KIA Niro: Body Control Module (BCM) / Description And Operation

Specifications

Schematic Diagrams

Connector Pin Information

Description

Body Control Module (BCM) function

1. Washer Linked Wiper

• If the washer switch is pressed ON for 0.06-0.2 second with the vehicle mode in IGN2, the wiper relay is turned ON 0.3+-0.1 second after washer switch ON, and then the wiper relay is turned OFF 0.7+-0.1 second later.
• If the washer switch is pressed ON for over 0.2 second with the vehicle mode in IGN2, the wiper relay is turned ON 0.3+-0.1 second after washer switch ON, and then the wiper relay is turned OFF 2.5-3.8 seconds (wiper activates 2-3 times) after washer switch OFF.

2. MIST Linked Wiper

• If the wiper mist switch is pressed ON for 0.7 second with the vehicle mode in IGN2, the wiper relay is turned ON, and then OFF 0.7 second later.
• If the wiper mist switch is pressed ON for over 0.7 second with the vehicle mode in IGN2, the wiper relay is turned ON, and then turned OFF 0.7 second after wiper mist switch OFF.

3. Variable INT Wiper

• If the INT wiper switch is turned ON with the vehicle mode in IGN2, INT wiper operates intermittently (10 -2.2 sec.) based on the INT volume setting.

4. Rear Defogger Deicer Timer

• If the defogger switch is turned ON with the vehicle mode in alternator ON, defogger relay is turned ON for 20 minutes.
• If the defogger switch is pressed one more time or if alternator mode is turned OFF while the defogger is ON, then the defogger relay is turned OFF.

5. KEY Inter Lock

• If the KEY INTER LOCK switch is turned OFF with the vehicle mode in IGN1 ON or ACC ON, the key solenoid output is turned ON and prevents the key from being removed.

6. ATM Shift Lock

• If brake switch is turned ON with the vehicle mode in IGN1 ON and the shift lever in P position, ATM solenoid is turned ON to unlock the shift lever.

7. Tailgate Release

• Tailgate release relay is turned ON for 0.2+-0.02 second if TX tailgate signal is received.
• If tailgate release switch is turned ON with all doors unlocked, tailgate release relay is turned ON for 0.2+-0.02 second. (However, Tailgate release switch is ignored when in ARMWAIT, ARM, REARM, or ALARM mode.)
• If Interior tailgete release switch is turned ON, tailgate release relay is turned ON for 0.2+-0.02 second. (However, Tailgate release relay is NOT turned ON of the vehicle speed is over 5km/h(3.1mi/h), or if the vehicle is in ARMWAIT, ARM, REARM, or ALARM mode.)

8. Power Window Timer

• Power window relay is turned ON when the vehicle mode is switched to IGN ON.
• When the vehicle mode is switched IGN ON → OFF, power window relay is turned ON for 30 seconds.
• If a door is opened during the 30 second power window relay ON period, the power window relay is immediately turned OFF.
• If a door is opened and the vehicle mode is switched IGN ON → OFF, power window relay is immediately turned OFF.

9. Seat Belt Reminder (Driver Side)

• If Seat belt is not fastened, Indicator is turned ON at the first IGN ON, then turned OFF when the seat belt is fastened.
• If the vehicle speed is over 20Km/h with Seat belt unfastened, Indicator blinks and chime buzzer is activated for 100 seconds.
• While the vehicle speed is over 20Km/h with the seat belt fastened, then the seat belt is unfastened, Indicator blinks and chime buzzer is activated for 100 seconds. (Reminder)
• If the Seat belt is fastened or the vehicle mode is switched to IGN OFF while 100 sec. buzzer is activating, the Indicator blinking and the buzzer is turned OFF.
• If the vehicle mode is switched to IGN ON with Seat belt unfastened, and vehicle speed exceeds 20Km/h with Indicator ON, Indicator blinks and chime buzzer is activated for 100 seconds.

10. Seat Belt Reminder (Passenger Side)

• If there is no one in the passenger seat, then the system operates as if seat belt is fastened.
• If Seat belt is not fastened, Indicator is turned ON at the first IGN ON, then turned OFF when the seat belt is fastened.
• If the vehicle speed is over 20Km/h with seat belt unfastened, Indicator blinks and chime buzzer is activated for 100 seconds.
• While the vehicle speed is over 20Km/h with the Seat belt fastened, then the seat belt is unfastened, Indicator blinks and chime buzzer is activated for 100 seconds. (Reminder)
• If the seat belt is fastened or the vehicle mode is switched to IGN OFF while 100 sec. buzzer is activating, the Indicator blinking and the buzzer is turned OFF.
• If the vehicle mode is switched to IGN ON with Seat belt unfastened, and vehicle speed exceeds 20Km/h with Indicator ON, Indicator blinks and chime buzzer is activated for 100 seconds.

