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Troubleshooting
Diagnostic procedure for check code
Check code Operation cause
[d9] 1. TK2 sensor out of place, miswiring, resistance
Oil temperature (TK2) detection alarm value characteristics error
2. Oil tank peripheral circuit error
Check valve leakage
Capillary blockage
Strainer blockage
[]
Is TK2 sensor out of place ?
Is TK2 sensor in contact
with discharge pipe ?
Is there a leakage or blockage
in the peripheral circuit of the
oil tank ? (*1)
Check interface PC board.
Modify sensor mounting.
Modify miswiring.
TK1 sensor: CN516
TK2 sensor: CN515
TK3 sensor: CN507
Replace leaked/blockage part.
Yes
Yes
Yes
No
Leakage/blockage
No
Is the resistance value
characteristics of TK2 sensor
normal ?
Sensor error.
No
Yes
Is there a miswiring of
TK1/TK2/TK3 sensor ?
Correct the pipe so that the TK2 sensor circuit
does not touch the discharge pipe.
Yes
No
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