SEN03842-00
40-320 52 WA250, 250PZ-6
320 Troubleshooting by failure code (Display of code), Part 2
Failure code [CA352] Sensor power supply 1 low error
Failure code [CA352] Sensor power supply 1 low error 1
Action code Failure code
Trouble
Sensor power supply 1 low error
(Engine controller system)
E03 CA352
Contents of
trouble
• Low voltage is detected in sensor power supply 1 (5V) circuit.
Action of
controller
• Fixes atmospheric pressure and continues operation.
• Turns the centralized warning lamp and alarm buzzer ON.
Problem that
appears on
machine
• Starting performance is poor.
• Engine output drops.
Related
information
• Method of reproducing failure code: Turn the starting switch ON.
Possible causes
and standard
value in normal
state
Causes Standard value in normal state/Remarks on troubleshooting
1
Defective sensor or wiring
harness
a Disconnect connector with starting switch OFF, then turn starting
switch ON and carry out troubleshooting.
Disconnect devices at
right in order. If failure
code disappears after
reproduction opera-
tion is conducted, that
device or wiring har-
ness has a defect in
it.
Atmospheric pres-
sure sensor
AMBAIR PRESSURE
Engine wiring
harness
EC1
2
Defective wiring harness
connector
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
3 Defective engine controller
If causes 1 – 2 are not detected, engine controller may be defective.
(Since trouble is in system, troubleshooting cannot be carried out.)
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