LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Toyota >> 2021 >> Prius XLE AWD-e >> Repair and Diagnosis >> Electrical >> Starter >> Smart Key System (Keyless Start) - Diagnostics - Introduction >> SMART KEY SYSTEM (for Start Function) >> Operation Check [11/2015 - ] >> Operation Check [11/2015 - ]
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Operation Check [11/2015 - ]

  1. OPERATION DESCRIPTION 
    NOTE:

    Make sure that the smart key system (for Start Function) has not been canceled before performing this inspection.

    Refer to CUSTOMIZE PARAMETERS [11/2015 - ] 

    1. Push-button start function:
      1. When the electrical key transmitter sub-assembly is in a vehicle interior detection area and the brake pedal is depressed, the hybrid control system is started by pressing the power switch.
      2. When the electrical key transmitter sub-assembly is in a vehicle interior detection area and the brake pedal is not depressed, the power source mode is changed by pressing the power switch. The power source mode changes in the following order every time the power switch is pressed: off → on (ACC) → on (IG) → off.
      3. After getting into the vehicle while carrying the electrical key transmitter sub-assembly when the power switch is off, if the power switch is pressed while not depressing the brake pedal, the power source mode will change to on (ACC) and "ACCESSORY" will be displayed on the main display.
        GTY588327Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a "ACCESSORY" Display
      4. After getting into the vehicle while carrying the electrical key transmitter sub-assembly when the power switch is off, if the power switch is pressed 2 times without depressing the brake pedal, the power source mode will change to on (IG) and "Ignition ON" will be displayed on the main display.
        GTY562416Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a "Ignition ON" Display
      5. After getting into the vehicle while carrying the electrical key transmitter sub-assembly when the power switch is off, if the brake pedal is depressed with park (P) selected, the key indicator display will be displayed on the multi-information display.
        GTY609492Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a Key Indicator Display
      6. The hybrid control system will start if the power switch is pressed when the key indicator display is displayed.
    2. Changing the power source mode when the electrical key transmitter sub-assembly is not operating correctly due to wave interference or transmitter battery depletion:
      1. Unlock the door using the built-in mechanical key and get into the vehicle while carrying the electrical key transmitter sub-assembly.
      2. While depressing the brake pedal and facing the logo side of the electrical key transmitter sub-assembly toward the power switch, hold the electrical key transmitter sub-assembly near the power switch.
      3. A buzzer in the combination meter assembly will sound and the power source mode will change to on (IG) and "Ignition ON" will be displayed on the main display.
        GTY562416Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a "Ignition ON" Display
      4. Pressing the power switch without depressing the brake pedal changes the power source mode from on (IG) to off.
    3. Starting the hybrid control system when the electrical key transmitter sub-assembly does not operate correctly due to wave interference or transmitter battery depletion:
      1. Unlock the door using the built-in mechanical key and get into the vehicle while carrying the electrical key transmitter sub-assembly.
      2. While depressing the brake pedal with park (P) selected and facing the logo side of the electrical key transmitter sub-assembly toward the power switch, hold the electrical key transmitter sub-assembly near the power switch.
      3. A buzzer in the combination meter assembly will sound, the power source mode will change to on (IG) and the key indicator display will be displayed on the multi-information display.
        GTY609492Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a Key Indicator Display
      4. Press the power switch with the brake pedal depressed to start the hybrid control system.
  2. CHECK PUSH-BUTTON START FUNCTION 
    1. Check the push-button start function:
      1. Get into the vehicle while carrying the electrical key transmitter sub-assembly with the power switch off. With park (P) selected, check that the key indicator display is displayed when the brake pedal is depressed. Check that the hybrid control system starts when the power switch is pressed after the key indicator display is displayed on the multi-information display.
        GTY609492Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a Key Indicator Display
      2. While carrying the electrical key transmitter sub-assembly, check that the power source mode changes in the following order when the power switch is pressed with the brake pedal released: off → on (ACC) → on (IG) → off.
      3. Check the push-button start function operation range for the front side. Place the electrical key transmitter sub-assembly at either inspection point so that it is facing the direction shown in the illustration, and then check that the hybrid control system can be started.
        NOTE:

        Even if the electrical key transmitter sub-assembly is in a vehicle interior detection area, it may not be properly detected if it is on the instrument panel, in the glove box or on the floor.

        HINT: 

        • Communication may not be possible if the electrical key transmitter sub-assembly is within 0.2 m (0.656 ft.) of the No. 1 indoor electrical key antenna assembly (front floor).

