Toyota 4Runner 2006 User Manual

Power Source

B–R

2

Y–R	DEFOG Relay
	2	1	R
	2	2
B–R	3	5
	2			L–Y
W–B	4
	2
		1	2	L–Y
				2

	30A TOWING BRK
B	2	1
	2
		30A BATT CHG
B–Y	2	1
	2
		50A A/PUMP
R	2	1
	2

50A AIR SUS

BR–Y

	50A AM1
1	2
	2
	50A J/B
1	2	L–W	1
	2		1C
	40A TOWING
1	2	L
	2
	10A STOP
1	2	G–W
	2
	15A AC115V INV
1	2	V
	2
	15A FR FOG
1	2	LG
	2

140A ALT

7. 5A OBD

10A MIR HEATER
1	2	B–L
		2
30A DEFOG
1	2	Y–G
		2
1	2	GR
2		2
10A AIRSUS NO. 2
5	3	L–B
4		4
1	2	W–B
4		4
AIR SUS Relay

W–L

10A SECU/HORN

30A P P/SEAT

30A D P/SEAT

1	2
30A POWER
5	3	10A TAIL
1	2
	TAIL Relay
15A PWR OUTLET

2

B

2

2

B

Battery

1	2	1	2	O
			2
			IG Relay		25A SEAT HEATER
				B–Y			LG
		5	3		1	2
			2		2		2
		1	2	W–B
			2
			2	Y–R

54

4RUNNER (EM00T0U)

Y–R	HEATER Relay		L
	1	2
2		2		7.	5A HEATER NO. 2
R	5	3	B–Y	1	2	G–Y
2		2	2			2
		4	W–B
		2

I18

Ignition SW

		ACC	3	W–G
W–L	2 AM1	IG1	4	L–Y

W–L	30A AM2
1	2	R	7	AM2	IG2	6	B–R
		2
					ST2	8	G–B
	40A ABS MTR
1	2	Y–B
		2

60A HEATER

30A ABS SOL

R	2	1	1	2	Y
	2				2

		7. 5A ALT–S
W	2	1
	2
		10A HORN
W–G	2	1
	2
		15A A/F HEATER
B–R	2	1
	2
		15A TRN–HAZ
B–Y	2	1
	2

	Short Pin	W	W
1	2
		2
	20A EFI
1	2	L	L
		2
	10A ETCS
1	2	GR
		2

	20A DR/LCK
1	2	G–W
		2
	30A TOWING

1	2	GR
		2
20A RADIO NO. 2
1	2	W–L
		2
	HEAD Relay

2

R–B

5	3	R–B
	2	2
1	2	W
	2

10A HEAD(HI RH)
1	2	R–W
		2
	10A HEAD(HI LH)
1	2	R–L
		2
10A HEAD(LO RH)
1	2	R–B
		2
10A HEAD(LO LH)
1	2	R–Y
		2

55

4RUNNER (EM00T0U)

Power Source

W–G

L–Y

B–R

G–B

W

L

		7. 5A ACC
W–G	5	10A CIG
	1D

	15A IG1
	10A ECU–IG
	15A RR WSH
	20A 4WD
2	30A FR WIP–WSH
1C
	10A IGN
6	7. 5A GAUGE
1D	10A SRS
3	7. 5A STA NO. 2
1D

		10A DOME
	1	2	2	R
	20A RADIO NO. 1
	1	2	2	L–Y
	2
		10A ECU–B
	1	2	2	W–R
W–G	EFI Relay		W–B
	1	2
	2	2			10A EFI NO. 2
L	5	3	B	1	2	L–W
	2	2		2		2

56

4RUNNER (EM00T0U)

: Parts Location

Code	See Page	Code	See Page	Code	See Page
I18	37

:			Relay Blocks
	Code		See Page	Relay Blocks (Relay Block Location)
2			22	Engine Room R/B (Engine Compartment Left)
4			23	Engine Room R/B No.4 (Engine Compartment Left)
		: Junction Block and Wire Harness Connector
	Code		See Page	Junction Block and Wire Harness (Connector Location)
	1C		24	Engine Room Main Wire and Driver Side J/B (Lower Finish Panel)
	1D

57

4RUNNER (EM00T0U)

Starting

7 AM2

I18

Ignition SW

R

R

2

2

30A

AM2

1

2

B

B–L

( 3)

B–R

( 1)

W

( 4)

Battery

IG2

ST2 8

G–B

R

R	B–Y		B–Y
2	2	2	IC4

RelaySTA	5		1	J35 Junction Connector	B–Y
					G
	3		2
		2	2
	Y–G		W–B
6	EA1		( 1)
4	EA2 ( 2)
	Y–G	( 1)	Y	( 2)

	1	C
1	1	M
A	B
( 2) ( 1)
	S 2(A), (B), S 3(C)
	Starter

1 : 2UZ–FE

2 : 1GR–FE

3 : 1GR–FE Cold Area Spec.

4 : 1GR–FE Except Cold Area Spec.

