Nissan Pathfinder. Manual - part 475

 

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Nissan Pathfinder. Manual - part 475

 

 

EC-206

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

P0117, P0118 ECT SENSOR

P0117, P0118 ECT SENSOR

DTC Logic

INFOID:0000000009178132

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. Turn ignition switch ON and wait at least 5 seconds.

2. Check DTC.
Is DTC detected?

YES

>> Proceed to 

EC-206, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000009178133

1.

CHECK ECT SENSOR POWER SUPPLY

1. Disconnect engine coolant temperature (ECT) sensor harness connector.

2. Turn ignition switch ON.

3. Check the voltage between ECT sensor harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 2.

NO

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

2.

CHECK ECT SENSOR GROUND CIRCUIT

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.

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

Possible Cause

P0117

ECT SEN/CIRC
(Engine coolant tempera-
ture sensor 1 circuit low)

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

• Harness or connectors

(The sensor circuit is open or shorted.)

• Engine coolant temperature sensor 

P0118

ECT SEN/CIRC
(Engine coolant tempera-
ture sensor 1 circuit high)

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

ECT sensor

Ground

Voltage

Connector

Terminal

F61

1

Ground

Approx. 5 V

ECT sensor

ECM

Continuity

Connector

Terminal

Connector

Terminal

F61

2

F52

76

Existed

P0117, P0118 ECT SENSOR

EC-207

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

Is the inspection result normal?

YES

>> GO TO 3.

NO

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

3.

CHECK ENGINE COOLANT TEMPERATURE SENSOR

Check engine coolant temperature sensor. Refer to 

EC-207, "Component Inspection"

.

Is the inspection result normal?

YES

>> Check intermittent incident. Refer to 

GI-49, "Intermittent Incident"

.

NO

>> Replace engine coolant temperature sensor. Refer to 

CO-26, "Exploded View"

.

Component Inspection

INFOID:0000000009178134

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. Refer to 

CO-26, "Exploded View"

.

4. Check resistance between engine coolant temperature sensor

terminals as per the following.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace engine coolant temperature sensor. Refer to 

CO-26, "Exploded View"

.

ECT sensor

Condition

Resistance 

(k

Ω)

+

−

Terminal

1

2

Temperature [

°C (°F)]

20 (68)

2.37 - 2.63

50 (122)

0.68 - 1.00

90 (194)

0.236 - 0.260

JMBIA0080ZZ

EC-208

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

P0122, P0123 TP SENSOR

P0122, P0123 TP SENSOR

DTC Logic

INFOID:0000000009178135

DTC DETECTION LOGIC

NOTE:

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

Refer to 

EC-354, "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 8 V 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

>> Proceed to 

EC-208, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000009178136

1.

CHECK THROTTLE POSITION SENSOR 2 POWER SUPPLY

1. Disconnect electric throttle control actuator harness connector.

2. Turn ignition switch ON.

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

Is the inspection result normal?

YES

>> GO TO 2.

NO

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

2.

CHECK THROTTLE POSITION SENSOR 2 GROUND 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.

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

Possible cause

P0122

TP SEN 2/CIRC-B1
(Throttle/Pedal position sen-
sor/switch “A” circuit low)

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

• Harness or connectors

(TP sensor 2 circuit is open or shorted.)

• Electric throttle control actuator

(TP sensor 2)

P0123

TP SEN 2/CIRC-B1
(Throttle/Pedal position sen-
sor/switch “A” circuit high)

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

Electric throttle control actuator

Ground

Voltage

Connector

Terminal

F50

1

Ground

Approx. 5 V

P0122, P0123 TP SENSOR

EC-209

< DTC/CIRCUIT DIAGNOSIS >

[VQ35DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

4. Also check harness for short to ground and short to power.
Is the inspection result normal?

YES

>> GO TO 3.

NO

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

3.

CHECK THROTTLE POSITION SENSOR 2 INPUT SIGNAL CIRCUIT

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

nector.

2. Also check harness for short to ground and short to power.
Is the inspection result normal?

YES

>> GO TO 4.

NO

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

4.

CHECK THROTTLE POSITION SENSOR

Check throttle position sensor. Refer to 

EC-209, "Component Inspection"

.

Is the inspection result normal?

YES

>> Check intermittent incident. Refer to 

GI-49, "Intermittent Incident"

.

NO

>> Replace electric throttle control actuator. Refer to 

EM-26, "Exploded View"

.

Component Inspection

INFOID:0000000009178137

1.

CHECK THROTTLE POSITION SENSOR

1. Turn ignition switch OFF.

2. Reconnect all harness connectors disconnected.

3. Perform 

EC-142, "Work Procedure"

.

4. Turn ignition switch ON.

5. Set selector lever to D position.

6. Check the voltage between ECM harness connector terminals under the following conditions.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace electric throttle control actuator. Refer to 

EM-26, "Exploded View"

.

Electric throttle control actuator

ECM

Continuity

Connector

Terminal

Connector

Terminal

F50

4

F51

19

Existed

Electric throttle control actuator

ECM

Continuity

Connector

Terminal

Connector

Terminal

F50

3

F51

23

Existed

ECM

Condition

Voltage

Connector

+

–

Terminal

F51

22

19

Accelerator pedal

Fully released

More than 0.36 V

Fully depressed

Less than 4.75 V

23

Fully released

Less than 4.75 V

Fully depressed

More than 0.36 V

 

 

 

 

 

 

 

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