Lighting System (Diagnostic - Introduction): Other Lexus RX III рестайлинг

PRECAUTION [03/2012 - 07/2012]

Note. When disconnecting the cable from the negative (-) battery terminal, initialize the following systems after the cable is reconnected. System Name See Procedure Parking Assist Monitor System Refer to INITIALIZATION [03/2012 - 07/2012] Back Door Closer System Power Back Door System

1. PRECAUTION FOR HID HEADLIGHT SYSTEM When any defects such as deformation, cracks, dents, chipping, etc. are identified on the High Intensity Discharge (HID) headlight (especially, on the light control ECU), replace it with a new one. Even if the operation of the lights seems to be normal, the fail-safe function may be defective. Since an HID headlight bulb has pressurized gas inside and can easily be broken if scratched or dropped, special care should be taken. When handling the bulb, hold the plastic or metal part and do not touch the glass part with bare hands. When the HID headlights illuminate, a high voltage (approximately 30000 V) is applied momentarily to the bulb sockets. Never connect a tester to the high voltage socket of an HID headlight for measurement, as this may result in a serious accident because of high voltage. When servicing an HID headlight, do not allow the HID headlight to come into contact with water. Turn off the light control switch and disconnect the cable from the negative (-) battery terminal and the connector of the light control ECU in advance to avoid electric shocks. When performing an operation related to an HID headlight, only operate it after assembly is complete. Never turn on the HID headlights without a bulb installed. Do not turn on the HID headlights using a power source other than the vehicle battery. The light color emitted by the HID headlight bulb varies across the ages.
2. PRECAUTION FOR HEADLIGHT BULB REPLACEMENT If even a thin film of oil is left on the surface of an HID headlight bulb or a halogen bulb, its service life will be shortened because the light will burn at a higher temperature. When replacing a bulb, be sure to hold the flanged part of the light so that your hand does not contact the glass part of the bulb. Due to the high internal pressure of HID headlight bulbs, they may explode and shatter if dropped, hit or damaged. Always prepare a new bulb for immediate replacement. While replacing the bulb, the lens may attract dust and moisture if removed from the vehicle for a long time. Always replace a bulb with another bulb of the same wattage. If only replacing the bulb on one side, differences in brightness and lighting color between the right and left sides may occur. Securely install the socket after bulb replacement. The lens may become cloudy or the light cavity may be filled with water through gaps around the socket if it is not installed securely. Do not break the HID headlight bulb when disposing of it as shards of glass may fly off and cause injuries. It is not possible to determine if an HID headlight bulb is defective by checking it visually. Check the bulb by replacing it with a known good one.

PRECAUTION [07/2012 - ]

Note. When disconnecting the cable from the negative (-) battery terminal, initialize the following systems after the cable is reconnected. System Name See Procedure Parking Assist Monitor System Refer to INITIALIZATION [07/2012 - ] Back Door Closer System Power Back Door System

1. PRECAUTION FOR HID HEADLIGHT SYSTEM When any defects such as deformation, cracks, dents, chipping, etc. are identified on the High Intensity Discharge (HID) headlight (especially, on the light control ECU), replace it with a new one. Even if the operation of the lights seems to be normal, the fail-safe function may be defective. Since an HID headlight bulb has pressurized gas inside and can easily be broken if scratched or dropped, special care should be taken. When handling the bulb, hold the plastic or metal part and do not touch the glass part with bare hands. When the HID headlights illuminate, a high voltage (approximately 30000 V) is applied momentarily to the bulb sockets. Never connect a tester to the high voltage socket of an HID headlight for measurement, as this may result in a serious accident because of high voltage. When servicing an HID headlight, do not allow the HID headlight to come into contact with water. Turn off the light control switch and disconnect the cable from the negative (-) battery terminal and the connector of the light control ECU in advance to avoid electric shocks. When performing an operation related to an HID headlight, only operate it after assembly is complete. Never turn on the HID headlights without a bulb installed. Do not turn on the HID headlights using a power source other than the vehicle battery. The light color emitted by the HID headlight bulb varies across the ages.
2. PRECAUTION FOR HEADLIGHT BULB REPLACEMENT If even a thin film of oil is left on the surface of an HID headlight bulb or a halogen bulb, its service life will be shortened because the light will burn at a higher temperature. When replacing a bulb, be sure to hold the flanged part of the light so that your hand does not contact the glass part of the bulb. Due to the high internal pressure of HID headlight bulbs, they may explode and shatter if dropped, hit or damaged. Always prepare a new bulb for immediate replacement. While replacing the bulb, the lens may attract dust and moisture if removed from the vehicle for a long time. Always replace a bulb with another bulb of the same wattage. If only replacing the bulb on one side, differences in brightness and lighting color between the right and left sides may occur. Securely install the socket after bulb replacement. The lens may become cloudy or the light cavity may be filled with water through gaps around the socket if it is not installed securely. Do not break the HID headlight bulb when disposing of it as shards of glass may fly off and cause injuries. It is not possible to determine if an HID headlight bulb is defective by checking it visually. Check the bulb by replacing it with a known good one.

