TOYOTA HIGHLANDER 2001 Service Repair Manual

2005 HIGHLANDER (EWD592U)
176
Cruise Control for 2AZ-FE
The cruise control system is a constant vehicle speed controller in which control of the switch on the instrument panel makes
it possible to automatically adjust the opening of the engine throttle valve without depressing of the accel pedal.
1. Set Operation
When the ON-OFF SW is turned on, the system starts preparations necessary for the cruise control and turns on the
indicator light in the combination meter.
2. Set Speed Control
When the - SET SW is operated with the ON-OFF SW turned on during travelling, the constant vehicle speed is controlled.
3. Coast Control
When the - SET SW is kept turned on during cruise control travelling, the engine control module controls the throttle valve to
decelerate the vehicle. Every time the - SET SW is turned on instantaneously, the vehicle speed is decelerated
approximately 1.5 km/h.
4. Accel Control
When the + RES SW is kept turned on during cruise control travelling, the engine control module controls the throttle valve to
accelerate the vehicle. Every time the + RES SW is turned on instantaneously, the vehicle speed is accelerated
approximately 1.5 km/h.
5. Resume Control
When the vehicle speed is within the low speed limit (Approximately 40 km/h, 25 mph) if the cruise control is cancelled, use
of the + RES SW accelerates the vehicle to the speed level used before canceling the cruise control.
6. Manual Cancel Mechanism
If any of the following signals is input during cruise control travelling, the cruise control is cancelled.
*The stop light SW is turned on.
*The CANCEL SW is turned on.
*The ON-OFF SW is turned off.
*Gear is shifted from D position to other positions than D.
7. Auto Cancel Function
If any of the following conditions is encountered, the cruise control is automatically cancelled.
*The stop light SW wiring is faulty or short-circuited.
*The vehicle speed signal is faulty.
*The electronically controlled throttle malfunctions.
8. Overdrive Control Function
The overdrive control may be cancelled if the vehicle travels on the slope during cruise control travelling. After the overdrive
control has been cancelled, when climbing hill is judged to finish from throttle opening information, the vehicle returns to the
overdrive control mode again after the overdrive return timer is completed.
E5 (A), E6 (B), E7 (E), E8 (D), E9 (C) Engine Control Module
(A) 9-Ground : Approx. 12 volts with ignition SW at ON or ST position
(A) 1, (B) 6-Ground : Always approx. 12 volts
(C) 1, (C) 7, (D) 6, (D) 7, (E) 6, (E) 7-Ground : Always continuity
(B)19-Ground : Approx. 12 volts with brake pedal depressed
(B)24-Ground : Continuity with ON-OFF SW at on in cruise control SW
Approx. 1540 W with CANCEL SW on in cruise control SW
Approx. 240 W with + RES SW on in cruise control SW
Approx. 630 W with - SET SW on in cruise control SW
C16 Combination SW
5-4 : Approx. 1540 W with CANCEL SW on
Approx. 240 W with + RES SW on
Approx. 630 W with - SET SW on
System Outline
Service Hints

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: PARTS LOCATION
CodeSee PageCodeSee PageCodeSee Page
A10A42E5A42P141 (2AZ-FE)
A11B42E6B42P544
A1742E7E42S1543
A2742E8D42S2741 (2AZ-FE)
B9A42E9C42S28A43
B10B42E1040 (2AZ-FE)S29B43
C11A42G543S30A43
C12B42J241 (2AZ-FE)S31B43
C1642J643T1341 (2AZ-FE)
D342J743
E240 (2AZ-FE)J1643
: RELAY BLOCKS
CodeSee PageRelay Blocks (Relay Block Location)
222Engine Room R/B (Engine Compartment Left)
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
CodeSee PageJunction Block and Wire Harness (Connector Location)
1E29Cowl Wire and Instrument Panel J/B (Lower Finish Panel)1G29Cowl 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)
2F
gg(g)
3A
3B
3C303D30
Instrument Panel Wire and Center J/B (Behind the Instrument Panel Center)3EInstrument Panel Wire and Center J/B (Behind the Instrument Panel Center)
3F
3J313K31
4A
4D
4E33
4FCowl Wire and Passenger Side J/B (Right Side of Grove Box)
4H
g(g )
4L324M32
: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
CodeSee PageJoining Wire Harness and Wire Harness (Connector Location)
IB252Front Door LH Wire and Cowl Wire (Left Kick Panel)
IC1
IC352Engine Room Main Wire and Cowl Wire (Left Cowl Side Panel)
IC4
g()
IF352Instrument Panel Wire and Cowl Wire (Right Side of Instrument Panel J/B)
IK254Engine Room Main Wire and Cowl Wire (Right Cowl Side Panel)IK354Engine Room Main Wire and Cowl Wire (Right Cowl Side Panel)
IL254Instrument Panel Wire and Cowl Wire (Upper Side of Passenger Side J/B)
IM154Engine Wire and Cowl Wire (Right Kick Panel)

