Nissan Frontier D22. Manual - part 561

DTC P0117, P0118 ECT SENSOR

EC-1347

[VG33ER]

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Wiring Diagram

UBS00DTZ

BBWA0508E

EC-1348

[VG33ER]

DTC P0117, P0118 ECT SENSOR

Diagnostic Procedure

UBS00DU0

1. 

CHECK ECTS POWER SUPPLY CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect engine coolant temperature (ECT) sensor harness
connector.

3.

Turn ignition switch ON.

4.

Check voltage between ECT sensor terminal 1 and ground with
CONSULT-II or tester.

OK or NG

OK

>> GO TO 3.

NG

>> GO TO 2.

2. 

DETECT MALFUNCTIONING PART

Check the following.

●

Harness connectors F38, F102

●

Harness for open or short between ECM and engine coolant temperature sensor

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

3. 

CHECK ECT SENSOR GROUND CIRCUIT FOR OPEN AND SHORT

1.

Turn ignition switch OFF.

2.

Check harness continuity between ECT sensor terminal 2 and engine ground.
Refer to Wiring Diagram.

3.

Also check harness for short to power.

OK or NG

OK

>> GO TO 5.

NG

>> GO TO 4.

4. 

DETECT MALFUNCTIONING PART

Check the following.

●

Harness connectors F38, F102

●

Harness for open or short between ECM and engine coolant temperature sensor

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

AEC643A

Voltage: Approximately 5V

SEF206W

Continuity should exist.

DTC P0117, P0118 ECT SENSOR

EC-1349

[VG33ER]

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5. 

CHECK ENGINE COOLANT TEMPERATURE SENSOR

Refer to 

EC-1349, "Component Inspection"

 .

OK or NG

OK

>> GO TO 6.

NG

>> Replace engine coolant temperature sensor.

6. 

CHECK INTERMITTENT INCIDENT

Refer to 

EC-1297, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

 .

>> INSPECTION END.

Component Inspection

UBS00DU1

ENGINE COOLANT TEMPERATURE SENSOR

Check resistance as shown in the figure.

<Reference data>

Removal and Installation

UBS00DU2

ENGINE COOLANT TEMPERATURE SENSOR

Refer to 

EM-80, "OUTER COMPONENT PARTS"

 .

SEF152P

Temperature 

°C (°F)

Resistance k

Ω

20 (68)

2.1 - 2.9

50 (122) 

0.68 - 1.00

90 (194)

0.236 - 0.260

SEF012P

EC-1350

[VG33ER]

DTC P0121 TP SENSOR

DTC P0121 TP SENSOR

PFP:16119

Component Description

UBS00DU3

NOTE:
If DTC P0121 is displayed with DTC P0510, first perform the trouble diagnosis for DTC P0510. Refer to

EC-1580

 .

The throttle position sensor responds to the accelerator pedal movement. This sensor is a kind of potentiome-
ter which transforms the throttle position into output voltage, and emits the voltage signal to the ECM. In addi-
tion, the sensor detects the opening and closing speed of the throttle valve and feeds the voltage signal to the
ECM.
Idle position of the throttle valve is determined by the ECM receiving the signal from the throttle position sen-
sor. This sensor controls engine operation such as fuel cut. On the other hand, the “Wide open and closed
throttle position switch”, which is built into the throttle position sensor unit, is not used for engine control.

CONSULT-II Reference Value in Data Monitor Mode

UBS00DU4

Specification data are reference values.

SEC299C

MONITOR ITEM

CONDITION

SPECIFICATION

THRTL POS SEN

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Engine: After warming up, idle the 
engine

Throttle valve: fully closed

0.15 - 0.85V

●

Engine: After warming up

●

Ignition switch: ON
(Engine stopped)

Throttle valve: fully opened

3.5 - 4.7V

ABSOL TH·P/S

●

Engine: After warming up

●

Ignition switch: ON

●

More than -40.0 kpa (-300 mmHg, 
-11.81 inHg) of vacuum is applied 
to the throttle opener with a hand 
vacuum pump.

Throttle valve: fully closed

0.0%

●

Engine: After warming up

●

Ignition switch: ON
(Engine stopped)

Throttle valve: fully opened

Approx. 80%