engine TOYOTA HIGHLANDER 2001 Service Repair Manual

2005 HIGHLANDER (EWD592U)
181
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

2005 HIGHLANDER (EWD592U)
184
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

2005 HIGHLANDER (EWD592U)
186
VSC and Tire Pressure Warning System
: 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)
IC2
IC352Engine Room Main Wire and Cowl Wire (Left Cowl Side Panel)
IC4
g()
IF252Instrument Panel Wire and Cowl Wire (Right Side of Instrument Panel J/B)IF352Instrument Panel Wire and Cowl Wire (Right Side of Instrument Panel J/B)
IK354Engine Room Main Wire and Cowl Wire (Right Cowl Side Panel)
IL154Instrument Panel Wire and Cowl Wire (Upper Side of Passenger Side J/B)IL254Instrument Panel Wire and Cowl Wire (Upper Side of Passenger Side J/B)
IO254Cowl Wire and Floor Wire (Right Kick Panel)
: GROUND POINTS
CodeSee PageGround Points Location
EA48 (3MZ-FE)EA50 (2AZ-FE)Right Front Fender Apron
EB48 (3MZ-FE)Right Front Fender Apron
EB50 (2AZ-FE)
EH48 (3MZ-FE)Under the Left HeadlightEH50 (2AZ-FE)Under the Left Headlight
IB52Right Instrument Panel Brace
IC52Right Cowl Side Panel
BB56Right Center Pillar
BF56Near the Rear Side Marker Light RH

2005 HIGHLANDER (EWD592U)
190
Power Window
GRB G GRO BR* 1 : w/ Navigation System
* 2 : w/o Navigation System
7. 5A
RAD NO. 2
1J 6
3A 10
3B 5 3A 8
3C 6
D 9 A 5 A 17 B 20 B21
GR
B
B
BR
GGRW
PD PU ACC IG BECU
A 2 D 7
IB 3B 3
3F 13 GND1 GND2
W- B W- B
IC 4H 11
4N 1
W- B W- B
4L 7
W- B
A 10
O
MPX2
B 6
IL2 1A 21
B 9
GR SB
MPX1B 2
A 9
YV
WMPX+
MPX-
MPX-
MPX+
MPX2
MPX1
W
3J 12
3E 1
G
MPD2
MPD1
IL2 12
B 1B2
A 1A2
A17MPX1 MPX2
G
GV R
BR BR
BR
11
4
(
*1)(
*1) (
*1)
G 5(
*2)
22 24
29
18E 6 From Power Source System (
See Page 62)
S30(
A)
, S31(
B) C11(
A)
, C12(
B)
A10(
A)
, A11(
B)
B 9(
A)
, B10(
B)
,
B11(
C)
, B12(
D)
A/C Control
Assembly
Airbag Sensor Assembly Body ECU
Combination Meter
Engine Control
Module
Gateway ECU
Shor t Connector

2005 HIGHLANDER (EWD592U)
192
Power Window
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
CodeSee PageJunction Block and Wire Harness (Connector Location)
1D
1G29Cowl Wire and Instrument Panel J/B (Lower Finish Panel)
1H
()
1J28Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)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
3C30Instrument Panel Wire and Center J/B (Behind the Instrument Panel Center)3EInstrument Panel Wire and Center J/B (Behind the Instrument Panel Center)
3F
3J31
4A
4F33
4HCowl Wire and Passenger Side J/B (Right Side of Grove Box)4ICowl Wire and Passenger Side J/B (Right Side of Grove Box)
4L32
4N
: 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)
IB152Front Door LH Wire and Cowl Wire (Left Kick Panel)IB252Front Door LH Wire and Cowl Wire (Left Kick Panel)
IC352Engine Room Main Wire and Cowl Wire (Left Cowl Side Panel)
IF352Instrument Panel Wire and Cowl Wire (Right Side of Instrument Panel J/B)
IL154Instrument Panel Wire and Cowl Wire (Upper Side of Passenger Side J/B)IL254Instrument Panel Wire and Cowl Wire (Upper Side of Passenger Side J/B)
IN154Front Door RH Wire and Cowl Wire (Right Kick Panel)IN254Front Door RH Wire and Cowl Wire (Right Kick Panel)
IO154Cowl Wire and Floor Wire (Right Kick Panel)IO254Cowl Wire and Floor Wire (Right Kick Panel)
BB156Rear Door No.1 LH Wire and Floor No.2 Wire (Left Center Pillar)
BC156Rear Door No.1 RH Wire and Floor Wire (Right Center Pillar)
: GROUND POINTS
CodeSee PageGround Points Location
IB52Right Instrument Panel Brace
IC52Right Cowl Side Panel
BA56Left Center Pillar
BB56Right Center Pillar

