Lighting System (Diagnostics - Introduction) (Base): Other Toyota Prius Plug-in

PRECAUTION

1. PRECAUTION FOR HEADLIGHT BULB REPLACEMENT If even a thin film of oil is left on the surface of 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. 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.

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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
3. DAYTIME RUNNING LIGHT SYSTEM (for Canada) COMMUNICATION TABLE Transmitter Receiver Line Data Name Power Management Control ECU Main Body ECU (Multiplex Network Body ECU) CAN READY condition signal
4. DAYTIME RUNNING LIGHT SYSTEM (except Canada) COMMUNICATION TABLE Transmitter Receiver Line Data Name Power Management Control ECU Main Body ECU (Multiplex Network Body ECU) CAN READY condition signal
5. LED HEADLIGHT SYSTEM COMMUNICATION TABLE Transmitter Receiver Line Data Name Main Body ECU (Multiplex Network Body ECU) Combination Meter Assembly CAN Lighting System State Signal Main Body ECU (Multiplex Network Body ECU) Combination Meter Assembly CAN Warning Indicator
6. AUTOMATIC HEADLIGHT BEAM LEVEL CONTROL SYSTEM

CUSTOMIZE PARAMETERS

1. CUSTOMIZING FUNCTION WITH TECHSTREAM 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. Connect the Techstream to the DLC3. Turn the power switch on (IG). Turn the Techstream on. Enter the following menus: Customize Setting / Light Control. 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 power switch off and closing all the doors with the low beam headlights on. Off, 30 s, 60 s or 90 s Response Time*1 0.1 s Changes the delay timing of lighting the taillights when going into a tunnel when the light control switch is in the AUTO position 0.1 s or 1.0 s Sensitivity Normal Adjusts the sensitivity of the automatic light control system.*C Light2, Light1, Normal, Dark1 or Dark2 DRL Function*2 ON ON/OFF of the DRL function ON or OFF *1: w/o DRL *2: Headlight dimmer switch with DRL 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
2. CUSTOMIZING FUNCTION WITH MULTI-DISPLAY (w/ Navigation System (for Navigation Receiver Type) or w/ Audio and Visual System (w/o Daytime Running Light)) 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. Turn the power switch on (IG). Enter the following menus: 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 power switch off and closing all doors with the low beam headlights on. Off, 30 sec., 60 sec. or 90 sec. Daytime Running Lights*1 On ON/OFF of the DRL function On or Off *1: Headlight dimmer switch with DRL OFF function. 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
3. CUSTOMIZING FUNCTION WITH MULTI-DISPLAY (w/ Navigation System (for Radio and Display Type) or w/ Audio and Visual System (w/ Daytime Running Light)) 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. Turn the power switch on (IG). Enter the following menus: SETUP / Vehicle. Select the setting by referring to the table below. VEHICLE SETTINGS 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 Adjust 30 sec. Keeps the headlights on for a certain period of time after turning the power switch off and closing all doors with the low beam headlights on. Off, 30 sec., 60 sec. or 90 sec. Daytime Running Lights*1 On ON/OFF of the DRL function On or Off *1: Headlight dimmer switch with DRL OFF function. 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

INITIALIZATION

Note. Initialize the headlight leveling ECU assembly (set the zero point of the height control sensor in the headlight leveling ECU assembly) after the vehicle height changes due to replacement of the suspension or after performing such operations as removal and reinstallation or replacement of the rear height control sensor sub-assembly RH. When the headlight leveling ECU assembly is replaced, initialization is also necessary. Adjust the headlight aim after initializing the headlight leveling ECU assembly. Refer to ADJUSTMENT . 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. PREPARE VEHICLE FOR INITIALIZATION Unload the vehicle and its trunk, 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
2. CHECK HEADLIGHT BEAM LEVEL CONTROL INDICATOR LIGHT Turn the power switch on (IG), and check the indicator light. OK Condition Specified Condition The headlight leveling ECU assembly is replaced with a new one. Indicator light continuously blinks 6 times at 2 Hz. Removal and reinstallation of the headlight leveling 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. is 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 power switch on (IG), inspect and repair it according to Problem Symptoms Table. Refer to «PROBLEM SYMPTOMS TABLE»(ref-551401-S08511508372013051500000) . NG --> GO TO «PROBLEM SYMPTOMS TABLE»(ref-551401-S08511508372013051500000) OK: Go to next step
3. 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 indicator light. OK Condition Specified Condition The headlight leveling ECU assembly is replaced with a new one. Blinks 6 times at 2 Hz --> Continuously blinks N*1 times at 2 Hz. 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. is 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 power switch off. Then, restart from the first step. NG --> GO TO «PROBLEM SYMPTOMS TABLE»(ref-551401-S08511508372013051500000) OK --> TURN POWER SWITCH OFF (END)

FAIL-SAFE CHART

1. LED HEADLIGHT SYSTEM The light control ECU operates in fail-safe mode if an abnormal condition such as those listed below has been detected. Item Abnormality Detection Condition Return Condition Master Warning Light Multi-information Display Abnormal input voltage (High input voltage) Abnormal power source voltage (more than 17 V) is detected. Normal power source voltage (10 to 16 V) is detected. Flashes CHECK HEADLIGHT SYSTEM Abnormal input voltage (Low input voltage) Abnormal power source voltage (less than 10 V) is detected. Normal power source voltage (10 to 16 V) is detected. Flashes CHECK HEADLIGHT SYSTEM Abnormal output Open in output side circuit Short between output terminal and body ground Light control switch is turned off. Flashes CHECK HEADLIGHT SYSTEM
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 The headlight leveling ECU assembly operates in fail-safe mode if an abnormal condition such as those listed below has been detected, and keep the last low beam status. 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. Abnormal voltage is not detected for 5 seconds consecutively 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. High power source voltage Abnormal high IG supply 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 IG supply voltage (9.0 V or less) is detected. Voltage of 9.3 V or more is detected for 0.1 seconds consecutively Not illuminated Height control sensor data out of range Height control sensor data out of range when performing initialization of the headlight leveling ECU assembly Vehicle condition is proper for initialization. Illuminated Variation error Headlight leveling ECU assembly for another destination is installed on the vehicle Headlight leveling ECU assembly for proper destination is installed on the vehicle Illuminated