Attachment Indicator Is Not Displayed Properly With Monitoring Function - Komatsu PC200-8M0 Shop Manual

400 Troubleshooting of electrical system (E-mode)
E-34 ATTACHMENT indicator is not displayed properly with monitoring function
E-34 ATTACHMENT indicator is not displayed properly with monitoring
function
Failure "Attachment" operation signal is not displayed properly on monitoring screen.
q
q
Related information
k
Cause
Defective PPC pressure switch
1 (P14) for front end of attachment
control pedal
Defective PPC pressure switch
2 (P15) for rear end of attachment
control pedal
Defective wiring harness or pump
3
controller
PC200, 200LC, 220, 220LC-8M0
Monitoring code: 01901 Pressure switch 2
For safety, use "short connector" 799-601-7230 for 2-pin X connector in troubleshooting for
cause 1 and 2.
Do not check pressure switch connector while engine is running.
A. If "Service" operation signal displayed on monitoring screen is not "ON"
when engine is started and attachment control pedal is depressed at front end
1. Turn starting switch to OFF position.
2. Disconnect connector P14 and connect "short connector" to male side.
3. Turn starting switch to ON position.
a After finishing troubleshooting, return connectors as they were.
If "Service" operation signal displayed on monitoring screen changes to "ON",
front service PPC pressure switch (P14) is defective (Note 1).
B. If "Service" operation signal displayed on monitoring screen is ON" when
starting switch is turned to ON position
1. Turn starting switch to OFF position.
2. Disconnect connector P14.
3. Turn starting switch to ON position.
If "Service" operation signal displayed on monitoring screen changes to
"OFF", front service PPC pressure switch (P14) is defective (Note 2).
A. If "Service" operation signal displayed on monitoring screen is not "ON"
when engine is started and attachment control pedal is depressed at rear end
1. Turn starting switch to OFF position.
2. Disconnect connector P15 and connect "short connector" to male side.
3. Turn starting switch to ON position.
a After finishing troubleshooting, return connectors as they were.
If "Service" operation signal displayed on monitoring screen changes to "ON",
rear service PPC pressure switch (P15) is defective (Note 1).
B. If "Service" operation signal displayed on monitoring screen is ON" when
starting switch is turned to ON position
1. Turn starting switch to OFF position.
2. Disconnect connector P15.
3. Turn starting switch to ON position.
If "Service" operation signal displayed on monitoring screen changes to
"OFF", rear service PPC pressure switch (P15) is defective (Note 2).
1. Turn starting switch to OFF position.
2. Insert T-adapters into P13.
3. Start engine.
4. Operate attachment control pedal, and perform troubleshooting.
Between P13 (1) and (2)
Between P13 (1) and (2)
Procedure, measuring location, criteria and remarks
attachment control pedal:
Neutral
attachment control pedal:
front end or rear end
depressed
SEN06138-00
Voltage Approx. 7 V
Voltage Max. 1 V
53
40-400