Entry And Start System (For Start Function) System Description

  1. PUSH-BUTTON START DESCRIPTION

  1. FUNCTION OF COMPONENT

  1. CONSTRUCTION AND OPERATION

  1. PUSH-BUTTON START FUNCTION OPERATION

  1. SYSTEM NOT OPERATING NORMALLY (DUE TO KEY BATTERY DEPLETION, ELECTRICAL NOISE, ETC.)

  1. DIAGNOSIS

Entry And Start System (For Start Function) -- System Description



PUSH-BUTTON START DESCRIPTION

  1. The push-button start function uses a push-type engine switch, which the driver can operate by merely carrying the key. This system consists primarily of the power management control ECU, engine switch, ID code box, steering lock ECU, key, ACC relay, IG1 relay, IG2 relay and certification ECU. The power management control ECU controls the system. This function operates in cooperation with the entry and start system.


FUNCTION OF COMPONENT

Component
Function
Engine switch
- Transponder key amplifier
Informs the driver of a power source mode or system abnormality with the illumination state of the indicator light.
Power management control ECU
  1. Changes the power source mode in 4 stages (off, on (ACC), on (IG), start).
  2. Controls the indicator light of the engine switch.
  3. Activates the starter relay.
Certification ECU
  1. Performs key verification (checks whether the correct key is present).
  2. Controls the security indicator and the illumination of the lettering on the engine switch.
  3. Records ECU verification codes.
Stop light switch*1
Outputs the state of the brake pedal to the power management control ECU.
Park/neutral position switch*1
Outputs the state of the shift lever to the power management control ECU.
Clutch start switch*2
Outputs the state of the clutch pedal to the power management control ECU.
Shift lock control ECU*1
Outputs a shift lock control ECU signal to the power management control ECU.
ID code box
  1. Transmits a command to set or cancel the immobiliser to the ECM based on permission signals from the certification ECU.
  2. Records ECU verification codes.
ECM
  1. Receives an engine start request signal from the power management control ECU, turns on the starter relay, and starts the engine.
  2. Receives a signal from the ID code box and performs engine ignition and injection.
  1. *1: for Automatic Transmission
  2. *2: for Manual Transmission

CONSTRUCTION AND OPERATION
Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Theft Deterrent Keyless Entry.Entry And Start System (For Entry Function).Entry And Start System (For Start Function) System Description
Text in Illustration
*1
Indicator Light

  1. Engine Switch
    The engine switch consists of a momentary type switch, 2 colored LED (amber, green) and a transponder key amplifier.

    1. The amber LED is for illumination.
    2. The amber and green LEDs are for the indicator lights. The driver can check the present power source mode and whether the engine can start by checking the illumination state of the indicator light.
    3. When the power management control ECU detects an abnormality in the entry and start system, it makes the amber indicator light flash. If the engine stopped in this state, it may not be possible to restart it.

  2. Indicator Light Condition

    Engine Switch Indicator Light Condition
    Power Source Mode/Condition
    		Indicator Light Condition
    Brake pedal released*1
    		Brake pedal depressed, shift lever in P or N*1
    		Clutch pedal released*2
    		Clutch pedal depressed*2
    Off
    		Off
    		Turns on (Green)
    		Off
    		Turns on (Green)
    On (ACC) or on (IG)
    		Turns on (Amber)
    		Turns on (Green)
    		Turns on (Amber)
    		Turns on (Green)
    Engine running
    		Off
    		Off
    		Off
    		Off
    Steering lock not unlocked
    		Flashes (Green) for 30 sec.
    		Flashes (Green) for 30 sec.
    		Flashes (Green) for 30 sec.
    		Flashes (Green) for 30 sec.
    System malfunction
    		Flashes (Amber) for 15 sec.
    		Flashes (Amber) for 15 sec.
    		Flashes (Amber) for 15 sec.
    		Flashes (Amber) for 15 sec.
    *1: for Automatic Transmission
    *2: for Manual Transmission

  3. Power Management Control ECU
    The power management control ECU consists of the IG1 and IG2 relay actuation circuits and CPU.

