Any Of Work Equipment, Swing And Travel Do Not Operate Or Cannot Be Locked - Komatsu PC200-8M0 Shop Manual

400 Troubleshooting of electrical system (E-mode)
E-20 Any of work equipment, swing and travel do not operate or cannot be locked
E-20 Any of work equipment, swing and travel do not operate or cannot
be locked
Failure 1) All of work equipment, swing, and travel mechanism do not move.
Related infor-
mation
Cause
1 Defective fuse F01-3
Defective lock lever
2 switch (internal open cir-
cuit)
Defective PPC lock sole-
3 noid (open or short circuit
in internal wiring)
Defective diode array D01
4
(Internal short circuit)
Open circuit in wiring har-
ness
5
(wire breakage or defec-
tive contact of connector)
Ground fault in wiring har-
ness
6
(contact with ground cir-
cuit)
PC200, 200LC, 220, 220LC-8M0
Procedure, measuring location, criteria and remarks
If fuse is blown, circuit probably has grounding fault. (See Cause 6.)
1. Turn starting switch to OFF position.
2. Disconnect connector S14 and connect T-adapters to female side.
Between S14 (male) (1) and
(2)
1. Turn starting switch to OFF position.
2. Disconnect connector V01 and connect T-adapters to male side.
Between V01 (male) (1) and (2)
Between V01 (male) (1) and ground
1. Turn starting switch to OFF position.
2. Remove diode array D01 and connect T-adapters to male side.
a Check the continuity in diode range.
Between D01 (male) (8) (+) and (4) (-)
Between D01 (male) (4) (+) and (8) (-)
1. Turn starting switch to OFF position.
2. Set lock lever to FREE position.
3. Remove fuse F01-3.
Between F01-3 and ground (coil resistance of PPC lock
solenoid)
a If no failure is found by above check, this check is not required.
1. Turn starting switch to OFF position.
2. Remove fuse F01-3.
3. Disconnect connectors S14 and V01 and then connect T-adapters to male side of
S14 and female side of V01.
Between F01-3 and S14 (male) (1)
Between S14 (male) (2) and V01 (female) (1)
Between V01 (female) (2) and ground (T09)
1. Turn starting switch to OFF position.
2. Remove fuse F01-3.
3. Disconnect connectors S14, V01, and D01, and then connect T-adapters to male
side of S14 or female side of V01 or D01.
Between ground and F01-3 or S14 (male) (1)
Between ground and S14 (male) (2), V01 (female) (1) or
D01 (female) (4)
Lock lever: LOCK Resistance
Lock lever: FREE Resistance
Resistance
Resistance
Resistance
Resistance
Resistance
Resistance
Resistance
Resistance
SEN06138-00
Min. 1 Mz
Max. 1 z
20 – 60 z
Min. 1 Mz
Continuity
No continuity
20 – 60 z
Max. 1 z
Max. 1 z
Max. 1 z
Min. 1 Mz
Min. 1 Mz
37
40-400