Lighting and Horns: Description and Operation
LIGHTING: LIGHTING SYSTEM: SYSTEM DIAGRAM
SYSTEM DESCRIPTION
1. FUNCTION OF MAIN COMPONENTS
2. OPERATION DESCRIPTION
(a) Manual lighting system (Front lighting system)
(1) The main body ECU RH receives the following signals (A):
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 RH sends the following signals to the rear multiplex network ECU based on the signal listed in A (B):
Headlight ON demand signal:
Sent when light switch head signal is received.
Taillight ON demand signal:
Sent when light switch tail signal and light switch head signal are received.
High beam ON signal:
Sent when light switch high beam signal is received.
Front fog light ON signal:
Sent when light switch tail and front fog switch signals are received.
(3) The rear multiplex network ECU controls the following parts based on the signals listed in B:
Headlight (low)
Headlight (high)
Clearance light
Front fog light
(b) Manual lighting system (Rear lighting system)
(1) The main body ECU RH receives the following signals (A):
Light switch tail signal
(2) The main body ECU RH sends the following signals to the front light ECU based on the signal listed in A (B):
Taillight ON demand signal:
Sent when light switch tail signal and light switch head signal are received.
(3) The front light ECU controls the following parts based on the signals listed in B:
Taillight
License plate light
(c) Automatic light control system
(1) The main body ECU RH receives the following signals (A):
Light switch auto signal
Automatic light control sensor signal
(2) The main body ECU LH sends the following signals to the front light ECU and rear multiplex network ECU based on the signal listed in A (B):
Headlight ON demand signal:
Sent according to the illumination information from the automatic light control sensor when the light switch auto signal is received.
Taillight ON demand signal:
Sent according to the illumination information from the automatic light control sensor when the light switch auto signal is received.
(3) The front light ECU controls the following parts based on the signals listed in B:
Headlight (low)
Clearance light
(4) The rear multiplex network ECU controls the following parts based on the signals listed in B:
Taillight
License plate light
(d) Turn signal light system
(1) The main body ECU LH receives the following signals (A):
Right turn signal
Left turn signal
(2) The main body ECU LH sends the following signals to the turn signal relay based on the signal listed in A (B):
Right turn ON demand signal
Sent when the right turn signal is received.
Left turn ON demand signal
Sent when the left turn signal is received.
(3) The turn signal relay controls the following parts based on the signals listed in B
Right turn signal light
Left turn signal light
(e) Light auto cut system
(1) The main body ECU RH receives the following signals (A):
Light switch tail signal
Light switch head signal
Light switch auto signal
Front fog switch signal
Power switch signal
Automatic light control sensor signal
Driver's seat courtesy switch signal
(2) The main body ECU RH sends the following signals to the main body ECU LH based on the signal listed in A (B):
Headlight ON demand signal
Terminates communication when the power switch signal terminates and the driver seat courtesy switch signal is received while sending the headlight ON demand signal. The headlight ON demand signal results from receiving the light switch head signal or the illumination information from the light control signal.
Taillight ON demand signal
Terminates communication when the power switch signal terminates and the driver seat courtesy switch signal is received while sending the taillight ON demand signal. The taillight ON demand signal results from receiving the light switch tail signal or illumination information from the light control signal.
(3) The main body ECU LH controls the following parts based on the signals listed in B:
Headlight (low)
Headlight (high)
Clearance light
Front fog light
(4) The main body ECU RH controls the following parts based on the signals li
Taillight
License plate light
(f) Stop light system
(1) The rear multiplex network ECU receives the following signals (A):
Stop light switch signal
(2) The rear multiplex network ECU sends the following signals to the rear multiplex network ECU based on the signal listed in A (B):
Stop light ON demand signal
(3) The rear multiplex network ECU controls the following parts based on the signals listed in B:
Stop light
High-mounted stop light
(g) Back-up light system
(1) The rear multiplex network ECU receives the following signals (A):
Shift position R signal
(2) The rear multiplex network ECU sends the following signals to the rear multiplex network ECU based on the signal listed in A (B):
Back-up light ON demand signal
(3) The rear multiplex network ECU controls the following parts based on the signals listed in B:
Back-up light
(h) Illuminated entry system
(1) The main body ECU RH receives the following signals (A):
Driver side door courtesy light switch signal
Front passenger side door courtesy light switch signal
Rear door courtesy light switch LH signal
Rear door courtesy light switch RH signal
Driver side door lock signal
Front passenger side door lock signal
Rear door lock LH signal
Rear door lock RH signal
Power switch signal
(2) The main body ECU RH sends the following signals to the overhead junction block based on the signal listed in A (B):
Illumination ON demand signal:
Sent when the respective door courtesy switch signal or door lock signal is received.
