SECTION 55 - ELECTRICAL SYSTEM
55-40
ARROW, OPEN BOOK, AND AUDIBLE
ALARM TEST
In this mode, by pressing the “ARROW,” 1, or “OPEN
BOOK,” 2, switches, all of the display segments are
turned on for verification and at the same time with an
audible beep. If all segments do not light the circuit
bulb or wires to the switches, sensors or senders may
be defective.
To check the individual EIC board circuits and circuits
to the switches, sensors, and senders, perform the
following “EIC CIRCUIT TESTS”.
Whenever any of the sensors or switches are toggled
on or off, the EIC board will light and the audible
alarm will briefly beep. This indicates that the wire to
the sensor or switch is intact, but does not yield any
information about the condition of the sensor.
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DIAGNOSTIC MODE EIC CIRCUIT TESTS
To simulate a fault condition while in the diagnostic
mode do the following:
NOTE: When in the diagnostic mode and a circuit is
triggered, all the board lights will light up
accompanied by an audible beep.
1. Hydraulic Oil Filter Restriction Switch
Remove the DKGN/O filter sensor wire, 1, from
the sender.
The EIC board lights will all light up and the board
will beep when this test is performed.
If the EIC board lights and beeps, the EIC and
circuit wire to the sensor is OK. The problem is in
the sensor; replace the sensor. If the EIC board
fails to light and beep, check the wire from the
sensor to the EIC board.
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