CHARGING

W

W

FROM POWER SOURCE SYSTEM

FROM POWER SOURCE SYSTEM

(SEE PAGE 66)

(SEE PAGE 66)

7. 5A

15A

5

2B

IGN

ECU±IG

2

2B

5 1D

8

1B

Y

B±R

B±O

C

J 3

JUNCTION

CONNECTOR

C

9

B±R

Y

W

W

C15

W

W

CHARGE WARNING

LIGHT

[COMB. METER]

IG2

15

IG2

16

8

Y

Y

B±R

I 5

Y

3

A

2

A (ALL±TRAC/4WD)

TO RETRACT

2

A

1

A

3

A (ALL±TRAC/4WD)

A15

C

, A16

A

B

CONTROL RELAY

B (2WD)

B (2WD)

ALTERNATOR

2

B

6

(CANADA)

3

B

2

B

1

1

C

IG

L

S

B

40AAM1

100AALT

F10

A

B

FUSE BOX

4

A

(ALL±TRAC/4WD)

1

B

(2WD)

B

IC REGULATOR

FL MAIN

2. 0L

BATTERY

78

SERVICE HINTS

A15(C), A16(A) (B) ALTERNATOR

(C) 1±GROUND: 13.9±15.1 VOLTS WITH ENGINE RUNNING AT 2000 RPM AND 25°C (77°F) 13.5±14.3 VOLTS WITH ENGINE RUNNING AT 2000 RPM AND 115°C (239°F)

(A) 1, (B) 2 ±GROUND : 0±4 VOLTS WITH IGNITION SW AT ON POSITION AND ENGINE NOT RUNNING

: PARTS LOCATION

CODE

SEE PAGE

CODE

SEE PAGE

CODE

SEE PAGE

A15

C

28 (3S±GTE), 30 (5S±FE)

A16

B

30 (5S±FE), 31 (4A±FE)

F10

B

30 (5S±FE), 31 (4A±FE)

C

31 (4A±FE)

C15

32

J 3

33

A16

A

28 (3S±GTE)

F10

A

28 (3S±GTE)

: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR

CODE

SEE PAGE

JUNCTION BLOCK AND WIRE HARNESS (CONNECTOR LOCATION)

1B

20

COWL WIRE AND J/B NO. 1 (LEFT KICK PANEL)

1D

22 (2WD)

2B

23

ENGINE WIRE AND J/B NO. 2 (NEAR THE BATTERY)

(ALL±TRAC/4WD)

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS

CODE

SEE PAGE

JOINING WIRE HARNESS AND WIRE HARNESS (CONNECTOR LOCATION)

IG2

44

ENGINE WIRE AND COWL WIRE (UNDER THE ENGINE ECU))

: SPLICE POINTS

CODE

SEE PAGE

WIRE HARNESS WITH SPLICE POINTS

CODE

SEE PAGE

WIRE HARNESS WITH SPLICE POINTS

I 5

46

COWL WIRE

A15

C

(ALL±TRAC/4WD) A16

A BLACK

(2WD) A16 B

BLACK

C15

GRAY

1

1

2

1

X 8

9

3

2

3

(ALL±TRAC/4WD) F10	A BLACK	(2WD) F10	B	BLACK	J 3
		1	2		C	C	C
	2			6	C	C	C
		X	X	X	(HINT : SEE PAGE 7)
3	4
	X

79

ENGINE CONTROL (3S±GTE)

SYSTEM OUTLINE

THE ENGINE CONTROL SYSTEM UTILIZES A MICROCOMPUTER AND MAINTAINS OVERALL CONTROL OF THE ENGINE AN OUTLINE

OF ENGINE CONTROL IS GIVEN HERE.

1.INPUT SIGNALS

(1)WATER TEMP. SIGNAL SYSTEM

THE WATER TEMP. SENSOR DETECTS THE ENGINE COOLANT TEMP. AND HAS A BUILT±IN THERMISTOR WITH A RESISTANCE

WHICH VARIES ACCORDING TO THE WATER TEMP. THUS THE WATER TEMP. IS INPUT IN THE FORM OF A CONTROL SIGNAL TO

TERMINAL THW OF THE ECU.

(2)INTAKE AIR TEMP. SIGNAL SYSTEM

THE INTAKE AIR TEMP. SENSOR IS INSTALLED INSIDE THE AIR FLOW METER AND DETECTS THE INTAKE AIR TEMP. WHICH IS

INPUT AS A CONTROL SIGNAL TO TERMINAL THA OF THE ECU.

(3)OXYGEN SENSOR SIGNAL SYSTEM

THE OXYGEN DENSITY IN THE EXHAUST EMISSIONS IS DETECTED AND INPUT AS A CONTROL SIGNAL TO TERMINAL OX1 OF ECU. TO MAINTAIN STABLE DETECTION PERFORMANCE BY THE OXYGEN SENSOR, A HEATER IS USED FOR WARMING THE SENSOR. THE HEATER IS ALSO CONTROLLED BY THE ECU (HT).

(4)RPM SIGNAL SYSTEM

CRANKSHAFT POSITION IS DETECTED BY THE PICK±UP COIL INSTALLED INSIDE THE DISTRIBUTOR. CRANKSHAFT POSITION IS INPUT AS A CONTROL SIGNAL TO TERMINALS G1 AND G2 OF THE ECU, AND RPM IS INPUT TO TERMINAL NE.

(5)THROTTLE SIGNAL SYSTEM

THE THROTTLE POSITION SENSOR DETECTS THE THROTTLE VALVE OPENING ANGLE WHICH IS INPUT AS A CONTROL SIGNAL TO TERMINAL VTA OF THE ECU, OR WHEN THE VALVE IS FULLY CLOSED, TO TERMINAL IDL.

(6)VEHICLE SPEED SIGNAL SYSTEM

THE SPEED SENSOR, INSTALLED INSIDE THE COMBINATION METER, DETECTS THE VEHICLE SPEED AND INPUTS A CONTROL SIGNAL TO TERMINAL SPD OF THE ECU.

(7)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 AC OF THE ECU.

(8)BATTERY SIGNAL SYSTEM

VOLTAGE IS CONSTANTLY APPLIED TO TERMINAL BATT OF THE ECU. WHEN THE IGNITION SW IS TURNED TO ON, VOLTAGE

FOR ECU OPERATION IS APPLIED VIA THE EFI MAIN RELAY TO TERMINALS +B AND B1 OF THE ECU.

(9)INTAKE AIR VOLUME SIGNAL SYSTEM

INTAKE AIR VOLUME IS DETECTED BY THE POTENTIOMETER INSTALLED INSIDE THE AIR FLOW METER AND IS INPUT AS A CONTROL SIGNAL TO TERMINAL VS OF THE ECU.

(10)STOP LIGHT SW SIGNAL SYSTEM

THE STOP LIGHT SW IS USED TO DETECT WHETHER OR NOT THE VEHICLE IS BRAKING AND THE INFORMATION IS INPUT AS A

CONTROL SIGNAL TO TERMINAL STP OF THE ECU.

(11)STA SIGNAL SYSTEM

TO CONFIRM THAT THE ENGINE IS CRANKING, THE VOLTAGE APPLIED TO THE STARTER MOTOR DURING CRANKING IS

DETECTED AND IS INPUT AS A CONTROL SIGNAL TO TERMINAL STA OF THE ECU.

(12)ENGINE KNOCK CONTROL SYSTEM

ENGINE KNOCKING IS DETECTED BY THE KNOCK SENSOR AND INPUT AS A CONTROL SIGNAL TO TERMINAL KNK OF THE

ECU.

(13)ELECTRICAL IDLE±UP SYSTEM

THE SIGNAL WHEN SYSTEMS SUCH AS THE REAR WINDOW DEFOGGER, HEADLIGHTS, ETC. WHICH CAUSE A HIGH ELECTRICAL BURDEN ARE ON IS INPUT TO TERMINAL ELS AS A CONTROL SIGNAL.

2.CONTROL SYSTEM

*EFI (ELECTRONIC FUEL INJECTION) SYSTEM

THE EFI SYSTEM MONITORS THE ENGINE CONDITIONS THROUGH THE SIGNALS EACH SENSOR (INPUT SIGNALS (1) TO (12)) INPUTS TO THE ECU. BASED ON THIS DATA AND THE PROGRAM MEMORIZED IN THE ECU. THE MOST APPROPRIATE FUEL INJECTION TIMING IS DECIDED AND CURRENT IS OUTPUT TO TERMINALS #1, #2, #3 AND #4 OF THE ECU. CAUSING THE INJECTORS TO OPERATE (TO INJECT FUEL). IT IS THIS SYSTEM. WHICH THROUGH THE WORK OF THE ECU. FINELY CONTROLS FUEL INJECTION IN RESPONSE TO DRIVING CONDITIONS.

*ESA (ELECTRONIC SPARK ADVANCE) SYSTEM

THE ESA SYSTEM MONITORS THE ENGINE CONDITIONS THROUGH THE SIGNALS (INPUT SIGNALS (1, 3, 4, 6, 7, 9, 11) INPUT TO THE ECU FROM EACH SENSOR. BASED ON THIS DATA AND THE PROGRAM MEMORIZED IN THE ECU. THE MOST APPROPRIATE

INJECTION TIMING IS DECIDED AND CURRENT IS OUTPUT TO TERMINAL IGT OF THE ECU. THIS OUTPUT CONTROLS THE IGNITER TO PRODUCE THE MOST APPROPRIATE IGNITION TIMING FOR THE DRIVING CONDITIONS.

80

*FUEL PUMP CONTROL SYSTEM

COMPUTER OPERATION OUTPUTS TO TERMINAL FPR AND CONTROLS THE FUEL PUMP CONTROL RELAY AND THUS CONTROLS THE FUEL PUMP DRIVE SPEED IN RESPONSE TO CONDITIONS.

*OXYGEN SENSOR HEATER CONTROL SYSTEM

THE OXYGEN SENSOR HEATER CONTROL SYTERM TURNS THE HEATER TO ON WHEN THE INTAKE AIR VOLUME IS LOW (TEMP. OF EXHAUST EMISSIONS LOW). AND WARMS UP THE OXYGEN SENSOR TO IMPROVE DETECTION PERFORMANCE OF THE

SENSOR. THE ECU EVALUATES THE SIGNALS FROM EACH SENSOR (INPUT SIGNALS (1, 6, 8, 9, 11)), CURRENT IS OUTPUT TO

TERMINAL HT AND CONTROLS THE HEATER.

*ISC (IDLE SPEED CONTROL) SYSTEM

THE ISC SYSTEM (ROTARY SOLENOID TYPE) INCREASES THE RPM AND PRVIDES IDLING STABILITY FOR FAST IDLE±UP WHEN THE ENGINE IS COLD AND WHEN THE IDLE SPEED HAS DROPPED DUE TO ELECTRICAL LOAD, ETC. THE ECU EVALUATES THE SIGNALS FROM EACH SENSOR (INPUT SIGNALS (1, 4 TO 8, 11, 13)), OUTPUTS CURRENT TO TERMINALS ISC1 AND ISC2 AND

CONTROLS THE ISC VALVE.

*EGR CONTROL SYSTEM

WITH THE EGR CONTROL SYSTEM, THE ECU EVALUATES THE (INPUT SIGNALS (1, 4, 10)), FROM EACH SENSOR, CURRENT IS

OUTPUT TO TERMINAL EGR AND OPERATION OF THE EGR VALVE IS CONTROLLED.

