Infiniti G35 (V35). Manual - part 332

DTC P0101 MAF SENSOR

EC-209

C

D

E

F

G

H

I

J

K

L

M

A

EC

7.

Maintain the following conditions for at least 10 consecutive sec-
onds.

8.

If 1st trip DTC is detected, go to 

EC-211, "Diagnostic Procedure"

.

Overall Function Check

NBS000P0

PROCEDURE FOR MALFUNCTION B

Use this procedure to check the overall function of the mass air flow sensor circuit. During this check, a 1st trip
DTC might not be confirmed.

 With GST

1.

Start engine and warm it up to normal operating temperature.

2.

Select Service $01 with GST.

3.

Check the mass air flow sensor signal with Service $01.

4.

Check for linear mass air flow sensor signal value rise in
response to increases to about 4,000 rpm in engine speed.

5.

If NG, go to 

EC-211, "Diagnostic Procedure"

 .

ENG SPEED

More than 2,000 rpm

THRTL SEN 1

More than 3V

THRTL SEN 2

More than 3V

Shift lever

Suitable position

Driving location

Driving vehicle uphill (Increased engine load) will help 
maintain the driving conditions required for this test.

PBIB0199E

SEF534P

EC-210

DTC P0101 MAF SENSOR

Wiring Diagram

NBS000P1

TBWM0330E

DTC P0101 MAF SENSOR

EC-211

C

D

E

F

G

H

I

J

K

L

M

A

EC

Specification data are reference values and are measured between each terminal and ground.

CAUTION:

Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.

Diagnostic Procedure

NBS000P2

1. 

INSPECTION START

Which malfunction (A or B) is duplicated?

A or B

A

>> GO  TO  3.

B

>> GO  TO  2.

2. 

CHECK INTAKE SYSTEM

Check the following for connection.

●

Air duct

●

Vacuum hoses

●

Intake air passage between air duct and intake manifold

OK or NG

OK

>> GO TO 3.

NG

>> Reconnect the parts.

TER-

MINAL 

NO.

WIRE 

COLOR

ITEM

CONDITION

DATA (DC Voltage)

51

OR

Mass air flow sensor

[Engine is running]

●

Warm-up condition

●

Idle speed

0.9 - 1.2V

[Engine is running]

●

Warm-up condition

●

Engine speed: 2,500 rpm

1.5 - 1.9V

67

B/W

Sensor ground

[Engine is running]

●

Warm-up condition

●

Idle speed

Approximately 0V

111

W

ECM relay
(Self shut-off)

[Engine is running]
[Ignition switch: OFF]

●

For a few seconds after turning ignition 
switch OFF

0 - 1.5V

[Ignition switch: OFF]

●

More than a few seconds after turning igni-
tion switch OFF

BATTERY VOLTAGE
(11 - 14V)

119

120

P
L

Power supply for ECM

[Ignition switch: ON]

BATTERY VOLTAGE
(11 - 14V)

EC-212

DTC P0101 MAF SENSOR

3. 

CHECK GROUND CONNECTIONS

1.

Turn ignition switch OFF.

2.

Loosen and retighten two ground screws on the body. Refer to 

EC-159, "Ground Inspection"

 .

OK or NG

OK

>> GO TO 4.

NG

>> Repair or replace ground connections.

4. 

CHECK MAF SENSOR POWER SUPPLY CIRCUIT

1.

Disconnect mass air flow (MAF) sensor harness connector.

2.

Turn ignition switch ON.

3.

Check voltage between MAF sensor terminal 2 and ground with
CONSULT-II or tester.

OK or NG

OK

>> GO TO 6.

NG

>> GO TO 5.

5. 

DETECT MALFUNCTIONING PART

Check the following.

●

Harness connectors E12, F3

●

Harness for open or short between IPDM E/R and MAF sensor

●

Harness for open or short between MAF sensor and ECM

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

PBIB2192E

PBIB1077E

Voltage: Battery voltage

PBIB1168E