						G–B
					3	1D
					7. 5A
					STA
					NO. 2
Meter	B–Y
Combination					2	1K
11	IM1		B–Y
B–Y	B–Y	Junction Connector				L–Y
	J27(B), J28(A)		A	A	( 1)
G	G		B	B	( 2)
			A	A	A A ( 1)
			B	B	B B ( 2)

	B–Y	B–Y
1P Park/Neutral SWPosition	5
	P
	N
	4	6	IM2	( 1)
		4	IM2	( 2)
B
J 3 Junction Connector
B

P

B–Y

L–Y

W–B

8 B	11 C	12 C
STAR/	STA	STSW
NSW

E 5(B), E 6(C)

Engine Control Module

EB

58

4RUNNER (EM00T0U)

: Parts Location

	Code		See Page	Code			See Page	Code			See Page
E5		B	37	J27		B	38	S2		A	35 (1GR–FE)
E6		C	37	J28		A	38			B	33 (2UZ–FE)
	I18		37	J35			38	S3		C	33 (2UZ–FE)
	J3		33 (2UZ–FE)	P1			33 (2UZ–FE)				35 (1GR–FE)
			35 (1GR–FE)				35 (1GR–FE)

:				Relay Blocks
	Code			See Page	Relay Blocks (Relay Block Location)
2				22	Engine Room R/B (Engine Compartment Left)
			: Junction Block and Wire Harness Connector
	Code			See Page	Junction Block and Wire Harness (Connector Location)
	1D			24	Engine Room Main Wire and Driver Side J/B (Lower Finish Panel)
	1K			25	Instrument Panel Wire and Driver Side J/B (Lower Finish Panel)
			: Connector Joining Wire Harness and Wire Harness
	Code			See Page	Joining Wire Harness and Wire Harness (Connector Location)
	EA1			44 (2UZ–FE)	Engine No.2 Wire and Engine Room Main Wire (Under the Engine Room R/B)
	EA2			45 (1GR–FE)
	IC4			46	Instrument Panel Wire and Engine Room Main Wire (Left Kick Panel)
	IM1			47	Engine Wire and Instrument Panel Wire (Right Side of Blower Unit)
	IM2
			: Ground Points
	Code			See Page	Ground Points Location
	EB			44 (2UZ–FE)	Front Left Fender
				45 (1GR–FE)

59

4RUNNER (EM00T0U)

Ignition for 2UZ–FE

7	AM2	IG2	6	B–R
		ST2
	I18			7	EA1
	Ignition SW
R					B–Y
				1	EB1
				B–R
				B–R		B–R				B–R
				B–R		B–R			B–R	B–R
						W–B			W–B	W–B
			B–R	W–B	B–R	W–B	B–R	W–B	B–R	W–B
R
			1	4	1	4	1	4	1	4
2		I 1 Ignition Coil and Igniter No. 1	3	I 2 Ignition Coil and Igniter No. 2	3	I 3 Ignition Coil and	Igniter No. 3	2	I 4 Ignition Coil and Igniter No. 4	2
				2		2	3		3
2					LG–B	R–W	L–W	R–W
30A			LG	R–Y					L–Y	R–Y
AM2
				R–Y		R–Y			R–Y	R–Y
1
2						R–W			R–W	R–W
B			LG	R–Y	LG–B	R–W	L–W		L–Y
			8	24	15	25	11		10
			IGT1	IGF1	IGT2	IGF2	IGT3		IGT4
Battery
						E 4

Engine Control Module

60

4RUNNER (EM00T0U)

B–R

B–R

B–R

B–R

B–R

B–R

B–R

W–B

W–B

W–B

W–B

B–R

W–B

B–R

W–B

B–R

W–B

B–R

W–B

W–B

1

4

1

4

1

4

1

4

I 5 Ignition Coil and

Igniter No. 5

2

I 6 Ignition Coil and

Igniter No. 6

2

I 7 Ignition Coil and

Igniter No. 7

2

I 8 Ignition Coil and

Igniter No. 8

2

N 2 Noise Filter (Ignition No. 2)

3

3

3

3

B–L

R–W

G

R–Y

G–W

R–Y

G–B

R–W

R–Y

R–Y

R–Y

R–W

R–W

R–W

B–L

G

G–W

G–B

W–B

13

12

14

9

IGT5

IGT6

IGT7

IGT8

E 4

Engine Control Module

ED

B–R

2

1

W–B

		B–R
	1)	2
	N 1 Noise Filter (Ignition No.
		1

W–B

B

ER EC

61

4RUNNER (EM00T0U)

Ignition for 2UZ–FE

: Parts Location

Code	See Page	Code	See Page	Code	See Page
E4	37	I4	33 (2UZ–FE)	I8	33 (2UZ–FE)
I1	33 (2UZ–FE)	I5	33 (2UZ–FE)	I18	37
I2	33 (2UZ–FE)	I6	33 (2UZ–FE)	N1	33 (2UZ–FE)
I3	33 (2UZ–FE)	I7	33 (2UZ–FE)	N2	33 (2UZ–FE)

:			Relay Blocks
	Code		See Page	Relay Blocks (Relay Block Location)
2			22	Engine Room R/B (Engine Compartment Left)
		: Connector Joining Wire Harness and Wire Harness
	Code		See Page	Joining Wire Harness and Wire Harness (Connector Location)
	EA1		44 (2UZ–FE)	Engine No.2 Wire and Engine Room Main Wire (Under the Engine Room R/B)
	EB1		44 (2UZ–FE)	Engine No.2 Wire and Engine Wire (Near the Starter)

:	Ground Points
Code	See Page	Ground Points Location
EC	44 (2UZ–FE)	Right Bank Cylinder Head
ED	44 (2UZ–FE)	Left Bank Cylinder Head
ER	44 (2UZ–FE)	Rear Side of Front Right Fender

62

4RUNNER (EM00T0U)

Memo

63

4RUNNER (EM00T0U)