*INTAKE AIR CONTROL SYSTEM

IN THE INTAKE AIR CONTROL SYSTEM, EACH CYLINDER IN THE INTAKE MANIFOLD IS DIVIDED INTO TWO PARTS, WITH AN INTAKE AIR CONTROL VALVE INSTALLED IN THE PASSAGE ON ONE SIDE. THE OPENING AND CLOSING OF THE VALVE PROVLDES THE MOST APPROPRIATE INTAKE AIR FLOW AND, AS WELL AS PREVENTING PERFORMANCE LOSS AT LOW SPEEDS, ALSO IMPROVES FUEL ECONOMY. THE ECU EVALUATES THE SIGNALS FROM EACH SENSOR (INPUT SIGNALS (1, 4, 5)), OUTPUTS CURRENT TO TERMINAL TVIS CONTROLS THE VSV (FOR T±VIS) AND, CARRIES OUT OPENING AND CLOSING OF THE VALVE.

3. DIAGNOSIS SYSTEM

WITH THE DIAGNOSIS SYSTEM, WHEN THERE IS A MALFUNCTION IN THE ECU SIGNAL SYSTEM, THE MALFUNCTIONING SYSTEM

IS RECORDED IN THE MEMORY. THE MALFUNCTIONING SYSTEM CAN THEN BE FOUND BY READING THE DISPLAY (CODE) OF THE CHECK ENGINE WARNING LIGHT.

4. FAIL±SAFE SYSTEM

WHEN A MALFUNCTION OCCURS IN ANY SYSTEM, IF THERE IS A POSSIBILITY OF ENGINE TROUBLE BEING CAUSED BY CONTINUED CONTROL BASED ON THE SIGNALS FROM THAT SYSTEM. THE FAIL±SAFE SYSTEM EITHER CONTROLS THE SYSTEM

BY USING DATA (STANDARD VALUES) RECORDED IN THE ECU MEMORY OR ELSE STOPS THE ENGINE.

81

ENGINE CONTROL (3S±GTE)

W

10 IE1

W

5 2E

2 2B

W

2

40A AM1

W	4 AM1

	10	AM2
	B±R	I12
		IGNITION SW
17	IE1

B±R

6 2E

ST1	7	B±W
IG2	9	B±O	USA: CANADA:
			I 8 I 9
	1	EB1

B±O

E 7

B±O

E10

2 EFI RESISTOR

	3	2B
					3		6		4
	B±R			1	B±O	2	B±O	3	B±O
				INJECTOR NO.	2	I 8 INJECTOR NO.	2	I 9 INJECTOR NO.	2
	7		I 7		1		1		1
100A ALT	30A AM2		F10 FUSE BOX
4					R		G		Y
B
	FL MAIN
	2. 0L

BATTERY

B±O

B

B±Y

B±W

B±W

4

4

1

2

L±O

STARTER

5

RELAY

18

IE2

FUEL PUMP

1

CONTROL RELAY

3

4

4

4

B

B

B

B±Y

L±O

2

4

3

2

EB1

5

5

5

STARTCLUTCHSW

B

B

F17

PUMPFUEL

RESISTOR

L±W

L±B

G±R

IG2

2

20

B

I 6

TO

3

2

1

L±B

C10

CIRCUIT

OPENING

E 3

RELAY

6

4

1

L±B

W±B

19

IE2

20

IE2

1

2

3B

L±B

G±R

B±O

I 2 : USA

L±B

I 1 : CANADA

4

2

J/B

NO.

NO. 3

L±B

I10

INJECTOR

W±B

G

15

IF1

1

L±B

4

1E

12

BP1

4

1A

L±B

1

F18

W±B

FUEL PUMP

M

L

2

5

IG2

W±B

G±R

G

L

Y

G

R

W±B

BL

82

B±O

B

B±Y

L±B

19 IG2

L±B

G±R

G

L

Y

G

R

W±B

B±O

B

B±Y

L±B

B±Y

FROM POWER SOURCE SYSTEM (SEE PAGE 66)

P

7. 5A

15A

15A

15A

15A

IGN

EFI

STOP

TAIL

GAUGE

7

1H

1

5

1E

J/B

4

2C

7

1B

DIODE

NO. 3

B±O

R±L

G±R

P

2

8

2E

2

9

3B

3

4

S10

R±L

P

STOP

3

LIGHT SW

7

A

EFI

1

1D

6

1D

MAIN

C13

B

, C14

A

RELAY

G±W

R±Y

CHECK ENGINE

1

[COMB. METER]

1

2

C

3

B

J 2

5

2A

10

2C

7

IG2

SW

JUNCTION

P

W±B

B±Y

P

G±W

CONNECTOR

FROM DEFOGGER

O

P

C

I 6

1

A

4

A

2

A

5

A

BATT

STP

ELS

W

E 6

B

, E 7

C

E 8

A

ENGINE ECU

FPR

FC

# 4

# 3

# 2

# 1

SPD

ACT

ATS

AC

STJ

6 A 14 A 24 B 25 B 11 B 12 B

9 A

21 A

7 A

10 A

7 B

G±R

G

L

Y

G

R

JUNCTION CONNECTOR

L±W

LG±B

L±Y

B±W

G

2J

B

3

IJ1

1

Y

4

B±W

G

IG2

IG1

E 7

B

L±W

6

2C

4

ES2

AC14

SPEEDSENSOR

[COMB.METER]

6

G±Y

1

IH1

B±W

11

2

1

G

G

2D

L±Y

5

A/CTOMAGNETIC

STARTFROMINJECTOR SWTIME

TOCOLD START

BR

A17

CLUTCHRELAY

INJECTOR

A/C

AMPLIFIER

A

J 6

A

JUNCTION

CONNECTOR

(FOR EARTH)

EB

ID

83

ENGINE CONTROL (3S±GTE)

B±O

E 9

B±O

B

B±O

B±Y

B±Y

B±Y

L±B

L±B

B±Y

B±Y

P

P

B±Y

I 7

W±L

18

IG2

B±Y

B±Y

B±Y

I 5

TACHOMETER

IGNITION

COIL

I 6

E 5

B±Y

E 7

1

2

W±L

B±Y

B±O

W±L

TO

B±Y

B±Y

B±Y

B±Y

E 9

W±L

B±O

V 1 VSV (FOR EGR SYSTEM)

CHARGING PRESSURE)

B

2

V 5 VSV (FORT±VIS)

2

2

2

5

3

4

ISC VALVE

VSV (FOR TURBO

D 1

+B2

+B

TAC

I 4

DISTRIBUTOR

IGNITER

G2

G±

NE

G1

IGT

IGF

1

I 3

1

1

3

4

1

2

2

1

3

1

V 4

B±Y

B±Y

LG

G±W

G±B

G±R

L±R

B

L

B

Y

R

W

B±Y

(SHIELDED)

12 A 13 A

1 B

9 B 10 B

6 B

2 B

11 A

5 B 17 B

4 B 18 B

20 B

3 B

+B

+B1

TVIS

RSC

RSO

EGR

TPC

STA

G2

G±

NE

G1

IGT

IGF

E 6 B , E 7 C , E 8 A

ENGINE ECU

VTA

IDL

VC

PIM

THW

E2

THG

11 C 12 C

1 C

5 C

4 C

9 C

10 C

P±B

P

P±L

R

BR

L

P±L

E 7

R±W

5

ES2

P±L

R

I 7

P±L

E 9

I 7

R±W

EGR GAS TEMP. SENSOR (FOR CALIFORNIA)

L

2

(EX. CALIFORNIA)

P±L

P±B

P±L

R±W

E 2

2

2

P

EFI WATER

PRESSURE SENSOR

TEMP.

SHORT PIN

4

3

2

TURBO CHARGING

3

2

SENSOR

VC

PIM

TO BOOST METER

1

E 3

P

BR

1

1

BR

E

1

1

2

ES2

T 1

BR

P±L

T3

BR

METER][COMB.

BR

BR

E3

BR

THROTTLE POSITION

E 5

TO CRUISE

SENSOR

CONTROL ECU

BR

BR

E 9

E 7

E 5

BR

BR

P±L

84

B±Y
L±B
B±Y
P
W±L
2	IG2
P		W±L		B±Y	L±B	BR		B±Y	BR
	2	18		8	1	3		2	4
	W	IG±		+B	FP	E1	C 1	HTRB		E
							CHECK
	VF		TE1	OX2		TE2	CONNECTOR	HTR		+
	9		6	4		7		1	3
V±Y		O			LG		W	P±B	I 7
									W
									W
8	C	15	C		14	C		8 B	6	C
	VF		TE1			TE2		HT	OX
						E 6 B , E 7 C , E 8 A

ENGINE ECU

THA	VS	EO2	EO1	E1
3 C	2 C	26 B	13 B	14 B
GR	GR±B	W±B	W±B	BR

	7	6
	THA	VS	A42
			AIR FLOW
			METER
5	E2	VC	4

		I 7
	P±L	BR
BR		E 5
		BR
		EC

O 8

OXYGEN SENSOR

(SHIELDED)

(SHEILDED)

I 7

BR

KNK	(SHIELDED)
13 C	BR	BR

(SHIELDED)

E 5

BR

W

1

K 1

KNOCK

SENSOR

BR

BR

BR

85

ENGINE CONTROL (3S±GTE)

SERVICE HINTS

EFI MAIN RELAY

4±2 : CLOSED WITH IGNITION SW AT ON OR ST POSITION

E10 EFI RESISTOR

2±1, 3, 4, 5 : 5±7 Ω

I 7, I 8, I 9, I10 INJECTOR

1±2 : 2±4 Ω

F17 FUEL PUMP RESISTOR

1±2: APPROX. 73 Ω

A42 AIR FLOW METER

1±2 : CLOSED WITH STARTER RUNNING OR MEASURING PLATE OPEN 5±6 : 200±600 Ω (MEASURING PLATE CLOSED)

20±1000 Ω (MEASURING PLATE OPEN) 5±4 : 200±400 Ω

5±7 : 10±20 K (±20°C, ±4°F)

4±7 KΩ (0°C, 32°F)

2±3 KΩ (20°C, 68°F) 0.9±1.3 KΩ (40°C, 104°F) 0.4±0.7 KΩ (60°C, 140°F)

E 2 EFI WATER TEMP. SENSOR

1±2: 10±20 KΩ (±20°C, ±4°F)

4±7 KΩ (0°C, 32°F)

2±7 KΩ (20°C, 68°F) 0.9±1.3 KΩ (40°C, 104°F) 0.4±0.7 KΩ (60°C, 140°F) 0.2±0.4 KΩ (80°C, 176°F)

T 1 THROTTLE POSITION SENSOR

2±4: 0.2±0.8 KΩ WITH CLEARANCE BETWEEN LEVER AND STOP SCREW 0 MM (0 IN)

3±4: LESS THAN 2.3 KΩ WITH CLEARANCE BETWEEN LEVER AND STOP SCREW 0.50 MM (0.020 IN)Ω WITH 0.7 MM (0.028 IN.)

