Isuzu N-Series. Service manual - part 263

5A4-26 ABS/ASR

Tech 2 Operation Procedure

The following chart shows the functions used by the cur-
rent Tech 2 software.

Menu

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)

N5A2022E

F0:

Diagnostic trouble code

F0: Read the DTC in the order of priority.

F1: Clear the DTC.

F1:

Data display

F2:

Snapshot

F3:

Actuator test

N5A2023E

ABS/ASR 5A4-27

DTC is the language for technicians to communicate
with the ECM on the vehicle.
DTC can roughly be classified into past DTC and current
DTC.

• Current DTC: Trouble (fault) occurred current igni-

tion cycle

• Past DTC: Trouble (fault) occurred previous igni-

tion cycle or that in the past

• Multiple DTC: More than one DTC may be dis-

played in a time. It is called as multiple DTC. This
happens when multiple troubles (faults) occurred
in a time. Further this happens to the sensors and
switches sharing same power source or ground.
When such power source or ground is open or
shorted, the DTCs of relevant sensors or switches
are displayed.
In this case, the power source or ground shared
must be checked for open/short circuit.
Use of DTC clear mode can erase the DTC mem-
ory stored in the vehicle.

Data display

Example

Use of this menu can display the current data.
Note that menu is subject to change.

CAUTION:

On the vehicle that the rear tires have smaller diameter,
the rear wheel speed may be indicated a little higher
than the front wheel speed. Check the speed after driv-
ing a while at a constant speed.

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N5A2025E

5A4-28 ABS/ASR

Snapshot (graph plotting)

• The snapshot can record the data list menu and

plot a graph.

• Utilizing this mode, reproduce and record the con-

ditions claimed by the customer to identify the en-
gine data fault.

• The stored data can be replayed with a domestic

power supply.

N5A2026E

ABS/ASR 5A4-29

N5A2027E