Failure Code [B@Bczk] Radiator Coolant Level Low - Komatsu PC200-8M0 Shop Manual

SEN06133-00

Failure code [B@BCZK] Radiator Coolant Level Low

Action
Failure code
level
L01 B@BCZK
q
While starting switch is at ON position (with engine stopped) or engine is running, radiator coolant
Detail of failure level switch signal voltage does not remain below 1 V, so machine monitor determines that radiator
coolant level is low (sensor contact is open).
Action of con-
q
Displays radiator coolant level monitor yellow on machine monitor.
troller
Problem on
q
If machine is operated as it is, engine may overheat.
machine
q
Input (ON/OFF) from radiator coolant level switch can be checked with monitoring function.
Related infor-
(Code: 04500 Monitor input 1)
mation
q
Method of reproducing failure code: Turn starting switch to ON position.
Cause
Lowered radiator coolant level
1
(when system works properly)
Defective coolant level switch
2
(internal defect)
Open circuit in wiring harness
3 (Wire breakage or defective con-
tact)
4 Defective machine monitor
16
40-301
Radiator Coolant Level Low
Failure
(Machine monitor system)
Procedure, measuring location, criteria and remarks
Check radiator sub tank for lowering of coolant level. If coolant level is low, add
coolant.
1. Turn starting switch to OFF position.
2. Disconnect connector P24 and connect T-adapters to male side.
Between P24 (male) (1) and (2)
1. Turn starting switch to OFF position.
2. Disconnect connectors CM02 and P24, and connect T-adapters to each
female side.
a Add coolant.
Between CM02 (female) (3) and P24 (female) (1)
If no failure is found by above checks, machine monitor is defective.
q
Reference
1. Turn starting switch to OFF position.
2. Insert T-adapters into connector CM02.
3. Turn starting switch to ON position.
Between CM02 (3) and CM01 (3)
301 Troubleshooting by failure code, Part 1

Failure code [B@BCZK] Radiator Coolant Level Low

Between
FULL and
LOW lines
Below LOW
line
Between
FULL and
LOW lines
Below LOW
line
PC200, 200LC, 220, 220LC-8M0
Max. 1 z
Resistance
Resistance Min. 1 Mz
Max. 1 z
Resistance
Voltage Max. 1 V
Voltage 7 – 11 V