Ignition for 1GR–FE

7	AM2	IG2	6	B–R
		ST2
	I18			6	1D
	Ignition SW
R
				4	1H
					B–R
				13	IM1
					B–R
						B–R			B–R	B–R
						W–B			W–B	W–B
			B–R	W–B	B–R	W–B	B–R	W–B	B–R	W–B
R
			1	4	1	4	1	4	1	4
2		I 1 Ignition Coil and Igniter No. 1	3	I 2 Ignition Coil and Igniter No. 2	3	I 3 Ignition Coil and	Igniter No. 3	2	I 4 Ignition Coil and Igniter No. 4	2
				2		2	3		3
2				W–R		W–R		W–R	LG–B	W–R
30A			Y–R		P–L		LG
AM2
				W–R		W–R			W–R	W–R
1
2			Y–R	W–R	P–L				LG–B
							LG
B
			8	24	9		10		11
			IGT1	IGF1	IGT2		IGT3		IGT4
Battery
						E 4
						Engine Control Module

64

4RUNNER (EM00T0U)

B–R		B–R
W–B		W–B
B–R	W–B	B–R	W–B	W–B
1	4	1	4
I 5 Ignition Coil and Igniter No. 5	2	I 6 Ignition Coil and Igniter No. 6	2
3		3
GR	W–R	L	W–R
W–R		W–R

GR	L
12	W–B
	13
IGT5	IGT6

E 4

Engine Control Module

N 1 Noise Filter (Ignition No. 1)

B–R

2

1

W–B

EF

65

4RUNNER (EM00T0U)

Ignition for 1GR–FE

: Parts Location

Code	See Page	Code	See Page	Code	See Page
E4	37	I3	35 (1GR–FE)	I6	35 (1GR–FE)
I1	35 (1GR–FE)	I4	35 (1GR–FE)	I18	37
I2	35 (1GR–FE)	I5	35 (1GR–FE)	N1	35 (1GR–FE)

:				Relay Blocks
	Code			See Page	Relay Blocks (Relay Block Location)
2				22	Engine Room R/B (Engine Compartment Left)
			: Junction Block and Wire Harness Connector
	Code			See Page	Junction Block and Wire Harness (Connector Location)
	1D			24	Engine Room Main Wire and Driver Side J/B (Lower Finish Panel)
	1H			25	Instrument Panel Wire and Driver Side J/B (Lower Finish Panel)
			: Connector Joining Wire Harness and Wire Harness
	Code			See Page	Joining Wire Harness and Wire Harness (Connector Location)
	IM1			47	Engine Wire and Instrument Panel Wire (Right Side of Blower Unit)

:	Ground Points
Code	See Page	Ground Points Location
EF	45 (1GR–FE)	Rear Side of Left Bank Cylinder Block

66

4RUNNER (EM00T0U)

Memo

67

4RUNNER (EM00T0U)

Charging

ACC

W–L

2

AM1

IG1

4

L–Y

7

AM2

IG2

6

B–R

W–L

ST2

W

R

I18

2

2

Ignition SW

B 4

2

Body ECU

AM1

1 : 2UZ–FE

2 : 1GR–FE

50A

14

L

1

GR

2

E

B

140A ALT

1

J18(A), J19(B)

Junction Connector

A

A

A

A

2

GR

6

IC4

B

R

W

2

2

2

GR

2

2

5

EA1

1

EA1

( 1)

7. 5A ALT–S

1

EA2

3

EA2

( 2)

30A AM2

1

1

W

GR

Y–R

2

1

B

4

B

2

B

S

L

IG

B

Battery

IC Regulator

G 1(A), G 2(B)

Generator

68

B–R				L–Y
	6	1D	2	1C
			7. 5A	15A
			GAUGE	IG1
	4	1G	20	1E
	R–L			Y–R
	15	C	J 1 Junction Connector	E
,CC10(C)8(A) MeterCombination	Charge			Y–R
				E
	16	A	J 1 Junction Connector	D
	GR			D

J8(A), J 9(B) Junction Connector	G	B
	G	A	Y–R
GR
		2	EA1	( 1)
		2	EA2	( 2)
			Y–R	W

1 A

B

4RUNNER (EM00T0U)

: Parts Location

Code			See Page	Code			See Page	Code			See Page
B4			36	G2		B	32 (2UZ–FE)	J8		A	38
C8		A	37				34 (1GR–FE)	J9		B	38
C10		C	37	I18			37	J18		A	38
G1		A	32 (2UZ–FE)	J1			33 (2UZ–FE)	J19		B	38
			34 (1GR–FE)				35 (1GR–FE)

:				Relay Blocks
	Code			See Page	Relay Blocks (Relay Block Location)
2				22	Engine Room R/B (Engine Compartment Left)
			: Junction Block and Wire Harness Connector
	Code			See Page	Junction Block and Wire Harness (Connector Location)
	1C			24	Engine Room Main Wire and Driver Side J/B (Lower Finish Panel)
	1D
	1E
	1G			25	Instrument Panel Wire and Driver Side J/B (Lower Finish Panel)
			: Connector Joining Wire Harness and Wire Harness
	Code			See Page	Joining Wire Harness and Wire Harness (Connector Location)
	EA1			44 (2UZ–FE)	Engine No.2 Wire and Engine Room Main Wire (Under the Engine Room R/B)
	EA2			45 (1GR–FE)
	IC4			46	Instrument Panel Wire and Engine Room Main Wire (Left Kick Panel)

69

4RUNNER (EM00T0U)

