Wiper Control

Control of front washer interlocking wiper

Fig 1: BCM Communication Diagram - Control Of Front Washer Interlocking Wiper
Courtesy of HYUNDAI MOTOR CO.
1. In a state of IGN2 switch = ON, if WASHER switch is turned on during T1, Wiper low relay is turned ON T2 after Washer switch = ON, and Wiper low relay is OFF after T3.
  
  Fig 2: Wiper Low Relay Blinking Pattern
  Courtesy of HYUNDAI MOTOR CO.
  
  T1: 0.06s ~ 0.2s, T2: 0.3s ± 0.1s, T3: 0.7s ± 0.1s
2. In a state of IGN2 switch=ON, If Washer switch is ON during T1, Wiper low relay is turned ON T2 after Washer switch = ON. Wiper low relay is turned OFF T3 after Washer switch = OFF.
  
  Fig 3: IGN2 Blinking Pattern
  Courtesy of HYUNDAI MOTOR CO.
  
  T1: 0.2s (MIN), T2: 0.3s ± 0.1s, T3: 2.5s ~ 3.8s (2~3 Turn)
3. If washer switch is ON T1 or more by Wiper INT switch during wiper operation, It operates item (2). And if washer switch is ON during T6, it operates Item (1).
  
  Fig 4: Washer Switch Blinking Pattern
  Courtesy of HYUNDAI MOTOR CO.
  
  T1: 0.2s (MIN), T2: 0.3s ± 0.1s, T3: 2.5s ~ 3.8s (2~3 Turn), T4: T5 - 0.7s, T5: INT TIME, T6: 0.06s ~ 0.2s, T7: 0.7s ± 0.1s
4. Operation is cancelled in case of IGN=OFF during T3.
5. Give priority to Washer interlocking wiper than speed sensing INT wiper function.
6. Washer switch signal input shall be ignored at start-up (IGN1 ON& IGN2 OFF states).
7. Switch ON time includes chattering time.
MIST wiper control

Fig 5: BCM Communication Diagram - MIST Wiper Control
Courtesy of HYUNDAI MOTOR CO.
1. When turning on wiper mist switch with IGN2 ON, turning ON wiper low relay output for 700 ms.
  
  Fig 6: IGN2 Blinking Pattern
  Courtesy of HYUNDAI MOTOR CO.
  
  T1: Min 60 ms, T2: Max 100 ms, T3: 700±100 ms
2. If Wiper Mist switch input lasts for over 700 ms, maintain Wiper low relay ON. IF Wiper Mist switch is OFF, turn ON Wiper low relay output for 700 ms from it is turned OFF.
  
  Fig 7: Wiper Mist Switch Blinking Pattern
  Courtesy of HYUNDAI MOTOR CO.
  
  T1: Min 60 ms, T2: Max 100 ms, T3: 700±100 ms, T4: 700 ms
INT wiper control

Fig 8: BCM Communication Diagram - INT Wiper Control
Courtesy of HYUNDAI MOTOR CO.
1. Intermittent time of intermittent wiper is controlled dependent on the following conditions.
  1. Wiper low relay time is 0.7s ± 0.1s.
  2. Intermittent time is from output ON to the next output ON.
  3. Wiper low relay output is continued for remaining ON time if INT switch is turned OFF during output.
  4. Intermittent time is restarted when IGN2 switch is ON and Wiper INT switch is changed from OFF to ON.
  5. Intermittent time is restarted when Wiper INT switch is ON and IGN2 switch is changed from OFF to ON.
  6. 2.5 V is used when VOLUME value is 2.5 V or more.
    
    Fig 9: Wiper Int Switch Blinking Pattern
    Courtesy of HYUNDAI MOTOR CO.
    
    T1: 0.7s ± 0.1s, T2: INT TIME (2.2 ± 0.2s ~ 10 ± 1s)
Rear wiper control
1. If IGN2 switch=ON and Rear washer switch is turned on during T2, Rear wiper relay is turned ON T1 after Rear washer switch=ON. And Rear wiper relay is OFF after T3.
  
  Fig 10: IGN2 Switch Blinking Pattern
  Courtesy of HYUNDAI MOTOR CO.
  
  T1: 0.3s, T2: 0.2 ~ 0.59s, T3: 0.7s
2. If IGN2 switch=ON and Rear washer switch is ON more than T2, Rear wiper relay is turned ON later T1 after Rear washer switch=ON. And Rear wiper relay is turned OFF after T3 from Rear washer switch=OFF.
  
  Fig 11: Rear Washer Switch Blinking Pattern
  Courtesy of HYUNDAI MOTOR CO.
  
  T1: 0.3s, T2: MIN 0.6s, T3: 2.5s ~ 3.8s
3. If IGN2 switch=ON and Rear wiper INT switch=ON is, Rear wiper relay outputs ON. At this time, If IGN2 switch=OFF or Rear wiper INT switch=OFF, Rear wiper relay outputs OFF.
  
  Fig 12: Rear Wiper Relay Blinking Pattern
  Courtesy of HYUNDAI MOTOR CO.
4. If IGN2 switch=ON and Rear wiper INT switch=ON, Rear wiper relay outputs T1 (ON)/T2 (OFF) cycle. At this time, if IGN2 switch=OFF or Rear wiper INT switch=OFF, Rear wiper relay outputs OFF.
  
  Fig 13: Rear Wiper Int Switch Blinking Pattern
  Courtesy of HYUNDAI MOTOR CO.
  
  T1: 0.7s, T2: 5.3s