LEMON Manuals: Even more car manuals for everyone
Home >> Toyota >> 2018 >> Highlander LE Plus, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 14 (SFI System [2GR-FE] - Diagnostic Codes - (Except Hybrid) (3 Of 5)) >> SFI System >> DTC P0102: Mass Air Flow Circuit Low; DTC P0103: Mass Air Flow Circuit High [12/2013 - 11/2016] >> Procedure

DTC P0102: Mass Air Flow Circuit Low; DTC P0103: Mass Air Flow Circuit High [12/2013 - 11/2016]: Procedure

WARNING: This page is about a different car, the 2016 Toyota Highlander, 2015 Toyota Highlander, and 2014 Toyota Highlander. However, it is still accessible from the selected car via links, so may be relevant.
  1. READ OUTPUT DTC (DTC P0102 OR P0103) 
    1. Connect the Techstream to the DLC3.
    2. Turn the ignition switch to ON.
    3. Turn the Techstream on.
    4. Enter the following menus: Powertrain / Engine / Trouble Codes.
    5. Read the DTCs.

      Powertrain > Engine > Trouble Codes 

      Result Proceed to
      DTC P0102 is output A
      DTC P0103 is output B

    Result: 

    B 

    See step  6

    Result: 

    A 

    See step  2

  2. CHECK TERMINAL VOLTAGE (POWER SOURCE OF MASS AIR FLOW METER SUB-ASSEMBLY) 
    GTY447882Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    *a Front view of wire harness connector
    (to Mass Air Flow Meter Sub-assembly)
    1. Disconnect the mass air flow meter sub-assembly connector.
    2. Turn the ignition switch to ON.
    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      C8-3 (+B) - Body ground Ignition switch ON 11 to 14 V
      Proceed to
      OK
      NG

    Result: 

    NG 

    See step  5

    Result: 

    OK 

    See step  3

  3. CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER SUB-ASSEMBLY - ECM) 
    1. Disconnect the mass air flow meter sub-assembly connector.
    2. Disconnect the ECM connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      C8-5 (VG) - C1-98 (VG) Always Below 1 Ω
      C8-4 (E2G) - C1-130 (E2G) Always Below 1 Ω
      C8-5 (VG) or C1-98 (VG) - Body ground Always 10 kΩ or higher
      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  4

  4. INSPECT MASS AIR FLOW METER SUB-ASSEMBLY 
    1. Inspect the mass air flow meter sub-assembly, referring to the On-vehicle Inspection for Mass Air Flow Meter.

      Refer to ON-VEHICLE INSPECTION [12/2013 - 11/2016]

    2. Inspect the mass air flow meter sub-assembly, referring to the Inspection for Mass Air Flow Meter.

      Refer to INSPECTION [12/2013 - 11/2016]

    3. Inspect the function of the mass air flow meter sub-assembly.
      1. Connect the Techstream to the DLC3.
      2. Turn the ignition switch to ON.
      3. Turn the Techstream on.
      4. Enter the following menus: Powertrain / Engine / Data List / Primary / MAF.

        Powertrain > Engine > Data List 

        Tester Display
        MAF
      5. Start the engine.
      6. Check that the MAF value changes when the engine is raced.

        OK

        The reading changes.

        HINT: 

        Perform "Inspection After Repair" after replacing the mass air flow meter sub-assembly.

        Refer to INITIALIZATION [12/2013 - 11/2016]

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE ECM. 

    Refer to  REMOVAL [12/2013 - 11/2016] 

    Result: 

    NG 

    REPLACE MASS AIR FLOW METER SUB-ASSEMBLY. 

    Refer to  REMOVAL [12/2013 - 11/2016] 

  5. CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER SUB-ASSEMBLY - SEMICONDUCTOR PWR INTEGRATION ECU) 
    1. Disconnect the mass air flow meter sub-assembly connector.
    2. Disconnect the semiconductor pwr integration ECU connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      C8-3 (+B) - 1G-7 Always Below 1 Ω
      C8-3 (+B) or 1G-7 - Body ground Always 10 kΩ or higher
      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE SEMICONDUCTOR PWR INTEGRATION ECU. 

    Refer to  REMOVAL [12/2013 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  6. CHECK HARNESS AND CONNECTOR (SENSOR GROUND) 
    1. Disconnect the mass air flow meter sub-assembly connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      C8-4 (E2G) - Body ground Always Below 1 Ω

      HINT: 

      Perform "Inspection After Repair" after replacing the mass air flow meter sub-assembly.

      Refer to INITIALIZATION [12/2013 - 11/2016]

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE MASS AIR FLOW METER SUB-ASSEMBLY. 

    Refer to  REMOVAL [12/2013 - 11/2016] 

    Result: 

    NG 

    See step  7

  7. CHECK HARNESS AND CONNECTOR (MASS AIR FLOW METER SUB-ASSEMBLY - ECM) 
    1. Disconnect the mass air flow meter sub-assembly connector.
    2. Disconnect the ECM connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      C8-4 (E2G) - C1-130 (E2G) Always Below 1 Ω
      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE ECM. 

    Refer to  REMOVAL [12/2013 - 11/2016] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

scientia non olet · About LEMON Manuals