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
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),
(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.
>> 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]
C
D
E
F
G
H
I
J
K
L
M
A
ECK
N
P
O
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-
• 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
D
E
F
G
H
I
J
K
L
M
A
ECK
N
P
O
NO
>> Replace malfunctioning component.
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