Isuzu N-Series. Manual - part 1194

SRS CONTROL SYSTEM 9C-23

Step

Action

Value

YES

NO

1

Turn the starter switch to ON.

Do warning lamps other than “SRS” operate
properly?

—

Go to Step2

Go to Step3

2

1. Turn the starter switch to OFF.
2. Remove the SRS control unit connector.
3. Turn the starter switch to ON.

Does the “SRS” warning lamp come on?

—

Replace the SRS 

control unit.Go to 

Step5

Go to Step4

3

Replace the meter assembly.

Is this step completed?

—

Go to Step5

Go to Step3

4

1. Either of the “SRS” warning lamp power

supply circuit or “SRS” warning lamp is
open.

2. Find the cause.

Is this step completed?

—

Go to Step5

Go to Step4

5

Connect all the SRS parts, and check that
those are installed properly.

Is this step completed?

—

Check the repair.

Go to Step5

9C-24 SRS CONTROL SYSTEM

Trouble Diagnosis with Scan Tool

Tech 2
Tech 2 is a useful tool to diagnose electric fault and sys-
tem check of the airbag system.
Though it is possible to diagnose the fault without Tech
2, using the Tech 2 allows you to diagnose quickly.
Tech 2 is small and light tester. It can communicate with
the SRS control unit to perform various types of diagno-
sis and tests by connecting the self-diagnosis connector
equipped to the vehicle.

Legend

1. PCMCIA card
2. SAE 16/19 adapter

3. DLC cable
4. Tech 2

Feature of Tech 2

Caution:

• Tech 2 (4) is a 12-V power supply system. Do not

use 24-V power supply. If the vehicle system is

equipped with a 24-V power supply, use a 12-V
battery with an adapter for power distribution. 

• Never use cigarette lighter socket.

1

4

2

3

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SRS CONTROL SYSTEM 9C-25

• Set the PCMCIA card (1) to Tech 2, and attach the

VCI (Vehicle Communication Interface) (2)(3) to
connect to the DLC in the vehicle.

• Turn the power switch off before installing/remov-

ing the PCMCIA card.

• Tech 2 has a capacity of equivalent to two snap-

shots.

• PCMCIA card is sensitive to magnetic and electro-

static. Handle it with care.

• Tech 2 can plot a graph of snapshots.
• Pressing the EXIT key can bring back to the main

menu anytime.

• Open the application menu and press the

“F1:Clear DTC Info” or the DTC clear to clear diag-
nosis trouble codes (DTCs).

How to Connect Tech 2

1. Insert the PCMCIA card to the Tech 2 body.
2. Install the SAE 16/19 adapter to the DLC cable.
3. Install the DLC cable to the Tech 2 body.
4. Make sure that the ignition key is OFF.
5. Connect the SAE-16/19 adapter of the Tech 2 to

the self-diagnosis connector (black) in the body
side.

Connect an adapter cable between the Tech 2 and
12-V battery. 

Legend

1. 3A-fuse

6. Turn the ignition switch to “ON” and press the

“PWR” key of the Tech 2.

7. Check the display of the Tech 2.

Caution:

Make sure that no power is supplied to the Tech 2 when
installing/removing the PCMCIA card.

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1

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Press ENTER to continue.

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9C-26 SRS CONTROL SYSTEM

Operation Procedure

Menu

• The following chart shows the functions used by

the current Tech 2 software.

DTC (Diagnostic Trouble Code) Mode
Two options are available for Tech 2 DTC mode. After
selecting the DTC, the following menu is displayed.

• DTC Info (DTC information)
• Clear Info (DTC clear)

Press ENTER to continue.

Vehicle identification

Select one of the followings.

MY

Main menu

F0 : Diagnostics

F1 : List of capture data

F2 : Tool option

F3 : Download/Upload help

(1) Press "ENTER" key.

(2) Select "F0 : Diagnostics".

(3) Select model year.

Go to next page.

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F0: Diagnostic trouble code

F0: Read the DTC in the order of priority.
F1: Clear the DTC.

F1: Data display

F2: Snapshot

F3: Programming

F0: Event data clear prohibition

Vehicle identification

Select one of the followings.

(UB)  Trooper, Bighorn

(UE)  Rodeo/Amigo,Wizard

(N* )  ELF, NPR, NQR

Vehicle type

(4) Select "(N* ) ELF, NPR, NQR".

F1 : Transmission

F0 : Engine

F2 : Chassis

F3 : Body

System selection menu

(N* )  ELF, NPR, NQR

(5) Select "F3 : Body".

Vehicle identification

Select one of the followings.

Airbag
Others

Body

(6) Select Airbag.

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