(3) The overhead junction block controls the following parts based on the signals listed in B:
Front room light
(i) Rear room light
(1) The main body ECU RH receives the following signals (A):
Rear door courtesy light switch LH
Rear door courtesy light switch RH
(2) The main body ECU RH sends the following signals to the overhead junction block based on the signal listed in A (B):
Rear room light LH ON demand signal
Sent when the rear door courtesy switch LH signal is received.
Rear room light RH ON demand signal
Sent when the rear door courtesy switch RH signal is received.
(3) The overhead junction block controls the following parts based on the signals listed in B:
Rear seat light LH
Rear seat light RH
(j) Foot light system
(1) The main body ECU RH receives the following signals (A):
Driver side door courtesy light switch signal
Front passenger side door courtesy light switch signal
Rear door courtesy light switch LH signal
Rear door courtesy light switch RH signal
Driver side door lock signal
Front passenger side door lock signal
Rear door lock LH signal
Rear door lock RH signal
Shift position P signal
Power switch signal
(2) The main body ECU RH sends the following signals to the main body ECU RH based on the signal listed in A (B):
Foot light ON demand signal
Sent when the respective door courtesy SW signal or door lock signal is received or when the shift position P and power switch signals are received.
(3) The main body ECU RH controls the following parts based on the signals listed in B:
Front foot light
Rear interior illumination light
(k) Door courtesy light lighting system
(1) The main body ECU RH receives the following signals (A):
Driver side door courtesy light switch signal
Front passenger side door courtesy light switch signal
Rear door courtesy light switch LH signal
Rear door courtesy light switch RH signal
(2) The main body ECU RH sends the following signals to the each door ECU based on the signal listed in A (B):
Courtesy light ON demand signal:
Sent when the respective door courtesy switch signal is received.
(3) The each door ECU controls the following parts based on the signals listed in B:
Door courtesy light illumination
(l) AFS
(1) The AFS ECU receives the following signals (A):
Headlight ON demand signal
Daytime running light ON demand signal
Generator L terminal signal
Shift position signal
Zero point value stored in steering angle sensor
Steering angle sensor signal
Vehicle height sensor signal
Vehicle speed signal
AFS OFF switch signal
(2) The AFS ECU RH sends the following signals to the AFS ECU based on the signal listed in A (B):
Leveling actuator operation demand
Drives based on the vehicle height sensor signal when the headlight ON demand signal or generator L terminal signal is received and the daytime running light ON demand signal is not received.
Swivel motor operation demand
Drives according to the vehicle speed signal and steering angle sensor signal when the headlight ON demand signal, alternator L terminal signal and zero-point value stored in the steering angle sensor are received and the daytime running light ON demand signal, shift position R and N signals, and AFS OFF switch signal are not received.
AFS warning signal
Sent when an abnormality is detected in the respective signal or system.
AFS OFF indicator signal
Sent when the AFS OFF switch is pushed.
(3) The AFS ECU controls the following parts based on the signals listed in B:
Headlight leveling actuator LH
Headlight leveling actuator RH
Swivel motor LH
Swivel motor RH
AFS OFF indicator light
(m) Headlight beam level control system
(1) The headlight beam level control ECU receives the following:
HEAD relay ON signal
Vehicle height sensor signal
Vehicle speed signal
(2) The headlight beam level control ECU receives the signals and controls the following:
Level control motor operation demand signal:
Sent based on the vehicle height sensor signal and vehicle speed sensor when the HEAD relay ON signal is received.
Headlight beam level control warning indicator light signal:
Sent to the combination meter via cowl side junction block ECU LH when the headlight beam level control ECU is malfunctioning.
(3) The headlight beam level control ECU receives the signals and controls the following:
Headlight beam level control motor
Headlight beam level control warning indicator light