TOYOTA HIGHLANDER 2001 Service Repair Manual

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146
Automatic Light Control
40A
MAIN
12
C13
Di mmer SWLight
Control SWFlashHighLow HeadTail OFF13 814
16 Auto
IAB 16 B 17 B 18 B 15 3
IK3 4
C 37. 5A
RAD
NO. 2
1J 6
A 21 A 20 A 12 52134 31
A 173C 63A 8
W B RL-R
G
W
R
7. 5A
IG1
1K 10
A 53B 53A 10
GR BR
7. 5A
ECU- B
2A 4
D 91H 61G 10
W- L G
C 11
1IC3 5
BR
A23
D 7
LG
P V OB B
W- BDRL NO. 2
Relay
HRLY ACC IG BECU CLTB CLTE CLTSCLTB CLTE CLTS
A HEAD TAIL HF DCTY2
3 3
3
R- B
2G 4
E10
R- B
R- B
A 7
TRLY
SB
1
1A 1
B
2
1
F 7 Battery
FL MAIN
3. 0W
W140A ALT
2I 1
W W
TAILLIGHT
Relay
51
32
1J 4
3
B
IA1 9From Power Source System (
See Page 62)
B 9(
A)
, B10(
B)
, B11(
C)
, B12(
D)Automatic Light Control Sensor
Body ECU
Combi nati on SW
Door Courtesy SW
Front LH
Fusible Link Block

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Automatic light control is designed for turning taillights and headlights on/off automatically according to the surroundings
brightness when the light control SW is on AUTO position under the condition that the ignition SW is on.
Automatic Light Control Operation
When the surrounding darkens (Darker than the value set for taillight lightning), taillight is automatically turned on under the
condition that the ignition SW is on with the light control SW being on AUTO position. When further darkens (Darker than the
value set for headlight lightning), the headlight is automatically turned on.
In addition, if the brightness reaches the value set for turning the each light off, each light is turned off.
C13 Combination SW
14-16 : Closed with the light control SW at TAIL or HEAD position
13-16 : Closed with the light control SW at HEAD position
12-16 : Closed with the light control SW at AUTO position
D7 Door Courtesy SW Front LH
1-Ground : Closed with the door open
: PARTS LOCATION
CodeSee PageCodeSee PageCodeSee Page
A2342B11C42D744
B9A42B12D42F738 (3MZ-FE)
B10B42C1342
: RELAY BLOCKS
CodeSee PageRelay Blocks (Relay Block Location)
323Engine Room R/B No.3 (Engine Compartment Rear Left)
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
CodeSee PageJunction Block and Wire Harness (Connector Location)
1A29Engine Room Main Wire and Instrument Panel J/B (Lower Finish Panel)
1G29Cowl Wire and Instrument Panel J/B (Lower Finish Panel)1H29Cowl Wire and Instrument Panel J/B (Lower Finish Panel)
1J28Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)1K28Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)
2A
2G27Engine Room Main Wire and Engine Room J/B (Engine Compartment Left)
2I
gg(g)
3A
3B30Instrument Panel Wire and Center J/B (Behind the Instrument Panel Center)
3C
()
: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
CodeSee PageJoining Wire Harness and Wire Harness (Connector Location)
IA152Cowl Wire and Floor No.2 Wire (Left Kick Panel)
IC352Engine Room Main Wire and Cowl Wire (Left Cowl Side Panel)
IK354Engine Room Main Wire and Cowl Wire (Right Cowl Side Panel)
: GROUND POINTS
CodeSee PageGround Points Location
IA52Left Cowl Side Panel
: SPLICE POINTS
CodeSee PageWire Harness with Splice PointsCodeSee PageWire Harness with Splice Points
E1048 (3MZ-FE)Engine Room Main Wire
System Outline
Service Hints

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Light Auto Turn Off System
7. 5A
ECU- B
2A 47. 5A
IG1
1K 10
140A ALT
2
1
F 7 W
1A 115 231J 4
3
TAILLIGHT
Relay 40A MAIN
2I 12G 4
2
13 13 253
DRL NO. 2
Relay
3
B WR-BR-B
41 322B 1HEAD LAMP
Relay
L- R
SB L- R
(
*1)
R- B(
*1) (
*2)
A 7C3IK3 4
R SB
L- R
(
*1)
L- R
(
*2)
TRLY HRLYD 9
G
1H 61G 10IC3 5
BR W- L
BECUA 5
BR
3B 53A 10
GR
IG
B 2KSW
D D
1 2
4L 74G 9
4N 1
IC1C 11
Tail
Head14 13
16 OFFB 18 B17
IA C13
D 7 K 4 J 6
Battery FL MAI N
3. 0W
G G W- B W- B
W- B
BB
V
LG W- B W- B
DCTY TAI L HEAD
* 1 : w/ Dayti me Running Light
* 2 : w/o Daytime Running Light(
*2)
E10
(
*1) (
*1)
IA1 9From Power Source System (
See Page 62)
B 9(
A)
, B10(
B)
, B11(
C)
, B12(
D)
Body ECU
Combination SW
Door Courtesy SW
Front LH
Fusible Link Block
Junction
Connector
Unlock Warning
SW
Light
Control SW

