Failure Code [D110Kb] Battery Relay Drive Short Circuit - Komatsu PC200-8M0 Shop Manual

SEN06135-00

Failure code [D110KB] Battery Relay Drive Short Circuit

Action
Failure code
level
L01 D110KB
q
Detail of failure Abnormal current flows when outputting 24 V to battery relay primary circuit (coil side).
q
Stops 24 V output to battery relay primary circuit (coil side).
Action of con-
q
Even if cause of failure disappears, machine does not become normal until starting switch is turned
troller
to OFF position.
Problem on
q
Each controller may fail in writing of data into its ROM (non-volatile memory).
machine
q
As T-adapter for pump controller connector is "socket-type box", operating voltage cannot be mea-
sured at pump controller connector.
Related infor-
q
Output state (ON/OFF) to battery relay can be checked with monitoring function.
mation
(Code: 03700 Controller output 1)
q
Method of reproducing failure code: Turn starting switch to ON position, then turn it to OFF position.
Cause
Defective battery relay
1
(Internal short circuit)
Ground fault in wiring harness
2
(contact with ground circuit)
3 Defective pump controller
4
40-303
Failure code [D110KB] Battery Relay Drive Short Circuit
Battery Relay Drive Short Circuit
Failure
(Pump controller system)
Procedure, measuring location, criteria and remarks
1. Turn starting switch to OFF position.
Between terminal R01 and terminal BR
1. Turn starting switch to OFF position.
2. Disconnect negative battery cable (in order not to make short circuit).
3. Disconnect connector R01, terminal R02, and connectors D01, H15 and
C02.
Between terminal R02 (BR) and ground
Between any of terminal R02 (harness side), C02
(female) (108), D01 (female) (1) or (2) and ground
Between D01 (female) (5) and ground
If no failure is found by above checks, pump controller is defective.
q
Reference
1. Turn starting switch to OFF position.
2. Insert T-adapters into connector D01.
3. Turn starting switch to ON position.
4. Measure voltage during 4 to 7seconds after turning starting switch from ON
to OFF position
Between D01 (5) and ground
303 Troubleshooting by failure code, Part 3
Continuity
Resistance Min. 1 Mz
Resistance Min. 1 Mz
Resistance Min. 1 Mz
Voltage
PC200, 200LC, 220, 220LC-8M0
20 to 30 V