Isuzu N-Series. Manual - part 652

6E-30    Engine Control System (4HK1) 

Vehicle Speed Sensor (VSS)

Legend

1. Vehicle Speed Sensor (VSS)

 

Engine Control Module (ECM) Connector End Views

N6A6578E

1

N6A3797E

5

6

25

44

63

7

26

45

64

8

27

46

65

9

28

47

66

10

29

48

67

11

30

49

68

12

31

50

69

13

32

51

70

14

33

52

71

15

34

53

72

16

35

54

73

17

36

55

74

18

37

56

75

19

38

57

76

20

39

58

77

21

40

59

78

22

41

60

79

23

42

61

80

24

43

62

81

4

1

3

2

 Engine Control System (4HK1)    6E-31

Connector No.

J-191

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 Power Ground

2

RED

ECM Main Relay Voltage

3

BLK

ECM Power Ground

4

BLK

ECM Power Ground

5

RED

ECM Main Relay Voltage

6

BLU/RED

MIL Control

7

BLU/PNK

Exhaust Brake Lamp Control

8

LT  GRN

Engine Speed Signal Output to 
Tachometer

9

—

Not Used

10

BLK/RED

Glow Plug Relay Control

11

ORN/BLU

Glow Indicator Lamp Control

12

—

Not Used

13

—

Not Used

14

WHT/BLU

Starter Cut Relay Control

15

BLK

Exhaust Brake Solenoid Valve 
Control

16

—

Not Used

17

—

Not Used

18

BLU/WHT

CAN High Signal

19

YEL/GRN

VSS Signal

20

BLK

APP Sensor 1 Shield Ground

21

BLU/BLK

ECM Main Relay Control

22

—

Not Used

23

—

Not Used

24

YEL/BLK

Ignition ON Switch Input Signal

25

—

Not Used

26

—

Not Used

27

—

Not Used

28

—

Not Used

29

—

Not Used

30

—

Not Used

31

—

Not Used

32

—

Not Used

33

PNK

Refrigerator Switch Input Signal

34

GRN/ORN

A/C Input Signal

35

—

Not Used

36

—

Not Used

37

BLU

CAN Low Signal

38

LT BLU

Keyword 2000 Serial Data

39

BLK

APP Sensor 2 Shield Ground

40

BLU/BLK

ECM Main Relay Control

41

PNK/BLK

APP Sensor 1, Idle Up Sensor & 
PTO Throttle Sensor Low 
Reference

42

RED

APP Sensor 1, Idle Up Sensor & 
PTO Throttle Sensor 5 Volts 
Reference

43

BLK

ECM Signal Ground

44

BLU/ORN

PTO Mode Switch Input Signal

45

LT GRN/RED

Exhaust Brake Switch Input 
Signal

46

RED/WHT

Start Switch Input Signal

47

BRN/YEL

Clutch Switch Input Signal (M/T 
Only)

48

WHT/BLK

Park Brake Switch Input Signal

49

—

Not Used

50

BLK/BLU

Neutral Switch Input Signal

51

LT GRN/BLU

Engine Warm Up Switch Input 
Signal

52

YEL

Diagnostic Request Switch

53

—

Not Used

54

—

Not Used

55

—

Not Used

56

—

Not Used

57

—

Not Used

58

—

Not Used

59

—

Not Used

60

BLK

APP Sensor 2, BARO Sensor & 
IAT Sensor Low Reference

61

RED

APP Sensor 2 & BARO Sensor 5 
Volts Reference

62

BLK

ECM Signal Ground

63

WHT

APP Sensor 1 Signal

64

WHT

APP Sensor 2 Signal

65

—

Not Used

66

BLU/YEL

Idle Up Sensor Signal

67

—

Not Used

68

—

Not Used

Connector No.

J-191

Connector Color

Black

Test Adapter No.

J-35616-4A (Pin 1 – 5)

J-35616-64A (Pin 6 – 81)

Pin

Wire Color

Pin Function

6E-32    Engine Control System (4HK1) 

69

—

Not Used

70

BRN

PTO Throttle Sensor Signal

71

BRN/GRN

BARO Sensor Signal

72

RED/GRN

IAT Sensor Signal

73

—

Not Used

74

—

Not Used

75

—

Not Used

76

—

Not Used

77

—

Not Used

78

—

Not Used

79

—

Not Used

80

—

Not Used

81

BLK

ECM Case Ground

Connector No.

E-111

Connector Color

Black

Test Adapter No.

