Failure Code [Db2Rkr] Engine Controller Can-Net: Disconnection In Signal Line - Komatsu WA250-6 Shop Manual

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350 Troubleshooting by failure code (Display of code), Part 5

Failure code [DB2RKR] Engine controller CAN-NET: Disconnection in signal line

Failure code [DB2RKR] Engine controller CAN-NET: Disconnection in

Failure code

• Communication via CAN signal line between the HST controller and engine controller is defective.

• Uses CAN information that was sent from engine controller before the occurrence of the error.

• Once engine stops, recognized engine speed is fixed to low idle.

• Once engine stops, recognized operating degree of accelerator is fixed to 0%.

• Turns the centralized warning lamp and alarm buzzer ON.

• If problem is removed, system is returned to normal operating state.

Problem that

• The monitor does not display normally

• If engine controller power supply circuit is defective, engine stops.

• Method of reproducing failure code: Turn the starting switch ON.

Defective CAN end point

Possible causes

and standard

value in normal

Disconnection in wiring har-

(Disconnection or defective

contact in connector)

WA250, 250PZ-6

Engine controller CAN-NET: Disconnection in signal line

(HST controller system)

a Prepare with starting switch OFF, then carry out troubleshooting

without turning starting switch ON.

a Prepare with starting switch OFF, then carry out troubleshooting

without turning starting switch ON.

a Prepare with starting switch OFF, then carry out troubleshooting

without turning starting switch ON.