Kia Niro: Body Control Module (BCM) / Description and operation

Description

Body Control Module (BCM) function

No
Item
Description
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 solenoidenoid 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 releaserelay 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 wIndicatorow 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. (Remider)

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. (Remider)

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. (Remider)

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 haed lamp is turned ON by haed lamp switch or autolight, then the haed lamp is remained ON.

Haed lamp is turned OFF in case of any of the following conditions.

? 15 seconds after driver side door is opened > closed.

? Haed lamp or Autolight is not turned ON.

? If driver side door is remained opened for over 5 minutes.

? 20 minutes after the vehicle mode switching from IGN1 ON to IGN OFF.

? If TX lock signal is received 2 times while H/Lamp is ON.

18
Head Lamp LOW / HIGH

If Haed lamp low is turned ON with head lamp low switch ON or autolight 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
RPAS

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 with KEY IN switch removed from the cylIndicatorer and all doors are closed, then all doors lock signal is outputted, and when all door lock switch is locked, then hazard lamp is turned ON 1 time, and the vehicle enters ARM mode after expiration of ARMWAIT time (30 sec.).

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 Indcator 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
IGN KEY Reminder
This function does not activate if the vehicle speed is over 3Km/h(1.86mi/h).

If IGN KEY ON, Driver door switch open & Driver door unlock state becomes locked, all door unlock is executed for 1 second after 0.5 second delay.

IGN KEY ON, Assist door switch open & Assist door unlock state becomes locked, all door unlock is executed for 1 second after 0.5 second delay.

If Driver door switch is closed within 0.5 second from driver door unlock state switchitching UNLOCK > LOCK when the vehicle is in IGN KEY ON mode, all door unlock is executed only 1 time for 1 second.

If unlock condition is satisfied, then unlock is executed even if the condition is not maintained for 0.5 second.

36
Passive KEY Reminder

This function does not activate if the vehicle speed is over 3Km/h(1.86mi/h).

If KEY Reminder signal is received from SMK, then all door unlock command is outputted for 1 second.

If the door remains locked even if unlock command is outputted for 1 second as stated above, then unlock is attempted for up to 3 times (excluding the 1st output) (1 sec. interval: 0.5 sec. ON/OFF)

37
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.

38
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.


Communication Network Diagram

Abbreviation
Expalnation
AAF
Active Air Flap
ACU
Airbag Control Unit
AEB
Autonomous Emergency Braking
AHB
Active Hybrid Brake System
AMP
Amplifier
AVN
Head Unit (Audio / AVN)
B_CAN
Body Controller Area Network
BCM
Body Control Module
BMS
Battery Management System
BSD
Blind Spot Detection
C_CAN
Chassis Controller Area Network
CARMERA
Rear View Carmera
CLU
Cluster Module
DATC
Dual Automatic Temp Control
FPCM
Fuel Pump Control Module
HPCU
Hybrid Power Unit
IGPM
Intergrated Gateway & Power control Module
LDWS
Lane Departure Warning System
M_CAN
Multi media Controller Area Network
MDPS
Motor Driven Power Steering
P_CAN
Powertrain Controller Area Network
PAS
Parking Assist System
OCS
Occupant Classipication Sensor
SJB
Smart Junction Block
SMK
Smart Key Unit
TCM(DCT)
Double Clutch Transmission Unit
VESS
Virtual Engine Sound System

Schematic diagrams
Circuit Diagram ...

Repair procedures
Removal 1. Disconnect the negative (-) battery terminal. 2. Remove the glove box housing. (Refer to Body - "Glove Box Housing") ...

Other information:

Kia Niro (DE HEV) Owners Manual: Opening the tailgate
The tailgate is locked or unlocked when all doors are locked or unlocked with the key, transmitter, smart key or central door lock/unlock switch. Only the tailgate is unlocked if the tailgate unlock button on the transmitter or smart key is pressed for approximately 1 second. If unloc ...

Kia Niro 2017 (DE HEV) Service Manual: Vanity Lamp Repair procedures
Removal 1. Disconnect the negative (-) battery terminal. 2. Detach the vanity lamp (A) using a flat-tip screwdriver. 3. Disconnect the vanity lamp connector (A). Bulb Replacement 1. ...

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