Nissan Maxima Service and Repair Manual: P0102, P0103 MAF sensor

Description

Nissan Maxima. P0102, P0103 MAF SENSOR

The mass air flow sensor (1) is placed in the stream of intake air. It measures the intake flow rate by measuring a part of the entire intake flow. The mass air flow sensor controls the temperature of the hot wire to a certain amount. The heat generated by the hot wire is reduced as the intake air flows around it. The greater air flow, the greater the heat loss.

Therefore, the electric current supplied to hot wire is changed to maintain the temperature of the hot wire as air flow increases. The ECM detects the air flow by means of this current change.

DTC Logic

DTC DETECTION LOGIC

Nissan Maxima. DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always perform the following before conducting 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.

2.PERFORM DTC CONFIRMATION PROCEDURE FOR DTC P0102

  1. Start engine and wait at least 5 seconds.
  2. Check DTC.

3.PERFORM DTC CONFIRMATION PROCEDURE FOR DTC P0103-I

  1. Turn ignition switch ON and wait at least 5 seconds.
  2. Check DTC.

4.PERFORM DTC CONFIRMATION PROCEDURE FOR DTC P0103-II

  1. Start engine and wait at least 5 seconds.
  2. Check DTC.

Diagnosis Procedure

Regarding Wiring Diagram information

1.INSPECTION START

Confirm the detected DTC.

2.CHECK INTAKE SYSTEM

Check the following for connection.

  • Air duct
  • Vacuum hoses
  • Intake air passage between air duct to intake manifold

3.CHECK GROUND CONNECTION

  1. Turn ignition switch OFF.
  2. Check ground connection E9.

4.CHECK MAF SENSOR POWER SUPPLY CIRCUIT

Nissan Maxima. CHECK MAF SENSOR POWER SUPPLY CIRCUIT

  1. Disconnect mass air flow (MAF) sensor harness connector.
  2. Turn ignition switch ON.
  3. Check the voltage between MAF sensor harness connector and ground.

Nissan Maxima. CHECK MAF SENSOR POWER SUPPLY CIRCUIT

5.DETECT MALFUNCTIONING PART

Check the following.

  • Harness connectors E11, F2
  • Junction block connectors E44, E45
  • 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

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.

Nissan Maxima. CHECK MAF SENSOR GROUND CIRCUIT FOR OPEN AND SHORT

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.

Nissan Maxima. CHECK MAF SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

8.CHECK MASS AIR FLOW SENSOR

9.CHECK INTERMITTENT INCIDENT

Component Inspection

1.CHECK MASS AIR FLOW SENSOR-I

With CONSULT

  1. Reconnect all harness connectors disconnected.
  2. Start engine and warm it up to normal operating temperature.
  3. Connect CONSULT and select "DATA MONITOR" mode.
  4. Select "MAS A/F SE-B1" and check indication under the following conditions

Nissan Maxima. CHECK MASS AIR FLOW SENSOR-I

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

Without CONSULT

Nissan Maxima. CHECK MASS AIR FLOW SENSOR-I

  1. Reconnect all harness connectors disconnected.
  2. Start engine and warm it up to normal operating temperature.
  3. Check the voltage between ECM harness connector terminals under the following conditions.

Nissan Maxima. CHECK MASS AIR FLOW SENSOR-I

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

2.CHECK FOR THE CAUSE OF UNEVEN AIR FLOW VIA THE MASS AIR FLOW SENSOR

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

  • Crushed air ducts
  • Malfunctioning seal of air cleaner element
  • Uneven dirt of air cleaner element
  • Improper specification of intake air system parts

3.CHECK MASS AIR FLOW SENSOR-II

With CONSULT

  1. Repair or replace malfunctioning part.
  2. Start engine and warm it up to normal operating temperature.
  3. Connect CONSULT and select "DATA MONITOR" mode.
  4. Select "MAS A/F SE-B1" and check indication under the following conditions.

Nissan Maxima. CHECK MASS AIR FLOW SENSOR-II

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

Without CONSULT

Nissan Maxima. CHECK MASS AIR FLOW SENSOR-II

  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 terminals under the following conditions.

Nissan Maxima. CHECK MASS AIR FLOW SENSOR-II

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

4.CHECK MASS AIR FLOW SENSOR-III

With CONSULT

  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 and select "DATA MONITOR" mode.
  5. Select "MAS A/F SE-B1" and check indication under the following conditions.

Nissan Maxima. CHECK MASS AIR FLOW SENSOR-III

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

Without CONSULT

Nissan Maxima. CHECK MASS AIR FLOW SENSOR-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. Check the voltage between ECM harness connector terminals under the following conditions.

Nissan Maxima. CHECK MASS AIR FLOW SENSOR-III

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

    P0101 MAF sensor
    Description   The mass air flow sensor (1) is placed in the stream of intake air. It measures the intake flow rate by measuring a part of the entire intake flow. The mass air flow sensor co ...

    P0111 IAT sensor
    Description The intake air temperature sensor is built-into the mass air flow sensor (1). The sensor detects intake air temperature and transmits a signal to the ECM. The temperature sensi ...

    Other materials:

    B1118 - B1120 satellite sensor LH
    Description DTC B1118 - B1120 SATELLITE SENSOR LH The satellite sensor LH is wired to the air bag diagnosis sensor unit. The air bag diagnosis sensor unit willmonitor the satellite sensor LH for internal failures and its circuits for communication errors. PART LOCATION DTC Logic DTC DETECTI ...

    RGB synchronizing signal circuit
    Description Transmit the RGB synchronizing signal to the display unit so as to synchronize the RGB image displayed with AV control unit. Diagnosis Procedure 1.CHECK CONTINUITY RGB SYNCHRONIZING SIGNAL CIRCUIT Turn ignition switch OFF. Disconnect display unit connector M141 and AV con ...

    Magnet clutch
    Description SYSTEM DESCRIPTION A/C auto amp. controls A/C compressor operation by ambient temperature and signal from ECM. Low Temperature Protection Control A/C auto amp. will turn the A/C compressor ON or OFF as determined by a signal detected by ambient sensor. When ambient temper ...

    Nissan Maxima Owners Manual

    Nissan Maxima Service and Repair Manual

    © 2017-2025 Copyright www.nimainfo.com
    0.0177