Diagnosis Procedure
WARNING: This page is about a different car, the 2019 Infiniti QX60. However, it is still accessible from the selected car via links, so may be relevant.
- CHECK EOT SENSOR POWER SUPPLY
- Disconnect engine oil temperature (EOT) sensor harness connector.
- Turn ignition switch ON.
- Check the voltage between EOT sensor harness connector and ground.
+
-
Voltage
(Approx.)
EOT sensor
Connector
Terminal
F68
1
Ground
5 V
Is the inspection result normal?
YES
GO TO 3.
NO
GO TO 2.
- CHECK EOT SENSOR POWER SUPPLY CIRCUIT
- Turn ignition switch OFF.
- Disconnect ECM harness connector.
- Check the continuity between EOT sensor harness connector and ECM harness connector.
EOT sensor
ECM
Continuity
Connector
Terminal
Connector
Terminal
F68
1
F78
50
Existed
- Also check harness for short to power and short to ground.
Is the inspection result normal?
YES
Perform trouble diagnosis for ECM power supply circuit. Refer to Diagnosis Procedure .
NO
Repair or replace error-detected parts.
- CHECK EOT SENSOR GROUND CIRCUIT
- Turn ignition switch OFF.
- Disconnect ECM harness connector.
- Check the continuity between EOT sensor harness connector and ECM harness connector.
EOT sensor
ECM
Continuity
Connector
Terminal
Connector
Terminal
F68
2
F79
100
Existed
- Also check harness for short to power.
Is the inspection result normal?
YES
GO TO 4.
NO
Repair or replace error-detected parts.
- CHECK ENGINE OIL TEMPERATURE SENSOR
Refer to Component Inspection (Fuel Tank Temperature Sensor) .
Is the inspection result normal?
YES
INSPECTION END
NO
Replace engine oil temperature sensor. Refer to Exploded View .