Isuzu D-Max / Isuzu Rodeo (TFR/TFS). Manual - part 10

4JA1-TC/4JH1-TC ENGINE DRIVEABILITY AND EMISSIONS

6E–35

ECM WIRING DIAGRAM (5/7)

Batt

µP

Batt

µP

Batt

µP

0.5
BLK/
URG

0.5
BRN/
RED

0.5
BLU/
RED

0.5
BLU/
RED

4JA1-TC

0.5
GRY/
YEL

97

46

61

0.5
WHT/
RED

83

0.5
GRN/
RED

88

0.5
BLK/
RED

92

0.5
BLK/
BLU

84

IAT
Sensor

MAF &
IAT
Sensor

Rr Fog
Light
10A

EGR-
EVRV

0.5
WHT/
BLK

0.5
BLU/
RED

0.5
WHT/
BLU

0.5
BLU/
RED

0.5
GRN/
RED

0.5
BLU/
RED

Exhaust
Throttle
VSV2

Exhaust
Throttle
VSV1

Engine
Warming Up
SW

Thermo
SW

2

4

5

3

1

Battery
Voltage

ECM
Main Relay

IC

IC

IC

CPU

Engine
Control
Module
(ECM)

40

6E–36

4JA1-TC/4JH1-TC ENGINE DRIVEABILITY AND EMISSIONS

ECM WIRING DIAGRAM (6/7)

0.5
BLK

0.5
GRN/
BLK

69

0.5
RED/
GRN

49

0.5
GRN/
ORG

38

0.5
BLK/
GRN

57

2.0
BLK

1

2.0
BLK

2

0.5
BLK/
PNK

93

0.5
GRY

ECT

Sensor

TPS &

Idle SW

89

0.5
WHT

98

101

0.5
GRN/
RED

CKP

Sensor

90

IC

IC

IC

IC

Engine
Control
Module
(ECM)

4JA1-TC/4JH1-TC ENGINE DRIVEABILITY AND EMISSIONS

6E–37

ECM WIRING DIAGRAM (7/7)

µP

1.25
BLK

16 15 14 13 12 11 10 9

8 7 6 5 4 3 2 1

0.5
RED/
YEL

0.5
WHT

0.5
BLU

35

45

0.5
BRN/
YEL

42

IC

Stop
Light
10A

Meter
15A

Ignition
SW

Check
Engine
Lamp

Imnobiliser

Control Unit

Butery
Voltage

7

8

Engine
Control
Module
(ECM)

6E–38

4JA1-TC/4JH1-TC ENGINE DRIVEABILITY AND EMISSIONS

ECM CONNECTOR PIN ASSIGNMENT & OUTPUT SIGNAL (4JA1-TC)

View Looking Into ECM Case

Pin 
No. 

B/Box 

No.

Pin Function

Wire 

Color

Signal or Continuity

ECM 

Connection

Tester Position

Key SW Off

Key SW 

On

Engine 

Idle

Engine 

2000rpm

Range

(+)

(-)

1

1

ECM Ground

BLK

Continuity 

with ground

-

-

-

Disconnect

Ω

1

GND

2

2

ECM Ground

BLK

Continuity 

with ground

-

-

-

Disconnect

Ω

2

GND

3

3

Battery Power Supply

BLU/RED

Less than 1V

Battery voltage 

Connect

DC V

3

GND

25

25

No Connection

-

-

-

-

-

-

-

-

-

26

26

No Connection

-

-

-

-

-

-

-

-

-

27

27

Engine Speed Output 
(To Tacho Meter)

BLU/RED

-

-

Approx. 

23Hz by 

wave form 

or approx. 

7.2V 

Approx. 

68Hz by 

wave form 

or approx. 

7.5V 

Connect

AC V

27

GND

28

28

No Connection

-

-

-

-

-

-

-

-

-

29

29

No Connection

-

-

-

-

-

-

-

-

-

30

30

Brake Switch 1 Signal

RED

Less than 1V

Battery voltage when pedal is 

stepped on

Connect

DC V

30

GND

31

31

Clutch Switch Signal 

YEL

Less than 1V

Battery voltage when pedal is not 

stepped on

Connect

DC V

31

GND

32

32

No Connection

-

-

-

-

-

-

-

-

-

33

33

A/C Thermo Relay

GRN

Less than 1V

Battery voltage when A/C request 

switch is turned on

Connect

DC V

33

GND

34

34

No Connection

-

-

-

-

-

-

-

-

-

35

35

Immobiliser Control 
Unit (ICU B8)

RED/BLU

-

Wave form

-

-

-

-

36

36

No Connection

-

-

-

-

-

-

-

-

-

37

37

No Connection

-

-

-

-

-

-

-

-

-

38

38

Throttle Position 
Sensor (TPS) Output 
Signal

GRN/

ORG

Less than 1V

Less than 1V

Approx. 1V

Connect

DC V

38

49

39

39

Key Switch Input Signal 
Via Engine Fuse

BLU/YEL

Less than 1V

Battery voltage

Connect

DC V

39

GND

40

40

Exhaust Throttle VSV 1 WHT/BLK

Less than 1V

Battery voltage when QWS is not 

activated

Connect

DC V

40

GND

41

41

A/C Compressor Relay

BRN/RED

Less than 1V

Battery 
voltage

Battery voltage when A/

C compressor is not 

activated

Connect

DC V

41

GND

42

42

Check Engine Lamp

RED/YEL

Less than 1V

Battery voltage when lamp is turned 

off

Connect

DC V

42

GND

43

43

Glow Lamp

ORG/BLU

Less than 1V

Battery voltage when lamp is turned 

off

Connect

DC V

43

GND

44

44

No Connection

-

-

-

-

-

-

-

-

-