Lighting System Fail-Safe Chart

Vehicle Exterior. Land Cruiser. Urj200, 202 Grj200 Vdj200
Lighting (Ext). Land Cruiser. Urj200, 202 Grj200 Vdj200

  1. Automatic Headlight Beam Level Control System (w/ Static Headlight Auto Leveling)

  1. Automatic Headlight Beam Level Control System (w/ Dynamic Headlight Auto Leveling)

  1. AUTOMATIC HIGH BEAM SYSTEM (w/ Automatic High Beam System)

Lighting System -- Fail-Safe Chart



Automatic Headlight Beam Level Control System (w/ Static Headlight Auto Leveling)

  1. The headlight leveling ECU operates in fail-safe mode if an abnormal condition such as those listed below has been detected.

    Item
    		Abnormality Detection Condition
    		Return Condition
    		Warning Indicator
    Height control sensor power source voltage
    		Abnormal height control sensor power source voltage (4.6 V or less, or 6.25 V or more) is detected.
    		Voltage of 4.61 to 6.24 V is detected
    		Illuminated
    Height control sensor signal voltage
    		Abnormal height control sensor signal voltage (0.25 V or less, or 4.75 V or more) is detected.
    		Voltage of 0.26 to 4.74 V is detected
    High power source voltage
    		Abnormal high power source voltage (18.5 V or more) is detected.
    		Voltage of 17.5 V or less is detected
    		Not illuminated
    Low power source voltage
    		Abnormal low power source voltage (9.0 V or less) is detected.
    		Voltage of 9.3 V or more is detected
    		Not illuminated
    Abnormal height control sensor signal while initialization
    		Initialization is performed outside the valid range of the voltage for initialization.
    		Initialization is successfully completed within the valid range of the voltage for initialization.
    		Illuminated


Automatic Headlight Beam Level Control System (w/ Dynamic Headlight Auto Leveling)
If the headlight swivel ECU detects a malfunction in the automatic headlight beam level control system, it will take the actions indicated in the table below.

Malfunctioning Part
Detection Condition
Fail-safe Control
Warning Indicator
Speed Sensor
Speed sensor signal malfunction
Continues control.
Illuminated
Rear Height Control Sensor LH (w/o Active Height Control Suspension)
Rear height control sensor LH signal malfunction
  1. Stops operation after returning the headlight leveling motor to the initial position (system fails when the headlight leveling motor is higher than the initial position).
  2. Stops operation with the headlight leveling motor at the current position (system fails when the headlight leveling motor is lower than the initial position).
Illuminated
Source voltage malfunction
Height Control Sensor Signal (w/ Active Height Control Suspension)
Height control sensor signal malfunction
  1. Stops operation after returning the headlight leveling motor to the initial position (system fails when the headlight leveling motor is higher than the initial position).
  2. Stops operation with the headlight leveling motor at the current position (system fails when the headlight leveling motor is lower than the initial position).
Illuminated
Headlight Leveling Motor
Headlight leveling motor communication error
Abnormal side headlight leveling motor:
  1. Stops operation after returning the headlight leveling motor to the initial position (system fails when the headlight leveling motor is higher than the initial position).
  2. Stops operation with the headlight leveling motor at the current position (system fails when the headlight leveling motor is lower than the initial position).
Normal side headlight leveling motor:
  1. Stops operation after returning the headlight leveling motor to the initial position (system fails when the headlight leveling motor is higher than the initial position).
  2. Stops operation with the headlight leveling motor at the current position (system fails when the headlight leveling motor is lower than the initial position).
Illuminated
Headlight leveling motor malfunction
  1. Open in circuit
  2. Short in circuit
  3. Overheated
Abnormal side headlight leveling motor:
  1. Stops at the current position.
Normal side headlight leveling motor:
  1. Stops operation after returning the headlight leveling motor to the initial position (system fails when the headlight leveling motor is higher than the initial position).
  2. Stops operation with the headlight leveling motor at the current position (system fails when the headlight leveling motor is lower than the initial position).
Headlight Leveling Motor
Voltage malfunction
Abnormal side headlight leveling motor:
  1. Stops at the current position.
Normal side headlight leveling motor:
  1. Stops operation after returning the headlight leveling motor to the initial position (system fails when the headlight leveling motor is higher than the initial position).
  2. Stops operation with the headlight leveling motor at the current position (system fails when the headlight leveling motor is lower than the initial position).
Not illuminated
CAN Communication System
Vehicle specifications unconfirmed
(Main body ECU)
Continues control.
Illuminated
Communication signal malfunction
(Main body ECU)
Communication signal malfunction
(Skid control ECU)
Judges that the vehicle speed is 0 km/h (0 mph) and continues control.
Headlight Swivel ECU
Vehicle specifications unconfirmed
Continues control.
Illuminated
Rear height control sensor LH initialization unconfirmed
Both headlight leveling motors:
  1. Stop at the same position as when the vehicle is empty.
Blinks 6 times at 2 Hz after the ignition switch is turned from off to ON

AUTOMATIC HIGH BEAM SYSTEM (w/ Automatic High Beam System)

  1. The main body ECU operates in fail-safe mode if an abnormal condition, such as those listed below, has been detected.

    Item
    		Abnormality Detection Condition
    		Return Condition
    		Warning Indicator
    Speed Sensor Signal Malfunction
    		Abnormal speed sensor signal is detected.
    		Normal speed sensor signal is detected.
    		Flashes
    CAN Communication Signal Malfunction
    		Abnormal CAN communication signal is detected.
    		Normal CAN communication signal is detected.
    		Flashes
    Automatic High Beam Sensor
    		Abnormal communication signal is detected.
    		Normal communication signal is detected.
    		Flashes