2±4: 3.3±10 KΩ WITH THROTTLE VALVE FULLY OPEN 1±4: 3±8 KΩ

E 6, E 7, E 8 ENGINE ECU VOLTAGE AT ECU CONNECTORS

BATT±E1	: 10±14 VOLTS
+B, +B1±E1	: 10±14 VOLTS (IGNITION SW ON)
IDL±E2	: 4±6 VOLTS (IGNITION SW ON AND THROTTLE VALVE OPEN)
VTA±E2	:	0.1±1.0 VOLTS (IGNITION SW ON AND THROTTLE VALVE FULLY CLOSED)
		3±6 VOLTS (IGNITION SW ON AND THROTTLE VALVE OPEN)
VC±E2	: 4±6 VOLTS (IGNITION SW ON)
VS±E2	: 4±6 VOLTS (IGNITION SW ON AND MEASURING PLATE FULLY CLOSED)
		1.0 VOLTS OR LESS (IGNITION SW ON AND MEASURING PLATE FULLY OPEN)
		2.0±4.0 VOLTS (IDLING)
		1.0±2.0 VOLTS (3000 RPM)
THA±E2	: 1.0±3.0 VOLTS (IGNITION SW ON AND INTAKE AIR TEMP. 20°C, (68°F))
THW±E2	: 0.1±1.0 VOLTS (IGNITION SW ON AND COOLANT TEMP. 80°C, (176°F))
STA±E1	: 6±14 VOLTS (CRANKING)
#1, #2, #3, #4 ± E01, E02	: 10±14 VOLTS (IGNITION SW ON)
IGT±E1	: 0.7±1.0 VOLTS (CRANKING OR IDLING)
TVIS±E1	: 2.0 VOLTS OR LESS WITH IGNITION SW ON AND THROTTLE VALVE FULLY CLOSED
		10±14 VOLTS WITH IGNITION SW ON AND THROTTLE VALVE OPEN
		2.0 VOLTS OR LESS IDLING
		10±14 VOLTS WITH 4200 RPM OR MORE
T±E1	: 10±14 VOLTS WITH IGNITION SW ON AND CHECK CONNECTOR T±E1 NO CONNECT
		0.5 VOLTS OR LESS WITH IGNITION SW ON AND CHECK CONNECTOR T±E1 CONNECT
AC±E1	: 8±14 VOLTS WITH IGNITION SW ON A/C SWITCH ON
RSC, RSO ±E1	: 9±14 VOLTS (IGNITION SW ON)
PIM±E2	: 2.5±4.5 VOLTS (IGNITION SW ON)
W±E1	: 10±14 VOLTS (NO TROUBLE (CHECK ENGINE WARNING LIGHT OFF) AND ENGINE RUNNING)

RESISTANCE AT ECU CONNECTORS (DISCONNECT WIRING CONNECTOR FROM ECU)

IDL±E1	: INFINITY (THROTTLE VALVE OPEN)
		LESS THAN 2300 Ω (THROTTLE VALVE FULLY CLOSED)
VTA±E2	: 3300±10000 Ω (THROTTLE VALVE OPEN)
		200±800 Ω (THROTTLE VALVE FULLY CLOSED)
VS±E2	: 200±600 Ω (MEASURING PLATE FULLY CLOSED)
		20±1200 Ω (MEASURING PLATE FULLY OPEN)
THA±E2	: 2000±3000 Ω (INTAKE AIR TEMP. 20°C, 68°F)
THW±E2	: 200±400 Ω (COOLANT TEMP. 80°C, 176°F)
G1,G2±G±	:	140±180 Ω
NE±G±	:	180±220 Ω
RSO, RSC±+B, +B1	:	17.7±23.9 Ω

86

: PARTS LOCATION

CODE

SEE PAGE

CODE

SEE PAGE

CODE

SEE PAGE

A17

32

E10

28 (3S±GTE)

J 2

33

A42

28 (3S±GTE)

F10

28 (3S±GTE)

J 6

33

C 1

28 (3S±GTE)

F17

28 (3S±GTE)

K 1

33

C10

32

F18

34

O 8

29 (3S±GTE)

C13

B

32

I 3

29 (3S±GTE)

S10

33

C14

A

32

I 4

29 (3S±GTE)

T 1

29 (3S±GTE)

D

1

28 (3S±GTE)

I 5

29 (3S±GTE)

T 3

29 (3S±GTE)

E 2

28 (3S±GTE)

I 7

29 (3S±GTE)

V 1

29 (3S±GTE)

E 3

28 (3S±GTE)

I 8

29 (3S±GTE)

V 4

29 (3S±GTE)

E 6

B

33

I 9

29 (3S±GTE)

V 5

29 (3S±GTE)

E 7

C

33

I10

29 (3S±GTE)

E 8

A

33

I12

33

: RELAY BLOCKS

CODE

SEE PAGE

RELAY BLOCKS (RELAY BLOCK LOCATION)

4

27

R/B NO. 4 (RIGHT KICK PANEL)

5

27

R/B NO. 5 (ENGINE COMPARTMENT FRONT RIGHT)

: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR

CODE

SEE PAGE

JUNCTION BLOCK AND WIRE HARNESS (CONNECTOR LOCATION)

1A

1B

20

COWL WIRE AND J/B NO. 1 (LEFT KICK PANEL)

1D

1E

1H

20

ENGINE ROOM MAIN WIRE AND J/B NO. 1 (LEFT KICK PANEL)

2A

23

ENGINE ROOM MAIN WIRE AND J/B NO. 2 (NEAR THE BATTERY)

(ALL±TRAC/4WD)

2B

23

ENGINE WIRE AND J/B NO. 2 (NEAR THE BATTERY)

2C

(ALL±TRAC/4WD)

2D

23

ENGINE ROOM MAIN WIRE AND J/B NO. 2 (NEAR THE BATTERY)

2E

(ALL±TRAC/4WD)

3B

25

COWL WIRE AND J/B NO. 3 (BEHIND COMBINATION METER)

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS

CODE

SEE PAGE

JOINING WIRE HARNESS AND WIRE HARNESS (CONNECTOR LOCATION)

EB1

38

(3S±GTE)

ENGINE WIRE AND COWL WIRE (REAR SIDE OF RIGHT FRONT FENDER)

ES2

38

(3S±GTE)

ENGINE WIRE AND ENGINE ROOM NO. 2 WIRE (NEAR THE DISTRIBUTOR)

IE1

44

ENGINE ROOM MAIN WIRE AND COWL WIRE (LEFT KICK PANEL)

IE2

IF1

44

FLOOR WIRE AND COWL WIRE (LEFT KICK PANEL)

IG1

44

ENGINE WIRE AND COWL WIRE (UNDER THE ENGINE ECU)

IG2

IH1

44

ENGINE WIRE AND A/C NO. 1 WIRE (BEHIND THE GLOVE BOX)

IJ1

46

COWL WIRE AND A/C NO. 1 WIRE (BEHIND THE GLOVE BOX)

BP1

48

(L/B)

FLOOR WIRE AND LUGGAGE ROOM WIRE (LEFT QUARTER PANEL CENTER)

: GROUND POINTS

CODE

SEE PAGE

GROUND POINTS LOCATION

EB

38

(3S±GTE)

FRONT LEFT FENDER

EC

38

(3S±GTE)

INTAKE MANIFOLD

ID

44

LEFT KICK PANEL

BL

48

(L/B)

BACK PANEL CENTER

: SPLICE POINTS

CODE

SEE PAGE

WIRE HARNESS WITH SPLICE POINTS

CODE

SEE PAGE

WIRE HARNESS WITH SPLICE POINTS

E 3

38

(3S±GTE)

ENGINE ROOM MAIN WIRE

I 2

46

COWL WIRE

E 5

I 6

E 7

38

(3S±GTE)

ENGINE WIRE

I 7

46

ENGINE WIRE

E 9

I 8

46

COWL WIRE

I 1

46

COWL WIRE

I 9

46

87

ENGINE CONTROL (3S±GTE)

88

89

ENGINE CONTROL (5S±FE)

SYSTEM OUTLINE

THE ENGINE CONTROL SYSTEM UTILIZES A MICROCOMPUTER AND MAINTAINS OVERALL CONTROL OF THE ENGINE,

TRANSMISSION, ETC. AN OUTLINE OF ENGINE CONTROL IS GIVEN HERE.

1.INPUT SIGNALS

(1)WATER TEMP. SIGNAL SYSTEM

THE WATER TEMP. SENSOR DETECTS THE ENGINE COOLANT TEMP. AND HAS A BUILT±IN THERMISTOR WITH A RESISTANCE

WHICH VARIES ACCORDING TO THE WATER TEMP. THUS THE WATER TEMP. IS INPUT IN THE FORM OF A CONTROL SIGNAL TO

TERMINAL THW OF THE ECU.

(2)INTAKE AIR TEMP. SIGNAL SYSTEM

THE INTAKE AIR TEMP. SENSOR IS DETECTS THE INTAKE AIR TEMP., WHICH IS INPUT AS A CONTROL SIGNAL TO TERMINAL THA OF THE ECU.

(3)OXYGEN SENSOR SIGNAL SYSTEM

THE OXYGEN DENSITY IN THE EXHAUST EMISSIONS IS DETECTED AND INPUT AS A CONTROL SIGNAL TO TERMINAL OX1 AND

OX2 (CALIFORNIA) OF THE ECU.

(4)RPM SIGNAL SYSTEM

CRANKSHAFT POSITION AND ENGINE RPM ARE DETECTED BY THE PICK±UP COIL INSTALLED INSIDE THE DISTRIBUTOR.

CRANKSHAFT POSITION IS INPUT AS A CONTROL SIGNAL TO TERMINAL G+ OF THE ECU, AND RPM IS INPUT TO TERMINAL NE+.

(5)THROTTLE SIGNAL SYSTEM

THE THROTTLE POSITION SENSOR DETECTS THE THROTTLE VALVE OPENING ANGLE, WHICH IS INPUT AS A CONTROL

SIGNAL TO TERMINAL PSW OF THE ECU, OR WHEN THE VALVE IS FULLY CLOSED, TO TERMINAL IDL.

(6)VEHICLE SPEED SIGNAL SYSTEM

THE SPEED SENSOR, INSTALLED INSIDE THE COMBINATION METER, DETECTS THE VEHICLE SPEED AND INPUTS A CONTROL

SIGNAL TO TERMINAL SPD OF THE ECU.

(7)NEUTRAL START SW SIGNAL SYSTEM

THE NEUTRAL START SW DETECTS WHETHER THE SHIFT POSITION IS IN NEUTRAL OR NOT, AND INPUTS A CONTROL SIGNAL

TO TERMINAL NSW OF THE ECU.

(8)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 ACT OF THE ECU, AND OPERATION A/C IDLE±UP VSV IS DETECTED AND INPUT IN THE FORM OF A CONTROL SIGNAL TO TERMINAL ACA OF THE ECU.

(9)BATTERY SIGNAL SYSTEM

VOLTAGE IS CONSTANTLY APPLIED TO TERMINAL BATT OF THE ECU. WHEN THE IGNITION SW IS TURNED TO ON, VOLTAGE FOR ECU OPERATION IS APPLIED VIA THE EFI MAIN RELAY TO TERMINALS +B AND +B1 OF THE ECU.

(10)INTAKE AIR VOLUME SIGNAL SYSTEM

INTAKE AIR VOLUME IS DETECTED BY THE VACUUM SENSOR AND IS INPUT AS A CONTROL SIGNAL TO TERMINAL PIM OF THE ECU.

(11)STA SIGNAL SYSTEM

TO CONFIRM THAT THE ENGINE IS CRANKING, THE VOLTAGE APPLIED TO THE STARTER MOTOR DURING CRANKING IS DETECTED AND IS INPUT AS A CONTROL SIGNAL TO TERMINAL STA OF THE ECU.

