Isuzu N-Series. Service manual - part 239

ANTI-LOCK BRAKE SYSTEM (ABS) 5A4-21

Parts Location

For LHD Model

H-16

J-74 F/RH SENSOR

B-66 ST

OPLIGHT SW

(BRAKE SW)

B-1 EARTH ;

FRAME (FR)

B-67 IGNITION SW "A"

B-233,B-234 ECM

FUSE BOX ASM

F-2,F-5,F-16 

STARTER SW

J-148 R/RH

SENSOR (24V)

J-177

ABS EHCU

B-52 EXH. BRAKE

IND. LAMP (METER) 

B-51

ABS ARNING LIGHT

(METER) 

J-75 F/LH SENSOR

B-79 DATA LINK CONNECTOR

J-9 EAR

TH ;

 FRAME

(12V)

(24V)

X-5 ABS INDICATOR RELAY

X-8 EXHAUST BRAKE RELAY

 (24V)

RELAY BOX ASM (No.1)

X-25 EXHAUST BRAKE CONTROL RELAY

X-28 EXHAUST BRAKE CUT RELAY

J-23 DIODE

FL-1,FL-2,FL-9 FUSIBLE LINK

J-31 EXH. BRAKE

MAGNETIC VALVE

B-75

ACCEL SW

H-13

P-5

P-1

~

P-4

BATTERY    

H-17

H-14

H-15

J-149 R/LH

SENSOR (24V)

R-6

STOPLIGHT (RH)

R-1

STOPLIGHT (LH)

SENSOR (12V)

J-78 R/RH,R/LH

B-7 EARTH ;

HEADLIGHT B/T

B-69

EXH. BRAKE SW

B-89 CLUTCH SW

H-5

~

H-8

N8A0537E

5A4-22 ANTI-LOCK BRAKE SYSTEM (ABS)

For RHD Model

H-16

H-17

H-14

H-15

J-74 F/RH SENSOR

H-5

~

H-8

B-66 STOPLIGHT SW

B-89 CLUTCH SW

B-79 

DATA LINK

CONNECTOR

B-69 EXH. BRAKE SW

(BRAKE SW)

B-1 EAR

TH ;

 FRAME (FR)

B-67 IGNITION SW "A"

B-7 EAR

TH ;

 HEADLIGHT B/T

B-233,B-234 ECM

FUSE BOX ASM

F-2,F-5,F-16 

STARTER SW

J-148 R/RH

P-5

H-13

J-31 EXH. BRAKE

MAGNETIC VALVE

SENSOR (24V)

J-149 R/LH

SENSOR (24V)

R-6

STOPLIGHT (RH)

R-1

STOPLIGHT (LH)

SENSOR (12V)

J-177

ABS EHCU

B-51 ABS 

J-75 F/LH SENSOR

J-9 EAR

TH ;

 FRAME

(12V)

(24V)

J-78 R/RH,R/LH

P-1

~

P-4

BATTERY    

W

ARNING LIGHT (METER)

B-52 EXH. BRAKE

IND. LAMP (METER) 

B-75 ACCEL SW

RELAY BOX ASM (NO.1)

X-5 ABS INDICATOR RELAY

X-8 EXHAUST BRAKE RELAY (24V)

X-25 EXHAUST BRAKE CONTOROL RELAY

X-28 EXHAUST BRAKE CUT RELAY

J-23 DIODE

FL-1,FL-2,FL-9 FUSIBLE LINK

N8A5607E

ANTI-LOCK BRAKE SYSTEM (ABS) 5A4-23

Circuit Diagram

12 Volt (4JH1 Engine)

ABS

60A

P-5

P-2

BATTERY

P-1

B-1

B-7

0.85B

H-6

2

B-51

7

B-51

8

FL-9

MAIN
100A

FL-1

KEY SW

50A

FL-2

METER

10A

F-16

8B

8W/B

3R

8W/B

3W/B

3W/B

0.5G/Y

0.5G

SW ; STOP LIGHT

B

OFF

ACC

ON

ST

B-67

2

B-67

3

KEY SW

3W/L

0.5B

2B

3B

0.5B/Y

0.5B/Y

0.5B/Y

STOP LIGHT

10A

F-5

B-66

4

B-66

1

0.5B/Y

0.5W

X-5

4

X-5

5

X-5

1

X-5

3

3B/Y

METER

ABS

RELAY ;
ABS IND.

3W/L

H-7

1

3B

3B

2B

0.3W/V

22

H-5

J-9

P-4

P-3

FRAME-LH (CENTER)

FRAME LH (FRONT)

HEADLIGHT BRACKET (LH)

C

D

E

F

A

B

G

H

N8A5590E

5A4-24 ANTI-LOCK BRAKE SYSTEM (ABS)

J-78

4

J-78

3

0.5R

0.5W

0.3W/G

0.3W/B

0.3W/G

0.3W/B

0.3W/B

0.5B

0.5B

SPEED
SENSOR
(RR,RH)

J-74

1

J-74

2

0.5P

0.5L

SPEED
SENSOR
(FRT,RH)

J-75

1

J-75

2

0.5V

0.5R/B

0.5P

0.5L

0.5V

0.5R/B

SPEED
SENSOR
(FRT,LH)

0.85B

J-177

22

J-177

16

STOP LAMP

EHCU ; ABS

ECM

B-234  (62)

RL 12V

34

J-78

2

J-78

1

24

MOTOR +B

RL SIG

32

2

VALVE +B

FL SIG

33

23

MOTOR GND

FL GRD

10

1

VALVE GND

FR SIG

11

8

EXH.B/CUT
OUT

FR GRD

21

7

EXH.B/CUT
IN

RR 12V

12

6

IND.

RR SIG

29

IG

MODE1

MODE2

MODE3

J1850

4

FRASH

VEHICLE TYPE CONNECTOR

NKR77-3 (FLAT LOW)

EXCEPT NKR77-3
(EXCEPT FLAT LOW)

2B

3R

3R

3B

3B

0.5B/Y

0.3W/V

0.3W/V

0.3W/V

0.5B/Y

0.5B/Y

0.5B/G

0.5B/R

0.5B/W

1.25B

0.5G

0.5G

0.5G

0.5G

0.5G

H-5

11

2

(30)

ECM

H-16

2

STOP

LIGHT

(RH)

STOP

LIGHT

(LH)

0.5G

1.25B

1.25B

0.5L

0.5Y

SPEED
SENSOR
(RR,LH)

16 15 14 13 12 11 10 9

8

7

6

5

4

3

2

1

H-5

35

H-5

36

H-5

40

H-14

10

H-14

11

H-14

12

DATA LINK
CONNECTOR

B-79

0.3W/G

H-5

27

H-5

26

3R

0.5G

0.5LG/B

0.5LG/W

0.5LG/B

0.5LG

0.5LG/W

0.5LG/B

3B

3B

ECM

B-234  (32)

B-234

J-177

J-177

J-177

J-177

J-177

J-177

J-177

J-177

J-177

J-177

J-177

J-177

J-177

J-177

J-177

J-177

H-14

H-14

15

H-14

16

H-15

1

H-15

2

H-15

5

H-15

6

H-15

4

H-15

3

H-15

7

H-15

8

3

J-177

17

J-177

14

J-177

15

J-177

H-14

9

H-17

4

H-17

3

H-17

1

H-17

2

H-17

H-17

H-17

H-17

H-17

H-17

H-17

H-17

R-1

2

6

R-1

7

H-16

7

H-14

R-6

2

6

R-6

C

D

A

B

E

F

G

H

0.5Y

0.5L

ECM

35

45

B-234

B-234

N8A5591E