Nissan Qashqai J11. Manual - part 429

ECK-276

< DTC/CIRCUIT DIAGNOSIS >

[K9K]

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 

ECK-275, "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 

ECK-204, "Component Inspection (Throttle Position Sensor)"

 (throttle position sensor), 

ECK-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 

ECK-136, "Work Procedure"

.

>> INSPECTION END

+

-

Continuity

ECM

Electric throttle control actu-

ator

Connector

Terminal

Connector

Terminal

F80

61

F46

2

Existed

67

3

71

4

F81

139

6

140

1

P0641 SENSOR POWER SUPPLY

ECK-277

< DTC/CIRCUIT DIAGNOSIS >

[K9K]

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ECK

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P0641 SENSOR POWER SUPPLY

DTC Logic

INFOID:0000000010289885

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 

ECK-277, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000010289886

1.

CHECK SENSOR POWER SUPPLY

1.

Turn ignition switch ON.

2.

Check the voltage between ECM harness connector and ground.

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

Possible cause

P0641

SEN SUPPLY N1 VOL
(Sensor reference voltage “A” 
circuit/open) 
• 1.DEF: VOLTAGE TOO LOW
• 2.DEF: VOLTAGE TOO 

HIGH

• A voltage of sensor power supply is 5.4 V or 

more.

• A voltage of sensor power supply is 4.6 V or 

less.

• Harness or connectors

(The sensor power supply 1 circuit is 
shorted.)

• High pressure EGR volume control 

valve position sensor

• Throttle position sensor
• TC boost sensor
• Low pressure EGR volume control 

valve position sensor

• Exhaust gas pressure sensor
• Camshaft position sensor
• APP sensor 1
• Refrigerant pressure sensor
• Mass air flow sensor
• ECM

ECK-278

< DTC/CIRCUIT DIAGNOSIS >

[K9K]

P0641 SENSOR POWER SUPPLY

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.

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 

ECK-219, "Diagnosis Procedure"

.

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

ECK-307, "Component Inspection (Low

Pressure EGR Volume Control Valve Motor)"

.

• Exhaust gas pressure sensor. Proceed to 

ECK-244, "Component Inspection (Exhaust Gas Pressure Sen-

sor)"

.

• Camshaft position sensor. Proceed to 

ECK-232, "Component Inspection (Camshaft Position Sensor)"

.

• Mass air flow sensor. Proceed to 

ECK-194, "Component Inspection (Mass Air Flow Sensor)"

.

• Turbocharger boost sensor. Proceed to 

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

.

• Throttle position sensor. Proceed to 

ECK-204, "Component Inspection (Throttle Position Sensor)"

.

• Refrigerant pressure sensor. Proceed to 

ECK-257, "Diagnosis Procedure"

.

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

ECK-240, "Diagnosis Procedure"

.

Is the inspection result normal?

YES

>> Check intermittent incident. Refer to 

GI-41, "Intermittent Incident"

.

+

−

Voltage

(Approx.)

ECM

Connectors

Terminal

E59

27

Ground

5.0 V

F80

41

61

65

69

73

77

F81

97

101

ECM

Sensor

Connector

Terminal

Name

Connector

Terminal

E59

27

Accelerator pedal position sensor (sensor 1)

E20

4

F80

41

Camshaft position sensor

F118

1

61

Electric throttle control actuator

F46

2

65

Low pressure EGR volume control valve position sensor

F34

1

69

High pressure EGR volume control valve position sensor

F60

6

73

Mass air flow sensor

F91

3

77

Exhaust gas pressure sensor

F110

3

F81

97

Refrigerant pressure sensor

E41

3

101

Turbocharger boost sensor

F5

3

P0641 SENSOR POWER SUPPLY

ECK-279

< DTC/CIRCUIT DIAGNOSIS >

[K9K]

C

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A

ECK

N

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O

NO

>> Replace malfunctioning component.