Failure Code [Dwk0Ka] 2-Stage Relief Sol Discon - Komatsu PC130-8 Shop Manual

Hydraulic excavator

Hide thumbs Also See for PC130-8:

Table of Contents

Failure code [DWK0KA] 2-stage relief sol discon

Failure code

• When output to 2-stage relief solenoid is turned OFF, disconnection was detected in circuit.

• None in particular. (Since no current flows, solenoid does not operate.)

• If cause of failure disappears, system resets itself.

Problem that

• Power maximizing function does not work.

• Travel power is low.

• Operating condition of 2-stage relief solenoid can be checked with monitoring function. 

(Code: 02300 Solenoid 1)

• Method of reproducing failure code: Turn starting switch ON + Set machine in mode other than (L).

Defective 2-stage relief sole-

noid (Internal disconnection)

Possible causes

Disconnection in wiring har-

and standard

ness (Disconnection in wiring

value in normal

or defective contact in con-

3 Defective pump controller

2-stage relief solenoid disconnection

(Pump controller system)

Standard value in normal state/Remarks on troubleshooting

a Prepare with starting switch OFF, then carry out troubleshoot-

Wiring harness between CP02 (female)

(109) – V06 (female) (2)

Wiring harness between CP02 (female)

(115), (117), (120) – V06 (female) (1)

a Prepare with starting switch OFF, then carry out troubleshoot-

Between (109) – (115), (117),

ing without turning starting switch ON.

Between (1) – (2)

ing without turning starting switch ON.

CP02 (female)

40 Troubleshooting