Isuzu Trooper (2000 year). Manual - part 101

DRIVE LINE CONTROL SYSTEM (TOD)

4B2–24

Reference

D

Transfer connector pin assignment (connector on the
transfer case)
for inspection of transfer pins.

810RW310

No.

NAME

CONTENTS

1

Ref. (Rer. )

Rear speed sensor reference output

2

Ref. (Frt. )

Front speed sensor reference output

3

SW GND

SW GND

4

4H SW (+)

4H SW plus terminal

5

Rer. (+)

Rear speed sensor plus

6

Frt. (+)

Front speed sensor plus

7

POWER GND

Power GND

8

SOL (+)

Electromagnetic solenoid

9

COM (–) (Rer. )

Rear speed sensor GND

10

COM (–) (Frt. )

Front speed sensor GND

11

NC

Not used

12

4L SW (+)

4L SW plus terminal

4B2–25

DRIVE LINE CONTROL SYSTEM (TOD)

Checking Failed TOD Control Unit Pin

NOTE:

1. Unplug the ECU connector and the pins, unless

otherwise specified.

2. Before removing the ECU, turn off the ignition switch.
3. If the standard values are not observed, check the

pins with other testers.

Che
ck
Pin
No.

Circuit to be
tested

Ignition
Switch
Position

Engine
State

Multime-
ter
Scale/
Range

Measure be-
tween Pin
Number

Standard Valve

Note

4

D-G MAP

OFF

STOP

m

4, 46

Continuity : OK

22

P-GND

OFF

STOP

m

22, 46

Continuity : OK

46

GND

OFF

STOP

m

46, GND

Continuity : OK

31

4H SW

OFF

STOP

m

31, 46

No continuity (high,
4L) and continuity
(N) : OK

44

4L SW

OFF

STOP

m

44, 46

No continuity (high)
and continuity (4L,
N) : OK

42

AXLE SW

ON

RUN

m

42, 46

Continuity : OK

Remove ECU and start the engine.  Move
the vehicle forth and back to connect axle
surely.

29

DIAG

OFF

STOP

m

29 (TOD), 8
(DLC Con-
nector)

Continuity : OK

DLC connector terminal 8

17

IND.a

ON

STOP

DCV

17 (+), 46 (–)

8.0 

∼

14.5 V

6

IND.b

ON

STOP

DCV

6 (+), 46 (–)

8.0 

∼

14.5 V

18

IND.c

ON

STOP

DCV

18 (+), 46 (–)

8.0 

∼

14.5 V

20

CHECK
LAMP

ON

STOP

DCV

20 (+), 46 (–)

8.0 

∼

14.5 V

33

ABS IN

ON

STOP

DCV

33 (+), 46 (–)

11.5 

∼

14.5 V

12

Ref.

ON

STOP

DCV

12 (+), 46 (–)

5 

∼

9 V

Connect ECU

32

Ft.(+)

ON

STOP

DCV

32 (+), 46 (–)

0.7 

∼

6 V

Connect ECU and move the vehicle (off one
tooth of speed sensor ring) making sure of
voltage change.

45

Rr.(+)

ON

STOP

DCV

45 (+), 46 (–)

0.7 

∼

6 V

Connect ECU and move the vehicle (off one
tooth of speed sensor ring) making sure of
voltage change.

13

COM(-)

ON

STOP

DCV

13 (+), 46 (–)

0V

Connect ECU

14

Vig

ON

STOP

DCV

14 (+), 46 (–)

8 

∼

14.5 V

37

BRAKE

OFF

STOP

DCV

37 (+), 46 (–)

8 

∼

14.5 V

Press brake pedal

15

TPS

ON

STOP

DCV

15 (+), 46 (–)

PWM duty cycle
10% – 90%

Step on the accelerator pedal and make
sure that duty cycle changes.

36

4WD OUT

OFF

STOP

m

36, 46

7 

∼

12 k

m

Disconnect battery GND terminal

23

ADC(+)

OFF

STOP

m

23, 46

10 

∼

30 

m

Disconnect battery GND terminal

11

SOL(+)

OFF

STOP

m

11, 46

1.0 

∼

5.0 

m

Disconnect battery GND terminal

30

TOD SW

ON

STOP

DCV

30 (+), 46 (–)

SW OFF : 8.0 

∼

14.5

V

SW ON : 0 V

SW OFF : Contact point open

SW ON : Contact point close

40

LIGHTING

ON

STOP

DCV

40 (+), 46 (–)

SW OFF : 8.0 

∼

14.5

V

SW ON : 0 V

19

AUTO INDI

ON

STOP

DCV

19 (+), 46 (–)

TOD : 0 V

2H : 8.0 

∼

14.5 V

8

RR INDI

ON

STOP

DCV

8 (+), 46 (–)

0 V

34

VIG

ON

STOP

DCV

34 (+), 46 (–)

8 

∼

14.5 V

DRIVE LINE CONTROL SYSTEM (TOD)

4B2–26

Tech 2 Scan Tool

From 98 MY, Isuzu dealer service departments are
recommended to use Tech 2. Please refer to Tech 2 scan
tool user guide.

901RW257

Legend

(1) PCMCIA Card
(2) SAE 16/19 Adaptor

(3) DLC Cable
(4) Tech 2

4B2–27

DRIVE LINE CONTROL SYSTEM (TOD)

Getting Started

D

Before operating the Isuzu PCMCIA card with the
Tech 2, the following steps must be performed:

1. The Isuzu 98 System PCMCIA card (1) inserts into

the Tech 2 (4).

2. Connect the SAE 16/19 adapter (2) to the DLC cable

(4).

3. Connect the DLC cable to the Tech 2 (4)
4. Mark sure the vehicle ignition is off.
5. Connect the Tech 2 SAE 16/19 adapter to the vehicle

DLC connector.

821RW021

6. The vehicle ignition turns on.
7. Power up the Tech 2.
8. Verify the Tech 2 power up display.

060RW009

Operating Procedure

The power up screen is displayed when you power up the
tester with the Isuzu systems PCMCIA card. Follow the
operating procedure below.

060RY027