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1. AUTOMATIC LIGHT CONTROL SYSTEM
2. LIGHT AUTO TURN-OFF SYSTEM COMMUNICATION TABLE Transmitter Receiver Line Data Name Certification ECU (Smart Key ECU Assembly) Main Body ECU (Multiplex Network Body ECU) CAN Wireless Door Lock Signal Power Back Door ECU (Power Back Door Unit Assembly) Main Body ECU (Multiplex Network Body ECU) CAN Back Door Courtesy Switch Signal
3. DAYTIME RUNNING LIGHT SYSTEM COMMUNICATION TABLE Transmitter Receiver Line Data Name ECM Main Body ECU (Multiplex Network Body ECU) CAN Engine RPM Data
4. HID HEADLIGHT SYSTEM
5. AUTOMATIC HEADLIGHT BEAM LEVEL CONTROL SYSTEM COMMUNICATION TABLE Transmitter Receiver Line Data Name ECM AFS ECU (Headlight Swivel ECU Assembly) CAN Engine Revolving Flag Main Body ECU (Multiplex Network Body ECU) AFS ECU (Headlight Swivel ECU Assembly) CAN Lighting System State Signal DRL Request High Beam Headlight Request Low Beam Headlight Request AFS ECU (Headlight Swivel ECU Assembly) Main Body ECU (Multiplex Network Body ECU) CAN Leveling Flag AFS ECU (Headlight Swivel ECU Assembly) Combination Meter Assembly CAN AFS OFF Indicator Request Signal Headlight Leveling Warning Message (w/o AFS) Skid Control ECU AFS ECU (Headlight Swivel ECU Assembly) CAN Front Right Wheel Speed Sensor Error Flag Front Right Wheel Speed Front Left Wheel Speed Sensor Error Flag Front Left Wheel Speed
6. DOOR MIRROR FOOT LIGHT SYSTEM COMMUNICATION TABLE Transmitter Receiver Line Data Name Power Back Door ECU (Power Back Door Unit Assembly) Main Body ECU (Multiplex Network Body ECU) CAN Back Door Courtesy Signal Main Body ECU (Multiplex Network Body ECU) Outer Rear View Mirror ECU Assembly LH CAN Door Mirror Foot Light On Demand Signal ECM Main Body ECU (Multiplex Network Body ECU) CAN Shift Position P Signal Certification ECU (Smart Key ECU Assembly) Main Body ECU (Multiplex Network Body ECU) CAN Wireless Door Lock Signal Main Body ECU (Multiplex Network Body ECU) Outer Rear View Mirror ECU Assembly RH CAN Door Mirror Foot Light On Demand Signal

CUSTOMIZE PARAMETERS [03/2012 - ]

