Failure Code [Dhs3Ma] Arm In Ppc Press Sensor Def Function - Komatsu PC88MR-10 Shop Manual

Failure code [DHS3MA] Arm IN PPC Press Sensor Def Function

DHS3MA-400-A-Z0-A)
Action level Failure code
L01 DHS3MA
Detail of
Signal voltage of arm IN PPC pressure sensor circuit is below 0.3 V or above 4.5 V.
failure
Sets arm IN PPC pressure to 0 MPa {0 kg/cm
Action of
If cause of failure disappears, machine becomes normal by itself.
controller
Automatic deceleration does not cancel.
Problem on
Controllability of arm IN deteriorates.
machine
a If 5 V circuit (3) and ground circuit (1) of pressure sensor are connected inversely,
pressure sensor will be broken. Accordingly, take extreme care when checking.
As T-adapter for pump controller connector is "socket-type box", operating voltage cannot
Related
be measured at pump controller connector.
information
Arm IN PPC pressure can be checked with monitoring function.
(Code: 07200 Arm IN PPC pressure)
Method of reproducing failure code: Turn starting switch to ON position or start engine.
No. Cause
Defective 5V sensor power
1
supply 1 system
Defective arm IN PPC
pressure sensor (internal
2
defect)
PC88MR-10
Arm IN PPC Pressure Sensor Defective Function
Failure
(Pump controller system)
Procedure, measuring location, criteria and remarks
If failure code [DA25KP] is also displayed, perform troubleshooting for it
first.
1. Turn starting switch to OFF position.
2. Disconnect connector P05 and connect T-adapters to female side.
3. Turn starting switch to ON position.
a If power supply voltage is abnormal, proceed to check on cause 3.
Voltage Between P05 (female) (3) and (1)
1. Turn starting switch to OFF position.
2. Insert T-adapters into connector P05.
3. Turn starting switch to ON position.
Voltage Between P05 (2) and (1)
a If power supply voltage is normal and sensor output voltage is
abnormal, it is difficult to judge whether cause of failure is defective
sensor, ground fault or hot short circuit in wiring harness. Check as
below.
1. Turn starting switch to OFF position.
2. Replace connector P05 with connector of other PPC pressure
sensor.
3. Turn starting switch to ON position and display "Abnormality Record"
screen of electrical system on machine monitor.
4. If E mark is not displayed again for this failure code, arm IN PPC
pressure sensor is defective.
a After finishing test, restore connectors.
40 Troubleshooting
Troubleshooting by failure code (Display of code)
2 }.
(PC88MR-
Power
4.5 to 5.5
supply
V
Sensor
0.5 to 4.5
output
V
40-303