Dtc P0101 Mass Or Volume Air Flow Circuit Range / Performance Problem

Engine Hybrid System. Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25
1Kd-Ftv Engine Control. Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25

DESCRIPTION

INSPECTION PROCEDURE

CHECK OTHER DTC OUTPUT (IN ADDITION TO DTC P0101)

CHECK FREEZE FRAME DATA (MASS AIR FLOW RATE AND ENGINE SPEED)

READ VALUE USING INTELLIGENT TESTER (MASS AIR FLOW RATE AND ENGINE SPEED)

REPLACE MASS AIR FLOW METER

CHECK DTC OUTPUT

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

REPLACE ECM

READ VALUE USING INTELLIGENT TESTER (MASS AIR FLOW RATE AND ENGINE SPEED)

READ VALUE USING INTELLIGENT TESTER (MAP AND ATMOSPHERIC PRESSURE)

CHECK AIR INDUCTION SYSTEM

READ VALUE USING INTELLIGENT TESTER (INTAKE AIR AND INTAKE AIR TEMP (TURBO))

INSPECT ELECTRIC EGR CONTROL VALVE ASSEMBLY

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

REPLACE MASS AIR FLOW METER

CHECK DTC OUTPUT

INSPECT INTAKE AIR TEMPERATURE SENSOR (TURBO)

INSPECT ELECTRIC EGR CONTROL VALVE ASSEMBLY

REPLACE MASS AIR FLOW METER

CHECK DTC OUTPUT

REPAIR OR REPLACE AIR INDUCTION SYSTEM

REPLACE ELECTRIC EGR CONTROL VALVE ASSEMBLY

REPLACE ECM

REPLACE MANIFOLD ABSOLUTE PRESSURE SENSOR

REPLACE INTAKE AIR TEMPERATURE SENSOR (TURBO)

REPAIR OR REPLACE HARNESS OR CONNECTOR

CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

DTC P0101 Mass or Volume Air Flow Circuit Range / Performance Problem


DESCRIPTION

Refer to DTC P0100 (HILUX_TGN26 RM00000187J04HX_01.html).

P0101
DTC Detection Drive Pattern
DTC Detection Condition
Trouble Area
After the engine is completely warmed up, perform the following procedure 3 times: from a vehicle speed of 60 km/h (37 mph), accelerate the vehicle to 80 km/h (50 mph), quickly release the accelerator pedal and do not depress it for 7 seconds or more.
After performing the above procedure, immediately stop the vehicle and confirm that "Exhaust Temperature B1S2" displays 300°C (572°F) or higher using the intelligent tester.
After the engine is completely warmed up, while the accelerator pedal is released for 7 seconds or more and the vehicle is decelerating, the intake air volume is higher or lower than the threshold* (EGR valve fully closed and throttle valve is fully open).
(2 trip detection logic)
  1. Mass air flow meter
  2. Intake air temperature sensor (turbo)
  3. Manifold absolute pressure sensor
  4. Electric EGR control valve assembly
  5. ECM
  6. Open or short in mass air flow meter circuit
*: There is a threshold for a low air flow rate malfunction and high air flow rate malfunction. The threshold is different depending on the values of "Engine Speed", "MAP" and "Intake Air Temp (Turbo)".
HINT:
  1. Low air flow rate malfunction: For example when vehicle deceleration if "MAF" is 20 gm/s or less, low air flow malfunction is confirmed (at "Engine Speed" is 1600 rpm, "MAP" is 110 kPa and "Intake Air Temp (Turbo)" is 35°C).
  2. High air flow rate malfunction: For example when vehicle deceleration if "MAF" is 42 gm/s or more, high air flow malfunction is confirmed (at "Engine Speed" is 1600 rpm, "MAP" is 110 kPa and "Intake Air Temp (Turbo)" is 35°C).

