Isuzu N-Series. Manual - part 891

Transmission Control System (Smoother) 7A-19

Selector Lever

Transmission Control Module (TCM)

Legend

1. Economy Mode Switch

4. Emergency Switch

2. 1st Gear Start Switch

5. Selector Lever Switch (Shift Side)

3. Emergency Shift Switch

6. Selector Lever Switch (Select Side)

A

4

1

2

3

6

5

N7A2040E

Legend

1. Transmission Control Module (TCM)

2. TCM Cover

2

1

N7A2143E

7A-20 Transmission Control System (Smoother)

Transmission Control Module (TCM) 
Connector End Views

Connector No.

B-425

Connector Color

White

Test Adapter No.

J-35616-64A 

Pin 

Wire Color

Pin Function

1

BLK

2-4-6-R Shift Solenoid Valve
Ground

2

BLK

2-4-6-R Shift Solenoid Valve
Ground

3

—

Not Used

4

PNK

1-3-5 Shift Solenoid Valve Voltage
Feed

5

PNK

1-3-5 Shift Solenoid Valve Voltage
Feed

6

BLK

1-3-5 Shift Solenoid Valve Ground

7

BLK

1-3-5 Shift Solenoid Valve Ground

8

BLK/BLU

2-4-6-R Shift Solenoid Valve Control

9

BLK/BLU

2-4-6-R Shift Solenoid Valve Control

10

—

Not Used

11

GRN/ORN

Transmission Warning Lamp
Control

12

YEL/GRN

Economy Mode Lamp Control

13

—

Not Used

14

PNK

Gear Position Display Control

15

WHT/VIO

Main Relay Control

16

WHT/BLU

Starter Cut Relay Control

17

—

Not Used

18

VIO/WHT

Gearshift Control Box Relay Control

19

—

Not Used

20

—

Not Used

21

BLK/RED

1-3-5 Shift Solenoid Valve Control

N7A2099E

22

—

Not Used

23

—

Not Used

24

—

Not Used

25

—

Not Used

26

—

Not Used

27

—

Not Used

28

—

Not Used

29

RED/YEL

Lock Up Clutch Solenoid Valve
Control

30

YEL/BLK

Gearshift Clutch Solenoid Valve
Control

31

BLK/RED

1-3-5 Shift Solenoid Valve Control

Connector No.

B-426

Connector Color

White

Test Adapter No.

J-35616-64A 

Pin

Wire Color

Pin Function

1

BLK/ORN

Ignition Voltage Feed

2

BLK/ORN

Ignition Voltage Feed

3

WHT/ORN

Main Relay Voltage 

4

BLK

TCM Signal Ground

5

PNK

2-4-6-R Shift Solenoid Valve
Voltage Feed

6

PNK

2-4-6-R Shift Solenoid Valve
Voltage Feed

7

—

Not Used

8

BLK

TCM Power Ground

9

LT BLU

Keyword 2000 Serial Data

10

YEL/BLK

Gear Select Position Sensor 5 Volts
Reference

11

YEL/WHT

Gear Select Position Sensor Signal

N7A2100E

Transmission Control System (Smoother) 7A-21

12

BLK

TCM Signal Ground

13

YEL/RED

Gear Select Position Sensor Low
Reference

14

—

Not Used

15

—

Not Used

16

—

Not Used

17

BLK

TCM Power Ground

18

RED

Gear Shift Position Sensor 5 Volts
Reference

19

WHT

Gear Shift Position Sensor Signal

20

BLK

Gear Shift Position Sensor Low
Reference

21

—

Not Used

22

—

Not Used

23

—

Not Used

24

—

Not Used

Connector No.

B-427

Connector Color

White

Test Adapter No.

J-35616-64A 

Pin 

Wire Color

Pin Function

1

YEL/RED

1st Gear Start Switch Input Signal

2

BLU/WHT

CAN High Signal

3

BLU

CAN Low Signal

4

WHT/BLU

Turbine Speed Sensor Signal

5

YEL

Input Shaft Speed Sensor Signal

6

YEL/RED

Transmission Fluid Temperature
Sensor Signal

7

PNK/BLK

Selector Lever “

−” Position Switch

Input Signal

8

GRN/BLK

Selector Lever “A” Position Switch
Input Signal

N7A2101E

9

—

Not Used

10

ORN/BLU

Turbine Speed Sensor Low
Reference

11

BRN

Input Shaft Speed Sensor Low
Reference

12

BLU/WHT

Transmission Fluid Temperature
Sensor Low Reference

13

RED/BLK

Selector Lever “R” Position Switch
Input Signal

14

ORN

Selector Lever “D” Position Switch
Input Signal

15

BLU/BLK

Selector Lever “+” Position Switch
Input Signal

16

—

Not Used

17

—

Not Used

Connector No.

B-428

Connector Color

White

Test Adapter No.

J-35616-64A 

Pin Wire 

Color

Pin 

Function

1

PNK

Select Solenoid Valve Voltage Feed

2

GRY/BLK

Clutch Adjustment Fast Switch
Input Signal

3

GRN

Brake Pedal Switch Input Signal

4

BLU/RED

Emergency Switch Input Signal

5

—

Not Used

6

WHT

Emergency Shift Switch “N”
Position Input Signal

7

BLK

Select Solenoid Valve Ground

8

PNK

Select Solenoid Valve Voltage Feed

9

GRY/RED

Clutch Adjustment Slow Switch
Input Signal

10

BLK/BLU

Neutral Switch Input Signal

N7A2102E

7A-22 Transmission Control System (Smoother)

11

—

Not Used

12

GRY/RED

Door Switch Input Signal

13

BLU

Economy Mode Switch Input Signal

14

BLU/WHT

Emergency Shift Switch “1” Position
Input Signal

15

BLK

Select Solenoid Valve Ground

16

WHT/BLK

Select Solenoid Valve Control

17

GRY/BLU

Reset Switch Input Signal

18

BLK/WHT

Diagnostic Request Switch

19

BLU/WHT

PTO Switch Input Signal

20

RED

Emergency Shift Switch “R”
Position Input Signal

21

WHT/BLK

Selector Lever “N” Position Switch
Input Signal

22

WHT/BLK

Select Solenoid Valve Control