11. Seat Belt Reminder (Rear)

• If Seat belt is not fastened, Indicator is turned ON for 35 seconds at the first IGN ON, then turned OFF when the seat belt is fastened.
• If the vehicle speed is over 20Km/h with seat belt unfastened, Indicator blinks and chime buzzer is activated for 35 seconds.
• If the vehicle speed is over 20Km/h with the seat belt fastened, then the seat belt is unfastened, Indicator blinks and chime buzzer is activated for 35 seconds. (Reminder)
• If the seat belt is fastened or the vehicle mode is switched to IGN OFF while 35 sec. buzzer is activating, the Indicator blinking and the buzzer is turned OFF.
• If the vehicle mode is switched to IGN ON with seat belt unfastened, and vehicle speed exceeds 20Km/h with Indicator ON, Indicator blinks and chime buzzer is activated for 35 seconds.

12. KEY Operated Warning

• If the driver door is opened with the KEY IN, buzzer is continuously activated at 1 second interval.
• The buzzer is turned OFF if KEY OUT or the door is closed while the chime buzzer is activated.

13. Parking Brake Warning

• If the vehicle speed exceeds 5Km/h(3.1mi/h) while the vehicle mode is in IGN1 and the parking brake is engaged, buzzer is sounded until the parking brake is released.

  (Buzzer activates at 0.6 second ON and 0.4 second OFF at 1 second interval until the parking brake is released.)

14. Decayed Room Lamp

• If a door is opened with the vehicle mode in IGN OFF, the room lamp is turned ON. If the door is closed, the room lamp is remained ON for 30 seconds then turned OFF. (dimmer 2+-0.2 sec.)
• If the door is remained opened, the room lamp is remained ON for 20 minutes, then turned OFF. (dimmer 2+-0.2 sec.)

15. KEY Hole Illumination

• Key illumination Lamp is turned ON if a door is opened while the vehicle mode in IGN1 switch OFF, and the Key illumination Lamp is turned OFF 30 seconds after the door is closed.
• If the vehicle mode is switched to IGN1 ON while Key illumination lamp is ON, then the lamp is immediately turned OFF.
• If the vehicle mode is switched to ARMWAIT while Key illumination lamp is ON, then the lamp is immediately turned OFF.

16. Tail Lamp Auto Cut

• If Tail switch is switched OFF→ ON, the tail relay is turned ON.
• If Tail switch is turned OFF, then the tail relay is turned OFF.
• If KEY IN switch OFF & Tail switch ON & Driver Door OPEN while in KEY IN switch ON & Tail switch ON, the tail relay is turned OFF. (Auto OFF)
• If KEY IN switch is turned ON after Auto OFF, then the tail relay is turned ON. Tail relay does not turn back ON even if the driver side door is opened → closed.

17. Head Lamp Escort

• If the vehicle mode is switched from IGN1 to IGN1 OFF, and the Head lamp is turned ON by Head lamp switch or auto light, then the Head lamp is remained ON.
• Head lamp is turned OFF in case of any of the following conditions.

1. 15 seconds after driver side door is opened → closed.
2. Head lamp or Auto light is not turned ON.
3. If driver side door is remained opened for over 5 minutes.
4. 20 minutes after the vehicle mode switching from IGN1 ON to IGN OFF.
5. If TX lock signal is received 2 times while H/Lamp is ON.

18. Head Lamp LOW / HIGH

• If Head lamp low is turned ON with head lamp low switch ON or auto light function, and head lamp high switch is ON (Self return), then the head lamp high is turned ON.
• Head lamp high can only be turned OFF with the passing switch.

19. Head Lamp PASSING

• Head lamp high activates only when the passing switch is turned ON and the vehicle mode is in IGN2 ON.
• The switch is used to turn OFF when the head lamp high is ON.

20. Front Fog Lamp

• If the front fog is turned ON while tail lamp is ON, then the front fog lamp is turned ON.
• If the front fog is turned OFF while the front fog lamp is ON, then the lamp is turned OFF.
• If the head lamp low is turned ON while front fog is ON, then the front fog lamp is turned ON.
• If the front fog is turned OFF while the front fog lamp is ON, then the lamp is turned OFF.

21. Auto Light Control

• If Auto light sensor is detects light ON condition, then the light is turned ON 2.5 seconds later.
• If the sensor detects light OFF condition, then the light is turned OFF 2.5 seconds later.
• If the sensor detects tail light ON condition, then only the tail lamp is turned ON. If the sensor detects head lamp ON condition, then both the tail lamp and the head lamp are turned ON.
• In case of head lamp ON condition, both the tail lamp and head lamp are turned ON regardless of tail switch ON/OFF status.

