Failure Code [Ca187] Sens Supply 2 Volt Low Error - Komatsu PC210-8 Shop Manual

UEN00240-01

Failure code [CA187] Sens Supply 2 Volt Low Error

User code Failure code
E15
Contents of
• Low voltage was detected in sensor power supply 2 circuit.
trouble
• Fixes boost pressure value and continues operation.
Action of
• Fixes charge temperature value and continues operation.
controller
• Limits output and continues operation.
Problem that
appears on
• Engine output lowers.
machine
Related infor-
• Method of reproducing failure code: Turn starting switch ON.
mation
Defective sensor or wiring
1
harness
Possible causes
and standard
value in normal
state
Defective wiring harness
2
connector
3 Defective engine controller
42
Trouble
CA187
Cause
Sensor power supply 2 voltage low error
(Engine controller system)
Standard value in normal state/Remarks on troubleshooting
a Disconnect connector with starting switch OFF, then turn starting
switch ON and carry out troubleshooting.
Disconnect sensors
Boost pressure/tem-
and wiring harness at
perature sensor
right in order and
carry out operation to
Common rail pres-
reproduce trouble. If
sure sensor
"E" of failure code
goes off when a sen-
Bkup sensor
sor or wiring harness
is disconnected, that
Engine wiring har-
sensor or wiring har-
ness
ness is defective.
Connecting parts between each sensor – engine wiring harness –
engine controller may be defective. Check them directly.
• Looseness of connector, breakage of lock, or breakage of seal
• Corrosion, bend, breakage, push-in, or expansion of pin
• Moisture or dirt in connector or defective insulation
If causes 1 – 2 are not detected, engine controller may be defective.
(Since trouble is in system, troubleshooting cannot be carried out.)
40 Troubleshooting
1
BOOST PRESS &
IMT
FUEL RAIL PRESS
CAM SENSOR
CE01
PC210, 230, 240-8