1. CUSTOMIZE LIGHTING SYSTEM (EXT) HINT: The following items can be customized. NOTE: When the customer requests a change in a function, first make sure that the function can be customized. Be sure to make a note of the current settings before customizing. When troubleshooting a function, first make sure that the function is set to the default setting. Customizing with the Techstream Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Enter the following menus: Customize Setting / Light Control or Illuminated Entry. Select the setting by referring to the table below. LIGHT CONTROL Display Default Content Setting Relevant ECU Disp Ex ON Sen NORMAL Changes the ambient brightness level required to dim the lights such as the indicator lights of the combination meter, A/C indicator light and clock.*A LIGHT2, LIGHT1, NORMAL, DARK1 or DARK2 Main Body ECU (Multiplex Network Body ECU) Disp Ex OFF Sen NORMAL Changes the ambient brightness level required to cancel the dimming of the lights such as the indicator lights of the combination meter, A/C indicator light and clock.*B LIGHT2, LIGHT1, NORMAL, DARK1 or DARK2 Light Auto OFF Delay 30 s Keeps the headlights on for a certain period of time after turning the engine switch off and closing all the doors with the low beam headlights on. OFF, 30 s, 60 s or 90 s Sensitivity Normal Adjusts the sensitivity of the automatic light control system.*C Light2, Light1, Normal, Dark1 or Dark2 DRL Function ON ON/OFF of the DRL function ON or OFF Light up Clearance Lights at Door Unlock Function ON This function turns on the parking lights and taillights for 15 seconds when the doors are unlocked by the smart key or the wireless key. ON or OFF HINT: The sensitivity adjustment may be difficult to confirm. Check by driving the customer's vehicle. *A Brightness level required to dim the lights Setting DARK2 DARK1 NORMAL LIGHT1 LIGHT2 *B Brightness level required to cancel the dimming of the lights Setting DARK2 DARK1 NORMAL LIGHT1 LIGHT2 *C Sensitivity of the automatic light control system Setting Dark2 Dark1 Normal Light1 Light2 ILLUMINATED ENTRY Display Default Content Setting Relevant ECU Mirr-Foot-Lgt Approached ON Lights up the door mirror foot lights when a key enters any actuation area around the doors. ON or OFF Main Body ECU (Multiplex Network Body ECU) Mirr-Foot-Lgt Unlocked ON Lights up door mirror foot lights when doors are unlocked using a mechanical key or door control transmitter. ON or OFF Mirror Foot Lighting Time 15 s Changes the lighting time of the door mirror foot lights. 7.5 s, 15 s, 30 s or 0 s Exterior Light Control ON Changes the door mirror foot light control. ON or OFF Customizing with the multi-display Turn the engine switch on (IG). Enter the following menus: MENU / Setup / Vehicle / Vehicle Customization / Light Settings. Select the setting by referring to the table below. LIGHT SETTINGS Display Default Content Setting Relevant ECU Headlamps-On Sensitivity 0 Adjusts the sensitivity of the automatic light control system.*A -2, -1, 0, +1 or +2 Main Body ECU (Multiplex Network Body ECU) Headlamps Auto-Off Timer 30 sec. Keeps the headlights on for a certain period of time after turning the engine switch off and closing all doors with the low beam headlights on. Off, 30 sec., 60 sec. or 90 sec. Daytime Running Lights On ON/OFF of the DRL function On or Off Exterior Lights Off Timer 15 sec. Changes the lighting time of the door mirror foot lights. Off, 7.5 sec., 15 sec. or 30 sec. HINT: The sensitivity adjustment may be difficult to confirm. Check by driving the customer's vehicle. *A Sensitivity of the automatic light control system Setting -2 -1 0 +1 +2 Customizing using the Combination meter assembly HINT: Press the UP/DOWN switch on the steering pad switch assembly when changing the displayed item and item settings. Press the ENTER switch on the steering pad switch assembly when selecting an item. Turn the engine switch on (IG). Press and hold the MENU switch on the steering pad switch assembly. Select the setting by referring to the table below: Display Default Content Setting Relevant ECU LIGHT SENSOR SENSITIVITY 0 Adjusts the sensitivity of the automatic light control system.*A -2, -1, 0, +1 or +2 Main Body ECU (Multiplex Network Body ECU) HEADLIGHT OFF TIME ADJUSTMENT 30 s Keeps the headlights on for a certain period of time after turning the engine switch off and closing all doors with the low beam headlights on. OFF, 30 s, 60 s or 90 s DAYTIME RUNNING LIGHTS ON ON/OFF of the DRL function ON or OFF EXTERIOR LIGHTS OFF TIME ADJUSTMENT 15 s Changes the lighting time of the door mirror foot lights. OFF, 7.5 s, 15 s or 30 s HINT: The sensitivity adjustment may be difficult to confirm. Check by driving the customer's vehicle. *A Sensitivity of the automatic light control system Setting -2 -1 0 +1 +2 Press the ENTER switch on the steering pad switch assembly. The setting completion screen will be displayed. Return to the item selection screen.

