Turn Signal Lamp Control

The Turn Signal Lamp Control function controls turn signal lamps and indicators.

Fig 1: Turn Signal Lamp Control - System Diagram

Courtesy of HYUNDAI MOTOR AMERICA

The Turn Signal/Hazard Control FAM controls Lamps

• Normal or Double blinking by Hazard Switch or Turn signal Switches with ignition on condition

1. FAM: Normal Operating Condition

   While IGN Switch FAM is IGN state, if Turn Signal RH Switch or Turn Signal LH Switch or Hazard switch is ON then turn signal outputs are turned ON following the switch input (LEFT, RIGHT or HAZARD).

   Fig 2: Turn Signal Lamp Control System Blinking Pattern (FAM Normal Operating Condition)

   Courtesy of HYUNDAI MOTOR AMERICA
2. FAM: Double Blinking Condition

   In case of activation of hazard the fault detection will be able to detect the failure only if 3 bulbs are broken-down. The double blinking works at IGN Switch FAM is IGN state, double blinking for Hazard.

   In case of turn signal activation when one of the FRONT or REAR is broken-down (Lamp failure), the turn signal blinks with double frequency.

   Fig 3: Turn Signal Lamp Control System Blinking Pattern (FAM Double Blinking Condition)

   Courtesy of HYUNDAI MOTOR AMERICA
3. FAM: SCG (SHORT CIRCUIT TO GND) Fault Condition

   If The FAM detects Short circuit to Ground, then FAM turns off the OUTPUT. The fault detection is carried out continuously, until fault is confirmed by FAM. Once FAM confirms SCG, FAM keeps the fault condition until flasher trigger condition is changed.

   Fig 4: Turn Signal Lamp Control System Blinking Pattern (FAM Short Circuit To Ground Fault Condition)

   Courtesy of HYUNDAI MOTOR AMERICA