2005 HIGHLANDER (EWD592U)
194
Door Lock Control
25A
DOOR LOCK
2A 2
7. 5A
RAD NO. 2
1J 6
IK2 8
3A 8
3E 13C 6
3G 12
R- B
W B
B BRG
D 9
BECUA 5
IGA 17
ACC D 4
BDR1 1D 3
IB2 2IB23 IB1 3IL1 8
IF3 5
IB2 1 4F 7A 10MPX2
IB2 8
920 108 7
W- L
R- L L- W
YVBR
WY V
YSB
O
CPUB SIG BDRMPX2 MPX1
IB1 2
4L 8
1D 144M 6 1E 4
IA
W- B
W- B W- B
W- B
D12 414 316
4321G
Y
LG
BR
2
IN12
W- B W- B GN D KL KUL L SWE LSW
7. 5A ECU- B
2A 4
IC3 5
1G 10
W- L BR
7. 5A
IG1
1D 1
P 5 1K 6
4A 5 IL2 1
A 21B 9
SB
B 2A 9
Y
R
1H 61K 10
IL2 12MPX1 6B
W
MPX2
MPX+
G
GR
MPX-MPX1
MPX-
MPX+4O 4
MPX1 31
L UL E LSSR12
IA2 14 IA14
BG3 9BG24 3B
LG V
B
1 23O 3
BR
YY
(
*4)
B14 W- B
BE A 4L 10
W- B
W- B
J14
(
*4)
(
*4)20A
P FR DOOR
24 22MPX1 MPX2
A 1A2
B 1B2 A17
BR
BR BR G
MPD2
4 11
MPD1
G 5
V
(
*1)
G(
*1) 3H 5
V
(
*3)R
3A 10
3B 5
18 29
G
(
*2)GR
T 4IL2 8IL217
UL 33 15
L
BR
(
*3)
SB
(
*3)
LG
(
*3)
Y
(
*3) From Power Source System (
See Page 62)
B 9(
A)
, B10(
B)
, B11(
C)
, B12(
D)
S30(
A)
, S31(
B) A10(
A)
, A11(
B)
C11(
A)
, C12(
B)
A/C Control Assembly
Airbag Sensor
Assembly
Body ECU
Back Door Key Lock and
Unlock SWCombination Meter
Door Key Lock and Unlock SW Front LH
Door Lock Motor Front LH
Door Unlock Detection SW Front LH
Gat ewa y ECU
Junction
Connector
Op tion
Connector 1
Power Window Master SW with ECU
Shor t Connector
Theft Deter rent ECU
Engine Control
Module E 6

2005 HIGHLANDER (EWD592U)
198
Door Lock Control
: PARTS LOCATION
CodeSee PageCodeSee PageCodeSee Page
A10A42D844J1244
A11B42D944J1344
A1742D1044J1444
B9A42D1144J1643
B10B42D1244K443
B11C42D1344O343
B12D42D1444P544
B1444D1544R1245
B1544E642S30A43
C11A42G543S31B43
C12B42J543T443
D342J643
D744J1044
: 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)1G29Cowl Wire and Instrument Panel J/B (Lower Finish Panel)
1H
1J28Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)1K28Instrument Panel Wire and Instrument Panel J/B (Lower Finish Panel)
2A27Engine Room Main Wire and Engine Room J/B (Engine Compartment Left)
3A
3B303C30
Instrument Panel Wire and Center J/B (Behind the Instrument Panel Center)3EInstrument Panel Wire and Center J/B (Behind the Instrument Panel Center)
3G313H31
4A
4F334G33
4HCowl Wire and Passenger Side J/B (Right Side of Grove Box)
4L
g(g )
4M32
4O

