Tail/Head Lamp Control

Tail/Head Lamp sub functions are controlled by MFSW, IPM and FAM.

The Tail Lamps are turned on and off by Tail Lamp Switch or Auto Light.

The Head Lamps Low and High are turn on and off by Head Lamp Switch or Auto Light.

The DRL controls Head Lamp High when the engine is running.

The Head Lamp High is on when the Passing switch is on.

1. MFSW: lamp switch control

   Input detection of lamp switches (Lamp Off, Tail Lamp, Head Lamp Low, Head Lamp High, Passing, and Auto Light)

   Generate Light Switch Status data compounding by some switch input (Lamp Off, Tail Lamp, Head Lamp Low, Auto Light) for

   FAM and IPM.

   Generate Head Lamp High switch data for FAM

   Generate Passing switch data for FAM

   Send Light Switch Status, Head Lamp High Switch and Passing Switch data via CAN

2. IPM: Auto light contorl

   The IPM detects Input of Auto Light Sensor level.

   When IGN switch is ACC or IGN or cranking state, the IPM generates CAN signal Auto Light Out Status for FAM.

   * Behaviour for normal state

   From ACC ON state, the IPM monitors the range of this supply and raises up a failure as the supply's voltage is out of range (that is less than 4 Volts, more than 6 Volts).

   The filtering of the error is 300ms to rise up this one, and also 300ms to clear this one.

   Then this failure occurs and as long as this is present, the head lamp low must be turned on, that IPM sends (Auto Light Out Status), without taking care about the sunlight level provided by the sensor.

3. FAM: Auto Light Control

   The FAM controls tail and head lamp low with filtering time according to (Auto Light Out Status)

   The FAM controls continuous turn on mode.

   * Behaviour for normal state

   If the state of IGN Switch FAM is IGN or ST and Light Switch Status state is Auto Light Switch On, then TAIL LAMP RELAY output and HEAD LAMP LOW RELAY output are controlled by FAM with filtering time in accordance with Auto Light Out Status state change that is AUTO LIGHT Sensor's INPUT from IPM and according to specifications for each lamp described in below.

4. FAM: Tail Control

   The FAM memorizes the AUTO CUT state in EEPROM and describes the following features.

   1. Turn on and off Tail Lamp by Light switch.
   2. Turn on and off Tail Lamp by Auto Light out Status.
   3. Automatically cut the Tail Lamps if the driver forgets to turn them off.
   4. Output control of Tail Lamp relay
   5. Generate Tail Lamp Activity data.
5. FAM: Head lamp Control
   1. Turn on and off Head Lamp Low by Light Switch Status.
   2. Turn on and off Head Lamp High by Light Switch Status.
   3. Turn on and off Head Lamp Low by Auto Light out Status.
   4. Turn on and off Head Lamp High and Low by Passing Switch.
   5. Output control of Head Lamp Low Relay.
   6. Output control of Head Lamp High IPS by PWM Control.
   7. Generate Head Lamp High IND data for CLU.
   8. Generate Head Lamp Low IND data for CLU.
   9. Generate Head Lamp High Activity data for Front Fog Lamp.
   10. Generate Head Lamp Low Activity data for Front and Rear Fog Lamp.
6. FAM: DRL Control

   Turn on and off DRL by some condition, using Head Lamp High DRL Relay outputs with dimmed intensity compared with normal High Beam operation.