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Possible Cause
NHEC0431
I Harness or connectors
(High resistance in the circuit)
I Engine coolant temperature sensor
I Thermostat
SEF174Y
DTC Confirmation Procedure
NHEC0083
CAUTION:
Be careful not to overheat engine.
NOTE:
If “DTC Confirmation Procedure” has been previously conducted,
always turn ignition switch “OFF” and wait at least 10 seconds
before conducting the next test.
WITH CONSULT-II
NHEC0083S01
1) Turn ignition switch “ON”.
2) Select “DATA MONITOR” mode with CONSULT-II.
3) Check that “COOLAN TEMP/S” is above 10°C (50°F).
If it is above 10°C (50°F), the test result will be OK.
If it is below 10°C (50°F), go to following step.
4) Start engine and run it for 65 minutes at idle speed.
If “COOLAN TEMP/S” increases to more than 10°C (50°F)
within 65 minutes, stop engine because the test result will
be OK.
5) If 1st trip DTC is detected, go to “Diagnostic Procedure”,
EC-190.
WITH GST
NHEC0083S02
Follow the procedure “WITH CONSULT-II” above.
DTC P0125 ENGINE COOLANT TEMPERATURE SENSOR (ECTS)
Possible Cause
EC-188
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