Opel Frontera UBS. Manual - part 1973

4B2–39

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.

Check

Pin

No.

Circuit to be

tested

Ignition

Switch

Position

Engine

State

Multimeter

Scale/

Range

Measure 

between Pin

Number

Standard Valve

Note

14

D-G MAP

OFF

STOP

W

14, 19

Continuity : OK
(Gasoline)
No continuity : OK
(Diesel)

20

P-GND

OFF

STOP

W

20, 19

Continuity : OK

19

GND

OFF

STOP

W

19, GND

Continuity : OK

8

4H SW

OFF

STOP

W

8, 19

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

9

4L SW

OFF

STOP

W

9, 19

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

10

AXLE SW

ON

RUN

W

10, 19

Continuity : OK

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

13

DIAG

OFF

STOP

W

13 (TOD), 8

(DLC 

Connector)

Continuity : OK

DLC connector terminal 8

25

IND.a

ON

STOP

DCV

25 (+), 19 (–)

8.0 

∼

14.5 V

When the indicator lamp is turned off.

26

IND.b

ON

STOP

DCV

26 (+), 19 (–)

8.0 

∼

14.5 V

When the indicator lamp is turned off.

27

IND.c

ON

STOP

DCV

27 (+), 19 (–)

8.0 

∼

14.5 V

When the indicator lamp is turned off.

30

CHECK

LAMP

ON

STOP

DCV

30 (+), 19 (–)

8.0 

∼

14.5 V

When the indicator lamp is turned off.

11

ABS IN

ON

STOP

DCV

11 (+), 19 (–)

11.5 

∼

14.5 V

15

Ref.

ON

STOP

DCV

15 (+), 19 (–)

5 

∼

9 V

Connect ECU

24

Ft.(+)

ON

STOP

DCV

24 (+), 19 (–)

0.7 

∼

6 V

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

23

Rr.(+)

ON

STOP

DCV

23 (+), 19 (–)

0.7 

∼

6 V

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

18

COM(-)

ON

STOP

DCV

18 (+), 19 (–)

0V

Connect ECU

1

Vig

ON

STOP

DCV

1 (+), 19 (–)

8 

∼

14.5 V

7

BRAKE

OFF

STOP

DCV

7 (+), 19 (–)

8 

∼

14.5 V

Press brake pedal

21

TPS

ON

STOP

DCV

21 (+), 19 (–)

0.2 

∼

4.6 V

Step on the accelerator pedal and make
sure that voltage changes.

3

4WD OUT

OFF

STOP

W

3, 19

7 

∼

12 k

W

Disconnect battery GND terminal

5

ADC(+)

OFF

STOP

W

5, 19

10 

∼

30 

W

Disconnect battery GND terminal

4

SOL(+)

OFF

STOP

W

4, 19

1.0 

∼

5.0 

W

Disconnect battery GND terminal

12

4WD SW

ON

STOP

DCV

12 (+), 19 (–)

SW OFF : 0 V
SW ON : 8.0 

∼

14.5 V

SW OFF : Contact point open
SW ON : Contact point close

6

LIGHTING

ON

STOP

DCV

6 (+), 19 (–)

SW OFF : 8.0 

∼

14.5

V
SW ON : 0 V

28

AUTO INDI

ON

STOP

DCV

28 (+), 19 (–)

TOD : 0 V
2H & 4L : 8.0 

∼

14.5

V

Connect ECU

29

RR INDI

ON

STOP

DCV

29 (+), 19 (–)

0 V

Connect ECU. When the indicator lamp is
turned on.

DRIVE LINE CONTROL SYSTEM (TOD)

4B2–40

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.

901RW180

Legend

(1) PCMCIA Card
(2) RS 232 Loop Back Connector

(3) SAE 16/19 Adaptor
(4) DLC Cable
(5) Tech–2

4B2–41

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 00 System PCMCIA card (1) inserts into

the Tech 2 (5).

2. Connect the SAE 16/19 adapter (3) to the DLC cable

(4).

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

ALDL/DLC connector.

810RW308

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

060RW009

NOTE: The RS232 Loop back connector is only to use for
diagnosis of Tech 2 and refer to user guide of the Tech 2.

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

DRIVE LINE CONTROL SYSTEM (TOD)

4B2–42

060RY00269