Lighting System - Diagnostics: Overview Toyota Highlander I рестайлинг

SYSTEM DESCRIPTION

1. LIGHTING SYSTEM Illumination control system (Illuminated entry system): When a door is unlocked through a key or transmitter operation, or if a door is opened or closed, the illuminated entry system turns on the interior lamp and the ignition key illumination. The multiplex network body ECU receives the following. Door courtesy switch signal Door detection switch signal Ignition switch signal The multiplex network body ECU controls the following based on the signals listed in (1): Illumination operation signal The multiplex network body ECU controls the on/off and fade-in/fade-out operation of the following. Room lamp assy No.1 Ignition key cylinder lamp Personal lamp (Overhead J/B) Manual light control system: This system functions if lights such as the headlamps and tail lamps come on by manual operation of the light control switch. The multiplex network body ECU receives the following. Light control switch signal Fog lamp switch signal The multiplex network body ECU controls the following based on the signals listed in (1). HEAD relay operation signal TAIL relay operation signal FOG relay operation signal DRL relay No.2 DRL relay No.3 DRL relay No.4 The multiplex network body ECU controls the on/off operation of the following signals based on the signals listed in (2). Headlamp (Low) Clearance lamp Tail lamp License plate lamp Fog lamp Light auto turn off system: When the headlamps and tail lamps are on through the operation of the automatic light control system or through the light control switch, if the ignition switch is turned off and driver side door is opened, this system will turn the headlamps and tail lamps off immediately. The multiplex network body ECU receives the following. Door courtesy switch signal Ignition switch signal The multiplex network body ECU controls the following based on the signals listed in (1): HEAD relay operation signal TAIL relay operation signal The multiplex network body ECU controls the illuminating period based on the signals listed in (2). Headlamp (Low) Headlamp (Hi) Clearance lamp Tail lamp License plate lamp Fog lamp Automatic light control system: When the light control switch is in the AUTO position, the automatic light control sensor detects ambient light and automatically turns the headlamps and tail lamps on or off accordingly. The multiplex network body ECU receives the following. Light control switch signal Automatic light control sensor signal The multiplex network body ECU controls the following based on the signals listed in (1). HEAD relay operation signal TAIL relay operation signal The multiplex network body ECU controls the on/off operation of the following. Headlamp (Low) Clearance lamp Tail lamp License plate lamp Daytime running light system: This system is directly connected to the high-beam headlamps and is designed to automatically activate the daytime running light in order to remain highly visible to other vehicles. The multiplex network body ECU receives the following. Ignition switch signal Generator signal Parking brake switch signal Light control switch signal The multiplex network body ECU controls the following based on the signals listed in (1). DRL relay operation signal The multiplex network body ECU controls the on/off operation of the following. Headlamp (Hi)

OPERATION CHECK

1. ILLUMINATED ENTRY SYSTEM OPERATION CHECK Illuminated entry system controls the following lamps: Ignition key cylinder lamp Interior lamp (Room lamp assy No.1) Personal lamp (Overhead J/B) Check that the lamps come on after: Unlocking any door that was closed and locked with the ignition switch off. Check that the lamps fade out after: Leaving the doors unlocked for 15 seconds Turning the ignition switch to the ACC or ON position Locking all the doors Check that the lamps stay ON for at least 15 seconds after opening any of the doors, then fade out again after 15 seconds. Check that the lamps fade out after: Leaving the doors unlocked for 15 seconds Locking all the doors Check that the lamps stay ON for at least 15 seconds after opening any of the doors, then fade out again in 15 seconds after closing all the doors. Check that the lamps come on when opening any of the doors or turning the ignition switch off from the ACC or ON position.
2. LIGHT AUTO TURN OFF OPERATION CHECK Turn the ignition switch to the ON position, and switch the headlamps into the TAIL or HEAD position. Turn the ignition switch off and open the driver's door, and check that the headlamps go off immediately. Turn the ignition switch to the ON position, and switch the headlamps into the AUTO position. Turn the ignition switch off and open the driver's door when operating the automatic light control system, and check that the headlamps go off immediately.
3. AUTOMATIC LIGHT CONTROL OPERATION CHECK HINT: Perform the operation check at a location with bright surroundings. Turn the ignition switch to the ON position. Turn the headlamp dimmer switch to the AUTO position. Cover the automatic light control sensor and check that the tail lamp and headlamp in order. Uncover the automatic light control sensor and check that the headlamp and tail lamp go off in order.
4. DAYTIME RUNNING LIGHT OPERATION CHECK Check that the high beams come on when the headlamp switch is off with the engine running and parking brake released. Check that the high beams go off when turning the headlamp dimmer switch into the TAIL or HEAD (LOW) position under the condition as shown in (a). Check that the high beams go off when turning the ignition switch off under the condition as shown in (a).

See also:
• HOW TO PROCEED WITH TROUBLESHOOTING