Engine Control for 2UZ–FE

ACC

AM1 IG1

7 AM2

IG2 6

ST2

R

I18

Ignition SW

R

2

2 AM230A 1

2

B

Battery

	(ACC)	(BAT)
	7. 5A	15A
	ACC	A/F HEATER
		2
8	1K	2

	P		L
F	3E
F	3E
			B–R
	P
38	IC4	L	B–R
	P
	2	2	2

ACC CUT Relay	3	2	A/F HEATER Relay	5	1
	4	1		3	2

2	2	2	2	2
GR	W–G	W	W–B

9 IC4

B A

W

J 2(A), J 3(B)

Junction

Connector

4 IM1

(BAT)

2

2

W–G

L

L

2	2
1	5
EFI Relay
2	3
2	2
	B

W–B

B	A
		L–W
B	B	1 IB2
W–B

EB

B

20A EFI

					B–R
					W–G
					L
					B–O
			B		B–W
			2		2
			5		1
			C/OPN Relay		2
			3
B	B
			2		2
B			B–W		GR–B
B			B
					GR–B
2
1	NO. 2
		11	IC4	33	IC4
	10A EFI
2
					GR–B
2			B
L–W
A	J 4
A

Junction

Connector

A
L–W	GR–B
17 IC3	B

L–W

L–W

W

W–G

70

4RUNNER (EM00T0U)

B

B–R

8

B–R

4

EA1

EB1

1P Park/Neutral SWPosition

5

B–R

P

W–G

N

L

4

B–O

B–R

W–G

B–Y

B–W

L

A

B–W

6

1D

B–O

12

IC4

35

IC4

A

2

2

W–G

B–Y

L

P

4J Junction Connector

C

RelayPUMP

2

3

10A

3

E

8

E

8

B

11

C

IGN

BATT

MREL

STAR/

STA

4

C

NSW

FUEL

1

5

B–O

E 4(A), E 5(B), E 6(C), E 7(D), E 8(E)

Engine Control Module

2

2

2

23

1E

11

1J

IGSW

FPR

FC

+B

+B2

ACCR

G–R

B–Y

B–R

B–R

B–O

9 E 30 C 10 E

1 E

2 E 17 E

B–O

G–R

GR–B

B

B

W–G

2

IB1

B–O

B

B

J31(A), J32(B) JunctionConnector

A

B

A B

G–R

8F

PumpFuel

Resistor

F14 PumpFuel

J 8(A) Junction

Connector

B–O

J31(A), J32(B)

Junction Connector

IC3

5

B–O

B

16

5

IC4

B–R

B–R

B

A

2

4

B

A

B

A

C

A

M

19

IM2

1

W–B

V12

W–G

G–R

A

B

A

B

J40(A), J41(B)

Junction Connector

A

A

W–B

W–B

GR–B

B

L–W

L–W

W

W–G

BO

BL

STA Relay

B–Y

A

AIV2 26 A

		L
	Bank 1)	2
	Switching Valve
		1
	VSV(Air L–W

L–W

B

B–R

Connector

Junction

J28

AIV1 27 A

		P
	Bank 2)	2
	Switching Valve
		1
	V13 VSV(Air L–W

L–W

L–W

W

L–W

71

4RUNNER (EM00T0U)

Engine Control for 2UZ–FE

B B

B–R

B–R

B–R

B–R

B–R

B–R

B–R

Meter

9I

B–R

I10 No.Injector2

B–R

B–R

B–R

I13

No.Injector5

B–R

B–R

B–R

I16 No.Injector8

B–R

Combination

No.Injector1

1

I11 No.Injector3

I12 No.Injector4

1

I14 No.Injector6

I15 No.Injector7

1

1

1

1

1

1

2

2

2

2

2

2

2

2

R–L

R–L

A

J26

Junction Connector

L

W

Y

G

R

W

BR

A

A

R–L

2 C

3 C

4 C

5 C

6 C

7 C

3 A

2 A

# 10

# 20

# 30

# 40

# 50

# 60

# 70

# 80

E 4(A), E 5(B), E 6(C), E 7(D), E 8(E)

Engine Control Module

MPMP

VPMP

PPMP

AIP

6

E

5

E

22

E

L 4

32

A

Canister Pump Module

W–L

R–G

O

R

Canister

Leak

Pressure Sensor

1

EB2

Detection Pump

W–L

M

Valve

2

Vent

AIP

3

8

9

1

6

2

4

E2

VC

1

3

R–G

L–W

W–B

BR

L–R

R

O

BR

L–R

17

IE1

11

IE1

28

IE1

9

IE1

43

IE1

42

IE1

4

EB2

3

EB2

R–G

W–B

L–R

R

O

BR

16

IM2

22

IM2

7

IM2

L–W

L–W

W–B

W

L–W

ED

72

4RUNNER (EM00T0U)

Air Pressure Sensor

A45

L–R

BR

L–W

L–W

L–R

W

BR

B B

1 : Shielded

(ST)

7. 5A

STA

NO. 2

A24

Accel Position Sensor

2

1K

2

Oil

Control Valve LH

2

Oil

Control Valve RH

C 2 Camshaft Timing

C 3 Camshaft Timing

L–Y

VPA1

VPA2

VCP1

VCP2

EP1

EP2

1

1

6

3

4

1

5

2

W–R

R–B

B–Y

W–L

LG–B

V–W

6

IM2

R–W

Y–R

L–Y

34

IC4

31

IC4

26

IC4

9

IC3

29

IC4

8

IC3

P

LG

W–R

R–B

B–Y

W–L

LG–B

V–W

17

C

16

C

15

C

14 C

12 C

18

E

19

E

26

E

27

E

20

E

21

E

OC1+

OC1–

OC2+

OC2–

STSW

VPA

VPA2

VCPA

VCP2

EPA

EPA2

E 4(A), E 5(B), E 6(C), E 7(D), E 8(E)

Engine Control Module

VC

VTA1

VTA2

M+

M–

GE01

THW

VG

E2G

THA

23

A

20 A

19

A

5

A

4

A

17

A

21

A

30

A

29

A

22

A

L–R

L–R

L–R

Y

R–B

1)(

R

G

R–L

W–R

B–W

Y–B

R

2

3

B

2

B

4

B

5

6

4

2

1

CoolantEngine

SensorTemp.

