Self-Diagnosis Of Controller Unit; Purpose; Operation Procedure - Kubota KX71-3 Workshop Manual

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KX61-3, KX71-3 WSM-M

3. self-diagnosis of controller unit

The error diagnosis of the meter is possible by using the self-diagnostic harness. The self-diagnostic

function of a conventional model provided with a microcontroller can detect failures in the microcontroller

only after all the failure diagnosis of the electrical devices other than the microcontroller is made. This

kind of method requires time. Furthermore, there is a fear in the accuracy of the diagnosis.

By connecting the self-diagnostic harness to the meter and applying voltage from the battery, the self-

diagnostic program built into the meter will run, thus making the self-diagnosis of the incorporated hard-

ware of the meter possible with the inputs and outputs of the meter automatically activated and checked.

Note:

It is not 100% possible to make the perfect self-diagnosis of the hardware of the meter, however,

because not all hardware components built into the meter are checked.

1. Dismount the meter from the main harness of

the equipment and connect the meter to the

self-diagnostic harness.

2. Connect the 12-V terminal and negative termi-

nal of the self-diagnostic harness to the battery.

3. Self-diagnosis starts automatically.

M-V-39

Electrical System

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Kx61-3