(12)ELECTRICAL LOAD SIGNAL SYSTEM

THE SIGNAL WHEN SYSTEMS SUCH AS THE REAR WINDOW DEFOGGER, HEADLIGHTS, ETC. WHICH CAUSE A HIGH ELECTRICAL BURDEN ARE ON IS INPUT TO TERMINAL ELS AS A CONTROL SIGNAL.

2.CONTROL SYSTEM

*EFI (ELECTRONIC FUEL INJECTION) SYSTEM

THE EFI SYSTEM MONITORS THE ENGINE CONDITIONS THROUGH THE SIGNALS EACH SENSOR (INPUT SIGNALS (1) TO (12)) INPUTS TO THE ECU. BASED ON THIS DATA AND THE PROGRAM MEMORIZED IN THE ECU, THE MOST APPROPRIATE FUEL

INJECTION TIMING IS DECIDED AND CURRENT IS OUTPUT TO TERMINALS #10 AND #20 OF THE ECU, CAUSING THE INJECTORS

TO OPERATE (TO INJECT FUEL). IT IS THIS SYSTEM WHICH, THROUGH THE WORK OF THE ECU, FINELY CONTROLS FUEL INJECTION IN RESPONSE TO DRIVING CONDITIONS.

DURING ENGINE CRANKING (SIGNAL INPUT TO TERMINAL STA) OR FOR APPROX. 2 SECONDS AFTER NE SIGNAL INPUT, ECU OPERATION ENERGIZES (POINT CLOSED) THE FUEL PUMP CIRCUIT INSIDE THE CIRCUIT OPENING RELAY, CAUSING THE FUEL

PUMP TO OPERATE.

*ESA (ELECTRONIC SPARK ADVANCE) SYSTEM

THE ESA SYSTEM MONITORS THE ENGINE CONDITIONS USING THE SIGNALS (INPUT SIGNALS (1, 4, 5, 10, 11)) INPUT TO THE ECU

FROM EACH SENSOR. BASED ON THIS DATA AND THE PROGRAM MEMORIZED IN THE ECU, THE MOST APPROPRIATE IGNITION TIMING IS DECIDED AND CURRENT IS OUTPUT TO TERMINAL IGT OF THE ECU. THIS OUTPUT CONTROLS THE IGNITER TO

PRODUCE THE MOST APPROPRIATE IGNITION TIMING FOR THE DRIVING CONDITIONS.

90

*ISC (IDLE AIR CONTROL) SYSTEM

THE ISC SYSTEM (ROTARY SOLENOID TYPE) INCREASES THE RPM AND PROVIDES IDLING STABILITY FOR FAST IDLE±UP WHEN THE ENGINE IS COLD AND WHEN THE IDLE SPEED HAS DROPPED DUE TO ELECTRICAL LOAD, ETC. THE ECU EVALUATES THE

SIGNALS FROM EACH SENSOR (INPUT SIGNALS (1, 4 TO 8, 11, 12)), OUTPUTS CURRENT TO TERMINAL ISCC AND ISCO, AND

CONTROLS THE ISC VALVE.

*EGR CONTROL SYSTEM

THE EGR CUT CONTROL SYSTEM CONTROLS THE VSV (FOR EGR) BY EVALUATING THE SIGNALS FROM EACH SENSOR INPUT TO

THE ECU (INPUT SIGNALS (1, 5, 6, 9)) AND BY SENDING OUTPUT TO TERMINAL EGR OF THE ECU.

*A/C CUT CONTROL SYSTEM

WHEN THE VEHICLE SUDDENLY ACCELERATES FROM LOW ENGINE SPEED, THIS SYSTEM CUTS OFF AIR CONDITIONER OPERATION FOR A FIXED PERIOD OF TIME IN RESPONSE TO THE VEHICLE SPEED AND THROTTLE VALVE OPENING ANGLE IN ORDER TO MAINTAIN ACCELERATION PERFORMANCE.

THE ECU RECEIVES INPUT SIGNALS (5, 6), AND OUTPUTS SIGNALS TO TERMINAL ACT.

3. DIAGNOSIS SYSTEM

WITH THE DIAGNOSIS SYSTEM, WHEN THERE IS A MALFUNCTIONING IN THE ECU SIGNAL SYSTEM, THE MALFUNCTION SYSTEM IS RECORDED IN THE MEMORY. THE MALFUNCTIONING SYSTEM CAN THEN BE FOUND BY READING THE DISPLAY (CODE) OF THE CHECK ENGINE WARNING LIGHT.

4. FAIL±SAFE SYSTEM

WHEN A MALFUNCTION OCCURS IN ANY SYSTEM, IF THERE IS A POSSIBILITY OF ENGINE TROUBLE BEING CAUSED BY

CONTINUED CONTROL BASED ON THE SIGNALS FROM THAT SYSTEM, THE FAIL±SAFE SYSTEM EITHER CONTROLS THE SYSTEM

BY USING DATA (STANDARD VALUES) RECORDED IN THE ECU MEMORY OR ELSE STOPS THE ENGINE.

91

ENGINE CONTROL (5S±FE A/T)

			W	4	AM1	ST1 7
			B±R	10	AM2	IG2 9
					I12		B±O
					IGNITION SW
10	IE1	17	IE1			1	EB1
							B±O
							E 7
	W		B±R
						B±O	B±O	B±O
5	2E	6	2E
2	2B	3	2B

B±W

B±O

FROM POWER SOURCE SYSTEM (SEE PAGE 66)

B±Y

E 5

7. 5A	15A
IGN	EFI

7	1H
	B±O	4	2C	B±Y	B±Y
8	2E
	3	4

		P
EFI MAIN	B±Y		1V EGRVSV(FORSYSTEM)	3A	IDLE±UPA/CVSV
W±B
RELAY			2	2
1	2
5 2A	10 2C	7 IG2
			1	1
		P	L±B	Y±L
		1 B	23 A	7 A
		BATT	EGR	ISCV
			E 6 C , E 7 B , E 8 A
			ENGINE AND ECT ECU

W

B±R

# 20

# 10

THA

THW

THG

AM140A

ALT100A

AM230A

11

A

12

A

TEMP.AIRINSENSOR

3

C

2E

WATEREFI TEMP.

SENSOR

4

C

TEMP.GASEGR SENSOR

10

C

Y

W

6I

GR

3E

CARIFORNIA)(FOR

R

R

2

2

2

6

3

E 5

INJECTOR

1

1

1

B±O

B±O

B±O

B±O

F10

FUSE BOX

2

2

2

2

BR

I 7

I 8

I 9

I10

BR

NO. 1

NO. 2

NO. 3

NO. 4

1

BR

E11

BR

1

1

1

1

B

W±B

W

Y

W

Y

FL MAIN 2. 0L

I 7

E 5

W

BATTERY

EB

92

								* 1 : PUSH TYPE OF BLOWER CONTROL SW
								* 2 : DIAL TYPE OF BLOWER CONTROL SW
B±W										B±W
B±O										B±O
										B±Y
B±Y	B±Y	18	B±Y							B±Y
E 7		IG2	I 6
				FROM POWER SOURCE SYSTEM (SEE PAGE 66)
			15A		15A				15A	P
			STOP		GAUGE				TAIL
B±Y
					J/B
			7 1B	5 1E	NO. 3		1	1D
					R±L
			G±R					3	1
					R±L		R±Y		DIODE
	I 3					3B
					9
2	ISC VALVE		2
			S10		7	A			2
			STOP LIGHT SW

C13

B ,C 14

A

6

1D

CHECK ENGINE

FROM

1

[COMB. METER]

DEFOGGER SW

3

1

G±W

3

B

C

P

J 2

O

G±W

B±W

B±Y

B±Y

JUNCTION

P

CONNECTOR

I 6

C

G±W

P

9 A 10 A

12 B 13 B

4 B

5 B

2 B

ISCC

ISCO

+B

+B1

B/K

W

ELS

E 6 C , E 7 B , E 8 A

ENGINE AND ECT ECU

E21

VC

VTA

IDL

PIM

E2

ATS

ACA

ACT

SP2

THE

KNK

16 C

1 C 11 C 12 C

2 C

9 C

15 B

8 B

21 B

16 A

3 B 13 C

P

TO CRUISE

L±Y

B±Y

LG±B

I 7

CONTROL ECU

(W/ ABS)

BR

P±L

P±B

P

GR±B

BR

L±R

Y±R

W

1

4

3

IG2

IJ1

IJ1

E 7

B±Y

BR

1

IH1

BR

BR

BR

L±Y

B±Y

G±Y

TO SPEED SENSOR

TO A/C EVAPORATOR TEMP. SENNSOR

E 5

E 7

I 7

P±L

P±B

P

BR

P±L

GR±B

BR

2

17

11

(FOR ECT)

(SHIELDED)

4

3

2

1

VC

VTA

IDL

E2

3

2

1

VC

PIM

E2

A17

A/C AMPLIFIER

T 1	V 3	1
THROTTLE POSITION	VACUUM SENSOR	K 1
SENSOR	(FOR EFI SYSTEM)
		KNOCK
		SENNSOR

93

ENGINE CONTROL (5S±FE A/T)

B±W

I 5

B±O

E 9

B±W

B±Y

B±Y

TO TACHOMETER

4

EB1

B±W

2

2

P

IG2

N 2

P

NEUTRAL

START SW

N

I 5

E 9

3

IGNITION COIL

B

20

IG2

B±O

Y±L

B

B±O

W±L

Y±L

Y±L

B±Y

L±B

B

1

2

I 6

4

3

5

2

18

8

1

3

D 1

TAC

+B

+B2

W

IG±

+B

FP

E

19

IG2

I 4

C 1

DISTRIBUTOR

IGNITER

CHECK CONNECTOR

NE±

NE

G1

G±

IGF

IGT

TE2

ECT

VF

TE1

OX

2

1

3

4

1

2

7

17

9

6

4

L

W

R

B

B±Y

W

L±G

B

V±Y

O

W

BR

L±B

B

5 A

4 A 18 A 17 A

3 A

20 A

14 C

7 C

8 C 15 C

NE±

NE+

G+

G±

IGF

IGT

TE2

DG

VF

TE1

E 6 C , E 7 B , E 8 A

ENGINE AND ECT ECU

E01

E02

E1

OX2

OX1

SPD

FC

NSW

STA

13 A

26 A

14 A

5 C

6 C

9 B

14 B

22 B

11 B

W

L±W

G

B±W

B

W

I 7

(SHEILDED)

(SHEILDED)

						W
W±B	W±B	BR	SENSOR				SENSOR		B	B L±W
				1		1			JUNCTION	6
		4O	OXYGEN (SUB)			3O	OXYGEN	(MAIN)	J 2
						I 7			CONNECTOR
				2					C14	A
				BR	BR
									SPEED SENSOR
									[COMB. METER]
				E 5		(SHEILDED)				5
						I 7
		E 5	BR
		BR		BR		BR				BR
		I 7				(SHEILDED)
										A
									J 6
		BR								A	W±B
									JUNCTION
									CONNECTOR
									(FOR EARTH)
		EC								ID

B±W

B
	B±Y
	2		3
OPENING
C10 CIRCUIT RELAY	1	4	5
	L±B	G	W±B
	I 6
	L±B

15 IF1

	L±B
	2
F16	M
FUEL PUMP
	2	3B
	6
	J/B
	NO. 3
	W±B	W±B
	4	1E
	4	1A
	BI

94

A 3	BLACK	A17				C 1	DARK GRAY			C10	DARK GRAY
	2		X	1	2	3	4	X	1	2	3
									4		5
1	2	11 X	17	X	6	7		X
	X
				8	9	X	X	17
						18

