Failure Code [Ddk6Ka] Fnr Lever: Disconnection/Ground Fault - Komatsu WA250-6 Shop Manual

SEN03845-00

Failure code [DDK6KA] FNR lever: Disconnection/Ground fault

Action code Failure code
E03 DDK6KA
Contents of
• No signal of FNR (directional) lever is input because of disconnection or ground fault in FNR (direc-
trouble
tional) lever switch signal system.
• If directional selector switch is not installed, gear is set in neutral.
• If directional selector switch actuation switch is turned OFF, gear is set in neutral (Only machine with
directional selector switch actuation switch).
Action of
• If directional selector switch actuation switch is turned ON, FNR (directional) lever switch controls on
controller
assumption that gear is in neutral (Only machine with directional selector switch actuation switch).
• Turns the centralized warning lamp and alarm buzzer ON.
• Even if trouble disappears, system does not reset itself until FNR (directional) lever is set in N (Neu-
tral).
• Machine cannot be driven with FNR (directional) lever.
Problem that
• Machine can be driven with directional selector switch (only machine with directional selector switch
appears on
actuation switch).
machine
• Gear shift lever position lamp goes off.
• The input state (ON/OFF) from the FNR (directional) lever switch can be checked with the monitoring
Related
function (Code: HST – 40977 – D-IN-0, D-IN-1 or D-IN-2).
information
• Method of reproducing failure code: Turn the starting switch ON and operate FNR (directional) lever
Defective fuse No. 3 of fuse
1
box (FS1)
Defective FNR (directional)
2 lever switch (Internal discon-
nection or short circuit)
Possible causes
and standard
value in normal
state
Defective VIS power supply
3
holding relay (Internal defect)
32
40-350
FNR lever: Disconnection/Ground fault
Trouble
(HST controller system)
Causes
If the fuse is burn, the circuit probably has a grounding fault, etc.
(See cause 5.)
a Prepare with starting switch OFF, then turn starting switch ON
and carry out troubleshooting.
Between (1) and
Between (3) and
Between (2) and
Between (4) and
a Prepare with starting switch OFF, then turn starting switch ON
and carry out troubleshooting.
Replace VIS power
supply holding relay
(L102) with another
relay
a Prepare with starting switch OFF, then carry out troubleshooting
without turning starting switch ON.
350 Troubleshooting by failure code (Display of code), Part 5
Failure code [DDK6KA] FNR lever: Disconnection/Ground fault
Standard value in normal state/Remarks on troubleshooting
FNR (directional)
L15
ground
N (Neutral)
ground
Other than above
F (Forward)
ground
Other than above
R (Reverse)
ground
Other than above
Condition becomes
normal
Condition does not
become normal
Between L102 (male) (1) – (2)
Voltage
lever
Constant 20 – 30 V
20 – 30 V
Max. 1 V
20 – 30 V
Max. 1 V
20 – 30 V
Max. 1 V
Relay (L102) is
defective
Relay (L102) is
normal
Resis-
tance
WA250, 250PZ-6
200 –
400 z