2005 HIGHLANDER (EWD592U)
199
: 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)
IB152Front Door LH Wire and Cowl Wire (Left Kick Panel)IB252Front Door LH Wire and Cowl Wire (Left Kick Panel)
IC352Engine Room Main Wire and Cowl Wire (Left Cowl Side Panel)
IF352Instrument Panel Wire and Cowl Wire (Right Side of Instrument Panel J/B)
IK254Engine Room Main Wire and Cowl Wire (Right Cowl Side Panel)
IL154Instrument Panel Wire and Cowl Wire (Upper Side of Passenger Side J/B)IL254Instrument Panel Wire and Cowl Wire (Upper Side of Passenger Side J/B)
IN154Front Door RH Wire and Cowl Wire (Right Kick Panel)IN254Front Door RH Wire and Cowl Wire (Right Kick Panel)
IO254Cowl Wire and Floor Wire (Right Kick Panel)
BB156Rear Door No.1 LH Wire and Floor No.2 Wire (Left Center Pillar)
BC156Rear Door No.1 RH Wire and Floor Wire (Right Center Pillar)
BG256Back Door No 1 Wire and Floor No 2 Wire (Rear Left of the Roof)BG356Back Door No.1 Wire and Floor No.2 Wire (Rear Left of the Roof)
BH156Floor No.2 Wire and Floor Wire (Near the Rear Side Marker Light RH)
: GROUND POINTS
CodeSee PageGround Points Location
IA52Left Cowl Side Panel
IC52Right Cowl Side Panel
BA56Left Center Pillar
BB56Right Center Pillar
BC56Left Side of Rear Cross Member
BE56Left Side of Back Door
: SPLICE POINTS
CodeSee PageWire Harness with Splice PointsCodeSee PageWire Harness with Splice Points
B456Front Door RH Wire

2005 HIGHLANDER (EWD592U)
200
Wireless Door Lock Control
7. 5A
RAD
NO. 2
1J 6
3A 8 3A 10
3C 6 3B 5
W B BRG
D 9
BECUA 5
IGA 17
ACC 1D 3
IB2 2IB2 3
IB1 3IL1 8
IF3 5
IB2 1 4F 7A 10MPX2
IB2 8
920 108
W- L
R- L L- W
GRBR
WY V
Y SB
O
CPUB SIG BDRMPX2
IB1 2
4L 8
4L 10 1D 144M 6 1E 4
IA
W- B
W- B W- B
W- BIB1 5IB14 B BIA2 13 D 1ACT+
D 2ACTD
56
D12 414 316
4321
G
Y
LG
BR
W
RL
BRL
L
B
2G
L
IN12
W- B W- B GND KL KUL LSWE LSW
BR
7. 5A
ECU- B
2A 4
IC3 5
1G 10
W- L BR
7. 5A
IG1
1D 1
P 5
20A
P FR DOOR
1K 6
4A 5 A 21B 9
Y G Y
R
1H 61K 10
IL2 12MPX1 6B
W
MPX+G
GR
MPD2 MPX-
MPD1
L UL E LSSR L UL
M 7
V
MPX1J 5
B 2A 9
MPX-
MPX+IL21
3J 123E 1
11
4B 1B2 A 1A2
31
V
MPX1
T 4
3H 5MPX1 MPX2
BR BR
BR
A17
G
G 5
SB GR
G
(
*1)
(
*1)
B MPX2
MPX1
E 6
29
24 1822
(
*3)
(
*2) From Power Source System (
See Page 62)
C11(
A)
, C12(
B)
S30(
A)
, S31(
B)
B 9(
A)
, B10(
B)
, B11(
C)
, B12(
D)
A10(
A)
, A11(
B)
A/C Contr ol Assembly
Airbag Sensor
Assembly
Body ECU
Combi nati on Meter
Door Key Lock and Unlock SW Front LH
Door Lock Motor Front LH
Door Unlock Detection SW Front LH
Engine Control
Module Gateway ECU
Juncti on
Connector
Power Window Master SW
with ECU
Short Connector Theft Deterrent ECU