	C13 B BROWN	C14	A	D 1		BLACK	E 2 DARK GREEN
							1	2
3			1	2	3	4
	X	5 6	7 X

E 3		GRAY			E 6 C	DARK GRAY			E 7	B	DARK GRAY						E 8	A	DARK GRAY
1	2			1 2 3 4 5 6 7 8					1 2 3 4 5 X		8 9 X 11					3 4 5		7 X 9 10 11 12 13
				9	10 11 12 13 14 15 16			12 13 14 15 X		X	X X	21 22				14 15 16 17 18		20	X	23 X X 26
		F10	BLACK		F16	DARK GRAY		I 3	GRAY				I 4	BLACK			I 5	BLACK			I 6 BLACK
	1					2
3			6		X	6	1	2	3		1	2	3	4	5	1	2			1	2
	X	X	X
	I 7, I 8, I 9, I10			GRAY		I12	BLACK						J 2					J 6

1	2			4
	X	7	9	10

B	B	C	C	C
B	B	C	C	C	A	A
					A A	A A

(HINT : SEE PAGE 7)

(HINT : SEE PAGE 7)

K 1 DARK GRAY	N 2 GRAY	O 3 DARK GRAY	O 4 DARK GRAY	S10
X	2 3
1	X X		1 2
		1		2
			1

	T 1		BLACK	V 1 BLUE		V 3	BLACK
1	2	3	4	1	2
					1	2	3

95

ENGINE CONTROL (5S±FE A/T)

SERVICE HINTS

E 6, E7, E8 ENGINE AND ECT ECU

VOLTAGE AT ECU WIRING CONNECTOR

BATT±E1	: ALWAYS 10.0±14.0 VOLTS
+B±E1	: 10±14.0 VOLTS (IGNITION SW AT ON POSITION)
+B1±E1	: 10±14.0 VOLTS (IGNITION SW AT ON POSITION)
IDL±E2	: 8.0±14.0 VOLTS (IGNITION SW ON AND THROTTLE VALVE OPEN)
VC±E2	: 4.5±5.5 VOLTS (IGNITION SW AT ON POSITION)
VTA±E2	:	0.8±1.2 VOLTS (IGNITION SW ON AND THROTTLE VALVE FULLY CLOSED)
	: 3.2±4.2 VOLTS (IGNITION SW ON AND THROTTLE VALVE OPEN)
PIM±E2	: 3.3±3.9 VOLTS (IGNITION SW AT ON POSITION)
#10, #20 ± E01, E02	: 10±14.0 VOLTS (IGNITION SW AT ON POSITION)
THA±E2	: 1.9±2.9 VOLTS (IGNITION SW ON AND INTAKE AIR TEMP. 20°C, 68°F)
THW±E2	: 0.1±1.1 VOLTS (IGNITION SW ON AND COOLANT TEMP. 80°C, 176°F)
STA±E1		6.0±14.0 VOLTS (ENGINE CRANKING)
IGT±E1		0.8±1.2 VOLTS (ENGINE CRANKING OR IDLING)
W±E1		8.0±14.0 VOLTS (NO TROUBLE AND ENGINE RUNNING)
ACT±E1	: 4.5±5.5 VOLTS (IGNITION SW ON AND AIR CONDITIONING ON)
ACA±E1		2.0 VOLTS OR LESS (IGNITION SW ON AND AIR CONDITIONING ON)
TE1±E1	: 10±14.0 VOLTS (IGNITION SW ON AND CHECK CONNECTOR T±E1 NOT CONNECTED)
	: 1.0 VOLTS OR LESS (IGNITION SW ON AND CHECK CONNECTOR T±E1 CONNECTED)
NSW±E1	: 0±2.0 VOLTS (IGNITION SW ON AND NEUTRAL START SW POSITION P OR N RANGE)
	: 6.0±14.0 VOLTS (IGNITION SW ON AND EX. NEUTRAL START SW POSITION P OR N RANGE)
B/K±E1	:	10±14.0 VOLTS (BRAKE PEDAL DEPRESSED)

RESISTANCE AT ECU WIRING CONNECTORS

(DISCONNECT WIRING CONNECTOR)

IDL±E2	: INFINITY (THROTTLE VALVE OPEN)
		2.3 KΩ OR LESS (THROTTLE VALVE FULLY CLOSED)
VTA±E2	:	3.3±10.0 KΩ (THROTTLE VALVE FULLY OPEN)
		0.2±0.8 KΩ (THROTTLE VALVE FULLY CLOSED)
VC±E2	:	3.0±7.0 KΩ
THA±E2	:	2.0±3.0 KΩ (INTAKE AIR TEMP. 20°C, 68°F)
THW±E2	:	0.2±0.4 KΩ (COOLANT TEMP. 80°C, 176°F)
G+, NE+ ± G±	:	0.17±0.21 KΩ
ISCC, ISCO±+B, +B1	:	19.3±22.3 Ω

: PARTS LOCATION

CODE

SEE PAGE

CODE

SEE PAGE

CODE

SEE PAGE

A 3

30

E 8

A

33

I12

33

A17

32

F10

30

(5S±FE)

J 2

33

C 1

30 (5S±FE)

F16

34

(L/B)

J 6

33

C10

32

I 3

30

(5S±FE)

K 1

30

C13

B

32

I 4

30

(5S±FE)

N 2

30 (5S±FE)

C14

A

32

I 5

30

(5S±FE)

O 3

30 (5S±FE)

D 1

30 (5S±FE)

I 6

30

(5S±FE)

O 4

30 (5S±FE)

E 2

30 (5S±FE)

I 7

30

(5S±FE)

S10

33

E 3

30 (5S±FE)

I 8

30

(5S±FE)

T 1

30 (5S±FE)

E 6

C

33

I19

30

(5S±FE)

V 1

30 (5S±FE)

E 7

B

33

I10

30

(5S±FE)

V 3

30 (5S±FE)

: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR

CODE

SEE PAGE

JUNCTION BLOCK AND WIRE HARNESS (CONNECTOR LOCATION)

1A

1B

20

COWL WIRE AND J/B NO. 1 (LEFT KICK PANEL)

1D

1E

1H

20

ENGINE ROOM MAIN WIRE AND J/B NO. 1 (LEFT KICK PANEL)

2A

22 (2WD)

ENGINE ROOM MAIN WIRE AND J/B NO. 2 (NEAR THE BATTERY)

2B

22 (2WD)

ENGINE WIRE AND J/B NO. 2 (NEAR THE BATTERY)

2C

2E

22 (2WD)

ENGINE ROOM MAIN WIRE AND J/B NO. 2 (NEAR THE BATTERY)

3B

25

COWL WIRE AND J/B NO. 3 (BEHIND COMBINATION METER)

96

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS

CODE	SEE PAGE	JOINING WIRE HARNESS AND WIRE HARNESS (CONNECTOR LOCATION)
EB1	40 (5S±FE)	ENGINE WIRE AND COWL WIRE (REAR SIDE OF RIGHT FRONT FENDER)
IE1	44	ENGINE ROOM MAIN WIRE AND COWL WIRE (LEFT KICK PANEL)
IF1	44	FLOOR WIRE AND COWL WIRE (LEFT KICK PANEL)
IG2	44	ENGINE WIRE AND COWL WIRE (UNDER THE ENGINE ECU)
IH1	44	ENGINE WIRE AND A/C NO. 1 WIRE (BEHIND THE GLOVE BOX)
IJ1	46	COWL WIRE AND A/C NO. 1 WIRE (BEHIND THE GLOVE BOX)

: GROUND POINTS

CODE		SEE PAGE	GROUND POINTS LOCATION
EB	40	(5S±FE)	FRONT LEFT FENDER
EC	40	(5S±FE)	INTAKE MANIFOLD
ID	44		LEFT KICK PANEL
BI	48	(L/B)	UNDER THE LEFT CENTER PILLAR

: SPLICE POINTS

CODE	SEE PAGE	WIRE HARNESS WITH SPLICE POINTS	CODE	SEE PAGE	WIRE HARNESS WITH SPLICE POINTS
E 5			I 6	46	COWL WIRE
E 7	40 (5S±FE)	ENGINE WIRE	I 7	46	ENGINE WIRE
E 9
E11
I 5	46	COWL WIRE

97

ENGINE CONTROL (5S±FE M/T)

W	B±R
10 IE1	17 IE1

W

B±R

5	2E	6	2E
2	2B	3	2B

W

B±R

6		3
40A AM1	100A ALT	30A AM2
	1
	B

4 AM1

10 AM2

I12

IGNITION SW

W±B

F10

FUSE BOX

FL MAIN 2. 0L

BATTERY

EB

ST1 7

IG2 9

B±O
1 EB1
B±O	B±O
E 7

B±O

B±O

B±O

		E 5
		B±O		B±O
	NO. 1	2		NO. 2	2
I7	INJECTOR	1	I8	INJECTOR	1
		W			Y

											B±W
											B±O
FROM POWER SOURCE SYSTEM (SEE PAGE 66)
							E 5				B±Y
			7. 5A			15A
			IGN			EFI
7	1H						B±Y			B±Y
	B±O			4		2C
8	2E								EGRVSVSYSTEM)(FOR		3A VSVIDLE±UPA/C
	3		4		P		2	1V		2
				EFI MAIN
				RELAY
	1		2				1			1
5	2A	10	2C	7	IG2
							L±B			Y±L
							B±Y
					P
					2	C	23	A		1	A

				BATT			EGR		ISCV
						E 6 B , E 7 C , E 8 A
						ENGINE ECU
				# 20	# 10		THA		THW
				25 A	12	A	3 B		4 B
							GR		R
							2	E 2 EFI WATER TEMP.	2
	B±O		B±O	Y	W	I 6 IN AIR TEMP. SENSOR	BR		SENSOR BR
							1		1
3	2	4	2						BR
									E11
NO.		NO.
I9 INJECTOR	1	I10 INJECTOR	1
	W		Y

Y

I 7

W

E 5

98

* 1 : PUSH TYPE OF BLOWER CONTROL SW

* 2 : DIAL TYPE OF BLOWER CONTROL SW

B±W

B±W

B±O

B±O

B±O

E 9

P

B±Y

B±Y

B±Y

18

B±Y

B±Y

IG2

I 6

E 7

FROM POWER SOURCE SYSTEM (SEE PAGE 66)

B±Y

15A

15A

STOP

TAIL

EVAPORATORA/CTO SENSORTEMP.

5

J/B NO. 3

R±L

R±Y

1

R±L

1E

1D

3

1

I 3

9

3B

2

ISC VALVE

DIODE

A

ENGINECHECK

METER][COMB.

