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

Page 42

FAILURE CODE [DR81MA]

40 TROUBLESHOOTING

FAILURE CODE [DR81MA] Action level

Failure code

E03 Detail of failure

Failure

DR81MA

Option Setting Mismatch (Translator Controller) (Retarder controller system)

When starting switch is turned to ON position, the option setting information sent from translator controller differs from that stored in the retarder controller.

Action of conNone troller Phenomenon on machine

The option system caution lamp lights up and the alarm buzzer sounds.

Even if cause of failure is eliminated, machine does not become normal until starting switch is turned to OFF position.

Related inforMethod of reproducing failure code: Turn the starting switch to the ON position. mation No.

Cause

Procedure, measurement location, criteria and remarks

1

Defective translator controller and retarder controller

The option setting of the translator controller or the retarder controller is probably incorrect. After replacing the translator controller or the retarder controller, set the options correctly. For details, see TESTING AND ADJUSTING.

2

3

Open circuit in wiring har- 1. ness 2.

Starting switch: OFF Disconnect the connector TLC3. Connect a T-adapter to the female side.

(wire breakage or defective contact)

Resistance

Defective translator controller

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

Between TLC3 (female) (20) and ground

Max. 1Ω

Circuit diagram of option setting

40-14

HD785-7


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