INITIALIZATION [03/2012 - 07/2012]

Note. Initialize the AFS ECU (headlight swivel ECU assembly) when the AFS ECU (headlight swivel ECU assembly) is replaced. Initialize the AFS ECU (headlight swivel ECU assembly) (set the zero point of the height control sensor in the AFS ECU (headlight swivel ECU assembly)) after the vehicle height changes due to replacement of suspension components or after performing such operations as removal and reinstallation or replacement of the rear height control sensor sub-assembly RH. Adjust the headlight aim after initializing the AFS ECU (headlight swivel ECU assembly). Refer to ADJUSTMENT [03/2012 - ] . When a malfunction is detected in the automatic headlight beam level control system, height control sensor signal initialization is impossible. Perform troubleshooting before initialization.

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1. CHECK VEHICLE CONDITION Check the vehicle condition. Result Result Proceed to The AFS ECU (headlight swivel ECU assembly) has been replaced with a new one. A Removal and reinstallation of the AFS ECU (headlight swivel ECU assembly), replacement of the rear height control sensor sub-assembly RH, removal and reinstallation of the rear height control sensor sub-assembly RH, replacement of the suspension, etc. have been performed. B B --> Go to step 3 A: Go to next step
2. SYNCHRONIZE VEHICLE INFORMATION When using the Techstream: Turn the engine switch off. Connect the Techstream to the DLC3. Turn the engine switch on (IG), and check that the AFS OFF indicator light continuously blinks at 0.5 Hz. Enter the following menus: Main Body / AFS / Utility / ECU Information Sync / Next. Check what is displayed on the screen of the Techstream and press "Next". Check that the AFS OFF indicator light continuously blinks 6 times at 2 Hz. Press "Exit" and turn the engine switch off. When not using the Techstream: Turn the engine switch on (IG), and check that the AFS OFF indicator light continuously blinks at 0.5 Hz. Turn the low beam headlights on and off 8 times using the light control switch within 20 seconds after turning the engine switch on (IG). HINT: If the light control switch operation cannot be finished within 20 seconds, turn the engine switch off. Then, turn the engine switch on (IG) and restart again. NOTE: Turn the low beam headlights on and off at less than 2-second intervals. Check that the AFS OFF indicator light continuously blinks 6 times at 2 Hz. Turn the engine switch off. NEXT: Go to next step
3. PREPARE VEHICLE FOR INITIALIZATION Unload the trunk and vehicle, ensuring that the spare tire, tools and jack are in their original positions. Check that there are no occupants in the vehicle. Turn off the headlights. Stop the vehicle on a level surface and keep the vehicle height unchanged. NEXT: Go to next step
4. CHECK AFS OFF INDICATOR LIGHT Turn the engine switch on (IG), and check the indicator light. OK Condition Specified Condition The AFS ECU (headlight swivel ECU assembly) has been replaced with a new one. Indicator light continuously blinks 6 times at 2 Hz. Removal and reinstallation of the AFS ECU (headlight swivel ECU assembly), replacement of the rear height control sensor sub-assembly RH, removal and reinstallation of the rear height control sensor sub-assembly RH, replacement of the suspension, etc. have been performed. Indicator light comes on for approximately 3 seconds, and then goes off (bulb check function). HINT: If the indicator light does not come on when turning the engine switch on (IG), inspect and repair it according to Problem Symptoms Table. Refer to «PROBLEM SYMPTOMS TABLE [03/2012 - 07/2012]»(ref-602572-S41428325752014030500000) . NG --> GO TO PROBLEM SYMPTOMS TABLE OK: Go to next step
5. INITIALIZATION Connect terminals 4 (CG) and 8 (LVL) of the DLC3 using SST. SST: 09843-18040 Turn the low beam headlights on and off using the light control switch within 20 seconds after connecting the terminals. HINT: The number of times the low beam headlights need to be turned on and off is determined by the present fuel level as shown below. Fuel Level Number of Times to Turn Low Beam Headlights on and off Fuel level is within A range. 1 Fuel level is within B range. 2 Fuel level is within C range. 3 Fuel level is within D range. 4 Fuel level is within E range. 5 NOTE: Turn the low beam headlights on and off at less than 3-second intervals. Be sure to operate the light control switch from outside the vehicle. Check the AFS OFF indicator light. OK Condition Specified Condition The AFS ECU (headlight swivel ECU assembly) has been replaced with a new one. Blinks 6 times at 2 Hz --> Continuously blinks N*1 times at 2 Hz. Removal and reinstallation of the AFS ECU (headlight swivel ECU assembly), replacement of the rear height control sensor sub-assembly RH, removal and reinstallation of the rear height control sensor sub-assembly RH, replacement of the suspension, etc. have been performed. Off --> Continuously blinks N*1 times at 2 Hz. HINT: *1: The number of times that the indicator blinks is determined by the number of times the low beam headlights are turned on and off. If initialization cannot be finished normally, disconnect SST from the DLC3 and turn the engine switch off. Then, restart from procedure 1. NG --> GO TO PROBLEM SYMPTOMS TABLE OK --> TURN ENGINE SWITCH OFF (END)