7

A

2

B±O

Y±R

C13

FROM

DEFOGGER RELAY

, C14

6

1D

3

1

B

G±W

B±W

3

B

B±Y

B±Y

9

IG2

P

P

O

2

I 6

IG2

Y±R

P

9 A 10 A

7 C

1 C

14 B

8 C

12 C

ISCC

ISCO

B

B1

THE

W

ELS

E 6 B , E 7 C , E 8 A

ENGINE ECU

E2

VC

PIM

E21

THG

ACA

ACT

ATS

VTA

IDL

E01

E02

9

B

11

B

2

B

16

B

13

B

3E TEMP.GASEGRSENSOR

CALIFORNIA)(FOR

3

C

6

C

10

C

10 B

12

B

13 A

26

A

BR

P±L

GR±B

BR

BR

G±Y

L±Y

P

P

W±B

W±B

L

B±Y

LG±B

L±Y

2

I 7

4

IJ1

3

IJ1

1

IG2

1

BR

E 5

BR

I 7

BR

E 7

B±Y

1

IH1

P±B

P

TO CRUISE

CONTROL ECU

E 7

P±L

(W/ ABS)

P±L		BR			L±Y
3	2	1	17	11	2	4	3	2
VC	PIM		E					T 1
								THROTTLE
								POSITION
								SENSOR
V 3
VACUUM SENSOR			A17				1
(FOR EFI SYSTEM)			A/C AMPLIFIER
								W±B
					BR			W±B

99

ENGINE CONTROL (5S±FE M/T)

B±W
B±O
P
B±Y
B±Y
TO TACHOMETER
I 5				E 9
IGNITION COIL
	W±L	B	B±O	W±L	P	W±L	B±Y		19
									IG2
								L±B
1	2				2	18	8	1	3
B±O						IG±	+B	FP	E

C 1

4

3

5

CHECK CONNECTOR

TAC

+B

+B2

TE2

VF

T

OX

D 1

I 4

7

9

6

4

DISTRIBUTOR

IGNITER

NE±

G1

G±

NE

IGT

IGF

LG

V±Y

2

3

4

1

2

1

O

W

L

R

B

Y

W

B±Y

17 A

5 A 18 A

4 A

22 A

3 A

7 B

8 B 15 B

NE±

G+

G±

NE+

IGT

IGF

TE2

VF

TE1

E 6 B , E 7 C , E 8 A

ENGINE ECU

BR

E1

OX2

OX1

KNK

SPD

FC

STA

(SHIELDED)

1 B

W

5 B

L±W

4 C

2 A

24 A

6 B

11 C

I 7

W

I 7

2J JUNCTION CONNECTOR

W

W

W

B

BR

O4 OXYGENSENSOR (SUB)

BR(SHIELDED)

O3 OXYGENSENSOR

(MAIN)

(SHIELDED)

K1 KNOCKSENSOR

C14 SENSORSPEED METER][COMB.

(SHIELDED)

B

E 5

B

1

1

1

L±W

G

6

2

BR

I 7

5

E 5

BR

BR

BR

BR

BR

I 7

(SHIELDED)

W±B

J 6

A

4

4

W±B

A

W±B

JUNCTION

1A

1E

CONNECTOR

(FOR EARTH)

EC

ID

I 8 : CANADA

I 9 : USA

B±W	B±W
4	4
2	1

	STARTER RELAY
		4		3
			4	4
		B
	B±Y
	2	EB1
		B	(M/T)	B
BR	L±B
			I 7
		B
	20	IG2
		B

		OPENING RELAY	2		3
	C10		L±B		W±B
		CIRCUIT		G
			1	4	5
			I 6			1
		15	L±B		C12 CLUTCH START SW
			IF1			2
			L±B
			2			W±B
	F16		M
	FUEL PUMP
	J/B		6
			W±B
	2
	NO. 3
W±B	3B				A	4
			BI			IG

100

A 3	BLACK	A17				C 1	DARK GRAY			C10	DARK GREEN
	2		X	1	2	3	4	X	1	2	3
									4		5
1	2	11 X	17	X	6	7		X
	X
				8	9	X	X	X
						18

C12	C13 B BROWN	C14	A	D 1		BLACK
1 2	3		1	2	3	4
		X 5 6	7 X

E 2 DARK GREEN	E 3 DARK GRAY		E 6 B DARK GRAY		E 7	C	DARK GRAY			E 8		A	DARK GRAY
1 2		1 2 3 4 5 6 7 8		1	2	3	4 X 6	1 2 3		4 5	X X X 9			10	X 12 13
	1	2		7	8	X 10 11 12
		9	10 11 12 13 14 15 16					X	X X	17 18	X	X	X 22	23	24 25 26

F10	BLACK	F16 DARK GRAY	I 3 GRAY	I 4 BLACK	I 5 BLACK	I 6 BLACK
1		2
3	6	X 6	1 2 3	1 2 3 4 5	1 2	1 2
X X	X

I 7,	I 8
I 9,	I10 GRAY

1 2

I12	BLACK		J 2		J 6		K 1	DARK GRAY
		B	B
	4	B	B	A		A	1

X

7

X

9 10

A A A A

(HINT : SEE PAGE 7)

								(HINT : SEE PAGE 7)
O 3 DARK GRAY	O 4 DARK GRAY			T 1		BLACK	V 1 BLUE		V 3	BLACK
1	1	2	1	2	3	4	1	2
								1	2	3

101

ENGINE CONTROL (5S±FE M/T)

SERVICE HINTS

E 6, E 7, E 8 ENGINE ECU

VOLTAGE AT ECU WIRING CONNECTOR

BATT±E1	: ALWAYS 10.0±14.0 VOLTS
+B±E1	: 10.0±14.0 VOLTS (IGNITION SW AT ON POSITION)
+B1±E1	: 10.0±14.0 VOLTS (IGNITION SW AT ON POSITION)
IDL±E1	: 8.0±14.0 VOLTS (IGNITION SW ON AND THROTTLE VALVE OPEN)
PSW±E1	: 4.5±5.5 VOLTS (IGNITION SW ON AND THROTTLE VALVE FULLY CLOSED)
PIM±E2	: 3.3±3.9 VOLTS (IGNITION SW AT ON POSITION)
VC±E2	: 4.5±5.5 VOLTS (IGNITION SW AT ON POSITION)
#10, #20 ± E01, E02	: 10.0±14.0 VOLTS (IGNITION SW AT ON POSITION)
THA±E2	: 1.9±2.9 VOLTS (IGNITION SW ON AND INTAKE AIR TEMP. 20°C, 68°F)
THW±E2	: 0.1±1.1 VOLTS (IGNITION SW ON AND COOLANT TEMP. 80°C, 176°F)
STA±E1	: 6.0±14.0 VOLTS (ENGINE CRANKING)
IGT±E1	: 0.8±1.2 VOLTS (ENGINE CRANKING OR IDLING)
ISCC, ISCO±E1	: 8.0±14.0 VOLTS (IGNITION SW AT ON POSITION)
W±E1	: 10.0±14.0 VOLTS (IGNITION SW ON, NO TROUBLE AND ENGINE RUNNING)
ACT±E1	: 4.5±5.5 VOLTS (IGNITION SW ON AND AIR CONDITIONING ON)
ACA±E1	: 2.0 VOLTS OR LESS (IGNITION SW ON AND AIR CONDITIONING ON)
TE1±E1	: 10.0±14.0 VOLTS (IGNITION SW ON AND CHECK CONNECTOR T±E1 NOT CONNECTED)
	: 1.0 VOLTS OR LESS (IGNITION SW ON AND CHECK CONNECTOR T±E1 CONNECTOR)
NSW±E1	: 0±2.0 VOLTS (IGNITION SW ON AND NEUTRAL START SW POSITION P OR N RANGE)
	6.0±14.0 VOLTS (IGNITION SW ON AND EX. NEUTRAL START SW POSITION P OR N RANGE)

RESISTANCE AT ECU WIRING CONNECTORS

(DISCONNECT WIRING CONNECTOR)

IDL±E1	: INFINITY (THROTTLE VALVE OPEN)
		0	Ω (THROTTLE VALVE FULLY CLOSED)
PSW±E1	:	0	Ω (THROTTLE VALVE FULLY OPEN)
		INFINITY (THROTTLE VALVE FULLY CLOSED)
THA±E2	: 2.0±3.0 KΩ (INTAKE AIR TEMP. 20°C, 68°F)
THW±E2	: 0.2±0.4 KΩ (COOLANT TEMP. 80°C, 176°F)
G+ ± G±	:	0.17±0.21 KΩ
ISCC, ISCO±+B, +B1	:	19.3±22.3 KΩ

: PARTS LOCATION

CODE

SEE PAGE

CODE

SEE PAGE

CODE

SEE PAGE

A 3

30

E 7

C

33

I10

30 (5S±FE)

A17

32

E 8

A

33

I12

33

C 1

30 (5S±FE)

F10

30

(5S±FE)

J 2

33

C10

32

F16

34

(L/B), 35 (C/P)

J 6

33

C12

32

I 3

30

(5S±FE)

K 1

30

C13

B

32

I 4

30

(5S±FE)

O 3

30 (5S±FE)

C14

A

32

I 5

30

(5S±FE)

O 4

30 (5S±FE)

D 1

30 (5S±FE)

I 6

30

(5S±FE)

T 1

30 (5S±FE)

E 2

30 (5S±FE)

I 7

30

(5S±FE)

V 1

30 (5S±FE)

E 3

30 (5S±FE)

I 8

30

(5S±FE)

V 3

30 (5S±FE)

E 6

B

33

I 9

30

(5S±FE)

: RELAY BLOCKS

CODE

SEE PAGE

RELAY BLOCKS (RELAY BLOCK LOCATION)

4

27

R/B NO. 4 (RIGHT KICK PANEL)

: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR

CODE

SEE PAGE

JUNCTION BLOCK AND WIRE HARNESS (CONNECTOR LOCATION)

1A

1D

20

COWL WIRE AND J/B NO. 1 (LEFT KICK PANEL)

1E

1H

20

ENGINE ROOM MAIN WIRE AND J/B NO. 1 (LEFT KICK PANEL)

2A

22 (2WD)

ENGINE ROOM MAIN WIRE AND J/B NO. 2 (NEAR THE BATTERY)

2B

22 (2WD)

ENGINE WIRE AND J/B NO. 2 (NEAR THE BATTERY)

2C

2E

22 (2WD)

ENGINE ROOM MAIN WIRE AND J/B NO. 2 (NEAR THE BATTERY)

3B

25

COWL WIRE AND J/B NO. 3 (BEHIND COMBINATION METER)

102

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS

CODE	SEE PAGE	JOINING WIRE HARNESS AND WIRE HARNESS (CONNECTOR LOCATION)
EB1	40 (5S±FE)	ENGINE WIRE AND COWL WIRE (REAR SIDE OF RIGHT FRONT FENDER)
IE1	44	ENGINE ROOM MAIN WIRE AND COWL WIRE (LEFT KICK PANEL)
IF1	44	FLOOR WIRE AND COWL WIRE (LEFT KICK PANEL)
IG2	44	ENGINE WIRE AND COWL WIRE (UNDER THE ENGINE ECU)
IH1	44	ENGINE WIRE AND A/C NO. 1 WIRE (BEHIND GLOVE BOX WIRE)
IJ1	46	COWL WIRE AND A/C NO. 1 WIRE (BEHIND THE GLOVE BOX)

: GROUND POINTS

CODE		SEE PAGE	GROUND POINTS LOCATION
EB	40	(5S±FE)	FRONT LEFT FENDER
EC	40	(5S±FE)	INTAKE MANIFOLD
ID	44		LEFT KICK PANEL
IG	44		R/B NO. 4 SET BOLT
BI	48	(L/B)	UNDER THE LEFT CENTER PILLAR

50(C/P)

:SPLICE POINTS

	CODE	SEE PAGE	WIRE HARNESS WITH SPLICE POINTS	CODE	SEE PAGE	WIRE HARNESS WITH SPLICE POINTS
	E 5			I 6	46	COWL WIRE
	E 7	40 (5S±FE)	ENGINE WIRE	I 7	46	ENGINE WIRE
	E 9			I 8	46	COWL WIRE
	E11			I 9	46

103

ENGINE CONTROL (4A±FE)

SYSTEM OUTLINE

THE ENGINE CONTROL SYSTEM UTILIZES A MICROCOMPUTER AND MAINTAINS OVERALL CONTROL OF THE ENGINE ETC. AN

OUTLINE OF ENGINE CONTROL IS GIVEN HERE.

