Failure Code [Ab00L6] Alternator R System: Hot Short - Komatsu WA250-6 Shop Manual

SEN03841-00

Failure code [AB00L6] Alternator R system: Hot short

Action code Failure code
E01 AB00L6
Contents of
• When engine is stopped, alternator terminal R input voltage is above 12 V.
trouble
Action of
• Turns the charge circuit error caution lamp ON.
machine monitor
Problem that
appears on
• After the engine is started, just turning on the starting switch runs the service meter.
machine
• The input state (voltage) from the alternator can be checked with the monitoring function (Monitoring
Related
code: HST – 04302 – ALTERNATOR R).
information
• Method of reproducing failure code: Turn the starting switch ON.
Defective alternator
1
(Internal trouble)
Possible causes
and standard
Hot short in wiring harness
value in normal
2
(Contact with 24V circuit)
state
3 Defective machine monitor
8
40-310
Alternator R system: Hot short
Trouble
(Machine monitor system)
Causes
a Prepare with starting switch OFF, then start engine and carry out
troubleshooting.
(female) (1) – ground
a Prepare with starting switch OFF, then turn starting switch ON
and carry out troubleshooting.
Wiring harnesses between E02 (female) (1)
– L25 (female) (18), – circuit branch end and
ground
a Prepare with starting switch OFF, then start engine and carry out
troubleshooting.
Between (18) and
310 Troubleshooting by failure code (Display of code), Part 1
Failure code [AB00L6] Alternator R system: Hot short
Standard value in normal state/Remarks on troubleshooting
Alternator
Running (Throttle:
Wiring harness
Above 1/2)
between E02
Holds in position
L25
(Throttle: Above 1/2)
ground
Holds in position
Engine Voltage
27.5 – 29.5 V
Max. 1.5 V
Voltage
Engine Voltage
Running
27.5 – 29.5 V
Max. 1.5 V
WA250, 250PZ-6
Max. 1 V