Nissan X-Trail 32. Manual - part 768

P0102, P0103 MAF SENSOR

EC-201

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

C

D

E

F

G

H

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J

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EC

N

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*: Check for linear voltage rise in response to increase of engine speed.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace mass air flow sensor. Refer to 

EM-30, "Exploded View"

.

ECM

Condition

Voltage

Connector

+

–

Terminal

F7

28

20

Ignition switch ON (Engine stopped.)

Approx. 0.4 V

Idle (Engine is warmed-up to normal 
operating temperature.)

0.7 -1.2 V

Idle to about 4,000 rpm

0.7 -1.2 V 

→

 2.4 V*

EC-202

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

P0107, P0108 ATMOSPHERIC PRESSURE SENSOR

P0107, P0108 ATMOSPHERIC PRESSURE SENSOR

DTC Description

INFOID:0000000010775128

DTC DETECTION LOGIC

POSSIBLE CAUSE

• Harness or connectors
- The atmospheric pressure sensor circuit is open or shorted.
- Sensor power supply circuit 2 is shorted.
• Atmospheric pressure sensor
• Sensor of Sensor power supply circuit 2

FAIL-SAFE

Not applicable

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Start engine and let it idle at least 5 seconds.

2.

Check 1st trip DTC.

Is 1st trip DTC detected?

YES

>> Proceed to 

EC-202, "Diagnosis Procedure"

.

NO-1

>> To check malfunction symptom before repair: Refer to 

GI-44, "Intermittent Incident"

.

NO-2

>> Confirmation after repair: INSPECTION END

Diagnosis Procedure

INFOID:0000000010775129

1.

CHECK ATMOSPHERIC PRESSURE SENSOR POWER SUPPLY-1

1.

Turn ignition switch OFF.

2.

Disconnect atmospheric pressure sensor harness connector.

3.

Turn ignition switch ON.

4.

Check the voltage between atmospheric pressure sensor harness connectors.

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> GO TO 2.

2.

CHECK ATMOSPHERIC PRESSURE SENSOR POWER SUPPLY-2

Check the voltage between atmospheric pressure sensor harness connector and ground.

DTC No.

CONSULT screen terms

(Trouble diagnosis content)

DTC detecting condition

P0107

ABSL PRES SEN/CIRC

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

P0108

ABSL PRES SEN/CIRC

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

Atmospheric pressure sensor

Voltage

Connector

+

–

Terminal

F67

1

3

Approx. 5 V

P0107, P0108 ATMOSPHERIC PRESSURE SENSOR

EC-203

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

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EC

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Is the inspection result normal?

YES

>> GO TO 5.

NO

>> GO TO 3.

3.

CHECK ATMOSPHERIC PRESSURE SENSOR POWER SUPPLY CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Check the continuity between atmospheric pressure sensor harness connector and ECM harness con-
nector.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair or replace malfunctioning part.

4.

CHECK SENSOR POWER SUPPLY 2

Refer to 

EC-405, "Diagnosis Procedure"

.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace malfunctioning part.

5.

CHECK ATMOSPHERIC PRESSURE SENSOR GROUND CIRCUIT FOR OPEN AND SHORT

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Check the continuity between atmospheric pressure sensor harness connector and ECM harness con-
nector.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Repair or replace malfunctioning part.

6.

CHECK ECM GROUND CIRCUIT FOR OPEN AND SHORT

Check the voltage between ECM harness connector and ground.

+

Ground

Voltage

Atmospheric pressure sensor

Connector

Terminal

F67

1

Ground

Approx. 5 V

+

−

Continuity

Atmospheric pressure sen-

sor

ECM

Connector

Terminal

Connector

Terminal

F67

1

E16

101

Existed

+

–

Continuity

Atmospheric pressure sensor

ECM

Connector

Terminal

Connector

Terminal

F67

3

E16

124

Existed

EC-204

< DTC/CIRCUIT DIAGNOSIS >

[MR20DD]

P0107, P0108 ATMOSPHERIC PRESSURE SENSOR

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Repair or replace malfunctioning part.

7.

CHECK ATMOSPHERIC PRESSURE SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1.

Check the continuity between atmospheric pressure sensor 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 8.

NO

>> Repair or replace malfunctioning part.

8.

CHECK ATMOSPHERIC PRESSURE SENSOR

Refer to 

EC-204, "Component Inspection"

.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace atmospheric pressure sensor. Refer to 

EC-28, "ENGINE CONTROL SYSTEM : Compo-

nent Parts Location"

.

Component Inspection

INFOID:0000000010775130

1.

COMPONENT FUNCTION CHECK

1.

Turn ignition switch ON.

2.

Check the voltage between ECM harness connector terminals as follows.

NOTE:
Since this sensor is an absolute pressure sensor, values vary with ambient pressure and altitude.

3.

Measure the atmospheric pressure.
NOTE:
As the atmospheric pressure described on the synoptic chart is the value at sea level, compensate the
pressure with the following chart.

+

Ground

Continuity

ECM

Connector

Terminal

F7

11

Ground

Existed

E16

123

125

128

+

−

Atmospheric pressure sensor

ECM

Continuity

Connector

Terminal

Connector

Terminal

F67

2

E16

97

Existed

ECM

Connector

+

−

Terminal

E16

97

124