1.INPUT SIGNALS

(1)WATER TEMP. SIGNAL SYSTEM

THE WATER TEMP. SENSOR DETECTS THE ENGINE COOLANT TEMP. AND HAS A BUILT±IN THERMISTOR WITH A RESISTANCE

WHICH VARIES ACCORDING TO THE WATER TEMP. THUS THE WATER TEMP. IS INPUT IN THE FORM OF A CONTROL SIGNAL TO

TERMINAL THW OF THE ECU.

(2)INTAKE AIR TEMP. SIGNAL SYSTEM

THE INTAKE AIR TEMP. SENSOR IS DETECTS THE INTAKE AIR TEMP., WHICH IS INPUT AS A CONTROL SIGNAL TO TERMINAL THA OF THE ECU.

(3)OXYGEN SENSOR SIGNAL SYSTEM

THE OXYGEN DENSITY IN THE EXHAUST EMISSIONS IS DETECTED AND INPUT AS A CONTROL SIGNAL TO TERMINAL OX OF THE ECU.

(4)RPM SIGNAL SYSTEM

CRANKSHAFT POSITION AND ENGINE RPM ARE DETECTED BY THE PICK±UP COIL INSTALLED INSIDE THE DISTRIBUTOR.

CRANKSHAFT POSITION IS INPUT AS A CONTROL SIGNAL TO TERMINAL G1 OF THE ECU, AND RPM SIGNAL IS INPUT TO

TERMINAL NE.

(5)THROTTLE SIGNAL SYSTEM

THE THROTTLE POSITION SENSOR DETECTS THE THROTTLE VALVE OPENING ANGLE, WHICH IS INPUT AS A CONTROL SIGNAL TO TERMINAL PSW OF THE ECU, OR WHEN THE VALVE IS FULLY CLOSED, TO TERMINAL IDL.

(6)VEHICLE SPEED SIGNAL SYSTEM

THE SPEED SENSOR, INSTALLED INSIDE THE COMBINATION METER, DETECTS THE VEHICLE SPEED AND INPUTS A CONTROL SIGNAL TO TERMINAL SPD OF THE ECU.

(7)NEUTRAL START SW SIGNAL SYSTEM

THE NEUTRAL START SW DETECTS WHETHER THE SHIFT POSITION IS IN NEUTRAL OR NOT, AND INPUTS A CONTROL SIGNAL

TO TERMINAL NSW OF THE ECU.

(8)A/C SW SIGNAL SYSTEM

THE OPERATING VOLTAGE OF THE A/C MAGNETIC CLUTCH IS DETECTED AND INPUT TIN THE FORM OF A CONTROL SIGNAL

TO TERMINAL AC1 OF THE ECU.

(9)BATTERY SIGNAL SYSTEM

VOLTAGE IS CONSTANTLY APPLIED TO TERMINAL BATT OF THE ECU. WHEN THE IGNITION SW IS TURNED TO ON, VOLTAGE FOR ECU OPERATION IS APPLIED VIA THE EFI MAIN RELAY TO TERMINALS +B AND +B1 OF THE ECU.

(10)INTAKE AIR VOLUME SIGNAL SYSTEM

INTAKE AIR VOLUME IS DETECTED BY THE VACUUM SENSOR AND IS INPUT AS A CONTROL SIGNAL TO TERMINAL PIM OF THE

ECU.

(11)STA SIGNAL SYSTEM

TO CONFIRM THAT THE ENGINE IS CRANKING, THE VOLTAGE APPLIED TO THE STARTER MOTOR DURING CRANKING IS

DETECTED AND IS INPUT AS A CONTROL SIGNAL TO TERMINAL STA OF THE ECU.

2.CONTROL SYSTEM

*EFI (ELECTRONIC FUEL INJECTION) SYSTEM

THE EFI SYSTEM MONITORS THE ENGINE CONDITIONS THROUGH THE SIGNALS EACH SENSOR (INPUT SIGNALS (1) TO (11))

INPUTS TO THE ECU. BASED ON THIS DATA AND THE PROGRAM MEMORIZED IN THE ECU, THE MOST APPROPRIATE FUEL INJECTION TIMING IS DECIDED AND CURRENT IS OUTPUT TO TERMINALS #10 AND #20 OF THE ECU, CAUSING THE INJECTORS

TO OPERATE IT (TO INJECT FUEL). IT IS THIS SYSTEM WHICH, THROUGH THE WORK OF THE ECU, FINELY CONTROLS FUEL INJECTION IN RESPONSE TO DRIVING CONDITIONS.

DURING ENGINE CRANKING (SIGNAL INPUT TO TERMINAL STA) OR FOR APPROX. 2 SECONDS AFTER NE SIGNAL INPUT, ECU OPERATION ENERGIZES (POINT CLOSED) THE FUEL PUMP CIRCUIT INSIDE THE CIRCUIT OPENING RELAY, CAUSING THE FUEL PUMP TO OPERATE.

*ESA (ELECTRONIC SPARK ADVANCE) SYSTEM

THE ESA SYSTEM MONITORS THE ENGINE CONDITIONS USING THE SIGNALS (INPUT SIGNALS (1, 4, 5, 10, 11)) INPUT TO THE ECU FROM EACH SENSOR. BASED ON THIS DATA AND THE PROGRAM MEMORIZED IN THE ECU, THE MOST APPROPRIATE IGNITION

TIMING IS DECIDED AND CURRENT IS OUTPUT TO TERMINAL IGT OF THE ECU. THIS OUTPUT CONTROLS THE IGNITER TO PRODUCE THE MOST APPROPRIATE IGNITION TIMING FOR THE DRIVING CONDITIONS.

*IDLE±UP SPEED CONTROL SYSTEM

THE IDLE±UP SYSTEM USES THE AIR CONTROL VALVE FOR IDLE±UP TO INCREASE THE RPM AND PROVIDE STABLE IDLING WHEN THE IDLE SPEED DROPS DUE TO THE ELECTRICAL LOAD, ETC. THE ECU EVALUATES THE SIGNALS FROM EACH SENSOR (INPUT SIGNALS (1, 4 TO 8)), CURRENT IS OUTPUT TO TERMINAL V±ISC AND CONTROLS THE VSV.

*EGR CUT CONTROL SYSTEM

THE EGR CUT CONTROL SYSTEM CONTROLS THE VSV (FOR EGR) BY EVALUATING THE SIGNALS FROM EACH SENSOR INPUT TO THE ECU (INPUT SIGNALS (1, 5, 6, 9)) AND BY SENDING OUTPUT TO TERMINAL EGR OF THE ECU.

104

*A/C CUT CONTROL SYSTEM

WHEN THE VEHICLE SUDDENLY ACCELERATES FROM LOW ENGINE SPEED, THIS SYSTEM CUTS OFF AIR CONDITIONER OPERATION FOR A FIXED PERIOD OF TIME IN RESPONSE TO THE VEHICLE SPEED, THROTTLE VALVE OPENING ANGLE AND

INTAKE MANIFOLD PRESSURE IN ORDER TO MAINTAIN ACCELERATION PERFORMANCE.

THE ECU RECEIVES INPUT SIGNALS (4, 5, 6, 7 AND 10), AND OUTPUTS SIGNALS TO TERMINAL ACT.

*OVERDRIVE CONTROL SYSTEM

THE ECU CONTROLS THE O/D SOLENOID OF THE AUTOMATIC TRANSAXLE IN RESPONSE TO SIGNALS FROM EACH SENSOR (INPUT SIGNALS (1, 4, 5, 6 AND 10)) IN ORDER TO MAINTAIN DRIVABILITY AND ACCELERATION PERFORMANCE.

THE ECU OUTPUTS A SIGNAL FROM TERMINAL OD TO CONTROL THE O/D (CALIFORNIA), TERMINAL ODT (EX. CALIFORNIA) TO

CONTROL THE O/D SOLENOID.

3. DIAGNOSIS SYSTEM

WITH THE DIAGNOSIS SYSTEM, WHEN THERE IS A MALFUNCTIONING IN THE ECU SIGNAL SYSTEM, THE MALFUNCTION SYSTEM IS RECORDED IN THE MEMORY. THE MALFUNCTIONING SYSTEM CAN THEN BE FOUND BY READING THE DISPLAY (CODE) OF THE CHECK ENGINE WARNING LIGHT.

4. FAIL±SAFE SYSTEM

WHEN A MALFUNCTION OCCURS IN ANY SYSTEM, IF THERE IS A POSSIBILITY OF ENGINE TROUBLE BEING CAUSED BY CONTINUED CONTROL BASED ON THE SIGNALS FROM THAT SYSTEM, THE FAIL±SAFE SYSTEM EITHER CONTROLS THE SYSTEM BY USING DATA (STANDARD VALUES) RECORDED IN THE ECU MEMORY OR ELSE STOPS THE ENGINE.

105

ENGINE CONTROL (4A±FE)

W 4 AM1

ST1 7

10 IE1

17 IE1

W

B±R

5	2E	6	2E
2	2B	3	2B

W

B±R

6		3
40A AM1	100A ALT	30A AM2
	1
	B

B±R 10 AM2

I12

IGNITION SW

W±B

F10

FUSE BOX

FL MAIN 2. 0L

IG2 9

B±O

1 EB1

B±O

E 7

B±O

E 5

B±O 2

I 7

NO. 1

1 W

			B±W
			B±O
FROM POWER SOURCE SYSTEM (SEE PAGE 66)			B±Y
			B±Y
		B±Y	B±Y
7. 5A	15A	E 7	E 5
IGN	EFI		B±Y

7	1H
	4	2C	B±Y
	B±O

8	2E
	3	4	P		B±Y	2
						V 1
EFI MAIN
						VSV
RELAY						(FOR EGR
						SYSTEM)
	1	2				1
5	2 A	10 2C	7	IG2
			P			L±B
			B±Y
			2	A		1 B
				BATT		EGR
				E 5	A , E 8 B
				ENGINE ECU

			# 20		# 10			VC		PIM
			25	B	12	B	18	B	4	B
	INJECTOR
B±O	B±O	B±O	Y		W		P±L		GR±B
2	2	2
I 8	I 9	I10
NO. 2	NO. 3	NO. 4
1	1	1
Y	W	Y									BR
								3		2	1
								VC		PIM	E
	E 5

V 3

VACUUM SENSOR (FOR EFI SYTEM)

BATTERY

EB

106

B±W	B±W
B±O	B

B±Y

B±Y

B±Y

B±Y

B±Y

18

B±Y

B±Y

IG2

B±Y

FROM POWER SOURCE

SYSTEM (SEE PAGE 66)

B±Y

I 1

A

,

I 2

B

AMPLIFIREA/CTO

MAGETICA/CTO

CLUTCH

P

IIA

15A

GAUGE

2

1

2

B±W

2V

VSV ELECTRICAL(FOR

IGNITER

G±Y

R±L

IDLE±UPSYSTEM)

5

A

A

DISTRIBUTOR

1

2D

1

J/B NO. 3

6

2C

C13

B

, C14

A

B±W

CHECK ENGINE

9

3B

[COMB. METER]

L

1

B

4

B

2 B

6

B

5 B

3

IJ1

4

IG1

R±L

7

3

P

A

B

I 6

B

B±Y

W

R

B

LB±B

B±W

(SHIELEDED)

P

14 B

6 B

7 B

21 B

8 B

9 B

7 A

12 A

10 A

V±ISC

IGT

IGF

NE

G1

G±

ACT

AC

W

E 5

A

, E 8

B

ENGINE ECU

THA

THW

E21

E2

THG

IDL

PSW

ODT

OD

HT

OX

5

B

3

B

22

B

16

B

20 B

19

B

17

B

15

A

15

B

15

B

10

B

6I

IN±AIRTEMP.

