Dtc P0100 Mass Or Volume Air Flow Circuit. Corolla Auris

Двигатель. COROLLA, AURIS. ZZE150 ZRE151,152 NDE150
Система Управления Двигателем 1Nd-Tv. COROLLA, AURIS. ZZE150 ZRE151,152 NDE150

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

READ VALUE USING INTELLIGENT TESTER (MASS AIR FLOW RATE)

INSPECT MASS AIR FLOW METER (POWER SOURCE)

INSPECT MASS AIR FLOW METER (VG VOLTAGE)

CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER - ECM)

INSPECT FUSE (EFI NO. 1 FUSE)

CHECK HARNESS AND CONNECTOR (SENSOR GROUND)

CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER - ECM)

DTC P0100 Mass or Volume Air Flow Circuit


DESCRIPTION

The mass air flow meter is a sensor that measures the amount of air flowing through the throttle valve.
The ECM uses this information to determine the fuel injection time and to provide the appropriate air-fuel ratio.
Inside the mass air flow meter, there is a heated platinum wire which is exposed to the flow of intake air.
By applying a specific electrical current to the wire, the ECM heats it to a given temperature. The flow of incoming air cools both the wire and an internal thermistor, affecting their resistance. To maintain a constant current value, the ECM varies the voltage applied to these components in the mass air flow meter. The voltage level is proportional to the airflow through the sensor, and the ECM uses it to calculate the intake air volume.
The circuit is constructed so that the platinum hot wire and the temperature sensor create a bridge circuit, and the power transistor is controlled so that the potentials of A and B remain equal to maintain the predetermined temperature.
УКАЗАНИЕ:
When any of these DTCs are set, the ECM enters fail-safe mode. During fail-safe mode, the ignition timing is calculated by the ECM, according to the engine RPM and throttle valve position. Fail-safe mode continues until a pass condition is detected.

COROLLA, AURIS. ZZE150 ZRE151,152 NDE150.Система Управления Двигателем 1Nd-Tv.Система Ecd. Dtc P0100 Mass Or Volume Air Flow Circuit

УКАЗАНИЕ:
  1. When the mass air flow meter meter output is outside the normal range, the ECM determines this as a malfunction.
  2. DTC P0100 is set while idling for 10 seconds or more after the engine was revved up to 3000 rpm.

DTC No.
DTC Detection Condition
Trouble Area
P0100
Condition (a) or (b) continues for 2.0 seconds or more:
(a) VG less than 0.14 V
(b) VG more than 4.8 V
(The MIL is illuminated and a DTC is immediately set when a malfunction is detected)
  1. Open or short in mass air flow meter circuit
  2. Mass air flow meter
  3. Contamination in mass air flow meter
  4. ECM

УКАЗАНИЕ:
When any of these DTCs are set, check the air-flow rate by selecting the following menu items on an intelligent tester: Powertrain / Engine and ECT / Data List / MAF.

Mass Air Flow Rate (g/sec)
Malfunction
Approximately 0.3 or less
  1. Open in mass air flow meter power source circuit
  2. Open or short in VG circuit
110.0 or more
  1. Open in EVG circuit

WIRING DIAGRAM


COROLLA, AURIS. ZZE150 ZRE151,152 NDE150.Система Управления Двигателем 1Nd-Tv.Система Ecd. Dtc P0100 Mass Or Volume Air Flow Circuit


INSPECTION PROCEDURE

УКАЗАНИЕ:
Read freeze frame data using an intelligent tester. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction.
1.READ VALUE USING INTELLIGENT TESTER (MASS AIR FLOW RATE)

  1. Connect the intelligent tester to the DLC3.

  1. Start the engine.

  1. Turn the tester on.

  1. Enter the following menu items: Powertrain / Engine and ECT / Data List / MAF.

  1. Read the values.

    Result:
    Result
    		Proceed to
    Mass air flow rate is 0.3 g/sec. or less
    		A
    Mass air flow rate is 110.0 g/sec. or more
    		B
    Mass air flow rate is between 1.0 and 109.0 g/sec. (*1)
    		C
    *1: The value must be changed when the throttle valve is opened or closed with the engine running.


