Nissan Frontier D22. Manual - part 406

 

  Index      Nissan     Nissan Frontier D22 Pickup (1998-2004 year) - Service and Repair Manual

 

Search            

 

 

 

 

 

 

 

 

 

Content   ..  404  405  406  407   ..

 

 

Nissan Frontier D22. Manual - part 406

 

 

DTC P0102, P0103 MAF SENSOR

EC-727

[VG33E]

C

D

E

F

G

H

I

J

K

L

M

A

EC

DTC P0102, P0103 MAF SENSOR

PFP:22680

Component Description

UBS00DGA

The mass air flow sensor is placed in the stream of intake air. It mea-
sures the intake flow rate by measuring a part of the entire intake
flow. It consists of a hot wire that is supplied with electric current from
the ECM. The temperature of the hot wire is controlled by the ECM a
certain amount. The heat generated by the hot wire is reduced as
the intake air flows around it. The more air, the greater the heat loss.
Therefore, the ECM must supply more electric current to maintain
the temperature of the hot wire as air flow increases. The ECM
detects the air flow by means of this current change.

CONSULT-II Reference Value in Data Monitor Mode

UBS00DGB

Specification data are reference values.

On Board Diagnosis Logic

UBS00DGC

FAIL-SAFE MODE

When the malfunction is detected, the ECM enters fail-safe mode and the MIL lights up.

DTC Confirmation Procedure

UBS00DGD

NOTE:
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 5 seconds before conducting the next test.

SEF030T

MONITOR ITEM

CONDITION

SPECIFICATION

MAS A/F SE-B1

Engine: After warming up

Air conditioner switch: OFF

Shift lever: N (A/T), Neutral (M/T)

No load

Idle

1.0 - 1.7V

2,500 rpm

1.7 - 2.3V

CAL/LD VALUE

Engine: After warming up

Air conditioner switch: OFF

Shift lever: N (A/T), Neutral (M/T)

No load

Idle

18.5 - 26.0%

2,500 rpm

18.0 - 21.0%

MASS AIRFLOW

Engine: After warming up

Air conditioner switch: OFF

Shift lever: N (A/T), Neutral (M/T)

No load

Idle

3.3 - 4.8 g·m/s

2,500 rpm

12.0 - 14.9 g·m/s

DTC No.

Trouble diagnosis 

name

DTC detecting condition

Possible cause

P0102

Mass air flow sensor 
circuit low input

An excessively low voltage from the sensor is 
sent to ECM.
This self-diagnosis has the one trip detection 
logic.

Harness or connectors
(The sensor circuit is open or shorted.)

Intake air leaks

Mass air flow sensor

P0103

Mass air flow sensor 
circuit high input

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

Harness or connectors
(The sensor circuit is open or shorted.)

Mass air flow sensor

Detected items

Engine operating condition in fail-safe mode

Mass air flow sensor circuit

Engine speed will not rise more than 2,400 rpm due to the fuel cut.

EC-728

[VG33E]

DTC P0102, P0103 MAF SENSOR

PROCEDURE FOR DTC P0102

 With CONSULT-II

1.

Turn ignition switch ON.

2.

Select “DATA MONITOR” mode with CONSULT-II.

3.

Start engine and wait at least 5 seconds at most.

4.

If DTC is detected, go to 

EC-730, "Diagnostic Procedure"

 .

If DTC is not detected, go to next step.

5.

Start engine and let it idle for at least 6 seconds.

6.

If DTC is detected, go to 

EC-730, "Diagnostic Procedure"

 .

 With GST

Follow the procedure “With CONSULT-II”.

PROCEDURE FOR DTC P0103

 With CONSULT-II

1.

Turn ignition switch ON.

2.

If 1st trip DTC is detected,
Select “DATA MONITOR” mode with CONSULT-II.

3.

Wait at least 6 seconds.

4.

If 1st trip DTC is detected, go to 

EC-730, "Diagnostic Procedure"

.
If 1st trip DTC is not detected, go to next step.

5.

Start engine and let it idle for at least 6 seconds.

6.

If 1st trip DTC is detected, go to 

EC-730, "Diagnostic Procedure"

.

 With GST

Follow the procedure “With CONSULT-II”.

SEF058Y

SEF058Y

DTC P0102, P0103 MAF SENSOR

EC-729

[VG33E]

C

D

E

F

G

H

I

J

K

L

M

A

EC

Wiring Diagram

UBS00DGE

BBWA0470E

EC-730

[VG33E]

DTC P0102, P0103 MAF SENSOR

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 the ECM terminals, such as the ground.

Diagnostic Procedure

UBS00DGF

1. 

INSPECTION START

Which malfunction (P0102 or P0103) is duplicated?

P0102 or P0103

P0102 >> GO TO 2.
P0103 >> GO TO 3.

2. 

CHECK INTAKE SYSTEM

Check the following for connection.

Air duct

Vacuum hoses

Intake air passage between air duct to intake manifold collector

OK or NG

OK

>> GO TO 3.

NG

>> Reconnect the parts.

3. 

RETIGHTEN GROUND SCREWS

1.

Turn ignition switch OFF.

2.

Loosen and retighten engine ground screws.

>> GO TO 4.

TER-

MINAL 

NO.

WIRE 

COLOR

ITEM

CONDITION

DATA (DC Voltage)

54

R

Mass air flow sensor

[Engine is running]

Warm-up condition

Idle speed

1.0 - 1.7V

[Engine is running]

Warm-up condition 

Engine speed is 2,500 rpm

1.7 - 2.3V

55

G

Mass air flow sensor 
ground

[Engine is running]

Warm-up condition

Idle speed

Approximately 0V

BBIA0418E

 

 

 

 

 

 

 

Content   ..  404  405  406  407   ..