Related Data List
DTC No.
Data List
P0101
  1. MAF
  2. MAP
  3. Engine Speed
  4. Intake Air Temp (Turbo)
  5. Target EGR Position
  6. Actual EGR Valve Pos.
  7. EGR Close Lrn. Status
  8. Exhaust Temperature B1S2
HINT:
If DTC P0101 is stored, either of the following symptoms may appear:
  1. As the ECU mistakenly determines that there is less air than the actual intake air amount, EGR is decreased to match the target EGR.
    1. Combustion noise worsens
  2. As the ECU mistakenly determines that there is more air than the actual intake air amount, EGR is increased to match the target EGR:
    1. Misfire
    2. White smoke
    3. Black smoke

INSPECTION PROCEDURE

NOTICE:
  1. Inspect the fuses of circuits related to this system before performing the following inspection procedure.
  2. After replacing the ECM, the new ECM needs registration (HILUX_TGN26 RM0000012XK058X.html) and initialization (HILUX_TGN26 RM000000TIN056X.html).
  3. After replacing the fuel supply pump assembly, the ECM needs initialization (HILUX_TGN26 RM000000TIN056X.html).
  4. After replacing an injector assembly, the ECM needs registration (HILUX_TGN26 RM0000012XK058X.html).
HINT:
Read freeze frame data using the intelligent tester. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, and other data from the time the malfunction occurred.
1.CHECK OTHER DTC OUTPUT (IN ADDITION TO DTC P0101)

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch to ON and turn the tester on.

  1. Enter the following menus: Powertrain / Engine and ECT / DTC.

  1. Read the DTCs.

    Result
    Result
    		Proceed to
    P0101 and other DTCs are output
    		A
    P0101 is output
    		B
    HINT:
    If codes other than P0101 are output, perform troubleshooting for those DTCs first.


A
GO TO DTC CHART (HILUX_TGN26 RM0000031HW030X.html)
B


2.CHECK FREEZE FRAME DATA (MASS AIR FLOW RATE AND ENGINE SPEED)

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch to ON.

  1. Turn the tester on.

  1. Enter the following menus: Powertrain / Engine and ECT / DTC.

  1. Check the freeze frame data.

    Result
    Result
    		Proceed to
    1. Engine speed 1350 rpm or less
    2. MAF 246.0 gm/s or more
    		A
    1. Engine speed 1350 rpm or more
    2. MAF 0.03 gm/s or less
    Except above
    		B


B
Go to step 8
A


3.READ VALUE USING INTELLIGENT TESTER (MASS AIR FLOW RATE AND ENGINE SPEED)

  1. Connect the intelligent tester to the DLC3.

  1. Start the engine and turn the tester on.

  1. Enter the following menus: Powertrain / Engine and ECT / Data List / MAF and Engine speed.

  1. Read the value.

    Standard:
    Engine speed
    		MAF
    0 rpm
    		0.5 gm/s or less
    700 to 800 rpm
    		100 gm/s or less
    3000 rpm
    		1 gm/s or more


NG
Go to step 13
OK


4.REPLACE MASS AIR FLOW METER

  1. Replace the mass air flow meter (HILUX_TGN26 RM000000VHD04EX.html).

    HINT:
    If foreign matter is stuck inside the mass air flow meter, the output characteristics of the mass air flow meter may change, resulting in a malfunction.

NEXT


5.CHECK DTC OUTPUT

  1. Connect the intelligent tester to the DLC3.

  1. Clear the DTCs (HILUX_TGN26 RM000000PDK0X2X.html).

  1. Turn the ignition switch off for 30 seconds or more.

  1. Start the engine.

  1. After the engine is completely warmed up, perform the following procedure 3 times with the A/C off: from a vehicle speed of 60 km/h (37 mph), accelerate the vehicle to 80 km/h (50 mph), quickly release the accelerator pedal and do not depress it for 7 seconds or more.

  1. Stop the vehicle immediately after completing the above procedure.

  1. Connect the intelligent tester to the DLC3.

  1. Enter the following menus: Powertrain / Engine and ECT / Data List / Exhaust Temperature B1S2.

    HINT:
    1. "Exhaust Temperature B1S2" must be 300°C or more.
    2. If "Exhaust Temperature B1S2" is less than 300°C (572°F), perform the DTC detection drive pattern again, increasing the vehicle speed so that the exhaust gas temperature increases.

  1. Enter the following menus: Powertrain / Engine and ECT / DTC.

  1. Read the pending DTCs.

    HINT:
    1. If no pending DTCs are output, proceed to the next step to check "All Readiness".
    2. Perform the following procedure using the tester to determine whether or not the DTC judgment has been carried out.

    1. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.

    2. Input DTC P0101.

    3. Check the DTC judgment result.

      Result
      Tester Display
      		Result
      		Proceed to
      Pending DTC
      		P0101 is output
      		B
      All Readiness
      		NORMAL
      		A
      ABNORMAL
      		B
      HINT:
      If STATUS is INCOMPLETE or N/A, perform the following procedure again 3 times with the A/C off: from a vehicle speed of 60 km/h (37 mph), accelerate the vehicle to 80 km/h (50 mph), quickly release the accelerator pedal and do not depress it for 7 seconds or more.


