Komatsu HD785-7 Dump Truck Drowsiness Detection System (DDS) Shop Manual SEN06857-04 - PDF DOWNLOAD

Page 44

FAILURE CODE [DV03KY]

40 TROUBLESHOOTING

FAILURE CODE [DV03KY] Action

Failure code

level

DV03KY

E01 Detail of failure

Failure

Drowsiness Alarm Buzzer Output Hot Short Circuit (Translator controller system)

When the controller does not energize the drowsiness alarm buzzer solenoid, an abnormal current flows through the circuit.

Action of con- Even if the cause of the failure no longer exists, the machine does not become normal until the troller starting switch is turned to the OFF position. Phenomenon on machine

The drowsiness alarm buzzer sound does not stop.

Related information No.

Cause

1

Hot short circuit in wiring harness (contact with 24V circuit)

Procedure, measurement location, criteria and remarks 1.

Starting switch: OFF

2.

Disconnect the connector TLC2. Connect a T-adapter to the female side.

3.

Starting switch: ON

Resistance 2

Defective translator controller

Between TLC2 (female) (18) and ground

Max. 1V

If no failure is found by the checks above, the translator controller is defective. (Because this is an internal defect, troubleshooting cannot be done.)

Circuit diagram of the drowsiness alarm buzzer

40-16

HD785-7


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