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Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 124 (Engine Control System (A25A-FXS) - Diagnostic Codes (P1362-P16B0)) >> SFI System >> DTC P15AD-87: Active Grille Air Shutter "A" Missing Message [10/2021 - 10/2022] >> Procedure

DTC P15AD-87: Active Grille Air Shutter "A" Missing Message [10/2021 - 10/2022]: Procedure

WARNING: This page is about a different variant/trim than selected.
  1. PERFORM UTILITY USING GTS (SWITCH GRILLE SHUTTER CONTROL MODE) 
    1. According to the display on the GTS, change the grille shutter control mode from normal mode to maintenance mode.

      Powertrain > Engine > Utility 

      Tester Display
      Switch Grille Shutter Control Mode

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  2

  2. CHECK HARNESS AND CONNECTOR (SWING GRILLE ACTUATOR ASSEMBLY - ECM) 
    1. Disconnect the swing grille actuator 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
      X1-2 (LIN) - C55-62 (LIN) Always Below 1 Ω
      X1-2 (LIN) or C55-62 (LIN) - Body ground and other terminals Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  3

  3. CHECK TERMINAL VOLTAGE (POWER SOURCE OF SWING GRILLE ACTUATOR ASSEMBLY) 
    GTY1105562Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    *a Front view of wire harness connector
    (to Swing Grille Actuator Assembly)
    1. Disconnect the swing grille actuator 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
      X1-1 (+B) - X1-3 (GND) Ignition switch to ON 11 to 14 V

      HINT: 

      Perform "Switch Grille Shutter Control Mode and Grille Shutter Initialization" after replacing the radiator shutter assembly.

      Refer to INITIALIZATION [10/2021 - ]

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE RADIATOR SHUTTER ASSEMBLY 

    Refer to REMOVAL [10/2021 - ]

    Result: 

    NG 

    See step  4

  4. CHECK HARNESS AND CONNECTOR (SWING GRILLE ACTUATOR ASSEMBLY - BODY GROUND) 
    1. Disconnect the swing grille actuator assembly connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      X1-3 (GND) - Body ground Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  5

  5. CHECK HARNESS AND CONNECTOR (SWING GRILLE ACTUATOR ASSEMBLY - EFI-MAIN NO. 1 RELAY) 
    1. Disconnect the swing grille actuator assembly connector.
    2. Remove the EFI-MAIN NO. 1, VVT, EFI-MAIN NO. 2 and EFI-MAIN NO. 3 relays from the No. 1 engine room relay block and No. 1 junction block assembly.

      HINT: 

      Remove the VVT, EFI-MAIN NO. 2 and EFI-MAIN NO. 3 relays connected between the checked terminals as the coil inside the relay influences the measurement value.

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

      Standard Resistance

      Tester Connection Condition Specified Condition
      X1-1 (+B) - 5 (EFI-MAIN NO. 1 Relay) Always Below 1 Ω
      X1-1 (+B) or 5 (EFI-MAIN NO. 1 Relay) - Body ground and other terminals Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

    Result: 

    OK 

    See step  6

  6. CHECK ECM POWER SOURCE CIRCUIT 
    1. Check the ECM power source circuit.

      Refer to ECM Power Source Circuit [12/2019 - 11/2023]

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  7

  7. READ VALUE USING GTS (GRILLE SHUTTER CONTROL MODE) 
    1. According to the display on the GTS, change the grille shutter control mode from maintenance mode to normal mode.

      Powertrain > Engine > Utility 

      Tester Display
      Switch Grille Shutter Control Mode
    2. Read the value displayed on the GTS.

      Powertrain > Engine > Data List 

      Tester Display
      Grille Shutter Control Mode

      Standard

      GTS Display Specified Condition
      Grille Shutter Control Mode Normal

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    END 

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