A
END
B


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

  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:

    Tester Connection
    		Condition
    		Specified Condition
    C115-5 (FG) - C113-17 (VG)
    		Always
    		Below 1 Ω
    C115-4 (E2G) - C113-18 (EVG)
    		Always
    		Below 1 Ω
    C115-5 (FG) or C113-17 (VG) - Body ground
    		Always
    		10 kΩ or higher

  1. Reconnect the mass air flow meter connector.

  1. Reconnect the ECM connector.



NG
Go to step 25
OK


7.REPLACE ECM

  1. Replace the ECM (HILUX_TGN26 RM0000013Z001IX.html).



NEXT
Go to step 26

8.READ VALUE USING INTELLIGENT TESTER (MASS AIR FLOW RATE AND ENGINE SPEED)

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch to ON and turn the tester on.

  1. Enter the following menus: Powertrain / Engine and ECT / Data List / MAF and Engine speed.

  1. Read the value.

    Standard:
    Engine speed
    		MAF
    0 rpm
    		0.35 gm/s or less


NG
Go to step 13
OK


9.READ VALUE USING INTELLIGENT TESTER (MAP AND ATMOSPHERIC PRESSURE)

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch to ON and turn the tester on.

  1. Enter the following menus: Powertrain / Engine and ECT / Data List / MAP and Atmospheric Pressure.

  1. Compare the values when the ignition switch is ON.

    Standard:
    Difference between "MAP" and "Atmosphere Pressure" is less than 8 kPa.
    HINT:
    1. If "MAP" and "Atmosphere Pressure" have the same value, both are normal. If there is a difference of 8 kPa or more, compare the values to the atmospheric pressure for that day. The sensor whose deviation is the greatest is malfunctioning.
    2. Standard atmospheric pressure is 101 kPa. For every 100 m increase in altitude, pressure drops by 1 kPa. Varies by weather.


NG
Go to step 23
OK


10.CHECK AIR INDUCTION SYSTEM

  1. Check the air induction system for vacuum leakage (HILUX_TGN26 RM000001A3W02JX_01_0008.html).

    OK:
    No leakage from air induction system.
    HINT:
    1. Check for abnormal disconnection, pipe and hose squashing, and any damage in the intake system.
    2. Using your hand, check whether the pipes and hoses in the intake system are securely connected.
    3. Air leaks from the intake system can be checked by applying soapy water and revving the engine.
    4. Check for any modifications in the intake system made by the user.


NG
Go to step 20
OK


11.READ VALUE USING INTELLIGENT TESTER (INTAKE AIR AND INTAKE AIR TEMP (TURBO))

  1. Connect the intelligent tester to the DLC3.

  1. Soak the engine for a long time.

  1. Turn the ignition switch to ON and turn the tester on.

  1. Enter the following menus: Powertrain / Engine and ECT / Data List / Intake Air, Intake Air Temp (Turbo).

    OK:
    Intake Air is the same as Intake Air Temp (Turbo).


NG
Go to step 16
OK


12.INSPECT ELECTRIC EGR CONTROL VALVE ASSEMBLY

  1. Connect the intelligent tester to the DLC3.

  1. Turn the ignition switch to ON and turn the tester on.

  1. Enter the following menus: Powertrain / Engine and ECT / Active Test / Control the EGR Step Position.

  1. When changing the Active Test continuously value to 0, 30, 60, 90, 60, 30 and 0%, check that Actual EGR Valve Pos. smoothly changes to the set opening angle.

    OK:
    Value smoothly changes to set opening angle.

  1. Enter the following menus: Powertrain / Engine and ECT / Data List / EGR Close Lrn. Status.

  1. Read the values.

    Standard:
    EGR Close Lrn. Status is OK


NG
Go to step 17
OK


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

  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:

    Tester Connection
    		Condition
    		Specified Condition
    C115-5 (FG) - C113-17 (VG)
    		Always
    		Below 1 Ω
    C115-4 (E2G) - C113-18 (EVG)
    		Always
    		Below 1 Ω
    C115-5 (FG) or C113-17 (VG) - Body ground
    		Always
    		10 kΩ or higher

  1. Reconnect the mass air flow meter connector.

  1. Reconnect the ECM connector.



NG
Go to step 25
OK


14.REPLACE MASS AIR FLOW METER

  1. Replace the mass air flow meter (HILUX_TGN26 RM000000VHD04EX.html).

    HINT:
    If foreign matter is stuck inside the mass air flow meter, the output characteristics of the mass air flow meter may change, resulting in a malfunction.

