Isuzu N-Series. Manual - part 738

 Engine Control System (4JH1)    6E-3

Specifications

Temperature vs Resistance

Engine Coolant Temperature vs. Resistance

Intake Air Temperature vs. Resistance

Altitude vs Barometric Pressure

°C

°F

Ω

Temperature vs. Resistance Value (Approximately)

120

248

120

110

230

160

100

212

200

90

194

260

80

176

350

70

158

470

60

140

640

50

122

880

40

104

1250

30

86

1800

20

68

2650

10

50

4000

0

32

6180

-10

14

9810

-20

-4

16000

-30

-22

27000

°C

°F

Ω

Temperature vs. Resistance Value (Approximately)

100

212

190

90

194

240

80

176

320

70

158

430

60

140

590

50

122

810

40

104

1150

30

86

1650

25

77

2000

20

68

2430

10

50

3660

0

32

5650

-10

14

8970

-20

-4

14700

Altitude Measured 

in Meters (m)

Altitude Measured 

in Feet (ft)

Barometric 

Pressure 

Measured in 

Kilopascals (kPa)

Determine your altitude by contacting a local weather
station or by using another reference source.

4267

14000

56-64

3962

13000

58-66

3658

12000

61-69

3353

11000

64-72

3048

10000

66-74

2743

9000

69-77

2438

8000

71-79

2134

7000

74-82

1829

6000

77-85

1524

5000

80-88

1219

4000

83-91

914

3000

87-98

610

2000

90-98

305

1000

94-102

0

0 Sea Level

96-104

-305

-1000

101-105

6E-4    Engine Control System (4JH1) 

Schematic and Routing Diagrams

Vacuum Hose Routing Diagram

Legend

1. Vacuum Pump (part of ACG)
2. Vacuum Hose

3. EGR Valve
4. EGR Solenoid Valve

 

1

2

3

4

N6A3884E

 Engine Control System (4JH1)    6E-5

Engine Controls Schematics

Power Distribution (1)

SBF-1

MAIN

100A

F-8

ENG.(B1)

15A

F-5

ST

OP

 LIGHT

10A

F-9

ENG.(B2)

15A

2L

8BLK

8

WHT/

BLK

30

BLK

8

WHT/

BLK

3

WHT/

BLK

0.5

WHT/

RED

3

WHT/

BLK

0.5

WHT/

BLU

3

BLK/

BLU

3

BLU

0.5

BLK

0.5

GR

Y/

YEL

2

WHT/

BLK

3

BLK/

YEL

0.5

BLK/

YEL

0.5

BLK/

YEL

0.5

BLK/

YEL

0.5

BLK/

YEL

3

BLK/

YEL

3

BLK/

YEL

ECM Main

Relay

0.85

BRN

2

BLU

A/C

Thermo

Relay

B-7

Headlight

Bracket

Data Link

Connector

Brake

Switch

30BLK

2

H-6

Starter

ACG

Meter

4

2

5

3

X-1

1

X-1

1

Charge

Relay

4

2

5

1

X-12

X-12

Heater

A/C Relay

F-1

AIR CON

10A

SBF-25

HEA

TER

30A

2

BLK

3

BLK

5

BLK

Starter

Relay

2

1

ST

ON

ACC

OFF

Ignition

Switch

B-67

3

B-67

H-7

SBF-2

KEY

50A

SBF-3

GLOW

60A

3

WHT/

BLU

Glow Relay

P-1

P-3

P-2

P-5

P-4

Battery

ECM

W/S-M

Fuse & Relay Box

(Behind the Cab)

Fuse &

Relay Box

(Glove Box)

Relay Box

(Instrument

 Panel)

3

WHT/

BLU

A/C

Thermo

Relay

Fuse &

Relay Box

(Glove Box)

N6A3862E

6E-6    Engine Control System (4JH1) 

Power Distribution (2)

2

5

X-1

1

3

X-1

ST

ON

ACC

OFF

Ignition

switch

3

BLK/

YEL

0.5

BLK/

YEL

2

1

B-67

3

1

H-7

8BLK

SBF-2

KEY

50A

3

WHT/

BLU

3

WHT/

BLU

3

WHT/

BLU

B-67

4

2

H-6

F-22

ST

A

TER

10A

F-16

METER

10A

F-20

ABS(IG)

10A

F-15

AUDIO(IG),

CIGAR LIGHTER

15A

Key ON

Relay

F-12

H/LAMP

LEVEL

10A

F-1

1

TURN

LIGHT

10A

F-10

FRONT

 WIPER &

W

ASHER

15A

F-25

MARKER

LAMP

15A

F-27

RR FOG

10A

F-26

COND.F

AN

15A

SBF-1

MAIN

100A

SBF-26

POWER

WINDOW

30A

SBF-8

ST

AR

TER

60A

SBF-9

ABS

60A

SBF-3

GLOW

60A

SBF-4

HEAD

LAMP

30A

Heater

Relay

Glow Plug

Relay

F-4

AUDIO (B),

DOOR LOCK

15A

F-5

ST

OP

LIGHT

10A

F-8

ENG.

(B1)

15A

F-9

ENG.

(B2)

15A

F-19

HORN,

HAZARD

15A

2

WHT/

BLK

3

WHT/

BLK

3

WHT/

BLK

3

WHT/

BLU

3

BLU

0.5

BLK

W/S-G

W/S-H

W/S-A

Battery

2BLK/YEL

Fuse & Relay Box

(Behind the Cab)

Fuse &

Relay Box

(Glove Box)

Heater

Relay

N6A3863E