VG

E2G

THA

L–R

VC

VTA1

VTA2

M+

M–

2E

M1(B) AirMass

MeterFlow

E2

E2

+B

T 2

1

5

B

1

B

3

Throttle Control Motor		BR	BR		L–W
Throttle Position Sensor	W
	BR	BR	BR		BR
L–R					L–R
		L–W
BR				J28
			D	Junction	C
L–W	BR	L–W C		Connector
L–W	12
	IM1
		C	D
L–R
			L–W
W					W
BR

73

4RUNNER (EM00T0U)

Engine Control for 2UZ–FE

B

B

1 : Shielded

R–Y

R–Y

R–W

R–W

R–W

R–Y

R–W

R–W

R–Y

R–W

R–Y

R–Y

2

2

2

2

2

2

2

I 1 Ignition Coiland Igniter No. 1

3

I 2 Ignition Coiland Igniter No. 2

3

I 3 Ignition Coiland

Igniter No. 3

I 4 Ignition Coiland

Igniter No. 4

I 5 Ignition Coiland Igniter No. 5

I 6 Ignition Coiland

Igniter No. 6

3

I 7 Ignition Coiland Igniter No. 7

3

3

3

3

R–Y

LG

LG–B

L–W

L–Y

B–L

G

G–W

24

A

8

A

15

A

11 A

10

A

13

A

12

A

14

A

IGF1

IGT1

IGT2

IGT3

IGT4

IGT5

IGT6

IGT7

E 4(A), E 5(B), E 6(C), E 7(D), E 8(E)

Engine Control Module

PRG

ACIS

E2

A2A+

A2A–

HA2A

A1A+

A1A–

HA1A

OX2B

HT2B

34

A

33

A

28 A

23

B

31 B

1 B

22 B

30 B

2

B

33 B

5 B

Y–R

R

BR

( 1)

P

L

B–W

( 1)

Y

BR

A12 RatioFuelAirSensor

R–L

( 1)

W

P

OxygenHeatedSensor Sensor2(Bank2)

V2(B)

VSV(Purge)

1

B

V1(B)

VSV(ACIS)

2

B

2

1

A13 RatioFuelAirSensor Sensor2(Bank1)

2

1

Sensor1(Bank1)

2

4

8H

3

4

3

4

3

1

AF+

AF–

AF+

AF–

OX

HT

2

B

1

B

+B

HT

+B

HT

+B

E1

L–W

L–W

BR

W

W

L–W

BR

BR

BR

BR

BR

J28

L–R

Junction

E

W–B

Connector

E

( 1)

E

C

D

E

E

E

E

W–B

J28

L–R

Junction

W–B

Connector

C

J26

C

D

Junction

W–B

Connector

W

C

C

W

W–B

L–W

L–W

74

4RUNNER (EM00T0U)

B

B

(BAT)

(BAT)

10A

10A

ETCS

STOP

R–W

A32

T 8

2

2

Airbag Sensor

Transponder Key

Assembly

Computer

2

2

G–Y

R–W

G–W

GSW2

EFIO

EFII

E

3C

23

6

7

GR

2

2

LightStopSW

CoilIgnitionand No.Igniter8

H

A

8I

L

W–R

L–R

S12

G–Y

E

G–Y

,J32(B)J31(A)

Junction Connector

3C

3

13

IC4

1

E

B

2

IL1

J 4 Junction Connector

B

15

IC3

R–W

G–B

L

GR

B

G–Y

G–Y

9

A

25

A

32

D

16 D

15

D

7 E

15

E

IGT8

IGF2

F/PS

IMI

IMO

+BM

STP

E 4(A), E 5(B), E 6(C), E 7(D), E 8(E)

Engine Control Module

OX1B

HT1B

G2+

G2–

VV1+

VV1–

VV2+

VV2–

NE–

NE+

18

A

1

A

19

C

29

C

25

C

24 C

18

C

28 C

20

C

21 C

( 1)

B

G–Y

B

W

1)

Y

L

1)

R

G

1)

Y

L

Sensor 2)

(

(

(

3

1

W–B

OX

HT

Heated Oxygen (Bank 1 Sensor

1C CamshaftPosition Sensor

V3(B) SensorVVT LH

V4(B) SensorVVT RH

C4(B) Crankshaft

PositionSensor

BR

L–W

H 6

2

1

B

1

B

W–B

2

B

E1

+B

4

2

3

2

B

2

B

1

B

BR

( 1)

L–R

W–B

L–R

W–B

W–B

W–B

L–W

ED

75

4RUNNER (EM00T0U)

Engine Control for 2UZ–FE

B B

	(BAT)
50A
J/B
	2
	2
	L–W
1	1C
1	5
TAIL Relay
2	3

	1 : Shielded
	2
10A	1
TAIL

30A

DEFOG

5

1L

2

G

2

B

J16

Y–G

Junction

B

Connector

Y–G

18

IC4

G

Y–G

D

3D

D

A

I

A

J31(A), J32(B)

