Nissan X-Trail 32. Instruction — part 768
P0102, P0103 MAF SENSOR
EC-201
< DTC/CIRCUIT DIAGNOSIS >
[MR20DD]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
*: 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
.
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
.
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]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
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
.
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
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-
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
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