INITIALIZATION [07/2012 - ]

Note. Initialize the AFS ECU (headlight swivel ECU assembly) when the AFS ECU (headlight swivel ECU assembly) is replaced. Initialize the AFS ECU (headlight swivel ECU assembly) (set the zero point of the height control sensor in the AFS ECU (headlight swivel ECU assembly)) after the vehicle height changes due to replacement of suspension components or after performing such operations as removal and reinstallation or replacement of the rear height control sensor sub-assembly RH. Adjust the headlight aim after initializing the AFS ECU (headlight swivel ECU assembly). Refer to ADJUSTMENT [03/2012 - ] . When a malfunction is detected in the automatic headlight beam level control system, height control sensor signal initialization is impossible. Perform troubleshooting before initialization.

1. CHECK VEHICLE CONDITION Check the vehicle condition. Result Result Proceed to The AFS ECU (headlight swivel ECU assembly) has been replaced with a new one. A Removal and reinstallation of the AFS ECU (headlight swivel ECU assembly), replacement of the rear height control sensor sub-assembly RH, removal and reinstallation of the rear height control sensor sub-assembly RH, replacement of the suspension, etc. have been performed. B B --> Go to step 3 A: Go to next step
2. SYNCHRONIZE VEHICLE INFORMATION When using the Techstream: Turn the engine switch off. Connect the Techstream to the DLC3. Turn the engine switch on (IG), and check that the AFS OFF indicator light continuously blinks at 0.5 Hz. Enter the following menus: Main Body / AFS / Utility / ECU Information Sync / Next. Check what is displayed on the screen of the Techstream and press "Next". Check that the AFS OFF indicator light continuously blinks 6 times at 2 Hz. Press "Exit" and turn the engine switch off. When not using the Techstream: Turn the engine switch on (IG), and check that the AFS OFF indicator light continuously blinks at 0.5 Hz. Turn the low beam headlights on and off 8 times using the light control switch within 20 seconds after turning the engine switch on (IG). HINT: If the light control switch operation cannot be finished within 20 seconds, turn the engine switch off. Then, turn the engine switch on (IG) and restart again. NOTE: Turn the low beam headlights on and off at less than 2-second intervals. Check that the AFS OFF indicator light continuously blinks 6 times at 2 Hz. Turn the engine switch off. NEXT: Go to next step
3. PREPARE VEHICLE FOR INITIALIZATION Unload the trunk and vehicle, ensuring that the spare tire, tools and jack are in their original positions. Check that there are no occupants in the vehicle. Turn off the headlights. Stop the vehicle on a level surface and keep the vehicle height unchanged. NEXT: Go to next step
4. CHECK AFS OFF INDICATOR LIGHT Turn the engine switch on (IG), and check the indicator light. OK Condition Specified Condition The AFS ECU (headlight swivel ECU assembly) has been replaced with a new one. Indicator light continuously blinks 6 times at 2 Hz. Removal and reinstallation of the AFS ECU (headlight swivel ECU assembly), replacement of the rear height control sensor sub-assembly RH, removal and reinstallation of the rear height control sensor sub-assembly RH, replacement of the suspension, etc. have been performed. Indicator light comes on for approximately 3 seconds, and then goes off (bulb check function). HINT: If the indicator light does not come on when turning the engine switch on (IG), inspect and repair it according to Problem Symptoms Table. Refer to «PROBLEM SYMPTOMS TABLE [07/2012 - ]»(ref-602572-S14924206962014030500000) . NG --> GO TO PROBLEM SYMPTOMS TABLE OK: Go to next step
5. INITIALIZATION Connect terminals 4 (CG) and 8 (LVL) of the DLC3 using SST. SST: 09843-18040 Turn the low beam headlights on and off using the light control switch within 20 seconds after connecting the terminals. HINT: The number of times the low beam headlights need to be turned on and off is determined by the present fuel level as shown below. Fuel Level Number of Times to Turn Low Beam Headlights on and off Fuel level is within A range. 1 Fuel level is within B range. 2 Fuel level is within C range. 3 Fuel level is within D range. 4 Fuel level is within E range. 5 NOTE: Turn the low beam headlights on and off at less than 3-second intervals. Be sure to operate the light control switch from outside the vehicle. Check the AFS OFF indicator light. OK Condition Specified Condition The AFS ECU (headlight swivel ECU assembly) has been replaced with a new one. Blinks 6 times at 2 Hz --> Continuously blinks N*1 times at 2 Hz. Removal and reinstallation of the AFS ECU (headlight swivel ECU assembly), replacement of the rear height control sensor sub-assembly RH, removal and reinstallation of the rear height control sensor sub-assembly RH, replacement of the suspension, etc. have been performed. Off --> Continuously blinks N*1 times at 2 Hz. HINT: *1: The number of times that the indicator blinks is determined by the number of times the low beam headlights are turned on and off. If initialization cannot be finished normally, disconnect SST from the DLC3 and turn the engine switch off. Then, restart from procedure 1. NG --> GO TO PROBLEM SYMPTOMS TABLE OK --> TURN ENGINE SWITCH OFF (END)

