Infiniti G37 Coupe. Manual - part 499

P010A MANIFOLD ABSOLUTE PRESSURE SENSOR

EC-177

< COMPONENT DIAGNOSIS >

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P010A MANIFOLD ABSOLUTE PRESSURE SENSOR

Description

INFOID:0000000001736745

The manifold absolute pressure (MAP) sensor is placed at intake
manifold collector. It detects intake manifold pressure and sends the
voltage signal to the ECM.
The sensor uses a silicon diaphragm which is sensitive to the
change in pressure. As the pressure increases, the voltage rises.

DTC Logic

INFOID:0000000001736746

DTC DETECTION LOGIC

NOTE:
If DTC P010A is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643. 
Refer to 

EC-358, "DTC Logic"

.

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING 

If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next test.
1.

Turn ignition switch OFF and wait at least 10 seconds.

2.

Turn ignition switch ON.

3.

Turn ignition switch OFF and wait at least 10 seconds.

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Start engine and let it idle for 10 seconds.

2.

Check DTC.

Is DTC detected?

YES

>> Go to 

EC-177, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000001736747

1.

CHECK GROUND CONNECTION

1.

Turn ignition switch OFF.

2.

Check ground connection M95. Refer to Ground Inspection in 

GI-41, "Circuit Inspection"

.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace ground connection.

2.

CHECK MAP SENSOR POWER SUPPLY CIRCUIT

1.

Disconnect MAP sensor harness connector.

JMBIA0877ZZ

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P010A

Manifold absolute pressure sensor 
circuit

• An excessively low voltage from 

the sensor is sent to ECM.

• An excessively high voltage from 

the sensor is sent to ECM.

• Harness or connectors

(The sensor circuit is open or 
shorted.)

• Manifold absolute pressure (MAP) 

sensor

EC-178

< COMPONENT DIAGNOSIS >

[VQ37VHR]

P010A MANIFOLD ABSOLUTE PRESSURE SENSOR

2.

Turn ignition switch ON.

3.

Check the voltage between MAP sensor harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair open circuit or short to ground or short to power in harness or connectors.

3.

CHECK MAP SENSOR GROUND CIRCUIT FOR OPEN AND SHORT

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Check the continuity between MAP sensor harness connector and ECM harness connector.

4.

Also check harness for short to ground and power.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair open circuit or short to ground or short to power in harness or connectors.

4.

CHECK MAP SENSOR INTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1.

Check the continuity between MAP sensor harness connector and ECM harness connector.

2.

Also check harness for short to ground and power.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair open circuit or short to ground or short to power in harness or connectors.

5.

CHECK MAP SENSOR

Refer to 

EC-178, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Replace MAP sensor.

6.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-38, "Intermittent Incident"

.

>> INSPECTION END

Component Inspection

INFOID:0000000001736748

1.

CHECK MAP SENSOR-I

1.

Turn ignition switch OFF.

2.

Start engine and warm it up to normal operating temperature.

3.

Turn ignition switch OFF, wait at least 5 seconds and then turn ON.

4.

Check the voltage between ECM harness connector terminals as follows.

MAP sensor

Ground

Voltage

Connector

Terminal

F50

1

Ground

Approx. 5V

MAP sensor

ECM

Continuity

Connector

Terminal

Connector

Terminal

F50

3

F102

96

Existed

MAP sensor

ECM

Continuity

Connector

Terminal

Connector

Terminal

F50

2

F101

38

Existed

P010A MANIFOLD ABSOLUTE PRESSURE SENSOR

EC-179

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NOTE:
• To avoid the influence of intake manifold vacuum, check the voltage 1 or more minutes past after engine

is stopped.

• Because the sensor is absolute pressure sensor, output value may differ depending on atmospheric

pressure and altitude.

5.

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.

6.

Check the manifold absolute pressure sensor value corresponding to the atmospheric pressure.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Replace MAP sensor.

2.

CHECK MAP SENSOR-II

1.

Start engine and let it idle.

2.

Check intake manifold vacuum.

3.

Check the voltage between ECM harness connector terminals as follows.

4.

Confirm the difference of the voltage when engine is stopped and at idling is within the values shown in
the following chart.

ECM

+

–

Connector

Terminal

Connector

Terminal

F101

38

F102

96

Altitude

Compensated pressure

0m

0hPa

200m

-24hPa

400m

-47hPa

600m

-70hPa

800m

-92hPa

1000m

-114hPa

1500m

-168hPa

2000m

-218hPa

Atmospheric pressure

Voltage

800hPa

3.1 – 3.7V

850hPa

3.3 – 3.9V

900hPa

3.5 – 4.1V

950hPa

3.8 – 4.3V

1000hPa

4.0 – 4.6V

1050hPa

4.2 – 4.8V

JMBIA0870GB

ECM

+

–

Connector

Terminal

Connector

Terminal

F101

38

F102

96

EC-180

< COMPONENT DIAGNOSIS >

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P010A MANIFOLD ABSOLUTE PRESSURE SENSOR

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace MAP sensor.

Intake manifold vacuum

Voltage difference

-40kPa(-300mmHg)

1.5 – 2.0V

-53.3kPa(-400mmHg)

2.0 – 2.6V

-66.7kPa(-500mmHg)

2.6 – 3.2V

-80kPa(-600mmHg)

3.2 – 3.8V