Nissan Qashqai J11. Manual - part 527

EC9-264

< DTC/CIRCUIT DIAGNOSIS >

[R9M]

P0638 ELECTRIC THROTTLE CONTROL ACTUATOR FUNCTION

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair or replace error-detected parts.

4.

DTC CONFIRMATION PROCEDURES

1.

Erase DTC.

2.

Perform DTC confirmation procedure again. Refer to 

EC9-263, "DTC Logic"

.

Is the DTC P0638 displayed again?

YES

>> GO TO 5.

NO

>> Check intermittent incident. Refer to 

GI-41, "Intermittent Incident"

.

5.

CHECK ELECTRIC THROTTLE CONTROL ACTUATOR

Perform 

EC9-206, "Component Inspection (Throttle Position Sensor)"

 (throttle position sensor), 

EC9-363,

"Component Inspection"

 (throttle control motor).

Is the inspection result normal?

YES

>> Check intermittent incident. Refer to 

GI-41, "Intermittent Incident"

.

NO

>> GO TO 6.

6.

REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR

1.

Replace electric throttle control actuator.

2.

Perform 

EC9-149, "Work Procedure"

.

>> INSPECTION END

+

-

Continuity

ECM

Electric throttle control actu-

ator

Connector

Terminal

Connector

Terminal

F83

103

F116

2

Existed

107

3

108

1

140

5

152

4

P0641 SENSOR POWER SUPPLY

EC9-265

< DTC/CIRCUIT DIAGNOSIS >

[R9M]

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EC9

N

P

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P0641 SENSOR POWER SUPPLY

DTC Logic

INFOID:0000000010309226

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 1 minute before conducting the next test.

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Turn ignition switch ON and wait at least 1 second.

2.

Check DTC.

Is DTC detected?

YES

>> Proceed to 

EC9-265, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000010309227

1.

CHECK SENSOR POWER SUPPLY

1.

Turn ignition switch ON.

2.

Check the voltage between ECM harness connector and ground.

Is the inspection result normal?

YES

>> Check intermittent incident. Refer to 

GI-41, "Intermittent Incident"

.

NO

>> GO TO 2.

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

Possible cause

P0641

SEN SUPPLY N-1 VOL
(Sensor reference voltage 
“A” circuit/open) 
• 1.DEF: VOLTAGE TOO 

LOW

• 2.DEF: VOLTAGE TOO 

HIGH

• A voltage of sensor power supply is 5.3 V or more.
• A voltage of sensor power supply is 4.7 V or less.

• Harness or connectors

(The sensor power supply 1 circuit 
is shorted.)

• High pressure EGR volume con-

trol valve position sensor

• Throttle valve position sensor
• Intake manifold runner control 

valve position sensor

• DPF differential pressure sensor
• TC boost sensor
• Low pressure EGR volume control 

valve position sensor

• Camshaft position sensor
• APP sensor 1

+

−

Voltage

(Approx.)

ECM

Connectors

Terminal

E58

27

Ground

5 V

F82

55

59

F83

100

108

112

EC9-266

< DTC/CIRCUIT DIAGNOSIS >

[R9M]

P0641 SENSOR POWER SUPPLY

2.

CHECK SENSOR POWER SUPPLY CIRCUITS

1.

Turn ignition switch OFF.

2.

Check harness for short to power and short to ground, between the following terminals.

Is the inspection result normal?

YES

>> GO TO 3.

NO

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

3.

CHECK COMPONENTS

Check the following.
• Accelerator pedal position sensor (sensor 1). Proceed to 

EC9-365, "Diagnosis Procedure"

.

• Low pressure EGR volume control valve position sensor. Proceed to 

EC9-298, "Component Inspection (Low

Pressure EGR Volume Control Valve Motor)"

.

• Camshaft position sensor. Proceed to 

EC9-230, "Component Inspection (Camshaft Position Sensor)"

.

• Turbocharger boost sensor. Proceed to 

EC9-198, "Component Inspection (Turbocharger Boost Sensor)"

.

• DPF pressure sensor. Proceed to 

EC9-376, "Diagnosis Procedure"

.

• High pressure EGR volume control valve position sensor. Proceed to 

EC9-238, "Diagnosis Procedure"

.

• Throttle valve position sensor. Proceed to 

EC9-206, "Component Inspection (Throttle Position Sensor)"

.

• Intake manifold runner control valve position sensor. Proceed to 

EC9-282, "Diagnosis Procedure"

.

Is the inspection result normal?

YES

>> Check intermittent incident. Refer to 

GI-41, "Intermittent Incident"

.

NO

>> Replace malfunctioning component.

ECM

Sensor

Connector

Terminal

Name

Connector

Terminal

E58

27

Accelerator pedal position sensor (sensor 1)

E20

4

F82

55

Low pressure EGR volume control valve position sensor

F77

1

Camshaft position sensor

F118

1

59

Turbocharger boost sensor

F121

3

F83

100

DPF differential pressure sensor

F120

1

108

High pressure EGR volume position sensor

F14

4

Throttle valve position sensor

F116

1

112

Intake manifold runner control valve position sensor

F107

1

P0651 SENSOR POWER SUPPLY

EC9-267

< DTC/CIRCUIT DIAGNOSIS >

[R9M]

C

D

E

F

G

H

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J

K

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M

A

EC9

N

P

O

P0651 SENSOR POWER SUPPLY

DTC Logic

INFOID:0000000010309231

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 1 minute before conducting the next test.

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Turn ignition switch ON and wait at least 1 second.

2.

Check DTC.

Is DTC detected?

YES

>> Proceed to 

EC9-267, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000010309232

1.

CHECK SENSOR POWER SUPPLY

1.

Turn ignition switch ON.

2.

Check the voltage between ECM harness connector and ground.

Is the inspection result normal?

YES

>> Check intermittent incident. Refer to 

GI-41, "Intermittent Incident"

.

NO

>> GO TO 2.

2.

CHECK SENSOR POWER SUPPLY CIRCUITS

1.

Turn ignition switch OFF.

2.

Check harness for short to power and short to ground, between the following terminals.

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

Possible cause

P0651

SEN SUPPLY N-2 VOL
(Sensor reference voltage 
“B” circuit/open)
• 1.DEF: VOLTAGE TOO 

LOW

• 2.DEF: VOLTAGE TOO 

HIGH

• A voltage of sensor power supply is 5.3 V or 

more.

• A voltage of sensor power supply is 4.7 V or 

less.

• Harness or connectors

(The sensor power supply 2 circuit is 
shorted.)

• Refrigerant pressure sensor
• Exhaust electric throttle control actu-

ator

• DPF differential pressure sensor
• Exhaust gas pressure sensor
• Accelerator pedal position sensor 2

+

−

Voltage

(Approx.)

ECM

Connectors

Terminal

E58

23

Ground

5.0 V

F82

99

F83

100

104