J22(A), J23(B)

E

B

D

3D

G

B

D

B

Junction Connector

Junction Connector

D

A

I

G

Y–G

13

D

12

D

ELS1

ELS2

E 4(A), E 5(B), E 6(C), E 7(D), E 8(E)

Engine Control Module

(BAT)
	140A
	ALT
2
5	1
	DEFOG
	Relay
3	2

2 B–R

	KNK2	EKN2					KNK1			EKNK
21 B		20	B				29	B	28		B
1)	W	B				1)	G			R
(						(
W–B
					BR
2	EB1	8	EB1	3	EB1		6	EB1	7	EB1
1)	W	B			BR	1)	G			R
(						(
		2	B					1
		1	B	K 2(B) Knock Sensor (Bank 2)				K 1	Knock Sensor (Bank 1)
								2

THWO

ACT

AC1

4WD

E1

E01

E02

E03

E04

E05

14

D

25 D

24 D

8 C

1 C

7 A

6 A

4 B

7 B

6 B

,J32(B)J31(A)

Junction Connector

L–B

BR–W

GR–G

W–B

(4WD)

W–B

W–B

W–B

W–B

W–B

W–B

H

B

E

A

L–B

2

IK1

1

IK1

C 3D

C	3D	BR–W	GR–G
L–B
7	A	18 A	7 B
	TWI	ACT	AC1

A16(A), A17(B)

A/C Control Assembly

W–B

(4WD)

W–B

W–B

W–B

W–B

W–B

W–B

EE

EE

76

4RUNNER (EM00T0U)

B

F 9

4WD Control ECU

			L4
		24
		W–L	(4WD)
J29(A), J30(B)	H		B
	Junction Connector	F	A
		W–L	(4WD)
	5	IM2
		W–L	(4WD)
	13		C
			L4
	ME01
	3	B
	BR

BR

ED

J29(A), J30(B)		E	A
	Junction Connector	A	B

LG	L	P–L	G	Y	V
34 D	33 D	23 E	25 E	4 E	13 E
CANL	CANH	TC	AIRP	AIRV	AIDI

E 4(A), E 5(B), E 6(C), E 7(D), E 8(E)

Engine Control Module

	EC	EOM	SPD	TACH	W
9	C	35 D	8 D	1 D	30 D
W–B		W–B	V–R	B–W	R–B
1	IM2

W–B		A	B	J33(A), J34(B)
	A	A	A		Junction Connector
A

W–B

A

J37

Junction

Connector

IK

P–L

V

10		IC3
	V
Driver	2	DI
A43(A), A44(B) InjectionAir Control		B
		VP
	2	A
	G
3		EA1
	G
A46 PumpAir		2
		1
		M
	W–B

W–B

EQ

(BAT)

50A

A/PUMP

2

2

LG

L

P–L

Y			G
14	IC3	4	IC3
Y			G		B	R
3	B		4	B	5 B	1 A
	SIV		SIP		+B	BATT
			VV			E
			6	B	1	B
			L		BR
		4	EA1		4	IN1
			L		BR
		Valve	1
	A47	Air Switching	2
			W–B			BR
						R–B
						B–W
						V–R

77

4RUNNER (EM00T0U)

Engine Control for 2UZ–FE

(BAT)

7. 5A

OBD

2

2

LG

L

P–L

O

C

3C

32

IC4

Y 1

C

3C

Yaw Rate Sensor

Junction Connector

P–L

CANH

CANL

J18

H

3

2

H

W

R

P

V

L

LG

P–L

O

V

P

13

16

14

6

1 B

2 B

1 D

2 D

1 E

2 E

TC

BAT

CANL

CANH

ST–Plug

Connector 3

D 1 Data Link

SG

CG

1 C

2 C

1 A

2 A

J47(A), J48(B), J49(C),

1

F

5

4

J50(D), J51(E), J52(F)

BR

W–B

Junction

BR

B

W

Connector

A

A

A

A

J35(A), J36(B)

11

IC2

22

IC2

W–B

E

B

Junction Connector

E

A

J22(A) Junction Connector

B

Y

B

W

BR

E

A

3

11

11

25

CANH

CANL

CANH

CANL

S28

Skid Control ECU

9

IM2

SP1

with Actuator

S11

12

Steering Sensor

BR

BR

W–B

GR–R

GR–R

R–B

R–B

B–W

B–W

V–R

V–R

A

J 5

Junction

Connector

ED

IG

IH

78

4RUNNER (EM00T0U)

(IG)

(BAT)

7. 5A

10A

GAUGE

DOME

R

2

4

1G

2

R–L

J,J9(B)8(A) Junction Connector

H

A

7J

Junction Connector

D

R

F

B

D

10

IC4

R

R

15

C

16

C

Malfunction Indicator Lamp

Speedometer

Tachometer

C 8(A), C 9(B), C10(C) Combination Meter

A

4

B

6

B

5

B

13

C

7

R–B

GR–R

B–W

V–R

BR

H

B

J,J9(B)8(A) Junction

Connector

1

1G

F

A

11

1K

7

IC2

V–R

7

IM1

GR–R

B–W

B

3D

B

3D

,J32(B)J31(A)

ConnectorJunction

V–R

,J30(B)J29(A)

ConnectorJunction

G

A

G

A

GR–R

F

B

G

B

BR

R–B

B–W

V–R

B–W

V–R

ED

79

4RUNNER (EM00T0U)

Engine Control for 2UZ–FE

System Outline

The engine control system utilizes a microcomputer and maintains overall control of the engine, transmission etc. An outline of the engine control is given here.