NEXT


15.CHECK DTC OUTPUT

  1. Connect the intelligent tester to the DLC3.

  1. Clear the DTCs (HILUX_TGN26 RM000000PDK0X2X.html).

  1. Turn the ignition switch off for 30 seconds or more.

  1. Start the engine.

  1. After the engine is completely warmed up, perform the following procedure 3 times with the A/C off: from a vehicle speed of 60 km/h (37 mph), accelerate the vehicle to 80 km/h (50 mph), quickly release the accelerator pedal and do not depress it for 7 seconds or more.

  1. Stop the vehicle immediately after completing the above procedure.

  1. Connect the intelligent tester to the DLC3.

  1. Enter the following menus: Powertrain / Engine and ECT / Data List / Exhaust Temperature B1S2.

    HINT:
    1. "Exhaust Temperature B1S2" must be 300°C or more.
    2. If "Exhaust Temperature B1S2" is less than 300°C (572°F), perform the DTC detection drive pattern again, increasing the vehicle speed so that the exhaust gas temperature increases.

  1. Enter the following menus: Powertrain / Engine and ECT / DTC.

  1. Read the pending DTCs.

    HINT:
    1. If no pending DTCs are output, proceed to the next step to check "All Readiness".
    2. Perform the following procedure using the tester to determine whether or not the DTC judgment has been carried out.

    1. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.

    2. Input DTC P0101.

    3. Check the DTC judgment result.

      Result
      Tester Display
      		Result
      		Proceed to
      Pending DTC
      		P0101 is output
      		B
      All Readiness
      		NORMAL
      		A
      ABNORMAL
      		B
      HINT:
      If STATUS is INCOMPLETE or N/A, perform the following procedure again 3 times with the A/C off: from a vehicle speed of 60 km/h (37 mph), accelerate the vehicle to 80 km/h (50 mph), quickly release the accelerator pedal and do not depress it for 7 seconds or more.


B
Go to step 22
A

END

16.INSPECT INTAKE AIR TEMPERATURE SENSOR (TURBO)

  1. Inspect the intake air temperature sensor (turbo) (HILUX_TGN26 RM0000014XN01PX.html).



OK
Go to step 18

NG
Go to step 24

17.INSPECT ELECTRIC EGR CONTROL VALVE ASSEMBLY

  1. Remove the EGR valve assembly (HILUX_TGN26 RM000004QWK009X.html).

  1. Visually check the electric EGR control valve for deposits.
    If there are deposits, clean the electric EGR control valve.

    NOTICE:
    1. When cleaning the electric EGR control valve, make sure the valve is completely closed.
    2. Do not forcibly open the valve, as it may be damaged or deformed.
    3. When cleaning the electric EGR control valve, use a piece of cloth soaked with cleaning solvent. Spraying the solvent directly onto these parts or soaking the parts in the solvent may damage the parts.


    Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.1Kd-Ftv Engine Control.Ecd System (For Dpf). Dtc P0101 Mass Or Volume Air Flow Circuit Range / Performance Problem

  1. Hold the electric EGR control valve up to a light, and then from the side indicated by the arrow in the illustration, visually check that there is no gap between the valve and body.

    OK:
    No light passes through (there is no gap between the valve and body).
    Text in Illustration
    *1
    		Gap
    *a
    		OK
    *b
    		NG
    If light passes through (there is a gap between the valve and body), replace the electric EGR control valve assembly.
    HINT:
    Light passes through part A shown in the illustration even if the valve is completely closed, this is not a problem.


NG
Go to step 21
OK


18.REPLACE MASS AIR FLOW METER

  1. Replace the mass air flow meter (HILUX_TGN26 RM000000VHD04EX.html).

    HINT:
    If foreign matter is stuck inside the mass air flow meter, the output characteristics of the mass air flow meter may change, resulting in a malfunction.