    HINT:
    Before removing the battery, make sure to turn the engine switch off. The power management control ECU constantly stores the present power source mode in its memory. Therefore, if the power management control ECU is interrupted by disconnecting the battery, the power management control ECU restores the power source mode after the battery is reconnected. For this reason, if the battery is disconnected when the engine switch is not off, the power is restored to the vehicle at the same time the power is restored to the power management control ECU (by reconnecting the battery).

PUSH-BUTTON START FUNCTION OPERATION


  1. This system has different power source mode patterns depending on the brake pedal*1 or clutch pedal*2 condition and shift lever position*1.

    1. *1: for Automatic Transmission
    2. *2: for Manual Transmission

    Brake Pedal*1
    		Clutch Pedal*2
    		Shift Lever Position*1
    		Power Source Mode Pattern
    Depressed
    		Depressed
    		P or N
    		When the engine switch is pushed once.
    1. off → engine start
    Not depressed
    		Not depressed
    		P
    		Each time the engine switch is pushed.
    1. off → on (ACC) → on (IG) → off
    Except P
    		Each time the engine switch is pushed.
    1. off → on (ACC) → on (IG) → on (ACC)
    -
    		-
    		P
    		When the engine switch is on (IG) (engine running).
    1. on (IG) → off
    -
    		-
    		Except P
    		When the engine switch is on (IG) (engine running).
    1. on (IG) → on (ACC)
    When the battery of the key is low or the signal communication is affected by wave noise, the push-button start function can be operated by holding the key against the engine switch.
    1. *1: for Automatic Transmission
    2. *2: for Manual Transmission



    1. for Automatic Transmission:

      1. After approximately 20 minutes have passed with the engine switch on (ACC) and the shift lever in P, the power management control ECU automatically cuts the power supply (the power source mode changes to off).
      2. After approximately 1 hour has passed with the engine switch on (IG) and the shift lever in P, the power management control ECU automatically cuts the power supply (the power source mode changes to off).
      3. The illustration below shows the transition of power source modes.
        Transition of power source mode:

      Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Theft Deterrent Keyless Entry.Entry And Start System (For Entry Function).Entry And Start System (For Start Function) System Description

      HINT:
      While the vehicle is being driven normally, operation of the engine switch is disabled. However, if the engine must be stopped in an emergency while the vehicle is being driven, pressing and holding the engine switch for 2 seconds or more or by quickly pressing the engine switch 3 times or more stops the engine and then the power source mode changes from start to on (ACC).


    2. for Manual Transmission:

      1. After approximately 20 minutes have passed with the engine switch on (ACC), the power management control ECU automatically cuts the power supply (the power source mode changes to off).
      2. After approximately 1 hour has passed with the engine switch on (IG), the power management control ECU automatically cuts the power supply (the power source mode changes to off).
      3. The illustration below shows the transition of power source modes.
        Transition of power source mode:

      Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Theft Deterrent Keyless Entry.Entry And Start System (For Entry Function).Entry And Start System (For Start Function) System Description

      HINT:
      While the vehicle is being driven normally, operation of the engine switch is disabled. However, if the engine must be stopped in an emergency while the vehicle is being driven, pressing and holding the engine switch for 2 seconds or more or by quickly pressing the engine switch 3 times or more stops the engine and then the power source mode changes from start to on (ACC).

SYSTEM NOT OPERATING NORMALLY (DUE TO KEY BATTERY DEPLETION, ELECTRICAL NOISE, ETC.)


    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155

  1. To operate the push-button start function when the key battery is low or the signal communication is affected by wave noise, hold the key against the engine switch with the brake pedal*1 or clutch pedal*2 depressed.

    1. *1: for Automatic Transmission
    2. *2: for Manual Transmission

DIAGNOSIS
The power management control ECU can detect malfunctions in the push-button start function when the power source mode is on (IG).
When the ECU detects a malfunction, the amber indicator light of the engine switch flashes to warn the driver. At the same time, the ECU stores a 5-digit DTC (Diagnostic Trouble Code) in memory.
  1. The indicator light warning continues flashing for 15 seconds even after the power source mode is changed to off.
  2. The DTCs can be output by connecting the intelligent tester to the DLC3.
  3. The push-button start function cannot be operated if a malfunction occurs.