Infiniti G35 (V35) Sedan. Manual - part 504

EC-162

< COMPONENT DIAGNOSIS >

[VQ35HR]

P0101, P010B MAF SENSOR

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> GO TO 5.

5.

DETECT MALFUNCTIONING PART

Check the following.
• Harness connectors E106, M6
• Harness connectors M116, F103
• Harness for open or short between mass air flow sensor and ECM
• Harness for open or short between mass air flow sensor and IPDM E/R

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

6.

CHECK MAF SENSOR GROUND CIRCUIT FOR OPEN AND SHORT

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

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

4.

Also check harness for short to ground and short to power.

Is the inspection result normal?

YES

>> GO TO 7.

NO

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

7.

CHECK MAF SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1.

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

2.

Also check harness for short to ground and short to power.

Is the inspection result normal?

YES

>> GO TO 8.

NO

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

8.

CHECK INTAKE AIR TEMPERATURE SENSOR

Check intake air temperature sensor (bank 1).
Refer to 

EC-172, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 9.

NO

>> Replace mass air flow sensor (bank 1) (with intake air temperature sensor).

9.

CHECK EVAP CONTROL SYSTEM PRESSURE SENSOR

Refer to 

EC-298, "Component Inspection"

.

DTC

MAF sensor

Ground

Voltage

Bank

Connector

Terminal

P0101

1

F31

5

Ground

Battery voltage

P010B

2

F42

5

DTC

MAF sensor

ECM

Continuity

Bank

Connector

Terminal

Connector

Terminal

P0101

1

F31

4

F102

68

Existed

P010B

2

F42

4

94

DTC

MAF sensor

ECM

Continuity

Bank

Connector

Terminal

Connector

Terminal

P0101

1

F31

3

F102

77

Existed

P010B

2

F42

3

79

P0101, P010B MAF SENSOR

EC-163

< COMPONENT DIAGNOSIS >

[VQ35HR]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

Is the inspection result normal?

YES

>> GO TO 10.

NO

>> Replace EVAP control system pressure sensor.

10.

CHECK MASS AIR FLOW SENSOR

Refer to 

EC-163, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 11.

NO

>> Replace malfunctioning mass air flow sensor.

11.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-39, "Intermittent Incident"

.

>> INSPECTION END

Component Inspection

INFOID:0000000000956554

1.

CHECK MASS AIR FLOW SENSOR-I

 With CONSULT-III

1.

Turn ignition switch OFF.

2.

Reconnect all harness connectors disconnected.

3.

Start engine and warm it up to normal operating temperature.

4.

Connect CONSULT-III and select “DATA MONITOR” mode.

5.

Select “MAS A/F SE-B1” and “MAS A/F SE-B2”, and check the indication.

*: Check for linear voltage rise in response to engine being increased to about 4,000 rpm.

 Without CONSULT-III

1.

Turn ignition switch OFF.

2.

Reconnect all harness connectors disconnected.

3.

Start engine and warm it up to normal operating temperature.

4.

Check the voltage between ECM harness connector and ground.

*: Check for linear voltage rise in response to engine being increased to about 4,000 rpm.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> GO TO 2.

2.

CHECK FOR THE CAUSE OF UNEVEN AIR FLOW THROUGH MASS AIR FLOW SENSOR

1.

Turn ignition switch OFF.

2.

Check for the cause of uneven air flow through mass air flow sensor. Refer to following.

-

Crushed air ducts

Monitor item

Condition

Indication

MAS A/F SE-B1
MAS A/F SE-B2

Ignition switch ON (Engine stopped.)

Approx. 0.4V

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

0.8 - 1.1V

2,500 rpm (Engine is warmed-up to normal operating temperature.)

1.4 - 1.7V

Idle to about 4,000 rpm

0.8 - 1.1V to Approx. 2.4V*

ECM

Ground

Condition

Voltage

Connector

Terminal

F102

77 [MAF sensor (bank 1) signal]
79 [MAF sensor (bank 2) signal]

Ground

Ignition switch ON (Engine stopped.)