NEXT


19.CHECK DTC OUTPUT

  1. Connect the intelligent tester to the DLC3.

  1. Clear the DTCs (HILUX_TGN26 RM000000PDK0X2X.html).

  1. Turn the ignition switch off for 30 seconds or more.

  1. Start the engine.

  1. After the engine is completely warmed up, perform the following procedure 3 times with the A/C off: from a vehicle speed of 60 km/h (37 mph), accelerate the vehicle to 80 km/h (50 mph), quickly release the accelerator pedal and do not depress it for 7 seconds or more.

  1. Stop the vehicle immediately after completing the above procedure.

  1. Connect the intelligent tester to the DLC3.

  1. Enter the following menus: Powertrain / Engine and ECT / Data List / Exhaust Temperature B1S2.

    HINT:
    1. "Exhaust Temperature B1S2" must be 300°C or more.
    2. If "Exhaust Temperature B1S2" is less than 300°C (572°F), perform the DTC detection drive pattern again, increasing the vehicle speed so that the exhaust gas temperature increases.

  1. Enter the following menus: Powertrain / Engine and ECT / DTC.

  1. Read the pending DTCs.

    HINT:
    1. If no pending DTCs are output, proceed to the next step to check "All Readiness".
    2. Perform the following procedure using the tester to determine whether or not the DTC judgment has been carried out.

    1. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.

    2. Input DTC P0101.

    3. Check the DTC judgment result.

      Result
      Tester Display
      		Result
      		Proceed to
      Pending DTC
      		P0101 is output
      		B
      All Readiness
      		NORMAL
      		A
      ABNORMAL
      		B
      HINT:
      If STATUS is INCOMPLETE or N/A, perform the following procedure again 3 times with the A/C off: from a vehicle speed of 60 km/h (37 mph), accelerate the vehicle to 80 km/h (50 mph), quickly release the accelerator pedal and do not depress it for 7 seconds or more.


B
Go to step 22
A

END

20.REPAIR OR REPLACE AIR INDUCTION SYSTEM

  1. Repair or replace the air induction system.



NEXT
Go to step 26

21.REPLACE ELECTRIC EGR CONTROL VALVE ASSEMBLY

  1. Replace the electric EGR control valve assembly (HILUX_TGN26 RM000004QWK009X.html).



NEXT
Go to step 26

22.REPLACE ECM

  1. Replace the ECM (HILUX_TGN26 RM0000013Z001IX.html).



NEXT
Go to step 26

23.REPLACE MANIFOLD ABSOLUTE PRESSURE SENSOR

  1. Replace the manifold absolute pressure sensor.



NEXT
Go to step 26

24.REPLACE INTAKE AIR TEMPERATURE SENSOR (TURBO)

  1. Replace the intake air temperature sensor (turbo) (HILUX_TGN26 RM0000014XP01HX.html).



NEXT
Go to step 26

25.REPAIR OR REPLACE HARNESS OR CONNECTOR

  1. Repair or replace the harness or connector.


NEXT


26.CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED

  1. Connect the intelligent tester to the DLC3.

  1. Clear the DTCs (HILUX_TGN26 RM000000PDK0X2X.html).

  1. Turn the ignition switch off for 30 seconds or more.

  1. Start the engine.

  1. After the engine is completely warmed up, perform the following procedure 3 times with the A/C off: from a vehicle speed of 60 km/h (37 mph), accelerate the vehicle to 80 km/h (50 mph), quickly release the accelerator pedal and do not depress it for 7 seconds or more.

  1. Stop the vehicle immediately after completing the above procedure.

  1. Connect the intelligent tester to the DLC3.

  1. Enter the following menus: Powertrain / Engine and ECT / Data List / Exhaust Temperature B1S2.

    HINT:
    1. "Exhaust Temperature B1S2" must be 300°C (572°F) or more.
    2. If "Exhaust Temperature B1S2" is less than 300°C (572°F), perform the DTC detection drive pattern again, increasing the vehicle speed so that the exhaust gas temperature increases.

  1. Enter the following menus: Powertrain / Engine and ECT / DTC.

  1. Confirm that the pending DTC is not output again.

    HINT:
    Perform the following procedure using the tester to determine whether or not the DTC judgment has been carried out.

    1. Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.

    2. Input DTC P0101.

    3. Check the DTC judgment result.

      HINT:
      If STATUS is INCOMPLETE or N/A, perform the following procedure again 3 times with the A/C off: from a vehicle speed of 60 km/h (37 mph), accelerate the vehicle to 80 km/h (50 mph), quickly release the accelerator pedal and do not depress it for 7 seconds or more.

NEXT

END