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With the ignition SW turned on, the current flows to TERMINAL (A) 5 of the body ECU through IG1 fuse.
Voltage is applied at all times to TERMINAL (A) 7 of the body ECU through the TAILLIGHT relay. Coil side, and to
TERMINAL (C) 3 through the HEAD LAMP relay coil side (w/o daytime running light) or through the DRL NO.2 relay (w/
daytime running light).
1. Normal Lighting Operation

With the light control SW turned to TAIL position, a signal is input into TERMINAL (B) 18 of the body ECU. Due to this signal,
the current flowing to TERMINAL (A) 7 of the body ECU flows to TERMINAL (B) 18 to TERMINAL 14 of the light control SW
to TERMINAL 16 to GROUND, and TAILLIGHT relay causes taillights to turn on.

With the light control SW turned to HEAD position, a signal is input into TERMINALS (B) 17 and (B) 18 of the body ECU. Due
to this signal, the current flowing to TERMINAL (C) 3 of the body ECU flows to TERMINAL (B) 17 to TERMINAL 13 of the
light control SW to TERMINAL 16 to GROUND in the headlight circuit, and causes TAILLIGHT and HEAD LAMP (w/o
daytime running light) or DRL NO.2 relay (w/ daytime running light) to turn the lights on. The taillight circuit is same as above.
2. Light Auto Turn Off Operation
With light on and ignition SW turned off (Input signal goes to TERMINAL (A) 5 of the body ECU), when the driver's door is
opened (Input signal goes to TERMINAL (C) 11 of the body ECU), the ECU operates and the current is cut off which flows
from TERMINAL (A) 7 of the body ECU to TERMINAL (B) 18 in taillight circuit and from TERMINAL (C) 3 to TERMINAL (B)
17 in headlight circuit.
As a result, all lights are turned off automatically.
B9 (A), B10 (B), B12 (D) Body ECU
(D) 9-Ground : Always approx. 12 volts
(A) 5-Ground : Approx. 12 volts with the ignition SW at ON position
(B)17-Ground : Continuity with the light control SW at HEAD position
K4 Unlock Warning SW
2-1 : Closed with the ignition key in the cylinder
: PARTS LOCATION
CodeSee PageCodeSee PageCodeSee Page
B9A42C1342J643
B10B42D744K443
B11C42F738 (3MZ-FE)
B12D42F740 (2AZ-FE)
: RELAY BLOCKS
CodeSee PageRelay Blocks (Relay Block Location)
323Engine Room R/B No.3 (Engine Compartment Rear Left)
System Outline
Service Hints

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Light Auto Turn Off System
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
CodeSee PageJunction Block and Wire Harness (Connector Location)
1A29Engine Room Main Wire and Instrument Panel J/B (Lower Finish Panel)
1G29Cowl Wire and Instrument Panel J/B (Lower Finish Panel)1H29Cowl Wire and Instrument Panel J/B (Lower Finish Panel)
1J28Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)1K28Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)
2A
2B27Engine Room Main Wire and Engine Room J/B (Engine Compartment Left)2G27Engine Room Main Wire and Engine Room J/B (Engine Compartment Left)
2I
3A30Instrument Panel Wire and Center J/B (Behind the Instrument Panel Center)3B30Instrument Panel Wire and Center J/B (Behind the Instrument Panel Center)
4G33
4L32Cowl Wire and Passenger Side J/B (Right Side of Grove Box)
4N32g(g )
: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
CodeSee PageJoining Wire Harness and Wire Harness (Connector Location)
IA152Cowl Wire and Floor No.2 Wire (Left Kick Panel)
IC352Engine Room Main Wire and Cowl Wire (Left Cowl Side Panel)
IK354Engine Room Main Wire and Cowl Wire (Right Cowl Side Panel)
: GROUND POINTS
CodeSee PageGround Points Location
IA52Left Cowl Side Panel
IC52Right Cowl Side Panel
: SPLICE POINTS
CodeSee PageWire Harness with Splice PointsCodeSee PageWire Harness with Splice Points
E1048 (3MZ-FE)Engine Room Main WireE1050 (2AZ-FE)Engine Room Main Wire

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MEMO

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Trailer Towing
20A TOWING
2F 1
10A TAIL
1H 4
20A STOP
1E 17. 5A
IG1
1E 815A
HAZARD
2B 2
1 2
4L 34L1
4E 8
4E 74C 10
4C 8IL2 20
LH
RH
3B 9
3B 8
IA BC BIA2 1 5261410
323 8
2 8356 14
9
124
19 GND LT/S RT/S TL LT RT
GNDLR LL HAZ EL ERIG B
TAIL +B STP
G- R
W
Y
B
G- W V
BR
B
L
L
R
O
W- B W- BW
G W
R
Y W- B
Y
G
B
W Y
W
W- B W- B W- B W- B
G
T10C13T 8 S15
B 9
J12
7E
13 IA2 12
O
LT/S RT/S TLIA2 3 IC3 9IA18
E E
J13B
BJ10
IA2 6
L BR
IC2 8
LG
L
1E 4
1D 14
W- B
4G 10
4M 64C 4
AA
J20
G
T 9
3E 4
8
Hazard
SW
A10HAZ F
R
DD
B 9
W- B
B
R
8
M 3HAZ
(
*1)
(
*2)
* 1 : w/ Navigation System
* 2 : w/o Navigation System From Power Source System (
See Page 62)
Hazard
SWTurn
SW
A/C Control
AssemblyBody ECUCombination SW
Junction
Connector Junction
Connector
Junction
Connector
Junction
Connector
Multi- Display Stop Light SW
Turn Signal Flasher
Towing Converter
Trailer Hitch

