Nissan X-Trail 32. Manual - part 770

P0117, P0118 ECT SENSOR

EC-209

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

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4.

Check the voltage between ECT sensor harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> GO TO 2.

2.

CHECK ENGINE COOLANT TEMPERATURE SENSOR POWER SUPPLY-2

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Check the continuity between ECT 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

>> Perform trouble diagnosis for power supply circuit.

NO

>> Repair or replace malfunctioning part.

3.

CHECK ECT SENSOR GROUND CIRCUIT FOR OPEN AND SHORT

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Check the continuity between ECT 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 or replace malfunctioning part.

4.

CHECK ECT SENSOR

Refer to 

EC-209, "Component Inspection"

.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace ECT sensor. Refer to 

CO-28, "Exploded View"

.

Component Inspection

INFOID:0000000010775136

1.

CHECK ENGINE COOLANT TEMPERATURE SENSOR

1.

Turn ignition switch OFF.

2.

Disconnect engine coolant temperature sensor harness connector.

3.

Remove engine coolant temperature sensor.

+

Ground

Voltage

ECT sensor

Connector

Terminal

F28

1

Ground

Approx. 5 V

+

−

Continuity

ECT sensor

ECM

Connector

Terminal

Connector

Terminal

F28

1

F7

31

Existed

+

−

Continuity

ECT sensor

ECM

Connector

Terminal

Connector

Terminal

F28

2

F7

25

Existed

EC-210

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

P0117, P0118 ECT SENSOR

4.

Check resistance between engine coolant temperature sensor
terminals by heating with hot water as shown in the figure.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace ECT sensor. Refer to 

CO-28, "Exploded View"

.

ECT sensor

Condition

Resistance

+

−

Terminal

1

2

Tempera-
ture [

°

C (

°

F)]

20 (68)

2.37 - 2.63 k

Ω

50 (122)

0.68 - 1.00 k

Ω

90 (194)

0.236 - 0.260 k

Ω

JMBIA0080ZZ

P0122, P0123 TP SENSOR

EC-211

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

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P0122, P0123 TP SENSOR

DTC Description

INFOID:0000000010775137

DTC DETECTION LOGIC

POSSIBLE CAUSE

• Harness or connectors (TP sensor 2 circuit is open or shorted.)
• Electric throttle control actuator (TP sensor 2)

FAIL-SAFE

DTC CONFIRMATION PROCEDURE

1.

CHECK DTC PRIORITY

If DTC P0122 or P0123 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643.
Is applicable DTC detected?

YES

>> Perform diagnosis of applicable. Refer to 

EC-321, "DTC Description"

.

NO

>> GO TO 2.

2.

PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is 8 V or more at idle.

>> GO TO 3.

3.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Start engine and let it idle for 1 second.

2.

Check DTC.

Is DTC detected?

YES

>> Proceed to 

EC-211, "Diagnosis Procedure"

.

NO-1

>> To check malfunction symptom before repair: Refer to 

GI-44, "Intermittent Incident"

.

NO-2

>> Confirmation after repair: INSPECTION END

Diagnosis Procedure

INFOID:0000000010775138

1.

CHECK DTC PRIORITY

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

P0122

TP SEN 2/CIRC-B1
(Throttle/pedal position sensor/switch “A” 
circuit low)

An excessively low voltage from the TP sensor 2 is sent to ECM.

P0123

TP SEN 2/CIRC-B1
(Throttle/pedal position sensor/switch “A” 
circuit high)

An excessively high voltage from the TP sensor 2 is sent to ECM.

Engine operating condition in fail-safe mode

Fail safe mode

Vehicle behavior

Others

• The ECM controls the electric throttle control actuator in regulating the throttle opening in order 

for the idle position to be within +10 degrees.

• The ECM regulates the opening speed of the throttle valve to be slower than the normal con-

dition. So, the acceleration will be poor. 

NOTE:
If throttle position sensor1 and 2 malfunction at the same time conducts following control.
• ECM stops the electric throttle control actuator control, throttle valve is maintained at a fixed 

opening (approx. 5 degrees) by the return spring.

EC-212

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

P0122, P0123 TP SENSOR

If DTC P0122 or P0123 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643.

Is applicable DTC detected?

YES

>> Perform diagnosis of applicable. Refer to 

EC-321, "DTC Description"

.

NO

>> GO TO 2.

2.

CHECK THROTTLE POSITION SENSOR 2 POWER SUPPLY

1.

Turn ignition switch OFF.

2.

Disconnect electric throttle control actuator harness connector.

3.

Turn ignition switch ON.

4.

Check the voltage between electric throttle control actuator harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> GO TO 3.

3.

CHECK THROTTLE POSITION SENSOR 2 POWER SUPPLY CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Check the continuity between electric throttle control actuator harness connector and ECM harness con-
nector.

4.

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

Is the inspection result normal?

YES

>> Perform trouble diagnosis for power supply circuit.

NO

>> Repair or replace malfunctioning part.

4.

CHECK THROTTLE POSITION SENSOR 2 GROUND CIRCUIT FOR OPEN AND SHORT

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Check the continuity between electric throttle control actuator harness connector and ECM harness con-
nector.

4.

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

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair or replace malfunctioning part.

5.

CHECK THROTTLE POSITION SENSOR 2 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1.

Check the continuity between electric throttle control actuator harness connector and ECM harness con-
nector.

+

Ground

Voltage

Electric throttle control actuator

Connector

Terminal

F29

2

Ground

Approx. 5 V

+

−

Continuity

Electric throttle control actu-

ator

ECM

Connector

Terminal

Connector

Terminal

F29

2

F8

60

Existed

+

−

Continuity

Electric throttle control actu-

ator

ECM

Connector

Terminal

Connector

Terminal

F29

4

F8

75

Existed