4. Troubleshooting
4-13
No. Item
Cause
Remedy
J Check engine oil
pressure sensor
Oil pressure sensor detects voltage signal
which engine oil pressure is converted to
and transmitted to engine controller
(ECM)
→
emergency controller.
Check and confirm in
accordance with the “4.6
Engine Trouble Diagnosis
Function”.
K Check for any defective
connection
Check and make sure that no
disconnection has been found for oil
pressure sensor.
Repair disconnection.
L Check engine 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 engine coolant
temperature (ETC)
sensor
Engine coolant temperature (ETC)
sensor is detect by converting into
voltage signal changes the resistance of
the temperature at the thermistor.
Engine maker supply parts.
･
Check and confirm in
accordance with the “4.6
Engine Trouble Diagnosis
Function”.
･
Even disconnection of
sensor or its short-circuit
causes engine to stop.
N Check and confirm that
DC voltage exists
between emergency
controller CN2-14
terminal and ground
If power exists between emergency
controller CN1-3 and grounding, though
no power exists between emergency
controller CN2-14 terminal, the
emergency controller is possibly
defective.
Replace emergency
controller.
O 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, refer to page 2-15.
P Check crankshaft
position sensor (CKP)
Engine speed can be detected being
based on the pulse (4 pulses/1 revolution)
and it is used for fuel injection control.
However it is done, based on CMP signal
if the crankshaft position (CKP) sensor is
faulty.
Check and confirm in
accordance with the “4.6
Engine Trouble Diagnosis
Function”.
Discount-Equipment.com
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