Isuzu N-Series. Service manual - part 887

Transmission Control System (Smoother) 7A-3

Schematic and Routing Diagrams

Transmission Controls Schematics

Power Distribution

8WHT/BLK

8BLK

2L

J-26

B

SBF-8

60A

SBF-4

40A

Battery

P-1

P-2

P-3

P-4

P-5

ST

AR

TER

Starter

HEAD

LAMP

SBF-5

ECM

40A

Fuse & Relay Box

(Behind the Cab)

SBF-3

60A

GLOW

SBF-2

40A

KEY

 SW

SBF-9

40A

ABS

SBF-7 

60A

NEES

SBF-6

60A

CERAMIC

HEA

TER

SBF-1

MAIN

100A

 or

120A

3

WHT/

BLU

F-21

10A

F-9

3

BLK/

YEL

3BLK/YEL

F-16

10A

F-17

NEES (IG)

10A

F-18

10A

Fuse &

Relay Box

(Glove Box)

ENG. (IG)

10A

ABS (IG)

METER

SRS

F-22

10A

ST

AR

TER

3

WHT/

BLU

5

WHT/

BLK

5

WHT/

BLK

8

WHT/

BLK

1.25

RED

0.5BLU/BLK

0.5

BLK

3

WHT/

BLK

J-9

Frame

3

WHT/

GRN

2

RED

Main

Relay 

4

2

5

3

X-18

X-18

F-28

ECM

10A

Fuse &

Relay Box

(Cab Side)

ECM

ECM

Fuse & Relay Box

(Behind the Cab)

Fuse &

Relay Box

(Glove Box)

F-4

15A

AUDIO(B)

DOOR LOCK

F-13

NEES (B)

10A

F-5

F-6

10A

POWER

WINDOW

10A

ST

OP

LIGHT

W/S-I/-J

W/S-H

W/S-H

3BLK/YEL

ON Relay

H-6

1

Ignition

Switch

2

ST

ON

ACC

OFF

B-67

3

4

B-67

USW JOINT3

0.5BLK

N7A2131E

7A-4 Transmission Control System (Smoother)

Starting System

ECM

TCM

30 BLK/RED

8 BLK

8 BLK

8 BLK

3 BLK/YEL

P-1

P-2

P-3

P-4

Battery

P-5

3

BLK/

WHT

3

WHT/

BLK

0.5

RED/WHT

0.5

RED/WHT

0.5

RED

0.5

WHT/

BLU

0.3

BLK/WHT

3

WHT/

BLU 

3

WHT/

BLU 

2L

SBF-8

ST

AR

TER

60A

SBF-2

KEY

40A

F-22

ST

AR

TER

10A

14

H-8

0.5

RED/

WHT

0.5

WHT/

BLU

0.5

WHT/

BLU

J-9

Frame

4

B-67

USW

JOINT

 3

2

BLK

0.5

BLK

14

J-191

B-425

46

Start cut

relay

control

Start

switch

signal

38

H-5

16

Starter

cut

relay

control

Fuse &

Relay Box

(Glove Box)

F-28

ECM

10A

Fuse &

Relay Box

(Behind the Cab)

Fuse &

Relay Box

(Behind the Cab)

Fuse &

Relay Box

(Behind the Cab)

2

3

J/C-2

0.85

L

T

 GRN

0.5

L

T

 GRN

ECM

Main Relay

5

2

X-21

Starter

Relay

4

3

X-21

5

1

X-26

Starter Cut

Relay

3

4

X-26

ST

ON

ACC

OFF

Ignition

Switch

Starter

B

C

1

J-27

1

J-26

F-16

10A

METER

0.5

BLK/

YEL

0.5

BLK/

YEL

0.5

BLK/

YEL

14

H-12

Emergency

Switch

5

1

N-17

N-17

W/S-M

0.3

BLU/

RED

0.3

BLU/

RED

0.3

BLK

0.3

BLK

W/S-E

0.3

BLK

B-7

Headlight

Bracket

Smoother

Emergency

Relay

1

X-14

3

Relay Box

(Instrument Panel)

0.3BLU/RED

4

B-428

14

4

H-12

Emergency

switch

signal

1

H-7

2

B-67

2

5

X-14

N7A2144E

Transmission Control System (Smoother) 7A-5

ECM and TCM Power

N7A2132E

0.5

WHT/

VIO

0.5

GRN/

WHT

1.25

GRN/

WHT

1.25

GRN/

WHT

TCM

Fuse & Relay Box

(Glove Box)

15

B-425

F-13

NEES(B)

10A

1.25

WHT/

ORN

3

Smoother

Main Relay

1

5

2

X-5

X-5

3

Main

relay

control

Battery voltage

Relay Box

(Instrument Panel)

0.5

BLK/

ORN

0.5

BLK/

ORN

0.5

BLK/

ORN

2

B-426

1

Ignition voltage

F-17

NEES(IG)

10A

7A-6 Transmission Control System (Smoother)

TCM Ground and DLC

TCM

4

B-426

0.5

BLK

2

BLK

12

0.5

BLK

17

1.25

BLK

8

2

12

1

13

Diagnostic

request

(SRS)

Diagnostic

request

(ECM)

Diagnostic

request

(EHCU)

Class 2 Serial

Communication

Ground

Ground

5

B-79

4

18

B-428

11

Diagnostic

request

switch

Diagnostic

request

1.25

BLK

1.25

BLK

0.3

BLK/

WHT

0.5

BLK

0.5

BLK

0.3

WHT/

BLK

0.3

WHT/

GRN

0.5

YEL

0.5

GR

Y

0.5L

T

 BLU

DLC

9

B-426

7

Keyword 2000

Keyword serial

communication

0.3

L

T

 BLU

0.5

L

T

 BLU

EHCU (ABS Module)

EHCU (ABS Module)

ECM

SRS C/U

ECM

B-1

Frame

W/S-D

18

21

22

J/C-B

W/S-C

Signal ground

Signal ground

Power ground

Power ground

N7A2133E