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Cruise Control for 2AZ-FE
: GROUND POINTS
CodeSee PageGround Points Location
EE50 (2AZ-FE)Intake Side of Cylinder Block
EF50 (2AZ-FE)Left Side of Cylinder Block
EH50 (2AZ-FE)Under the Left Headlight
IB52Right Instrument Panel Brace
: SPLICE POINTS
CodeSee PageWire Harness with Splice PointsCodeSee PageWire Harness with Splice Points
E950 (2AZ-FE)Engine WireI754Cowl Wire
I654Engine Wire

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MEMO

2005 HIGHLANDER (EWD592U)
180
VSC and Tire Pressure Warning System
5
2 5
55IA1 IO2
MR 15 14
MRF1 2
IC2 6IC215
519 31
+BS RR+ RR-
1 2 FSW+
7
4J 3
4M 9
Y
R+ 45
B13
A25
28PKB
O
RL
1
S27
P 3ABS CUT RelayFL MAIN
3. 0W
Battery
WB
B- R
G- W
R- W B
GR
P Y
BRB B- OLG
B- R
2IO2
G- R
12 IA1
V RA24
RL- RL+6 2016 IC2 7IC22
1
Y- G
G
1 43CSW
41INIT
L- R
B- Y W W- B
W- B
IB
W- BT 6
4
121
P22
IC4 17 IC42
3J 44J6
ABS MTR Relay W- L
BM 25
1 89
50A ABS2 30A ABS1
5
5 5 51 51
32 32B- O
B
B
3F 13 4L74J 7
4N 1 4D 4 93G
IC
W- B
IL1 17 IC46
IF3 13
W
W- B
SB
P W- B
W- B W- B
IC4 11
LG
EH
W- B
1 GN D2
W- BF 7
(
*1) (
*1) (
*1) (
*1)
W- B 4C 3
W- B
ABS Speed Sensor Rear LH
ABS Speed Sensor Rear RH Br ake Pedal Load
Sensing SWFusible Link Block
Parking Brake SWPr essure SW
Skid Control ECU with Actuator
TRAC Off SW

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A 5
R- Y
17
FR- 1
2
18 IC4 5IC4 2 1
3IC4
GND1 FL -
32 4
A
EB 10
NEO9
ENG+23
ENG-8
TRC+22
TRC- NEO
17ENG+
24ENG-
30TRC+
25TRC-
31
S27E 5
B
W- B
IC4
O
P
18
FL+
V
W- L
W- G
G- B
Y- BB
V
R
Y
G
8
BR
WP-BGR- B
4I 5
4A 12
P
SIL TS CANL CANH 712146W 13
D 3 D/G
24TS
W
FR+ 3
LGA 4
IC4 21IC4 7IC419
EA A
A
P
9IC4
V
WFSE
42
15
WFSE
W- L
B
B
V
J16
BR
SB
V SB
5IC2 4IC4 16 IC4 IC4 15
L
LG- B
R- L
L- Y
WB BR- R
SBV W CANL
25 CANH
11 VSCW
36 WA
29 BRL
44 SP1
12
SB
BR
Y
11E20A
STOP
1 2
B
S15
34L 11 4A
22 IC4
G- Y
STP 27
B
B
13 IC4 12 IC4
L
W W
B
AW- B
W- B
J 4B- R BR- W
B- R
IG1
46
BR- W
BZ
30
W- B * 1 : 2WD
W- B
W- BFrom Power Source System (
See Page 62)
ABS Speed Sensor Front LH
ABS Speed Sensor Front RH
Data Link Connector 3Engine Control Module
Junction
Connector
Junction
Connector
Stop Light SW
Skid Control ECU with Actuator

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VSC and Tire Pressure Warning System
A J16
A 21
11
W- B W- B
BR
12 IO213
W- L4C
B W
WL1D 9
GND CANH CANL ESSIG
CANH
L
O W- B
J19
L WW- B
8 19
BRSB SBV
BR SB SBV B WCANL
Y 1
S14
IG
1 10 9 25 1
20
BF 1G
W
104
P
2A7. 5A
ECU- B
P
BAT
3
J17
W
W- BG O
G
BGRY
4M
B
IO2 2
W
10E
YE
22 BR- W
B- R
BR- W
B- R GR
V
208IO2 3
3 11 4H
IC44C
IC4 102
2
9 44J
V 81 2 10 1D10A
ECU- IG
LG
LG
11K
V
IC3 5
BBA
W- B
W- B
W- BFrom Power Source System (
See Page 62)
Junction
Connector
Junction
Connector
Junction
Connector Steering Sensor
VSC War ning Buzzer
Yaw Rate SensorBuzzer

2005 HIGHLANDER (EWD592U)
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10A
IGN
1G 6
V
SB
SB
BR
ABS VSC
Brake
W- BB 7A17 B11 B10 LG4M 4
4E 1
J 6
E
E
P SB
SB
6IF3 IF3 6IF2
R
IF3 16 15
V
R- B W- B VB WP
B 4P
W SB
IL1 9
A 13
IC4 1IF318
GR BR
6B
IB A 12 A 2A
5V 7V
Speedometer
1
B 6
R
11 A
3B 12
3K 2 11 IL2
IK3 12 V
VR
32A 10A
DOME
LG V
33D 93F
LG
PB
73C 43A 13 1KFrom Power Source System (
See Page 62)
10A
HEATER
BR
B 6
6B
(
2WD)(
2WD) TRAC OFFSlip Tire Air
Pressure
64H 11 4D
C11(
A)
, C12(
B)
Brake Warning SW
Combination Meter
Junction
Connector
2 1