B
Перейдите к шагу 6

C
CHECK FOR INTERMITTENT PROBLEMS (Нажмите здесь)
A


2.INSPECT MASS AIR FLOW METER (POWER SOURCE)


    COROLLA, AURIS. ZZE150 ZRE151,152 NDE150.Система Управления Двигателем 1Nd-Tv.Система Ecd. Dtc P0100 Mass Or Volume Air Flow Circuit

  1. Disconnect the mass air flow meter connector.

  1. Turn the ignition switch to the ON position.

  1. Measure the voltage according to the value(s) in the table below.

    Standard voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    B57-1 (+B) - Body ground
    		Ignition switch ON
    		9 to 14 V

  1. Reconnect the mass air flow meter connector.



NG
Перейдите к шагу 5
OK


3.INSPECT MASS AIR FLOW METER (VG VOLTAGE)


    COROLLA, AURIS. ZZE150 ZRE151,152 NDE150.Система Управления Двигателем 1Nd-Tv.Система Ecd. Dtc P0100 Mass Or Volume Air Flow Circuit

  1. Inspect the output voltage.

    1. Remove the mass air flow meter connector.

    2. Apply battery voltage across terminals +B and E2G.

    3. Connect the positive (+) tester probe to terminal VG, and negative (-) tester probe to terminal E2G.

    4. Measure the voltage according to the value(s) in the table below.

      Standard voltage:
      Tester Connection
      		Condition
      		Specified Condition
      B57-3 (VG) - B57-2 (E2G)
      		Battery voltage is applied to terminals +B (+) and E2G (-)
      		0.14 to 4.8 V

    5. Reinstall the mass air flow meter.



NG
REPLACE MASS AIR FLOW METER (Нажмите здесь)
OK


4.CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER - ECM)


    COROLLA, AURIS. ZZE150 ZRE151,152 NDE150.Система Управления Двигателем 1Nd-Tv.Система Ecd. Dtc P0100 Mass Or Volume Air Flow Circuit

  1. Disconnect the mass air flow meter connector.

  1. Disconnect the ECM connector.

  1. Measure the resistance according to the value(s) in the table below.

    Standard resistance (Check for open):
    Tester Connection
    		Condition
    		Specified Condition
    B57-3 (VG) - B77-36 (VG)
    		Always
    		Below 1 Ω
    B57-2 (E2G) - B77-15 (EVG)
    		Always
    		Below 1 Ω
    Standard resistance (Check for short):
    Tester Connection
    		Condition
    		Specified Condition
    B57-3 (VG) or B77-36 (VG) - Body ground
    		Always
    		10 kΩ or higher

  1. Reconnect the mass air flow meter connector.

  1. Reconnect the ECM connector.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (MASS AIR FLOW METER - ECM)
OK

REPLACE ECM (Нажмите здесь)

5.INSPECT FUSE (EFI NO. 1 FUSE)


    COROLLA, AURIS. ZZE150 ZRE151,152 NDE150.Система Управления Двигателем 1Nd-Tv.Система Ecd. Dtc P0100 Mass Or Volume Air Flow Circuit

  1. Remove the EFI No. 1 fuse from the engine room relay block.

  1. Measure the resistance according to the value(s) in the table below.

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    EFI No. 1 fuse
    		Always
    		Below 1 Ω

  1. Reinstall the EFI No. 1 fuse.



NG
REPLACE FUSE (EFI NO. 1 FUSE)
OK

REPAIR OR REPLACE HARNESS AND CONNECTOR (MASS AIR FLOW METER - INTEGRATION RELAY)

6.CHECK HARNESS AND CONNECTOR (SENSOR GROUND)


    COROLLA, AURIS. ZZE150 ZRE151,152 NDE150.Система Управления Двигателем 1Nd-Tv.Система Ecd. Dtc P0100 Mass Or Volume Air Flow Circuit

  1. Disconnect the mass air flow meter connector.

  1. Measure the resistance according to the value(s) in the table below.

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    B57-2 (E2G) - Body ground
    		Always
    		Below 1 Ω

  1. Reconnect the mass air flow meter connector.



NG
Перейдите к шагу 7
OK

REPLACE MASS AIR FLOW METER (Нажмите здесь)

7.CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER - ECM)


    COROLLA, AURIS. ZZE150 ZRE151,152 NDE150.Система Управления Двигателем 1Nd-Tv.Система Ecd. Dtc P0100 Mass Or Volume Air Flow Circuit

  1. Disconnect the mass air flow meter connector.

  1. Disconnect the ECM connector.

  1. Measure the resistance according to the value(s) in the table below.

    Standard resistance (Check for open):
    Tester Connection
    		Condition
    		Specified Condition
    B57-3 (VG) - B77-36 (VG)
    		Always
    		Below 1 Ω
    B57-2 (E2G) - B77-15 (EVG)
    		Always
    		Below 1 Ω
    Standard resistance (Check for short):
    Tester Connection
    		Condition
    		Specified Condition
    B57-2 (E2G) or B77-15 (EVG) - Body ground
    		Always
    		10 kΩ or higher

  1. Reconnect the mass air flow meter connector.

  1. Reconnect the ECM connector.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (MASS AIR FLOW METER - ECM)
OK

REPLACE ECM (Нажмите здесь)