Isuzu N-Series. Manual — part 741

Engine Control System (4JH1) 6E-15

Ground Distributions

0.85 BLK

0.5 BLK

0.5 BLK

0.5 BLK

0.5 BLK

Starter

A/C Signal Relay

Starter Relay

DLC (Pin 5)

DLC (Pin 4)

Heater A/C Relay

IPC

Power

Distribution

Battery

B-7

B-1

J-9

0.5 BLK

VSS

0.5 BLK

19

H-5

0.85
BLK

2 BLK

3 BLK

5
BLK

0.5 BLK

2
BLK

P-5

P-9

PCU

2
BLK

2
BLK

H-14

16

Frame

Headlght Bracket

Frame

Frame

0.3 BLK

0.3 BLK

0.5 BLK

0.85 BLK

Neutral Switch

A/C ON Signal Resistor

IPC

Engine Warm up Switch

0.5 BLK

APP Sensor & Idle Switch

0.85
BLK

0.85
BLK

ECM

(Pin 1)

ECM

(Pin 2)

5
BLK

2
BLK

2
BLK

0.85
BLK

0.85
BLK

W/S-C

W/S-C

W/S-E

J/C-D

J/C-E

1

6

5

9

N6A3877E

B-1

Frame

Frame

6E-16 Engine Control System (4JH1)

Component Locator

Engine Controls Component Views

CKP Sensor, EGR Solenoid Valve, ECT Sensor, Intake Throttle Solenoid Valve and MAF / IAT Sensor

Legend

1. Crankshaft Position (CKP) Sensor
2. EGR Solenoid Valve
3. Engine Coolant Temperature (ECT) Sensor

4. Intake Throttle Solenoid Valve
5. Mass Air Flow (MAF) / Intake Air Temperature

(IAT) Sensor

N6A3878E

1

2

4

3

5

Engine Control System (4JH1) 6E-17

ECM

Legend

1. Engine Control Module (ECM)

APP Sensor

Legend

1. Accelerator Pedal Position (APP) Sensor

Fuel Injection Pump and PCU

Legend

1. Fuel Injection Pump
2. Pump Control Unit (PCU)

VSS

Legend

1. Vehicle Speed Sensor (VSS)

1

N6A3903E

1

N6A3907E

N6A3904E

1

2

N6A3905E

1

6E-18 Engine Control System (4JH1)

Engine Control Module (ECM) Connector End Views

5

4

17

55

74

18

56

75

19

57

76

20

58

77

21

59

78

22

60

79

23

61

80

24

62

81

9

47

66

10

48

67

11

49

68

6

44

63

7

45

64

8

46

65

12

50

69

13

51

70

14

52

71

15

53

72

16

36 37 38 39 40 41 42 43

28 29 30

25 26 27

31 32 33 34 35

54

73

2

1

3

N6A3797E

Connector No.

B-234

Connector Color

Black

Test Adapter No.

J-35616-4A (Pin 1 – 5)

J-35616-64A (Pin 6 – 81)

Pin

Wire Color

Pin Function

1

BLK

ECM Ground

2

BLK

ECM Ground

3

BLU/RED

ECM Battery Voltage

4

—

Not Used

5

—

Not Used

6-24

—

Not Used

25

—

Not Used

26

—

Not Used

27

BLU/GRN

Engine Speed Signal Output to
Tachometer

28

—

Not Used

29

—

Not Used

30

GRN

Brake Pedal 1 Switch (Stoplamp
Pedal Switch) Signal

31

YEL

Clutch Pedal Switch

32

LT GRN/

WHT

Exhaust Brake Cut Signal Input
from EHCU (ABS Module)

33

GRN/YEL

A/C ON Signal Relay Input

34

—

Not Used

35

YEL

Keyword 2000

36

—

Not Used

37

—

Not Used

38

GRN/ORN

APP Sensor Signal

39

WHT

Ignition Voltage Feed

40

LT GRN

Exhaust Brake Solenoid Valve

41

WHT/GRN

A/C Compressor Relay Control

42

GRN/YEL

MIL Control

43

ORN/BLU

Glow Indicator Lamp Control

44

—

Not Used

45

BLU

Diag Switch

46

BRN/RED

Engine Warm Up Switch Input

47

—

Not Used

48

—

Not Used

49

BLK/GRN

APP Sensor Low Reference

50

—

Not Used

51

—

Not Used

52

—

Not Used

53

—

Not Used

54

—

Not Used

55

—

Not Used

56

—

Not Used

57

RED/GRN

APP Sensor 5 Volts reference

58

BLU/BLK

ECM Main Relay Control

59

BRN

Engine Warm Up Indicator Lamp
Control

60

GRN/RED

Exhaust Brake Lamp Control

61

—

Not Used

Connector No.

B-234

Connector Color

Black

Test Adapter No.

J-35616-4A (Pin 1 – 5)

J-35616-64A (Pin 6 – 81)

Pin

Wire Color

Pin Function