Approx. 0.4V

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

0.8 - 1.1V

2,500 rpm (Engine is warmed-up to normal 
operating temperature.)

1.4 - 1.7V

Idle to about 4,000 rpm

0.8 - 1.1V to Approx. 2.4V*

EC-164

< COMPONENT DIAGNOSIS >

[VQ35HR]

P0101, P010B MAF SENSOR

-

Malfunctioning seal of air cleaner element

-

Uneven dirt of air cleaner element

-

Improper specification of intake air system parts

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> GO TO 3.

3.

CHECK MASS AIR FLOW SENSOR-II

 With CONSULT-III

1.

Repair or replace malfunctioning part.

2.

Start engine and warm it up to normal operating temperature.

3.

Connect CONSULT-III and select “DATA MONITOR” mode.

4.

Select “MAS A/F SE-B1” and “MAS A/F SE-B2”, and check the indication.

*: Check for linear voltage rise in response to engine being increased to about 4,000 rpm.

 Without CONSULT-III

1.

Repair or replace malfunctioning part.

2.

Start engine and warm it up to normal operating temperature.

3.

Check the voltage between ECM harness connector and ground.

*: Check for linear voltage rise in response to engine being increased to about 4,000 rpm.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> GO TO 4.

4.

CHECK MASS AIR FLOW SENSOR-III

 With CONSULT-III

1.

Turn ignition switch OFF.

2.

Disconnect mass air flow sensor harness connector and reconnect it again.

3.

Start engine and warm it up to normal operating temperature.

4.

Connect CONSULT-III and select “DATA MONITOR” mode.

5.

Select “MAS A/F SE-B1” and “MAS A/F SE-B2”, and check the indication.

*: Check for linear voltage rise in response to engine being increased to about 4,000 rpm.

 Without CONSULT-III

Monitor item

Condition

Indication

MAS A/F SE-B1
MAS A/F SE-B2

Ignition switch ON (Engine stopped.)

Approx. 0.4V

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

0.8 - 1.1V

2,500 rpm (Engine is warmed-up to normal operating temperature.)

1.4 - 1.7V

Idle to about 4,000 rpm

0.8 - 1.1V to Approx. 2.4V*

ECM

Ground

Condition

Voltage

Connector

Terminal

F102

77 [MAF sensor (bank 1) signal]
79 [MAF sensor (bank 2) signal]

Ground

Ignition switch ON (Engine stopped.)

Approx. 0.4V

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

0.8 - 1.1V

2,500 rpm (Engine is warmed-up to normal 
operating temperature.)

1.4 - 1.7V

Idle to about 4,000 rpm

0.8 - 1.1V to Approx. 2.4V*

Monitor item

Condition

Indication

MAS A/F SE-B1
MAS A/F SE-B2

Ignition switch ON (Engine stopped.)

Approx. 0.4V

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

0.8 - 1.1V

2,500 rpm (Engine is warmed-up to normal operating temperature.)

1.4 - 1.7V

Idle to about 4,000 rpm

0.8 - 1.1V to Approx. 2.4V*

P0101, P010B MAF SENSOR

EC-165

< COMPONENT DIAGNOSIS >

[VQ35HR]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

1.

Turn ignition switch OFF.

2.

Disconnect mass air flow sensor harness connector and reconnect it again.

3.

Start engine and warm it up to normal operating temperature.

4.

Check the voltage between ECM harness connector and ground.

*: Check for linear voltage rise in response to engine being increased to about 4,000 rpm.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Clean or replace malfunctioning mass air flow sensor.

ECM

Ground

Condition

Voltage

Connector

Terminal

F102

77 [MAF sensor (bank 1) signal]
79 [MAF sensor (bank 2) signal]

Ground

Ignition switch ON (Engine stopped.)

Approx. 0.4V

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

0.8 - 1.1V

2,500 rpm (Engine is warmed-up to normal 
operating temperature.)

1.4 - 1.7V

Idle to about 4,000 rpm

0.8 - 1.1V to Approx. 2.4V*