Nissan X-Trail 32. Manual — part 819
SENSOR POWER SUPPLY 2 CIRCUIT
EC-405
< DTC/CIRCUIT DIAGNOSIS >
[MR20DD]
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SENSOR POWER SUPPLY 2 CIRCUIT
Description
INFOID:0000000010775296
ECM supplies a voltage of 5 V to some of the sensors systematically divided into 2 groups, respec-
tively.Accordingly, when a short circuit develops in a sensor power source, a malfunction may occur simulta-
neouslyin the sensors belonging to the same group as the short-circuited sensor.
Sensor power supply 1
• CKP sensor (POS)
• APP sensor 1
• Exhaust valve timing control position sensor
• Electric throttle control actuator
NOTE:
If sensor power supply 1 circuit is malfunctioning, DTC P0643 is displayed.
Sensor power supply 2
• Atmospheric pressure sensor
• Refrigerant pressure sensor
• Fuel rail pressure sensor
• CMP sensor
• APP sensor 2
• Engine oil pressure sensor
Diagnosis Procedure
INFOID:0000000010775297
1.
CHECK ACCELERATOR PEDAL POSITION SENSOR 2 POWER SUPPLY CIRCUIT-1
1.
Turn ignition switch OFF.
2.
Disconnect accelerator pedal position (APP) sensor harness connector.
3.
Turn ignition switch ON.
4.
Check the voltage between APP sensor harness connector and ground.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> GO TO 2.
2.
CHECK ACCELERATOR PEDAL POSITION SENSOR 2 POWER SUPPLY CIRCUIT-2
1.
Turn ignition switch OFF.
2.
Disconnect ECM harness connector.
3.
Check the continuity between APP sensor harness connector and ECM harness connector.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair or replace malfunctioning part.
3.
CHECK SENSOR POWER SUPPLY 2 CIRCUIT
+
−
Voltage
(Approx.)
APP sensor
Connector
Terminal
CVT models
E110
5
Ground
5 V
M/T models
E167
+
−
Continuity
APP sensor
ECM
Connector
Terminal
Connector
Terminal
CVT models
E110
5
E16
118
Existed
M/T models
E167
EC-406
< DTC/CIRCUIT DIAGNOSIS >
[MR20DD]
SENSOR POWER SUPPLY 2 CIRCUIT
Check harness for short to power and short to ground, between the following terminals.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair or replace malfunctioning part.
4.
CHECK COMPONENTS
Check the following.
• Refrigerant pressure sensor (Refer to
)
• Fuel rail pressure sensor (Refer to
EC-260, "Component Inspection"
• Engine oil pressure sensor (Refer to
EC-306, "Component Inspection"
• Atmospheric pressure sensor (Refer to
EC-204, "Component Inspection"
)
• CMP sensor (Refer to
EC-285, "Component Inspection"
)
• Exhaust valve timing control position sensor (Refer to
EC-329, "Component Inspection"
)
Is the inspection result normal?
YES
>> Proceed to
GI-44, "Intermittent Incident"
NO
>> Replace malfunctioning part.
+
−
ECM
Sensor
Connector
Terminal
Name
Connector
Terminal
E16
101
Atmospheric pressure sensor
E67
1
118
APP sensor 2
CVT models
E110
5
M/T models
E167
F7
23
Refrigerant pressure sensor
F42
3
Engine oil pressure sensor
F106
3
Fuel rail pressure sensor
F62
1
43
CMP sensor
F105
1
REFRIGERANT PRESSURE SENSOR
EC-407
< DTC/CIRCUIT DIAGNOSIS >
[MR20DD]
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REFRIGERANT PRESSURE SENSOR
Component Function Check
INFOID:0000000010775298
1.
CHECK REFRIGERANT PRESSURE SENSOR FUNCTION
1.
Start engine and warm it up to normal operating temperature.
2.
Turn A/C switch and blower fan switch ON.
3.
Check the voltage between ECM harness connector terminals under the following conditions.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Proceed to
.
Diagnosis Procedure
INFOID:0000000010775299
1.
CHECK REFRIGERANT PRESSURE SENSOR POWER SUPPLY
1.
Turn ignition switch OFF.
2.
Disconnect refrigerant pressure sensor harness connector.
3.
Turn ignition switch ON.
4.
Check the voltage between refrigerant pressure sensor harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> GO TO 2.
2.
CHECK REFRIGERANT PRESSURE SENSOR POWER SUPPLY CIRCUIT
1.
Turn ignition switch ON.
2.
Disconnect ECM harness connector.
3.
Check the continuity between refrigerant pressure sensor harness connector and ECM harness connec-
tor.
4.
Also check harness for short to power.
Is the inspection result normal?
YES
>> Perform trouble diagnosis for power supply circuit.
NO
>> Repair or replace malfunctioning part.
3.
CHECK REFRIGERANT PRESSURE SENSOR GROUND CIRCUIT
1.
Check the continuity between refrigerant pressure sensor harness connector and ECM harness connec-
tor.
ECM
Voltage
Connector
+
–
Terminal
F7
34
39
1.0 - 4.0 V
+
−
Voltage
(Approx.)
Refrigerant pressure sensor
Connector
Terminal
F42
3
Ground
5 V
+
−
Continuity
Refrigerant pressure sensor
ECM
Connector
Terminal
Connector
Terminal
F42
3
F7
23
Existed
EC-408
< DTC/CIRCUIT DIAGNOSIS >
[MR20DD]
REFRIGERANT PRESSURE SENSOR
2.
Also check harness for short to power.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair or replace malfunctioning part.
4.
CHECK REFRIGERANT PRESSURE SENSOR INPUT SIGNAL CIRCUIT
1.
Check the continuity between refrigerant pressure sensor harness connector and ECM harness connec-
tor.
2.
Also check harness for short to power.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Repair or replace malfunctioning part.
5.
CHECK INTERMITTENT INCIDENT
Check intermittent incident. Refer to
GI-44, "Intermittent Incident"
.
Is the inspection result normal?
YES
>> Replace refrigerant pressure sensor. Refer to
HAC-225, "Removal and Installation"
NO
>> Repair or replace malfunctioning part.
+
−
Continuity
Refrigerant pressure sensor
ECM
Connector
Terminal
Connector
Terminal
F42
1
F7
39
Existed
+
−
Continuity
Refrigerant pressure sensor
ECM
Connector
Terminal
Connector
Terminal
F42
2
F7
34
Existed
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