Code [352/Ca352] Sensor Sup. 1 Volt. Low Error - Komatsu 114E-3 Series Shop Manual

40 Troubleshooting
E-29 Code [352/CA352] Sensor Sup. 1 Volt. Low Error
Error code Failure code
352
Contents of
• Low voltage is detected in sensor power supply 1 circuit.
trouble
Action of
• Fixes atmospheric pressure and continues operation.
controller
Problem that
• Engine output drops.
appears
• Starting performance is poor.
on machine
Related infor-
• Method of reproducing failure code: 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
114E-3 Series
Trouble
CA352
Causes
Abnormally low level in sensor power supply 1 circuit
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 devices at
right in order. If mark
Atmospheric pres-
E of failure code dis-
appears after repro-
duction operation is
conducted, that
device or wiring
harness has a
defect in it.
Connecting parts among atmospheric pressure sensor, engine wir-
ing harness, and engine controller are suspected. Inspect them
directly.
• Loose connector, broken lock, broken seal
• Corrosive, bent, broken, forced-in, or extended pin
• Humidity in connector, entry of dirt or dust, poor insulation
If causes 1 and 2 are not detected, engine controller may be defec-
tive. (Since trouble is in system, troubleshooting cannot be carried
out.)
SEN00460-01
AMBAIR PRESSURE
sure sensor
Engine wiring
harness
1
J1
5