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T9 Towing Converter
3-Ground : Approx. 12 volts with the light control SW at TAIL or HEAD position
8-Ground : Always approx. 12 volts
5-Ground : Always continuity
9-Ground : Approx. 12 volts with the stop light SW on
S15 Stop Light SW
1-2 : Closed with the brake pedal depressed
: PARTS LOCATION
CodeSee PageCodeSee PageCodeSee Page
A1042J1244S1543
B942J1344T843
C1342J2043T945
J1044M343T1045
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
CodeSee PageJunction Block and Wire Harness (Connector Location)
1D
1E29Cowl Wire and Instrument Panel J/B (Lower Finish Panel)
1H
()
2B27Engine Room Main Wire and Engine Room J/B (Engine Compartment Left)2F27Engine Room Main Wire and Engine Room J/B (Engine Compartment Left)
3B30Instrument Panel Wire and Center J/B (Behind the Instrument Panel Center)3E30Instrument Panel Wire and Center J/B (Behind the Instrument Panel Center)
4C
4E33
4GCowl Wire and Passenger Side J/B (Right Side of Grove Box)
4L32
g(g )
4M32
: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
CodeSee PageJoining Wire Harness and Wire Harness (Connector Location)
IA152Cowl Wire and Floor No 2 Wire (Left Kick Panel)IA252Cowl Wire and Floor No.2 Wire (Left Kick Panel)
IC252Engine Room Main Wire and Cowl Wire (Left Cowl Side Panel)IC352Engine Room Main Wire and Cowl Wire (Left Cowl Side Panel)
IL254Instrument Panel Wire and Cowl Wire (Upper Side of Passenger Side J/B)
: GROUND POINTS
CodeSee PageGround Points Location
IA52Left Cowl Side Panel
BC56Left Side of Rear Cross Member
: SPLICE POINTS
CodeSee PageWire Harness with Splice PointsCodeSee PageWire Harness with Splice Points
B956Floor No.2 Wire
Service Hints

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MEMO

2005 HIGHLANDER (EWD592U)
155
SRS
NOTICE: When inspecting or repairing the SRS, perform service in accordance with the following precautionary instructions
and the procedure, and precautions in the Repair Manual applicable for the model year.

Malfunction symptoms of the SRS are difficult to confirm, so the DTCs become the most important source of information
when troubleshooting. When troubleshooting the SRS, always inspect the DTCs before disconnecting the battery.

Work must be started more than 90 seconds after the ignition SW is turned to the ºLOCKº position and the
negative (-) terminal cable is disconnected from the battery.
(The SRS is equipped with a back-up power source so that if work is started within 90 seconds from
disconnecting the negative (-) terminal cable of the battery, the SRS may deploy.)

When the negative (-) terminal cable is disconnected from the battery, the memory of the clock and audio system will be
cleared. So before starting work, make a record of the contents in the audio memory system. When work is finished,
reset the audio systems as they were before and adjust the clock. Some vehicles have power tilt steering, power
telescopic steering, power seat and power outside rear view mirror which are all equipped with memory function.
However, it is not possible to make a record of these memory contents. So when the work is finished, it will be
necessary to explain it to your customer, and ask the customer to adjust the features and reset the memory. To avoid
erasing the memory in each system, never use a back-up power supply from outside the vehicle.

Before repair, remove the airbag sensor if shocks are likely to be applied to the sensor during repair.

Do not expose the following parts directly to hot air or flame;

Even in cases of a minor collision where the SRS does not deploy, the following parts should be inspected;

Never use SRS parts from another vehicle. When replacing parts, replace with new parts.

For the purpose of reuse, never disassemble and repair the following parts.

If the following parts have been dropped, or have cracks, dents and other defects in their case, bracket, and connector,
replace with new one.

Use a volt/ohmmeter with high impedance (10 kW/V minimum) for troubleshooting electrical circuits of the system.

Information labels are attached to the periphery of the SRS components. Follow the instructions of the notice.

After work on the SRS is completed, check the SRS warning light.

If the vehicle is equipped with a mobile communication system, refer to the precaution in the IN section of the Repair
Manual.
*Steering wheel pad
*Front passenger airbag assembly
*Side airbag assembly
*Curtain shield airbag assembly
*Seat belt pretensioner
*Center airbag sensor assembly
*Front airbag sensor assembly
*Side airbag sensor assembly