          Refer to PARTS LOCATION [11/2015 - ] 

        • Perform this inspection for both inspection points.
        GTY553055Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a Inspection Point
      4. Check the push-button start function operation range for the rear side. Place the electrical key transmitter sub-assembly at either inspection point so that it is facing the direction shown in the illustration, and then check that the hybrid control system can be started.
        NOTE:

        Even if the electrical key transmitter sub-assembly is in a vehicle interior detection area, it may not be properly detected if it is on the instrument panel, in the glove box or on the floor.

        HINT: 

        • Communication may not be possible if the electrical key transmitter sub-assembly is within 0.2 m (0.656 ft.) of the center of the No. 2 indoor electrical key antenna assembly (rear floor).

          Refer to PARTS LOCATION [11/2015 - ] 

        • Perform this inspection for both inspection points.
        GTY576889Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a Inspection Point
      5. Check the push-button start function operation range for the luggage compartment. Place the electrical key transmitter sub-assembly at either inspection point so that it is facing the direction shown in the illustration, and then check that the hybrid control system can be started.
        NOTE:

        Even if the electrical key transmitter sub-assembly is in a vehicle interior detection area, it may not be properly detected if it is on the instrument panel, in the glove box or on the floor.

        HINT: 

        • Communication may not be possible if the electrical key transmitter sub-assembly is within 0.2 m (0.656 ft.) of the center of the No. 3 indoor electrical key antenna assembly (inside luggage compartment).

          Refer to PARTS LOCATION [11/2015 - ] 

        • Perform this inspection for both inspection points.
        GTY569118Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        *a Inspection Point
  3. CHECK TRANSMITTER BATTERY SAVING MODE FUNCTION 
    1. Check the transmitter battery saving mode function:
      1. Press the unlock switch of the electrical key transmitter sub-assembly twice while pressing the lock switch and check that the electrical key transmitter sub-assembly LED blinks 4 times and enters transmitter battery saving mode.
      2. Check that the smart key system (for Start Function) does not operate while in transmitter battery saving mode.

        HINT: 

        To cancel transmitter battery saving mode, press a switch of the electrical key transmitter sub-assembly.

  4. CHECK POWER SOURCE MODE CHANGING FUNCTION 
    1. Check the power switch.
      1. Check that the power source mode changes according to the chart below.
        Shift Position Brake Pedal Power Source Mode when Power Switch Pressed
        Park (P) selected Released Off → on (ACC) → on (IG) → off
        Park (P) selected Released On (READY) → off
        Park (P) selected Depressed Off → on (READY)
        Park (P) selected Depressed On (ACC) → on (READY)
        Park (P) selected Depressed On (IG) → on (READY)
        Park (P) selected Depressed On (READY) → off
        Park (P) not selected Released / Depressed On (ACC) → on (IG)
        Park (P) not selected Released / Depressed On (READY) → off
        Park (P) not selected Released / Depressed on (IG) → off
  5. CHECK POWER SOURCE MODE INDICATION 
    1. Check the key indicator display.
      GTY548280Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a "ACCESSORY" Display *b "Ignition ON" Display
      *c Key Indicator Display - -
      MAIN DISPLAY AND MULTI-INFORMATION DISPLAY INSPECTION

      Power Source Mode Main Display / Multi-information Display
      Off
      (Excluding conditions in which the hybrid control system can be started)
      Off
      On (ACC)
      (Excluding conditions in which the hybrid control system can be started)
      "ACCESSORY" displayed
      On (IG)
      (Excluding conditions in which the hybrid control system can be started)
      "Ignition ON" displayed
      Condition in which hybrid control system can be started*1 Key Indicator displayed
      Hybrid control system started Off

      HINT: 

      *1: Indicates the conditions in which the hybrid control system can be started by pressing the power switch while either of the following conditions is met:

      • Condition 1

        All of the following conditions are met:

        • The power source mode was changed from on (IG) to on (ACC).
        • Key verification is OK*2 or immobilizer is unset (power switch is on (ACC) or on (IG)).
        • The stop light switch assembly is on.
      • Condition 2

        All of the following conditions are met:

        • The power source mode was not changed from on (IG) to on (ACC).
        • Key verification is OK*2 or immobilizer is unset (power switch is on (ACC) or on (IG)).
        • The stop light switch assembly is on.

      *2: When the electrical key transmitter sub-assembly is in the cabin, the ID code sent as a result of communication between the electrical key transmitter sub-assembly and certification ECU (smart key ECU assembly) and the ID code calculated by the certification ECU (smart key ECU assembly) are compared. If the ID codes match each other, the vehicle recognizes that the electrical key transmitter sub-assembly is in the cabin.