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VSC and Tire Pressure Warning System
1. ABS Operation
If the brake pedal is depressed suddenly, the ABS controls the hydraulic pressure of the wheel cylinders for all the four
wheels to automatically avoid wheel locking and ensure the directional and steering stability of the vehicle. If the brake pedal
is depressed suddenly, the skid control ECU with actuator controls the solenoids in the actuators using the signals from the
sensors to move the brake fluid to the reservoir in order to release the braking pressure applied to the wheel cylinder. If the
skid control ECU with actuator detects that the fluid pressure in the wheel cylinder is insufficient, the ECU controls the
solenoids in the actuators to increase the braking pressure.
2. Traction Control Operation
The traction control system controls the engine torque, the hydraulic pressure of the driving wheel cylinders, slipping of the
wheels which may occur at start or acceleration of the vehicle, to ensure an optimal driving power and vehicle stability
corresponding to the road conditions.
3. VSC Operation
Unexpected road conditions, vehicle speed, emergency situation, and any other external factors may cause large under- or
over-steering of the vehicle. If this occurs, the VSC system automatically controls the engine power and wheel brakes to
reduce the under- or over-steering.
To reduce large over-steering :
If the VSC system determines that the over-steering is large, it activates the brakes for the outer front turning wheels
depending on the degree of the over-steering to produce the moment toward the outside of the vehicle and reduce the
over-steering.
To reduce large under-steering :
If the VSC system determines that the under-steering is large, it controls the engine power and activates the rear wheel
brakes to reduce the under-steering.
VSC indicator light
If an mulfunction occurs in the VSC system, the VSC indicator lights up to warn the driver.
4. Mutual System Control
To efficiently operate the VSC system at its optimal level, the VSC system and other control systems are mutually controlled
while the VSC system is being operated.
Engine control
The engine power does not interfere with the VSC brake control by fuel cut controlling and reducing the engine output.
Engine control and electronically controlled transmission control
The strong braking force does not interfere with the braking force control of the VSC system by turning off the accel and
reducing changes in the driving torque at shift-down.
VSC system operation indication
The slip indicator light flashes and the buzzer alarm intermittently to warn the driver that the current road is slippery, while the
VSC system is being operated.
5. Fail Safe Function
If an mulfunction occurs in the skid control ECU with actuator, sensor signals, and/or actuators, the skid control ECU with
actuator inhibits the brake actuator control and inputs the mulfunction signal to the engine control module. According to the
mulfunction signal, the brake actuator turns off the solenoid and the engine control module rejects any electronically
controlled request from the VSC system. As a result, the vehicle functions without the ABS, BA, TRAC, and VSC systems.
A4, A5 ABS Speed Sensor Front LH, RH
1-2 : 1.4-1.8 kW (20°C, 68°F)
A24, A25 ABS Speed Sensor Rear LH, RH
1-2 : 0.9-1.3 kW (25°C, 77°F) (4WD)
1-2 : Max. 1.45 kW (25°C, 77°F) (2WD)
B4 Brake Warning SW
1-2 : Closed with the float down
S27 Skid Control ECU with Actuator
46-Ground : Approx. 12 volts with the ignition SW at ON position
27-Ground : Approx. 12 volts with the stop light SW on (Brake pedal depressed)
31-Ground : Always continuity
S15 Stop Light SW
2-1 : Closed with brake pedal depressed
System Outline
Service Hints

2005 HIGHLANDER (EWD592U)
185
: PARTS LOCATION
CodeSee PageCodeSee PageCodeSee Page
A438 (3MZ-FE)C12B42J1944A440 (2AZ-FE)D342P343
A538 (3MZ-FE)E542P2243A540 (2AZ-FE)F738 (3MZ-FE)S1443
A2444F740 (2AZ-FE)S1543
A2544J439 (3MZ-FE)S2739 (3MZ-FE)
B438 (3MZ-FE)J441 (2AZ-FE)S2741 (2AZ-FE)B440 (2AZ-FE)J643T643
B1342J1643V843
C11A42J1743Y145
: RELAY BLOCKS
CodeSee PageRelay Blocks (Relay Block Location)
523ABS R/B (Engine Compartment Rear Left)
: 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)
1G
()
1K28Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)
2A27Engine Room Main Wire and Engine Room J/B (Engine Compartment Left)
3A
3B
3C30
3DInstrument Panel Wire and Center J/B (Behind the Instrument Panel Center)3FInstrument Panel Wire and Center J/B (Behind the Instrument Panel Center)
3G
3J31
3K
4A
4C
4D33
4E
4HCowl Wire and Passenger Side J/B (Right Side of Grove Box)4ICowl Wire and Passenger Side J/B (Right Side of Grove Box)
4J
4L32
4M
4N