/C Control Assembly
Blower Motor
Blower SW
Parking Brake SW
Combination Meter
Combination SW
Cruise Control ECU
Remote Control Mirror SW
Turn Signal Flasher
Defogger SW
Unlock Warning SW
Power Window Master SW
Power Window Control
Relay
Door Courtesy SW LH
Door Lock Control SW
Door Lock Motor LH
Fuel Control SW
Woofer Speaker Amplifier
Combination Meter
Combination Meter
Fuel Sender Cigarette Lighter
O/D Main SW
Clock
Combination SW
*The system shown here is an EXAMPLE ONLY. It is different to the actual circuit shown in the SYSTEM CIRCUITS SECTION.