FREEZE FRAME DATA [03/2012 - ]

1. FREEZE FRAME DATA Whenever a DTC is detected, the AFS ECU (headlight swivel ECU assembly) stores the current vehicle (sensor) state as Freeze Frame Data.
2. CHECK FREEZE FRAME DATA Connect the Techstream to the DLC3. Turn the engine switch on (IG). Turn the Techstream on. Enter the following menus: Body Electrical / AFS / Trouble Codes. According to the display on the Techstream, select the trouble code data display with Freeze Frame Data. AFS Tester Display Measurement Item/Range Normal Condition Diagnostic Note Headlight Low Beam State Low beam headlight state/ON or OFF ON: Low beam headlights on OFF: Low beam headlights off - Headlight High Beam State High beam headlight state/ON or OFF ON: High beam headlights on OFF: High beam headlights off - Engine Engine condition/Run or Stop Run: Engine running Stop: Engine stopped - FR Wheel Speed Front right wheel speed/0 to 327.67 km/h Condition can be displayed - FL Wheel Speed Front left wheel speed/0 to 327.67 km/h Condition can be displayed - Vehicle Acceleration Vehicle acceleration/-455.65 to 445.6 m/s 2 Condition can be displayed - Leveling Motor Slave Status of the swivel motor Slave/Normal or Abnormal Condition can be displayed - Leveling Motor Over-Run Status of the swivel motor over-run/Normal or Abnormal Condition can be displayed - +B IG power supply voltage value/0 to 19.75 V 11 to 14 V
3. CLEAR FREEZE FRAME DATA NOTE: Clearing the DTCs will also clear the Freeze Frame Data. Connect the Techstream to the DLC3. Turn the engine switch on (IG). Clear the DTC and Freeze Frame Data. Refer to «DTC CHECK / CLEAR [03/2012 - ]»(ref-602572-S39476733052014030500000) .

FAIL-SAFE CHART [03/2012 - ]

