Nissan Sentra B18 (2020-2025) Service Manual: P0198 Eot Sensor

Nissan Sentra B18 (2020-2025) Service Manual / Engine / Work Procedure (After Replacing Electric Throttle Control Actuator) / Dtc/circuit Diagnosis / P0198 Eot Sensor

Dtc Description

DTC Description

DTC DETECTION LOGIC

DTC	CONSULT screen terms (Trouble diagnosis content)	DTC detection condition
P0198	EOT SEN/CIRC (Engine oil temperature sensor circuit high)	Diagnosis condition	Engine running at idle
		Signal (terminal)	Engine oil temperature sensor signal
		Threshold	An excessively high voltage from the sensor is sent to ECM
		Diagnosis delay time	—

POSSIBLE CAUSE

Harness or connectors (The EOT sensor circuit is open or shorted.)
Engine oil temperature sensor

FAIL-SAFE

Engine Control System

Engine operating condition in fail-safe mode
Fail safe mode		Nissan Sentra Vehicle behavior
Others		Intake and exhaust valve timing control does not function.

Idle Start/Stop System

Not applicable

Confirmation Procedure

Confirmation Procedure

PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always perform the following procedure before conducting the next test.

>>
GO TO 2.
PERFORM DTC CONFIRMATION PROCEDURE
1. Start engine and wait at least 5 seconds.
2. Check 1st trip DTC.
Is 1st trip DTC detected?
YES >>
Proceed to DTC Diagnosis Procedure.
NO-1 >>
To check malfunction symptom before repair: Refer to Intermittent Incident.
NO-2 >>
Confirmation after repair: INSPECTION END

Dtc Diagnosis Procedure

DTC Diagnosis Procedure

CHECK ENGINE OIL TEMPERATURE (EOT) SENSOR POWER SUPPLY-1

Turn ignition switch OFF.
Disconnect EOT sensor harness connector.
Turn ignition switch ON.

Check the voltage between EOT sensor harness connector terminals.

EOT sensor	Voltage (Approx.)
F48	1	2	5 V

EOT sensor

Voltage

(Approx.)

Connector

−

Terminal

F48

5 V

Is the inspection result normal?

YES >>

GO TO 6.

NO >>

GO TO 2.

CHECK EOT SENSOR POWER SUPPLY-2

Check the voltage between EOT sensor harness connector and ground.

+	−	Voltage (Approx.)
F48	1	Ground	5 V

−

Voltage

(Approx.)

EOT sensor

Connector

Terminal

F48

Ground

5 V

Is the inspection result normal?

YES >>

GO TO 4.

NO >>

GO TO 3.

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	Continuity
F48	1	F24	37	Existed

Also check harness for short to ground and short to power.

Is the inspection result normal?

YES >>

Perform trouble diagnosis for ECM power supply circuit. Refer to Diagnosis Procedure.

NO >>

Repair or replace malfunctioning part.

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	Continuity
F48	2	F24	39	Existed

Also check harness for short to power.

Is the inspection result normal?

YES >>

GO TO 5.

NO >>

Repair or replace malfunctioning part.

CHECK ECM GROUND CIRCUIT

Check the continuity between ECM harness connector and ground.

ECM		—	Continuity
Connector	Terminal	—	Continuity
F24	5	Ground	Existed
F24	65
F25	69
E16	157
	159
	162

Also check harness for short to power.

Is the inspection result normal?

YES >>

INSPECTION END

NO >>

Repair or replace malfunctioning part.

CHECK ENGINE OIL TEMPERATURE SENSOR

Refer to Component Inspection.

Is the inspection result normal?
YES >>
INSPECTION END
NO >>
Replace engine oil temperature sensor. Refer to Exploded View.

P0197 Eot Sensor

Dtc Description DTC Description DTC DETECTION LOGIC DTC CONSULT screen terms (Trouble ...

P01f0 Engine Coolant Temperature

Dtc Description DTC Description DTC DETECTION LOGIC DTC CONSULT screen terms (Trouble ...

Other materials:

Dtc Description
DTC Description DTC DETECTION LOGIC DTC No. CONSULT screen terms (Trouble diagnosis name) DTC detection condition ...

B00D5 Passenger air bag OFF Indicator
Description DTC B00D5 FRONT PASSENGER AIR BAG OFF INDICATOR The front passenger air bag off indicator is wired to the air bag diagnosis sensor unit. The air bag diagnosis sensor unit monitors the front passenger air bag off indicator and circuit for failures. PART LOCATION Refer to SRC-5, ...

Precaution
Precautions for Trouble Diagnosis Caution: Follow the instructions listed below. Failure to do this may cause damage to parts: Never apply 7.0 V or more to the measurement terminal. Use a tester with open terminal voltage of 7.0 V or less. Turn the ignition switch off and disconnect the ...