22. Daytime Running Light (DRL)

• DRL Lamp is turned ON when the engine is started.
• DRL Lamp is turned OFF if head lamp low or front fog lamp is turned ON.

23. Head Lamp Welcome

• If the vehicle mode is switched to KEY OFF, all doors are closed and locked while the Head lamp is turned ON (Head lamp switch or AUTO switch + night time), then RKE unlock is activated, the Head lamp is turned ON for 15 seconds.

24. AV Tail Linked

• When the vehicle mode is switched to ACC ON, the auto light sensor ambience is reflected.
• If Auto light ambience level is tail lamp ON condition for over 2.5 seconds, then ON signal is sent.
• If Auto light ambience level is tail lamp OFF condition for over 2.5 seconds, then OFF signal is sent.

25. PDW-R

• If the shift lever is switched to R position while the vehicle mode is in IGN1 ON, then buzzer is activated 0.5 second later.
• Warning level is displayed in the cluster and buzzer is activated corresponding to the warning condition.

26. Normal/ARMWAIT/ Relock Mode

• If TX lock signal is received while any one of the doors, hood, or trunk is opened, then only the lock signal is outputted. Hazard lamp is not turned ON and the vehicle does not enter the ARM mode.
• If any of the doors is not opened or KEY IN is not detected within 30 seconds after receiving TX unlock signal, then the vehicle returns to ARM mode.

27. Security Indicator Control

• If the vehicle is in ARMWAIT mode while KEY OUT, then Indicator is remained ON. Indicator blinks in interval if the vehicle is in any mode other than ARMWAIT. (Blink Interval: 2 sec. OFF, 0.3 sec. ON)

28. Alarm Condition

• If Alarm activation condition is detected, then start inhibit is turned ON to prevent engine start and the alarm is activated.

29. DISARM/Alarm Deactivation Condition

• If TX UNLOCK/LOCK switch signal is received, unlock/lock signal is outputted for 0.5 second, and START INHIBIT is turned OFF.
• If KEY IN switch ON & IGN1 switch ON & IGN2 switch ON & alternator ON is maintained for 30 seconds, then start inhibit is turned OFF and the vehicle mode is switched to DISARM.

30. RESET

• If the battery is disconnected while the alarm is activating, and then reconnected, then the alarm also reactivates.
• If the battery is disconnected while the vehicle is in ARM mode, and then reconnected, the vehicle maintains ARM mode.

31. Central Door Lock/ Unlock

• If Driver/Passenger side door KEY lock/unlock switch is turned ON within 3 seconds, then all door lock/unlock signal is outputted for 0.5 second.
• If TX lock/unlock signal is received, then all door lock/unlock signal is outputted for 0.5 second.
• If Driver door lock switch (Power window) is Lock/Unlock, then all door lock/unlock signal is outputted for 0.5 second.

32. Auto Door Lock

• If the vehicle mode is in IGN1 ON & alternator ON, and the vehicle speed is over15km/h(9.3mi/h), all doors are locked within 1.5 seconds. (However, if all doors are already locked or in case all door fail condition, then all door lock function is not executed.)
• If any one of the doors is unlocked after locking via above condition, then lock command is executed 3 times. (at 1 sec. interval). Unlocked door that is locked during the 3 attempts is ignored.
• Auto door lock function is not engaged in case of crash unlock condition.

33. Auto Door Unlock

• If KEY OFF after KEY IN, then all door unlock is executed.

  (However, if all doors are already unlocked, then the unlock command is not executed.)

34. Driver Door Unlock Switch Synchronized Auto Door Unlock

• If All doors are closed, and driver door unlock switch is switched from locked to unlocked, then all door unlock signal is outputted 1 time for 0.25 second.

35. Passive KEY Reminder

• Unlock is executed every time ACU signal is inputted when IGN switch is turned ON. Unlock output continues for the set duration even if the vehicle mode is switched from IGN KEY ON to OFF.
• If the Driver/Assist/Rear door lock switch is switched from unlock to lock after executing unlock, then unlock command is executed again for 5 seconds.
• Auto Door Lock function is not engaged in case of crash unlock condition.

36. Crash Door Unlock

• Unlock is executed every time ACU signal is inputted when IGN switch is turned ON. Unlock output continues for the set duration even if the vehicle mode is switched from IGN KEY ON to OFF.
• If the Driver/Assist/Rear door lock switch is switched from unlock to lock after executing unlock, then unlock command is executed again for 5 seconds.
• Auto Door Lock function is not engaged in case of crash unlock condition.

37. FOLD / UNFOLD

• Fold/Unfold is engaged when Fold/Unfold switch is activated.
• If Auto switch is activated, then Fold/Unfold is engaged automatically in case of any of below conditions.

1) If RKE Lock/Unlock.

2) If Passive Lock/Unlock.

3) If Smart Key approach/away signal is detected.

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