1. HID HEADLIGHT SYSTEM The light control ECU operates in fail-safe mode if an abnormal condition such as those listed below has been detected. Item Outline Detection of abnormal input voltage (High input voltage) If voltage that is input to the light control ECU is approximately 20 V or more, the ECU stops illuminating the headlights, and resumes when the voltage drops to 16 V or less. Detection of abnormal input voltage (Low input voltage) If voltage that is input to the light control ECU is 6 V or less, the ECU stops illuminating the low beam headlights, and resumes when the voltage becomes 10 V or more. Detection of abnormal output Open in output side circuit Short between output terminals Short between output terminal and body ground If an abnormal condition occurs in the voltage that is output by the light control ECU, the ECU stops illuminating the low beam headlights and will maintain this state until the power is reinstated (by turning the light control switch from off to head position). Detection of abnormal light voltage (Low light voltage) Approximately 80 seconds after input voltage is supplied, if the light voltage is below approximately 31 V for approximately 0.5 seconds, the light control ECU stops illuminating the low beam headlights and will maintain this state until the power is reinstated (by turning the light control switch from off to head position). Detection of abnormal light voltage (High light voltage) If the light voltage is above approximately 69 V for approximately 0.5 seconds, the light control ECU stops illuminating the low beam headlights and will maintain this state until the power is reinstated (by turning the light control switch from off to head position).
2. AUTOMATIC LIGHT CONTROL SYSTEM If the main body ECU (multiplex network body ECU) detects a malfunction in the automatic light control sensor, the main body ECU (multiplex network body ECU) performs fail-safe control to prohibit the automatic light control. If the low beam headlights and taillights are on, the lights will remain on until the light control switch is turned off.
3. AUTOMATIC HEADLIGHT BEAM LEVEL CONTROL SYSTEM If the AFS ECU (headlight swivel ECU assembly) detects a malfunction in the automatic headlight beam level control system, it will take the actions indicated in the table below. Item Fail-safe Control for Automatic Headlight Beam Level Control Return Condition Master Warning Light Multi-information Display AFS OFF Indicator Light Headlight Swivel Motor Malfunction (LIN Communication malfunction) Normal Side Headlight Swivel Motor Stops the operation after returning to the initial position (Fail at higher than the initial position). Stops at the current position (Fail at lower than the initial position). Normal LIN communication signal is detected. ON CHECK HEADLIGHT LEVELING SYSTEM Not illuminated Abnormal Side Headlight Swivel Motor Stops the operation after returning to the initial position (Fail at higher than the initial position). Stops at the current position (Fail at lower than the initial position). Headlight Swivel Motor Malfunction (Open, Short or Over Heat) Normal Side Headlight Swivel Motor Stops the operation after returning to the initial position (Fail at higher than the initial position). Stops at the current position (Fail at lower than the initial position). Engine switch is turned on (IG) again. ON CHECK HEADLIGHT LEVELING SYSTEM Not illuminated Abnormal Side Headlight Swivel Motor Stops at the current position. Headlight Swivel Motor Malfunction (Voltage Malfunction) Normal Side Headlight Swivel Motor Stops the operation after returning to the initial position (Fail at higher than the initial position). Stops at the current position (Fail at lower than the initial position). Normal condition is detected for 200 ms consecutively. OFF - Not illuminated Speed Sensor Signal Malfunction Continues to control using the normal speed sensor signal if one signal fails. Judges that the vehicle speed is 0 km/h and continues to control if both speed sensor signals fail. Normal condition is detected. ON CHECK HEADLIGHT LEVELING SYSTEM Not illuminated Height Control Sensor Power Source Malfunction Stops the operation after returning to the initial position (Fail at higher than the initial position). Stops the operation at the current position (Fail at lower than the initial position). Engine switch is turned on (IG) again. ON CHECK HEADLIGHT LEVELING SYSTEM Not illuminated Rear Height Control Sensor Signal Malfunction Stops the operation after returning to the initial position (Fail at higher than the initial position). Stops the operation at the current position (Fail at lower than the initial position). Normal signal is detected 4 times consecutively. ON CHECK HEADLIGHT LEVELING SYSTEM Not illuminated CAN Communication Malfunction Skid Control ECU Judges that the vehicle speed is 0 km/h (0 mph) and continues control. Normal CAN communication is detected. ON CHECK HEADLIGHT LEVELING SYSTEM Not illuminated Steering Angle Sensor Normally controls the system. Others Continues control. AFS ECU Malfunction Continues control. Engine switch is turned on (IG) again. ON CHECK HEADLIGHT LEVELING SYSTEM Not illuminated Height Control Sensor Initialization not performed Locked Initialization is finished. OFF - Flashes Height Control Sensor Data Malfunction when Initializing Locked Initialization is finished. ON CHECK HEADLIGHT LEVELING SYSTEM Not illuminated Vehicle Specification not stored Locked Vehicle specification is stored. OFF - Flashes Variation Error Locked Variation is normal. ON CHECK HEADLIGHT LEVELING SYSTEM Not illuminated