1.Input Signals

(1)Engine coolant temp. signal circuit

The engine coolant temp. sensor detects the engine coolant temp. and has a built–in thermistor with a resistance which varies according to the engine coolant temp. The engine coolant temp. is input into TERMINAL THW of the engine control module as a control signal.

(2)Intake air temp. signal circuit

The intake air temp. sensor is installed in the mass air flow meter and detects the intake air temp., which is input as a control signal to TERMINAL THA of the engine control module.

(3)Oxygen sensor signal circuit

The oxygen density in the exhaust emission is detected and is input as a control signal from the heated oxygen sensors to TERMINALS OX1B and OX2B of the engine control module.

(4)RPM signal circuit

The camshaft position is detected by the camshaft position sensor and is input into TERMINAL G2+ of the engine control module as a control signal. Also, the engine RPM is detected by the crankshaft position sensor and the signal is input into TERMINAL NE+ of the engine control module.

(5)Throttle position sensor signal circuit

The throttle position sensor detects the throttle valve opening angle as a control signal, which is input into TERMINALS VTA1 and VTA2 of the engine control module.

(6)Vehicle speed circuit

The vehicle speed sensor detects the vehicle speed, and the signal is input into TERMINAL SPD of the engine control module via the combination meter, from TERMINAL SP1 of the skid control ECU with actuator.

(7)Battery signal circuit

Voltage is constantly applied to TERMINAL BATT of the engine control module. When the ignition SW is turned on, the voltage for engine control module start up power supply is applied through the EFI relay, to TERMINALS +B and +B2 of the engine control module. The current from the IGN fuse flows to TERMINAL IGSW of the engine control module, and voltage is constantly applied to TERMINAL +BM.

(8)Intake air volume signal circuit

The intake air volume is detected by the mass air flow meter, and is input as a control signal to TERMINAL VG of the engine control module.

(9)Stop light SW signal circuit

The stop light SW is used to detect whether the vehicle is braking or not, and the signal is input into TERMINAL STP of the engine control module as a control signal.

(10)Starter signal circuit

To confirm whether the engine is cranking, the voltage applied to the starter motor when the engine is cranking is detected, and is input into TERMINAL STA of the engine control module as a control signal.

(11)Engine knock signal circuit

Engine knocking is detected by the knock sensors, and is input into TERMINALS KNK1 and KNK2 of the engine control module as a control signal.

(12)A/C SW signal system

The operating voltage of the A/C magnetic clutch is detected and input in the form of a control signal to TERMINAL AC1 of the engine control module.

(13)Air fuel ratio signal system

The air fuel ratio is detected by air fuel ratio sensor and input as a control signal into TERMINALS A1A+ and A2A+ of engine control module.

80

4RUNNER (EM00T0U)

2.Control System

SFI system

The SFI system monitors the engine condition through the signals input from each sensors to the engine control module. The control signal is sent to the engine control module TERMINALS #10, #20, #30, #40, #50, #60, #70 and #80 to operate the injector (Fuel injection). The SFI system controls the fuel injection by the engine control module in response to the driving conditions.

ESA system

The ESA system monitors the engine condition through the signals input from each sensors to the engine control module. The best ignition timing is decided according to this data and the data memorized in the engine control module. The control signal is output to TERMINALS IGT1, IGT2, IGT3, IGT4, IGT5, IGT6, IGT7 and IGT8, and these signals control the igniter to provide the best ignition timing.

Heated oxygen sensor heater control system

The heated oxygen sensor heater control system turns the heater on when the intake air volume is low (Temp. of exhaust emission is low), and warms up the heated oxygen sensors to improve their detection performance. The engine control module evaluates the signals from each sensors, and outputs current to TERMINAL HT1B or HT2B to control the heater.

Air fuel ratio sensor heater control system

The air fuel ratio sensor heater control system turns the heater on when the intake air volume is low (Temp. of exhaust emission is low), and warms up the air fuel ratio sensor to improve detection performance of the sensor.

The engine control module evaluates the signals from each sensor, current is output to TERMINALS HA1A and HA2A, controlling the heater.

Fuel pump control system

The engine control module supplies current to TERMINAL FPR, and controls the operation speed of the fuel pump with the FUEL PUMP relay.

ACIS

The ACIS includes a valve in the bulkhead separating the surge tank into two parts. This valve is opened and closed in accordance with the driving conditions to control the intake manifold length in two stages, for increased engine output in all ranges from low to high speeds.

ETCS–i

The ETCS–i controls the engine output at its optimal level in accordance with the opening of the accelerator pedal, under all driving conditions.

Engine start control system

The engine control module allows power to be supplied from the TERMINAL STAR/NSW to the STA relay via park/neutral position SW until complete combustion is confirmed by engine RPM after the detection of ignition SW ST signal by the TERMINAL STSW.

With this arrangement, engine can be started without holding the ignition key in the ST position. At the same time, the TERMINAL ACCR is controlled so that the engine control module turns off ACC CUT relay, shutting off power to the accessories.

VVT–i

Controls the intake camshaft to an optimal valve timing in accordance with the engine condition.Air Injection System

It is the system to improve exhaust control performance by activating catalyst at early stage, which is realized when air is pressed and sent into the exhaust pipe forcibly by the air injection pump at starting engine in cold condition.

