Failure Code [Da22Kk] Pump Con Solenoid Power Volt Low Error - Komatsu PC88MR-10 Shop Manual

Failure code [DA22KK] Pump Con Solenoid Power Volt Low Error

DA22KK-400-A-Z0-A)
Action level Failure code
L03 DA22KK
Detail of
Power supply supply voltage of controller for driving solenoids is below 20 V.
failure
Stops detection of failures (open circuit and short circuit) in all solenoid systems while this
Action of
failure code is active.
controller
If cause of failure disappears, machine becomes normal by itself.
No solenoid valve is energized properly, so machine does not work properly.
Problem on
(Work equipment, swing, and travel systems do not work.)
machine
Hydraulic fan does not rotate in reverse direction.
If failure code [D110KB] is displayed, perform troubleshooting for it first.
As T-adapter for pump controller connector is "socket-type box", operating voltage cannot
Related
be measured at pump controller connector.
information
Method of reproducing failure code: Turn starting switch to ON position.
No. Cause
Defective fusible link
1
F02
Defective fuse No. 2 in
2
fuse box F01
Improper battery
3
voltage
Defective wiring
4
harness
Open circuit in wiring
5
harness
PC88MR-10
Pump Controller Solenoid Power Voltage Low Error
Failure
(Pump controller system)
Procedure, measuring location, criteria, and remarks
If fusible link F02 is blown, circuit probably has ground fault (see Cause 6).
If fuse is blown, circuit probably has ground fault (see Cause 7).
1. Turn starting switch to OFF position.
2. After measuring voltage, measure it again when starting engine.
Voltage Between battery (+) and ground
1. Turn starting switch to OFF position.
2. Turn the battery disconnect switch to OFF position.
3. Disconnect connector CP02 and connect T-adapter to female side.
4. Turn battery disconnect switch to ON position.
5. Turn starting switch to ON position.
Between ground and each of CP02 (female) (116),
Voltage
(118) and (121)
a If no failure is found by check on cause 4, this check is not required.
a fusible link or fuse is blown, replace it in advance.
1. Turn starting switch to OFF position.
2. Turn the battery disconnect switch to OFF position.
3. Disconnect connector CP02 and connect T-adapter to female side.
Between R03 and each of CP02 (female) (116),
Resistance
(118) and (121)
a If no failure is found by above checks, this check is not required.
1. Disconnect connector F02 and connect T-adapter to male side
furthermore.
Between F02 (male) (2) and each of CP02 (female)
(116), (118), and (121)
Resistance
Between F04 (male) (1) and terminal R03 (M)
40 Troubleshooting
Troubleshooting by failure code (Display of code)
(PC88MR-
20 to 30 V
20 to 30 V
Max. 1 z
Max. 1 z
Max. 1 z
40-259