SENSOR

GR

2E WATEREFI TEMP.

SENSOR

R

L

P±B

Y±B

Y±B

P±B

W

BR

TEMP.GASEGR SENSOR CALIFORNIA)(FOR BR

P

W

2

2

2

I 7

W

(SHIELEDED)

1

1

BR BR

1

TOO/D SOLENOID,

CRUISECONTROL ECU

(EX.CALIFORNIA)

DIODE,O/DTO O/D SOLENOID (CALIFORNIA)

SENSOROXYGEN

EX.CALIFORNIA)(FOR

(SHIELEDED)

BR

BR

BR

E 3

6O

E 5

I 7

1

3

1

1

3

HTR

+

BR

IDL

PSW

T 1

THROTTLE

HTRE

HTRB

POSITION

4

2

2

SENSOR

E

2

BR

W

5 SENSOROXYGENCALIFORNIA)(FOR

O B±Y

BR

BR

107

ENGINE CONTROL (4A±FE)

*1 : A/T EX. CALIFORNIA

*2 : M/T, FOR CALIFORNIA A/T

B±W		B±W
		I 8
B		(A/T)
B±Y		(M/T)
B±Y
B±Y	I 6
P	2
	I62
		B
	E 7	TO TACHOMETER

19

IG2

CONNECTOR

P

B±Y

B

L±B

2

8

18

1

3

W

+B

IG±

FP

E

B±Y

B±Y

B±W

C 1 CHECK

T

VF

OX

O

V±Y

W

6

9

4

9

IG2

8 IG2

(A/T)

O

V±Y

9

A

1

A

2

B

8

A

16 A

BR

+B

+B1

NSW

T

VF

E 5

A

, E 8

B

ENGINE ECU

L±W

(SEILEDED)

E01

E02

E1

G

B

SPD

FC

STA

13

B

26

B

24

B

13

A

4

A

11 B

W

JUNCTION CONNECTOR

BR

2J

B

I 7

B

L±W

6

(SEILEDED)

W±B

W±B

BR

C14

A

SPEED SENSOR

[COMB. METER]

B±Y

5

BR

BR

BR

E 7

JUNCTION CONNECTOR EARTH)(FOR

BR

6J

A

4

4

A

W±B

W±B

1A

1E

EC

ID

108

4	B±W	B±W
EB1		E 5
	B±W
		B±W

2

N 1	P
NEUTRAL
START SW	N

1
B	B±Y

B±Y

L±B

B

		2
	C10
	CIRCUIT
	OPENING
	RELAY
	G	1
		L±B
		I 6
		L±B
	15	IF1
		L±B
		2
	F16
	FUEL PUMP	M
	J/B	6
		W±B
	2
	NO. 3
	3B
		BI

I 8 : CANADA I 9 : USA

B±W

4

2

4

4

B

2 EB1

B

(A/T)

I 7

B

20 IG2

B

3

4 5

B±W

4

1

STARTER

RELAY

3

4

B

1

START SW

CLUTCH

C12

2

W±B	W±B
A	4
	IG

		C 1	DAEK GRAY			C10	DARK GRAY	C12	C13 B	BROWN
1	2	3	4	X	1	2	3
					4		5	1 2	3	X
X	6	X		X
8	9	X	X	X
		18

C14

A

E 2

DARK GREEN

E 3

DARK GRAY

E 5

A

DARK GRAY

1

2

1

2

1 2

X 4

X

X

7 8

X 5 6

7

X

9 10 X 12 13

X

15 16

E 8

B

DARK GRAY

F10

BLACK

F16 DARK GRAY

I 1

A

DARK GRAY

I 2 B

DARK GRAY

1

2

1 2 3 4 5 6 7 8 9 10 11 12 13

6

X 6

1

2

X

3

1

2

14 15 16 17 18 19 20 21 22 X 24 25 26

X X

X

4

5

6

I 6 BLACK

I 7, I 8, I 9, I10

GRAY

1 2

1 2

I12 BLACK

J 2

	B	B
4	B	B

X

7

X

9 10

(HINT : SEE PAGE 7)

		J 6			N 1	GRAY		O 5 DARK GRAY		O 6	DARK GRAY	T 1	BLACK
A			A		1	2		1	2	1	2	1 2	3
A	A	A	A							3	4
(HINT : SEE PAGE 7)
V 1		BROWN	V 2		BLUE		V 3	BLACK
1	2		1	2
						1	2	3

109

ENGINE CONTROL (4A±FE)

SERVICE HINTS

E 5, E 8 ENGINE ECU

VOLTAGE AT ECU WIRING CONNECTOR

BATT±E1	: ALWAYS 10.0±14.0 VOLTS
+B±E1	: 10.0±14.0 VOLTS (IGNITION SW AT ON POSITION)
+B1±E1	: 10.0±14.0 VOLTS (IGNITION SW AT ON POSITION)
IDL±E1	: 8.0±14.0 VOLTS (IGNITION SW ON AND THROTTLE VALVE OPEN)
PSW±E1	: 4.0±5.0 VOLTS (IGNITION SW ON AND THROTTLE VALVE FULLY CLOSED)
PIM±E2	: 3.3±3.9 VOLTS (IGNITION SW AT ON POSITION)
VC±E2	: 4.5±5.5 VOLTS (IGNITION SW AT ON POSITION)
#10, #20±E01, E02	: 10.0±14.0 VOLTS (IGNITION SW AT ON POSITION)
THA±E2	: 1.0±3.0 VOLTS (IGNITION SW ON AND INTAKE AIR TEMP. 20°C (68°F))
THW±E2	: 0.1±1.0 VOLTS (IGNITION SW ON AND COOLANT TEMP. 80°C (176°F)
STA±E1	: 6.0±14.0 VOLTS (ENGINE CRANKING)
IGT±E1	: 0.7±1.0 VOLTS (ENGINE CRANKING OR IDLING)
WRN±E1	: 10.0±14.0 VOLTS (IGNITION SW ON, NO TROUBLE AND ENGINE RUNNING)
AC±E1	: 8.0±14.0 VOLTS (IGNITION SW ON AND AIR CONDITIONING ON)
ACT±E1	: 4.0±6.0 VOLTS (IGNITION SW ON AND HEATER BLOWER SW ON)
T±E1	: 10.0±14.0 VOLTS (IGNITION SW ON AND CHECK CONNECTOR T±E1 NOT CONNECTED)
	: 0.5 OR LESS (IGNITION SW ON AND CHECK CONNECTOR T±E1 CONNECTOR)
NSW±E1	: 0±2.0 VOLTS (IGNITION SW ON AND NEUTRAL START SW POSITION P OR N RANGE)
	: 10.0±14.0 VOLTS (IGNITION SW ON AND EX. NEUTRAL START SW POSITION P OR N RANGE)
V±ISC±E1	: 10.0±14.0 VOLTS (CRANKINNG FOR 10 SECONDS AFTER STARTING)

RESISTANCE AT ECU WIRING CONNECTORS

(DISCONNECT WIRING CONNECTOR)

IDL±E2	: INFINITY (THROTTLE VALVE OPEN)
	0	Ω (THROTTLE VALVE FULLY CLOSED)
PSW±E2	: 0	Ω (THROTTLE VALVE FULLY OPEN)
	INFINITY (THROTTLE VALVE FULLY CLOSED)
THA±E1	: 2.0		± 3.0 KΩ (INTAKE AIR TEMP. 20°C, 68°F)
THW±E1	: 0.2		± 0.4 KΩ (COOLANT TEMP. 80°C, 176°F)
G1, NE±G±	: 0.17±0.21 KΩ

: PARTS LOCATION

CODE

SEE PAGE

CODE

SEE PAGE

CODE

SEE PAGE

C 1

31 (4A±FE)

F16

35

(C/P)

J 6

33

C10

32

I 1

A

31

(4A±FE)

N 1

31 (4A±FE)

C12

32

I 2

B

31

(4A±FE)

O 5

31 (4A±FE)

C13

B

32

I 6

31

(4A±FE)

O 6

31 (4A±FE)

C14

A

32

I 7

31

(4A±FE)

T 1

31 (4A±FE)

E 2

31 (4A±FE)

I 8

31

(4A±FE)

V 1

31 (4A±FE)

E 3

31 (4A±FE)

I 9

31

(4A±FE)

V 2

31 (4A±FE)

E 5

A

33

I10

31

(4A±FE)

V 3

31 (4A±FE)

E 8

B

33

I12

33

F10

31 (4A±FE)

J 2

33

: RELAY BLOCKS

CODE

SEE PAGE

RELAY BLOCKS (RELAY BLOCK LOCATION)

4

27

R/B NO. 4 (RIGHT KICK PANEL)

: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR

CODE

SEE PAGE

JUNCTION BLOCK AND WIRE HARNESS (CONNECTOR LOCATION)

1A

20

COWL WIRE AND J/B NO. 1 (LEFT KICK PANEL)

1E

1H

20

ENGINE ROOM MAIN WIRE AND J/B NO. 1 (LEFT KICK PANEL)

2A

22 (2WD)

ENGINE ROOM MAIN WIRE AND J/B NO. 2 (NEAR THE BATTERY)

2B

22 (2WD)

ENGINE WIRE AND J/B NO. 2 (NEAR THE BATTERY)

2C

2D

22 (2WD)

ENGINE ROOM MAIN WIRE AND J/B NO. 2 (NEAR THE BATTERY)

2E

3B

25

COWL WIRE AND J/B NO. 3 (BEHIND COMBINATION METER)

110

: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS

	CODE	SEE PAGE	JOINING WIRE HARNESS AND WIRE HARNESS (CONNECTOR LOCATION)
	EB1	42 (4A±FE)	ENGINE WIRE AND COWL WIRE (REAR SIDE OF RIGHT FRONT FENDER)
	IE1	44	ENGINE ROOM MAIN WIRE AND COWL WIRE (LEFT KICK PANEL)
	IF1	44	FLOOR WIRE AND COWL WIRE (LEFT KICK PANEL)
	IG1	44	ENGINE WIRE AND COWL WIRE (UNDER THE ENGINE ECU)
	IG2
	IJ1	46	COWL WIRE AND A/C NO. 1 WIRE (BEHIND THE GLOVE BOX)

: GROUND POINTS

CODE		SEE PAGE	GROUND POINTS LOCATION
EB	42	(4A±FE)	FRONT LEFT FENDER
EC	42	(4A±FE)	INTAKE MANIFOLD
ID	44		LEFT KICK PANEL
IG	44		R/B NO. 4 SET BOLT
BI	50	(C/P)	UNDER THE LEFT CENTER PILLAR

: SPLICE POINTS

	CODE	SEE PAGE	WIRE HARNESS WITH SPLICE POINTS	CODE	SEE PAGE	WIRE HARNESS WITH SPLICE POINTS
	E 5	42 (4A±FE)	ENGINE WIRE	I 7	46	ENGINE WIRE
	E 7			I 8	46	COWL WIRE
	I 6	46	COWL WIRE	I 9	46

111