Failure Code [Ab00Ke] Charge Voltage Low - Komatsu PC200-8M0 Shop Manual

SEN06133-00

Failure code [AB00KE] Charge Voltage Low

Action
Failure code
level
L03 AB00KE
q
While engine is running, voltage from alternator drops, and machine monitor detects that battery
Detail of failure
charge voltage is low (below 7.8 V).
q
Action of Displays charge level monitor red on machine monitor.
q
machine moni- Even if cause of failure disappears, machine does not become normal until starting switch is turned
tor to OFF position.
Problem on
q
If machine is operated as it is, battery may not be charged.
machine
q
Signal voltage from alternator can be checked with monitoring function.
Related infor-
(Code: 04300 Charge voltage)
mation
q
Method of reproducing failure code: Start engine.
Cause
Loose alternator terminal or open
1
circuit at terminal
Defective generation by alternator
2
(when system is normal)
3 Defective diode
Defective wiring harness or
4
machine monitor
Open circuit in wiring harness
5 (wire breakage or defective con-
tact of connector)
Ground fault in wiring harness
6
(contact with ground circuit)
7 Defective machine monitor
10
40-301
Charging voltage low
Failure
(Machine monitor system)
Procedure, measuring location, criteria and remarks
1. Turn starting switch to OFF position.
2. Check terminal.
1. Turn starting switch to OFF position.
2. Insert T-adapters into connector E12.
3. Start engine.
Between E12 (1) and
ground
1. Turn starting switch to OFF position.
2. Disconnect diode D01 and connect T-adapter to male side.
a Check the continuity in diode range.
Between D01 (male) (2) (+) and (6) (-)
Between D01 (male) (6) (+) and (2) (-)
1. Turn starting switch to OFF position.
2. Insert T-adapter into connector CM01.
3. Start engine.
Between CM01 (16) and ground
a If no failure is found in checks on cause 2, this check is not required.
1. Turn starting switch to OFF position.
2. Disconnect connectors CM01 and E12, and connect T-adapters to each
female side.
Between C0M1 (female) (16) and E12 (female) (1) Resistance
a If no failure is found in checks on cause 2, this check is not required.
1. Turn starting switch to OFF position.
2. Disconnect connectors CM01 and E12, and connect T-adapter to either
female side.
Between CM01 (female) (16) or E12 (female) (1)
and ground
If no failure is found by above checks, machine monitor is defective.
(Since this is an internal defect, troubleshooting cannot be performed.)
301 Troubleshooting by failure code, Part 1

Failure code [AB00KE] Charge Voltage Low

Engine speed: Medium
or higher
Resistance
PC200, 200LC, 220, 220LC-8M0
Voltage 27.5 to 29.5 V
No continuity
Continuity
Voltage 20 to 30 V
Max. 1 z
Min. 1 Mz