Isuzu N-Series. Manual - part 995

CAB AND CHASSIS ELECTRICAL 8-85

For 4JH1 Engine

P-5

P-4

P-3

BATTERY (12V)

P-1

P-2

B-51, B-52

EXHAUST BRAKE INDICATOR LIGHT(METER)

B-55 SPEEDOMETER

X-14 ECM RELAY

X-10 A/C THERMO RELAY

RELAY BOX ASM(No.1)

B-18 DIODE

X-12 HEATER A/C RELAY

X-11 CHARGE RELAY

B-31 

ENGINE

WARMING SW

EXHAUST BRAKE SW

STARTER SW

H-14

J-177 ABS ; C/U

J-50 NEUTRAL SW

J-32

VEHICLE SPEED

SENSOR

J-9

B-66 BRAKE SW

B-89 CLUTCH SW

B-79

DATA LINK

CONNECTOR

B-80 THROTTLE POSITION

         SENSOR

B-340 IDLE LSW

B-341 

RESISTOR IDLE LSW

H-5~H-8

B-233, B-234 ECM

B-7

B-232

JOINT CONNECTOR-2

B-29

JOINT CONNECTOR-1

B-342 NEUTRAL SW

RESISTOR

B-339 A/C ON

SIGNAL RESISTOR

B-343 JOINT CONNECTOR

RELAY BOX ASM(No.2)

FUSE BOX ASM

F-1, F-5,

F-8, F-9,

F-16

J-6

PRESSURE

SW

B-67

B-69

H-14

RELAY BOX

SBF1, SBF2, SBF3, SBF25 FUSIBLE LINK

X-20 GLOW RELAY

X-24 A/C COMPRESSOR RELAY

X-26 A/C SIGNAL RELAY

J-105 EVRV : EGR

J-40   VSV   : INTAKE THROTTLE

J-31 EXH BRAKE

        MAGNETIC VALVE(B)

E-5

MAGNETIC 

CLUTCH

J-182 

MASS AIR FLOW

SENSOR

J-183 TDC

E-16

COOLANT

TEMPERATURE

SENSOR

J-122 GLOW PLUG

E-110 INJECT PUMP

FRAME

HARNESS

N8A0099E

8-86 CAB AND CHASSIS ELECTRICAL

For 4HK1-TC Engine

RELAY BOX ASM (No. 2)

FUSE BOX ASM

F-2, F-7

,

F-9, F-16

,

F-22

B-431

RESISTOR 2

B-387

RESISTOR 1

B-79

DATA LINK CONNECTOR

B-51, B-53 METER

B-67 STARTER SW

B-1

B-7

H-15

P-5

P-1

P-2

BATTERY

P-3

P-4

F-28 FUSE

SBF1, SBF2, SBF3, SBF5, SBF8

FUSIBLE LINK

X-18 ECM MAIN RELAY

X-21 STARTER RELAY

X-26 STARTER CUT RELAY

RELAY BOX ASM

H-12

H-4, H-5, H-6,

H-7, H-8

RELAY BOX ASM (No. 1)

STARTER

SW

MAF

SENSOR

MAP

SENSOR

REV SW

J-50

NEUTRAL SW

J-31  EXH BRAKE

MAGNETIC VALVE (B)

X-14 SMOOTHER

EMERGENCY RELAY

X-1  CHARGE RELAY

X-33 DIODE

J-9

B-425, B-426,

B-427, B-428

TCM

B-31

ENGINE WARMING SW

J-191 ECM

N8A0530E

CAB AND CHASSIS ELECTRICAL 8-87

Circuit Diagram

4HE1-TC Engine (1)

N8A0100E

8-88 CAB AND CHASSIS ELECTRICAL

4HE1-TC Engine (2)

SW:LOW

(N-SPEC ONLY)

RELAY:GLOW

J-131

2

J-145

VSV:VSS

J-145

0.5B/Y

0.5B/Y

0.5B/Y

3B/L

0.5B/Y

2

1

B-233

X-20

B-233

B-11

VSV:VSS

11

H-14

4

E-76

THERMO SENSOR

HEAD LIGHT
BRACKET-LH

RACK SENSOR

ENGINE SPEED SENSOR

EVRV:EGR

2

X-20

4

7

H-5

26

B-233

H-14

8

E-76

1

8

H-5

27

5

X-20

2

B-233

J-146

B-13

VSV:

ANECON

VSV:
ANEROID
COMPENSATOR

13

0.5BR/B

0.5BR/Y

0.5

BR/W

0.5BR/B

0.5BR/Y

0.5BR/W

0.3BR/B

0.3BR/Y

0.3BR/W

0.3Y

0.3B/Y

0.3L

J-146

2

1

B-233

J-147

B-1

VSV:EGR

VSV:EGR

1

H-13

1

B-234

2

H-8

8

H-13

3

H-13

5

H-8

9

H-8

18

H-5

40

X-14

2

J-147

2

1

H-13

11

B-234

B-79

DATA LINK

CONNECTOR

0.5B/Y

0.5B/Y

0.5B/Y

0.5B/Y

0.5B/Y

0.3B/R

0.3B/R

0.5LG/B

0.3GR/B

0.3GR

0.5B

0.5W

0.5R

0.3GR/B

0.3GR

0.5B

0.5W

0.5R

0.3V

0.3LG

0.3GR/B

0.3GR

0.5B

0.5W

0.5R

0.3V

0.3LG

0.85BR/R

0.5R/W

0.5O

0.5BR/R

0.5R/W

0.3B

0.5O

0.5B

0.5BR/R

RELAY:TIMING

0.5R/W

0.3BR/Y

0.5O

0.3LG

0.3V

0.3V

0.5LG/B

3B/Y

5B/Y

A-1

CHECKER

1

7

B-234

B-79

A-15

GND

15

3

B-234

B-79

A-16

DIAG

A-27

ECM

B-2

GLOW

RELAY

16

B-234

27

H-5

29

B-233

2

6

J-131

1

J-105

2

J-105

1

MAGNETIC VALVE:TIMING

E-74

1

H-14

11

H-5

22

X-20

3

H-8

3

H-14

GLOW PLUG

16

1

E-3

B-234

H-14

1

E-43

1

21

H-5

13

B-234

RACK

SIG

A-7

H-14

2

E-43

2

7

H-5

7

B-234

H-14

3

E-43

3

6

H-5

1

B-233

H-14

12

E-2

1

9

H-8

16

B-233

ENG SIG

B-10

ENG-

B-9

RACK+

A-6

RACK-

A-21

THERMO SIG

B-8

THERMO GND

B-7

B-234

H-14

13

E-2

2

10

B-234

14

11

B-234

EVRV+

A-13

EVRV-

A-14

MV

TIMING

A-11

13

B-234

GND

A-22

22

5

X-14

4

H-8

15

X-14

12

H-8

H-13

10

6

H-8

H-13

4

5

H-8

X-14

1

A

B-7

INTAKE

TEMP

SW

N8A0101E