J-35616-4A (Pin 82 – 113)

J-35616-64A (Pin 114 – 121)

Pin

Wire Color

Pin Function

82

WHT

FRP Sensor Signal

83

LT GRN/

WHT

FT Sensor Signal

84

GRN/YEL

ECT Sensor Signal

85

—

Not Used

Connector No.

J-191

Connector Color

Black

Test Adapter No.

J-35616-4A (Pin 1 – 5)

J-35616-64A (Pin 6 – 81)

Pin

Wire Color

Pin Function

113

105

97

89

112

104

96

88

111

103

95

87

110

102

94

86

109

101

93

85

108

100

92

84

107

99

91

83

106

98

90

82

121

120

115

118

116

119

114

117

N6A3798E

86

WHT/ORN

EGR Valve Position Sensor 
Signal

87

GRN/BLU

FRP Sensor & EGR Valve 
Position Sensor 5 Volts 
Reference

88

—

Not Used

89

GRN/RED

FRP Regulator Low Side

90

WHT

FRP Sensor Signal

91

RED

Boost Pressure Sensor Signal

92

—

Not Used

93

—

Not Used

94

—

Not Used

95

WHT

Boost Pressure Sensor 5 Volts 
Reference

96

—

Not Used

97

GRN/RED

FRP Regulator Low Side

98

BLU/WHT

CMP Sensor Signal

99

BLU/BLK

CMP Sensor 12 Volts Reference

100

BLK

FRP Sensor & CMP Sensor 
Shield Ground

101

BRN

FRP Sensor & EGR Valve 
Position Sensor Low Reference

102

LT GRN/

WHT

Intake Throttle Solenoid Valve 
Control

103

ORN

EGR Valve Motor Control Low 
Side

104

—

Not Used

105

WHT/RED

FRP Regulator High Control

106

ORN

CKP Sensor Low Signal

107

YEL

CKP Sensor High Signal

108

BLK

Boost Pressure Sensor & CKP 
Sensor Shield Ground

109

BLK

Boost Pressure Sensor, ECT 
Sensor & FT Sensor Low 
Reference

110

—

Not Used

111

BLK/ORN

EGR Valve Motor Control High 
Side

112

—

Not Used

113

WHT/RED

FRP Regulator High Control

114

—

Not Used

115

—

Not Used

Connector No.

E-111

Connector Color

Black

Test Adapter No.

J-35616-4A (Pin 82 – 113)

J-35616-64A (Pin 114 – 121)

Pin

Wire Color

Pin Function

 Engine Control System (4HK1)    6E-33

Engine Controls Connector End Views

Accelerator Pedal Position (APP) Sensor

Barometric Pressure (BARO) Sensor

Boost Pressure Sensor

116

RED

Common 2 (Cylinder #2 & #3) 
Fuel Injector Drive

117

WHT/YEL

Cylinder #4 Fuel Injector 
Solenoid Control

118

BLK

Cylinder #2 Fuel Injector 
Solenoid Control

119

GRN/WHT

Cylinder #1 Fuel Injector 
Solenoid Control

120

BLK/BLU

Cylinder #3 Fuel Injector 
Solenoid Control

121

WHT

Common 1 (Cylinder #1 & #4) 
Fuel Injector Drive

Connector No.

B-280

Connector Color

Gray

Test Adapter No.

J-35616-33

Pin

Wire Color

Pin Function

1

RED

APP Sensor 2 5 Volts Reference

2

WHT

APP Sensor 2 Signal

3

BLK

APP Sensor 2 Low Reference

4

BLU

APP Sensor 1 5 Volts Reference

5

BLU/WHT

APP Sensor 1 Signal

6

BLU/RED

APP Sensor 1 Low Reference

Connector No.

E-111

Connector Color

Black

Test Adapter No.

J-35616-4A (Pin 82 – 113)

J-35616-64A (Pin 114 – 121)

Pin

Wire Color

Pin Function

N6A6451E

3

2

1
4

5

6

Connector No.

B-422

Connector Color

Gray

Test Adapter No.

J-35616-33

Pin

Wire Color

Pin Function

1

BLK

BARO Sensor Low Reference

2

BRN/GRN

BARO Sensor Signal

3

RED

BARO Sensor 5 Volts Reference

Connector No.

J-216

Connector Color

Gray

Test Adapter No.

J-35616-33

Pin

Wire Color

Pin Function

1

BLK

Boost Pressure Sensor Low 
Reference

N6A6452E

1

2

3

N6A6452E

1

2

3