3.Diagnosis System

When there is a malfunction in the engine control module signal system, the malfunctioning system is recorded in the memory. The malfunctioning system can be found by reading the code displayed on the malfunction indicator lamp.

4. Fail–Safe System

When a malfunction has occurred in any system, there is a possibility of causing engine trouble due to continued control based on that system. In that case, the fail–safe system either controls the system using the data (Standard values) recorded in the engine control module memory, or else stops the engine.

81

4RUNNER (EM00T0U)

Engine Control for 2UZ–FE

: Parts Location

Code			See Page	Code			See Page	Code			See Page
A12			32 (2UZ–FE)	I3			33 (2UZ–FE)	J33		A	38
A13			32 (2UZ–FE)	I4			33 (2UZ–FE)	J34		B	38
A16		A	36	I5			33 (2UZ–FE)	J35		A	38
A17		B	36	I6			33 (2UZ–FE)	J36		B	38
A24			36	I7			33 (2UZ–FE)	J37			38
A32			36	I8			33 (2UZ–FE)	J40		A	40
A43		A	32 (2UZ–FE)	I9			33 (2UZ–FE)	J41		B	40
A44		B	32 (2UZ–FE)	I10			33 (2UZ–FE)	J47		A	38
A45			32 (2UZ–FE)	I11			33 (2UZ–FE)	J48		B	38
A46			32 (2UZ–FE)	I12			33 (2UZ–FE)	J49		C	38
A47			32 (2UZ–FE)	I13			33 (2UZ–FE)	J50		D	38
C1			32 (2UZ–FE)	I14			33 (2UZ–FE)	J51		E	38
C2			32 (2UZ–FE)	I15			33 (2UZ–FE)	J52		F	38
C3			32 (2UZ–FE)	I16			33 (2UZ–FE)	K1			33 (2UZ–FE)
C4		B	32 (2UZ–FE)	I18			37	K2		B	33 (2UZ–FE)
C8		A	37	J2		A	33 (2UZ–FE)	L4			40
C9		B	37	J3		B	33 (2UZ–FE)	M1		B	33 (2UZ–FE)
C10		C	37	J4			38	P1			33 (2UZ–FE)
D1			37	J5			38	S11			39
E2			32 (2UZ–FE)	J7			38	S12			39
E4		A	37	J8		A	38	S28			33 (2UZ–FE)
E5		B	37	J9		B	38	T2			33 (2UZ–FE)
E6		C	37	J16			38	T8			39
E7		D	37	J18			38	V1		B	33 (2UZ–FE)
E8		E	37	J22		A	38	V2		B	33 (2UZ–FE)
F8			32 (2UZ–FE)	J23		B	38	V3		B	33 (2UZ–FE)
F9			37	J26			38	V4		B	33 (2UZ–FE)
F14			40	J28			38	V12			33 (2UZ–FE)
H6			32 (2UZ–FE)	J29		A	38	V13			33 (2UZ–FE)
H8			32 (2UZ–FE)	J30		B	38	Y1			39
I1			33 (2UZ–FE)	J31		A	38
I2			33 (2UZ–FE)	J32		B	38

:			Relay Blocks
	Code		See Page	Relay Blocks (Relay Block Location)
2			22	Engine Room R/B (Engine Compartment Left)
		: Junction Block and Wire Harness Connector
	Code		See Page	Junction Block and Wire Harness (Connector Location)
	1C		24	Engine Room Main Wire and Driver Side J/B (Lower Finish Panel)
	1D
	1E
	1G
	1J		25	Instrument Panel Wire and Driver Side J/B (Lower Finish Panel)
	1K
	1L
	3C		28	Instrument Panel Wire and Center J/B (Instrument Panel Brace RH)
	3D
	3E

82

4RUNNER (EM00T0U)

: Connector Joining Wire Harness and Wire Harness

	Code	See Page	Joining Wire Harness and Wire Harness (Connector Location)
	EA1	44 (2UZ–FE)	Engine No.2 Wire and Engine Room Main Wire (Under the Engine Room R/B)
	EB1	44 (2UZ–FE)	Engine No.2 Wire and Engine Wire (Near the Starter)
	EB2
	IB1	46	Floor No.2 Wire and Engine Room Main Wire (Left Kick Panel)
	IB2
	IC2	46	Instrument Panel Wire and Engine Room Main Wire (Left Kick Panel)
	IC3
	IC4
	IE1	46	Instrument Panel Wire and Floor No.2 Wire (Left Kick Panel)
	IK1	47	Instrument Panel Wire and Instrument Panel Wire (Left Upper Side of the Glove Box)
	IL1	47	Instrument Panel Wire and Instrument Panel Wire (Right Upper Side of the Glove Box)
	IM1	47	Engine Wire and Instrument Panel Wire (Right Side of Blower Unit)
	IM2
	IN1	47	Instrument Panel Wire and Engine Room Main Wire (Right Kick Panel)

:	Ground Points
Code	See Page	Ground Points Location
EB	44 (2UZ–FE)	Front Left Fender
ED	44 (2UZ–FE)	Left Bank Cylinder Head
EE	44 (2UZ–FE)	Rear Side of Cylinder Block
EQ	44 (2UZ–FE)	Near the Starter
IG	46	Left Kick Panel
IH	46	Instrument Panel Brace LH
IK	46	Right Kick Panel
BL	48	Floor Seat Crossmember LH
BO	48	Rear Pillar LH

83

4RUNNER (EM00T0U)