AirMan PDS185S-6E1, Руководство по обслуживанию

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4. Troubleshooting
4-16
No. Item Cause Remedy
J Check engine oil
pressure switch.
When engine oil pressure becomes lower
than 7.1psi(0.049MPa)[0.49bar], contact
becomes off to bring engine to emergency
stop. (Time lag 20 seconds)
Check and confirm in
accordance with the “4.6
Engine Trouble Diagnosis
Function”.
K Check for any defective
wire connection.
Check and make sure that no
disconnection has been found for oil
pressure switch.
Repair disconnection.
L Check coolant
temperature by monitor.
Find out whether actually engine stops
owing to rise of coolant temperature or
owing to defect of electric circuit.
Detect coolant temperature in monitor by
water temperature sensor.
Which is provided by Hokuetsu
Industries Co., Ltd.
Check and confirm in
accordance with the “4.6
Engine Trouble Diagnosis
Function”.
M Check resistance of
water temperature
sensor.
For temperature and resistance
characteristics of water temperature
sensor (Thermistor type), see 3.11.
Which is provided by Hokuetsu
Industries Co., Ltd.
Even disconnection of sensor
or its short-circuit causes
engine to stop.
N Check and confirm that
electrical conductance
exists between water
temperature sensor
emergency controller
CN2-19 and ground
CN2-20 terminal.
In case that no electrical conductance
exists, engine will stop with controller
disconnection detecting function 20
seconds after engine starts.
Repair disconnection.
O Check and confirm that
DC voltage exists
between emergency
controller CN1-5
terminal and grounding.
In case that electrical conductance exists
between emergency controller CN1-5
terminal and grounding though coolant
temperature does not rise abnormally
(higher than 110
℃
), interior contact is
closed. So emergency controller could be
defective.
Replace emergency
controller.
P Faulty of engine cooling
system.
When any trouble is not found in
thermostat, coolant pump can be in
disorder.
For the temperature at
which thermostat valve
opens, see 2.13.
Q Check indicator lamp
wire connection.
It sometimes happens that emergency
stop circuit is active, but warning lamp
will not light on because its circuit is in
trouble. Try to locate its cause.
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