Lighting and Horns: Description and Operation

LIGHTING: LIGHTING SYSTEM:

SYSTEM DIAGRAM













Input and output signal of each ECU






SYSTEM DESCRIPTION

1. PARTS DESCRIPTION






2. OPERATION DESCRIPTION
(a) Manual lighting system
(1) The main body ECU receives the following:

- Light switch tail signal
- Light switch head signal
- Light switch high beam signal
- Front fog switch signal
- Lighting system passing signal
(2) The main body ECU controls the following based on the signals listed in (1).

- H-LP relay ON signal
Sent when light switch head signal is received.
- T-LP relay ON signal
Sent when light switch tail signal and light switch head signal are received.
- DIM relay ON signal
Sent when light switch high beam signal is received.
- FR FOG relay ON signal
Sent when light switch tail and front fog switch signals are received.
(3) The main body ECU controls the on / off operation of the following based on the signals listed in (2):

- Headlight (low)
- Headlight (high)
- Clearance light
- Side marker light
- Front fog light
- Taillight
- License plate light
- Room lights

(b) Automatic lighting system
(1) The main body ECU receives the following:

- Light switch auto signal
- Light control switch signal
(2) The main body ECU controls the following based on the signals listed in (1):

- H-LP relay ON signal
Sent according to the illuminance information from the light control signal when the light switch auto signal is received.
- T-LP relay ON signal
Sent according to the illuminance information from the light control signal when the light switch auto signal is received.
(3) The main body ECU controls the on / off operation of the following based on the signals listed in (2).

- Headlight (low)
- Clearance light
- Side marker light
- Taillight
- License plate light

(c) Daytime running light system
(1) The main body ECU receives the following:

- Light switch tail signal
- Light switch head signal
- Light switch auto signal
- Light control signal
- Ready condition signal
- Parking brake switch signal
(2) The main body ECU controls the following based on the signals listed in (1).

- H-LP relay ON signal
Sent when the ready condition signal has been received but the light switch head and parking brake switch signals have not been received.
Sent when the ready condition signal has been received but the parking brake switch signal and the illuminance information from the light control have not been received while receiving the light switch auto signal.
- DIM relay ON signal
Sent when the relay condition signal has been received but the light switch head and parking brake switch signals have not been received.
Sent when the ready condition signal has been received but the parking brake switch signal and the illuminance information from the light control have not been received while receiving the light switch auto signal.
- DRL NO. 4 relay ON signal
Sent when the ready condition signal has been received but the light switch head and parking brake switch signals have not been received.
Sent when the ready condition signal has been received but the parking brake switch signal and the illuminance information from the light control have not been received while receiving the light switch auto signal.
- PWM output signal
Sent when the ready condition signal has been received but the light switch tail, light switch head, and parking brake switch signals have not been received.
Sent when the ready condition signal has been received but the parking brake switch signal and the illuminance information from the light control have not been received while receiving the light switch auto signal.
(3) The main body ECU controls the following based on the signals listed in (2):

- Headlight (Low)

(d) Light auto turn off system
(1) The main body ECU receives the following:

- Light switch tail signal
- Light switch head signal
- Light switch auto signal
- Front fog switch signal
- Power switch signal
- Light control signal
- Driver's seat courtesy switch signal
(2) The main body ECU controls the following based on the signals listed in (1).

- H-LP relay ON signal
Terminates communication when the power switch ON (IG) signal terminates and the driver's seat courtesy switch signal is received while sending the H-LP relay ON signal. The H-LP relay ON signal results from receiving the light switch head signal and illuminance information from the light control signal.
- T-LP relay ON signal
Terminates communication when the power switch ON (IG) signal terminates and the driver's seat courtesy switch signal is received while sending the T-LP relay ON signal. The T-LP relay ON signal results from receiving the light switch head signal and illuminance information from the light control signal.
(3) The main body ECU controls the on / off operation of the following based on the signals listed in (2).

- Headlight (low)
- Headlight (high)
- Clearance light
- Side marker light
- Front fog light
- Taillight
- License plate light

(e) Illuminated entry system
(1) The main body ECU receives the following:

- Driver side door courtesy switch signal
- Front passenger side door courtesy switch signal
- Rear LH side door courtesy switch signal
- Rear RH side seat door courtesy switch signal
- Driver side door lock signal
- Passenger side door lock signal (w/ Smart key system, w/ Theft deterrent system)
- Power switch signal
(2) The main body ECU controls the following based on the signals listed in (1):

- Illumination ON demand signal
Sent when the respective door courtesy switch signals are received.
Sent when the respective door lock signals are received.
Sent when the power switch ON (IG) and power switch ON (ACC) signals are not received.
(3) The main body ECU controls on / off and fade-in / fade-out operations of the following based on the signals listed in (2):

- Key slot light
- No. 1 room light
- Personal light (Overhead junction block)

(f) Auto headlight leveling system
(1) The headlight beam level control ECU receives the following:

- H-LP relay ON signal
- Vehicle height sensor signal
- Vehicle speed signal
(2) The headlight beam level control ECU controls the following based on the signals listed in (1).

- Leveling motor operation demand signal.
Sent based on the vehicle height sensor signal and vehicle speed sensor when the H-LP relay ON signal is received.
The headlight beam level control ECU receives vehicle speed signal and determines the driving condition according to the table below, and then starts / terminates controlling on the headlight leveling actuator.





(3) The headlight beam level control ECU controls the following based on the signal listed in (2).

- Headlight beam leveling actuator