Infiniti G37 Coupe. Manual - part 517

 

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Infiniti G37 Coupe. Manual - part 517

 

 

P0197, P0198 EOT SENSOR

EC-249

< COMPONENT DIAGNOSIS >

[VQ37VHR]

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P0197, P0198 EOT SENSOR

Description

INFOID:0000000001910867

The engine oil temperature sensor is used to detect the engine oil
temperature. The sensor modifies a voltage signal from the ECM.
The modified signal returns to the ECM as the engine oil tempera-
ture input. The sensor uses a thermistor which is sensitive to the
change in temperature. The electrical resistance of the thermistor
decreases as temperature increases.

<Reference data>

*: These data are reference values and are measured between ECM terminal 78
(Engine oil temperature sensor) and ground.

CAUTION:

Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in damage to the ECM’s transis-
tor. Use a ground other than ECM terminals, such as the ground.

DTC Logic

INFOID:0000000001734077

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next test.
1.

Turn ignition switch OFF and wait at least 10 seconds.

2.

Turn ignition switch ON.

3.

Turn ignition switch OFF and wait at least 10 seconds.

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Start engine and wait at least 5 seconds.

SEF594K

Engine oil temperature

°

C (

°

F)

Voltage*

V

Resistance

k

Ω

–10 (14)

4.4

7.0 - 11.4

20 (68)

3.5

2.1 - 2.9

50 (122)

2.2

0.68 - 1.00

90 (194)

0.9

0.236 - 0.260

110 (230)

0.6

0.143 - 0.153

SEF012P

DTC No.

Trouble Diagnosis 

Name

DTC Detecting Condition

Possible Cause

P0197

Engine oil tempera-
ture sensor circuit low 
input

An excessively low voltage from the sensor is 
sent to ECM.

• Harness or connectors

(The sensor circuit is open or shorted.)

• Engine oil temperature sensor

P0198

Engine oil tempera-
ture sensor circuit 
high input

An excessively high voltage from the sensor is 
sent to ECM.

EC-250

< COMPONENT DIAGNOSIS >

[VQ37VHR]

P0197, P0198 EOT SENSOR

2.

Check 1st trip DTC.

Is 1st trip DTC detected?

YES

>> Go to 

EC-250, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000001734078

1.

CHECK GROUND CONNECTION

1.

Turn ignition switch OFF.

2.

Check ground connection M95. Refer to Ground Inspection in 

GI-41, "Circuit Inspection"

.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace ground connection.

2.

CHECK EOT SENSOR POWER SUPPLY CIRCUIT

1.

Disconnect engine oil temperature (EOT) sensor harness connector.

2.

Turn ignition switch ON.

3.

Check the voltage between EOT sensor harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair open circuit or short to ground or short to power in harness or connectors.

3.

CHECK EOT SENSOR GROUND CIRCUIT FOR OPEN AND SHORT

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Check the continuity between EOT sensor harness connector and ECM harness connector.

4.

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

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair open circuit or short to ground or short to power in harness or connectors.

4.

CHECK ENGINE OIL TEMPERATURE SENSOR

Refer to 

EC-250, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Replace engine oil temperature sensor.

5.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-38, "Intermittent Incident"

.

>> INSPECTION END

Component Inspection

INFOID:0000000001910868

1.

CHECK ENGINE OIL TEMPERATURE SENSOR

1.

Turn ignition switch OFF.

EOT sensor

Ground

Voltage

Connector

Terminal

F38

1

Ground

Approx. 5V

EOT sensor

ECM

Continuity

Connector

Terminal

Connector

Terminal

F38

2

F102

84

Existed

P0197, P0198 EOT SENSOR

EC-251

< COMPONENT DIAGNOSIS >

[VQ37VHR]

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2.

Disconnect engine oil temperature sensor harness connector.

3.

Remove engine oil temperature sensor.

4.

Check resistance between engine oil temperature sensor termi-
nals by heating with hot water as shown in the figure.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace engine oil temperature sensor.

Terminals

Condition

Resistance

1 and 2

Temperature

°

C (

°

F)

20 (68)

2.1 - 2.9

k

Ω

50 (122)

0.68 - 1.00

k

Ω

90 (194)

0.236 - 0.260

k

Ω

JMBIA0080ZZ

EC-252

< COMPONENT DIAGNOSIS >

[VQ37VHR]

P0222, P0223, P2132, P2133 TP SENSOR

P0222, P0223, P2132, P2133 TP SENSOR

Description

INFOID:0000000001910837

Electric throttle control actuator consists of throttle control motor,
throttle position sensor, etc. The throttle position sensor responds to
the throttle valve movement. 
The throttle position sensor has two sensors. These sensors are a
kind of potentiometers which transform the throttle valve position into
output voltage, and emit the voltage signal to the ECM. In addition,
these sensors detect the opening and closing speed of the throttle
valve and feed the voltage signals to the ECM. The ECM judges the
current opening angle of the throttle valve from these signals and the
ECM controls the throttle control motor to make the throttle valve
opening angle properly in response to driving condition.

DTC Logic

INFOID:0000000001734081

DTC DETECTION LOGIC

NOTE:
If DTC P0222, P0223, P2132 or P2133 is displayed with DTC P0643, first perform the trouble diagnosis
for DTC P0643. Refer to 

EC-358, "DTC Logic"

.

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next test.
1.

Turn ignition switch OFF and wait at least 10 seconds.

2.

Turn ignition switch ON.

3.

Turn ignition switch OFF and wait at least 10 seconds.

TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 10V at idle.

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Start engine and let it idle for 1 second.

2.

Check DTC.

Is DTC detected?

YES

>> Go to 

EC-253, "Diagnosis Procedure"

.

NO

>> INSPECTION END

PBIB0145E

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P0222

Throttle position sensor 
1 (bank 1) circuit low in-
put

An excessively low voltage from the TP sensor 
1 is sent to ECM.

• Harness or connectors

(TP sensor 1 circuit is open or shorted.)

• Electric throttle control actuator

(TP sensor 1)

P0223

Throttle position sensor 
1 (bank 1) circuit high in-
put

An excessively high voltage from the TP sensor 
1 is sent to ECM.

P2132

Throttle position sensor 
1 (bank 2) circuit low in-
put

An excessively low voltage from the TP sensor 
1 is sent to ECM.

P2133

Throttle position sensor 
1 (bank 2) circuit high in-
put

An excessively high voltage from the TP sensor 
1 is sent to ECM.

 

 

 

 

 

 

 

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