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BEBODY ELECTRICAL – LIGHTING02KBE09TEHeadlight Beam Level Control Switch05026BE08PFromHeadlight RelayHeadlight Beam Level Control SwitchHeadlight Level Actuator (LH)Headlight Level Actuator (RH)BE-25JHEADLIGHT BEAM LEVEL CONTROL SYSTEM1. Manual Headlight Beam Level ControlWhen the vehicle posture changes due to the number (weight) of passengers and volume of luggage, thissystem enables the driver to manually adjust the headlight beam level (in 5-steps) to the appropriate level byusing the headlight beam level control switch. The beam level of the headlights can be adjusted with theactuators that are integrated into the headlight units." Wiring Diagram A BODY ELECTRICAL – LIGHTING02KBE10TEHeadlight Beam Level026BE10PHeight Control Sensor (Rear RH)Power DistributorD Headlight RelaysHeadlight Relay StatusMain Body ECUDLC3Initialization SignalHeadlightBeam Level Control ECUHeadlight Unit (LH)Headlight Level ActuatorHeadlight Unit (RH)Headlight Level ActuatorCombination MeterAutomatic HeadlightLeveling System Warning LightVehicle Speed SignalService TipIf the headlight beam level control ECU is replaced, or the rear height control sensor is removed,the headlight beam level control ECU must be initialized.For details, see the Camry Repair Manual.BE-262. Automatic Headlight Beam Level Control (Models without intelligent AFS)GeneralD The automatic headlight beam level control, which is controlled by the headlight beam level controlECU, is used on models without intelligent AFS.D When the vehicle is stationary and the headlights are on, the automatic headlight beam level control systemoperates the headlight level actuator in accordance with the amount of variation in the vehicle posture.D The automatic headlight beam level control system mainly consists of the headlight beam level controlECU, rear height control sensor, and two headlight level actuators.D The headlight beam level control ECU calculates changes in the vehicle posture based on signals fromthe height control sensor (rear RH).D The ECU then controls the headlight level actuator based on this information, in order to change theheadlight reflector angle." System Diagram A BEBODY ELECTRICAL – LIGHTING02KBE11TEAutomatic Headlight Leveling System Warning LightCombination MeterMain Body ECUHeadlight Beam Level Control ECUDLC3Height Control Sensor (Rear RH)Power DistributorD Headlight RelaysHeadlight Level ActuatorHeadlight UnitBE-27Layout of Main Components BODY ELECTRICAL – LIGHTINGBE-28Function of Main ComponentsComponents Function and ConstructionHeadlight Beam LevelD Based on the signals that are transmitted by the height control sensor,this ECU detects the amount of variation in the vehicle posture.D Based on the detected value, this ECU outputs a control signal to theheadlight level actuatorgControl ECUheadlight level actuator.D When the ECU detects a malfunction, it outputs a warning displayrequest signal to the combination meter (meter ECU).D This ECU provides a fail-safe function.HeadlightD Based on the signals received from the headlight beam level controlECU the headlight level actuators move the reflectors in theHeadlightUnitHeadlightLevelAt tECU, the headlight level actuators move the reflectors in theheadlights to vary their beams.D These actuators use DC motors and precisely regulate the angles ofActuatorD These actuators use DC motors and precisely regulate the angles ofthe reflectors.Height Control SensorThe height control sensor detects the amount of variation in the vehicleheight and outputs this information in the form of a signal to theg(Rear RH)height, and outputs this information in the form of a signal to theheadlight beam level control ECU.Combination MeterD Outputs the vehicle speed signal to the headlight beam level controlECU.D If the system malfunctions, the combination meter (meter ECU)illuminates the automatic headlight leveling system warning light toalert the driver.Fail-SafeWhen any of the malfunctions below are detected, the headlight beam level control ECU stops transmittingoutput signals to the headlight level actuator, suspends headlight level control, and transmits a warningdisplay request signal to the combination meter. On receiving this signal, the combination meter illuminatesthe automatic headlight leveling system warning light to alert the driver.ItemAbnormality Detection ConditionAutomatic Headlight LevelingSystem Warning LightHeight ControlSensorD Abnormal height control sensor powersource voltage (4.6 V or less)D Abnormal height control sensor signalvoltage (0.25 V or less, or 4.75 V or more)ONPower Source VoltageAbnormal headlight beam level control ECUpower source voltage (18.5 V or more, or 9 Vor less)OFFVehicle Speed Excessive vehicle speed detected OFFECU ResetDuring DrivingHeadlight beam level control ECU reset whilevehicle running (For example, headlightbeam level control ECU power source circuitopen momentarily)OFF BEBODY ELECTRICAL – LIGHTING02KBE10TE02KBE12YHeight Control Sensor (Rear RH)Rear HeightDLC3InitializationSignalDiagnosisSignalAFSECUCAN (CAN No.2 Bus)CANGateway ECUHeadlight Unit (LH)Headlight Level ActuatorHeadlight Unit (RH)Headlight Level ActuatorSkid Control ECUD Speed Sensor (Front LH . RH)CAN (CAN No.1 Bus)Main Body ECUD Headlight StatusMeter ECUD AFS OFF Indicator LightEngine ECUD Engine Running StatusService TipIf the AFS ECU is replaced, or the rear height control sensor is removed, the AFS ECU must beinitialized.For details, see the Camry Repair Manual.BE-293. Automatic Headlight Beam Level Control (Models with intelligent AFS)GeneralD The automatic headlight beam level control system, which is controlled by the AFS ECU, is used onmodels with intelligent AFS.D When the headlights are on, the automatic headlight beam level control system operates the headlightlevel actuator in accordance with movement of the vehicle.D The automatic headlight beam level control system mainly consists of the AFS ECU, rear height controlsensor, and two headlight level actuators.D The AFS ECU calculates changes in the vehicle posture based on signals from the height control sensor(rear RH) and each ECU.D The ECU then controls the headlight level actuator based on this information, in order to change theheadlight reflector angle." System Diagram A BODY ELECTRICAL – LIGHTING02KBE13TEAFS OFF Indicator LightCombination MeterMain Body ECUCANGateway ECUHeight Control Sensor (Rear RH)AFS ECUDLC3Power DistributorD Headlight RelaysHeadlight Level ActuatorHeadlight UnitBE-304. Layout of Main Components BEBODY ELECTRICAL – LIGHTINGBE-315. Function of Main ComponentsComponent OutlineAFS ECUD Calculates changes in the vehicle posture based on the signalsfrom the height control sensor and each ECU.D Based on the detected value, this ECU outputs a control signal tothe headlight level actuator.D This ECU provides initial set control, fail-safe function anddiagnosis function.Headlight UnitHeadlightD Based on the signals received from the AFS ECU, the actuatorsmove the reflectors in the headlights to vary the Lo beam.Headlight UnitgLevel ActuatorgyD These actuators use a step motor to precisely regulate the angle ofthe reflectors.Height Control Sensor (Rear RH)The height control sensor detects the amount of variation in thevehicle height, and outputs this information in the form of a signalto the AFS ECU.Skid Control ECUTransmits the speed sensor signal (Front LH and RH) to the AFSECU.Engine ECU Transmits the engine running status signal to the AFS ECU.Main Body ECU Transmits the headlight status signal.CombinationMeter(Meter ECU)AFS OFFIndicator LightWhen the system malfunctions, the meter ECU alerts the driver byflashing the AFS OFF indicator light in accordance with the signalfrom the AFS ECU.6. Initial Set ControlWhen the engine is started, the AFS ECU drives the headlight level actuator, moves the headlight reflectorto the lower limit position and returns it to the proper position. The AFS ECU thus assesses the position ofthe headlight for reference control. BODY ELECTRICAL – LIGHTINGBE-327. Fail-SafeIf the AFS ECU detects a malfunction in the automatic headlight beam level control system or intelligentAFS, it will take the actions indicated in the table below.Trouble AreaConditionAFS OFFIndicatorLightHeadlight SwivelActuator MalfunctionContinues to control until a position of 0.650 less than the currentposition is reached.FlashSteering Angle SensorSignal MalfunctionContinues to control. FlashSpeed Sensor SignalMalfunctionD Continues to control using the normal speed sensor signal ifone signal fails.D Judges that the vehicle speed is 0 mph (0 km/h) and continuesto control if both speed sensor signals fail.FlashHeight Control SensorSignal MalfunctionD Stops the operation after returning to the initial position (Iffailure at higher than initial position).D Stops the operation in the current condition (If failure at lowerthan initial position).FlashHeadlight LevelActuator MalfunctionNormal Side Headlight Level Actuator:D Stops the operation after returning to the initial position (Iffailure at higher than initial position).D Stops in the current condition (If failure at lower than initialposition).FlashAbnormal Side Headlight Level Actuator:D Stops in its current position.Communication SignalMalfunctionSkid Control ECU:D Judges that the vehicle speed is 0 mph (0 km/h) and continuesto control.FlashMalfunctionSteering Angle Sensor:D Normally controls the system.Flash8. DiagnosisIf the AFS ECU detects a malfunction in the automatic headlight beam level control system, the AFS ECUflashes the AFS OFF indicator light. At the same time, the DTC (Diagnostic Trouble Codes) are stored inmemory. The DTC can be read by use of the intelligent tester II. For details, see the Camry Repair Manual. . RelaysHeadlight Level ActuatorHeadlight UnitBE -3 0 4. Layout of Main Components BEBODY ELECTRICAL – LIGHTINGBE -3 1 5. Function of Main ComponentsComponent OutlineAFS. ELECTRICAL – LIGHTING02KBE11TEAutomatic Headlight Leveling System Warning LightCombination MeterMain Body ECUHeadlight Beam Level Control ECUDLC3Height Control Sensor