Hyundai Tucson Quiz
Body Electrical System

Description and Operation

In this manual: Body Electrical System
General Information — 17Engine Mechanical System — 51Engine Electrical System — 26Emission Control System — 23Engine/Fuel Control System — 44Clutch System — 12MANUAL TRANSMISSION SYSTEM — 12AUTOMATIC TRANSMISSION SYSTEM — 42Four-Wheel Drive (4WD) System — 14Drive Shaft and Axle — 22Suspension System — 30Steering System — 16Restraint — 21Braking System — 47Body Work (Interior and Exterior) — 145Body Electrical System — 162Heating, Ventilation and Air Conditioning — 39
3steps
~18min
2/5difficulty
Done 0 of 3

Description

Body Control Module (BCM) Function
No. Item Description
1 Wiper Linked to Front Washer
  • If the washer switch is turned ON for 0.06~0.2 seconds with the vehicle mode in ALL2, the wiper relay is energized for 0.3 ± 0.1 seconds after the washer switch is turned on, then the wiper relay is de-energized after 0.7 ± 0.1 seconds.
  • If the washer switch is turned ON for 0.2 seconds in ALL2 vehicle mode, the wiper relay turns on 0.3 ± 0.1 seconds after the washer switch is turned on, and then the wiper relay turns off 2.5 to 3.8 seconds (wiper operates 2 to 3 times) after the washer switch is turned off.
2 BUEE linked wiper
  • If the wiper fog switch is turned ON for 0.7 seconds in ALL2 vehicle mode, the wiper relay turns on, and then turns off 0.7 seconds later.
  • If the wiper fog switch is turned ON for 0.7 seconds in ALL2 vehicle mode, the wiper relay turns on, and then turns off 0.7 seconds after the wipers are turned OFF.
3 VARIABLE INTERMITTENT WIPER
  • If the INT wiper switch is activated in ALL2 vehicle mode, the INT wiper operates intermittently (10 to 2.2 s) depending on the INT volume setting.
4 Rear Defroster Timer
  • If the defogger switch is activated in vehicle mode with the generator on, the defogger relay turns on for 20 minutes.
  • If the defogger switch is pressed again or if the generator mode is turned off while the defogger is activated, the defogger relay is deactivated.
5 ATM Shift Lock
  • If the brake switch is activated in vehicle mode with the ignition IGN1 on and the shift lever in P, the ATM solenoid is activated to release the shift lever.
6 Rear Door Release
  • The trunk opener relay activates for 0.2 ± 0.02 seconds when the trunk TX signal is received.
  • If the trunk release switch is activated when all doors are unlocked, the trunk opener relay activates for 0.2 ± 0.02 seconds. (However, the trunk release button is ignored in ARM WAIT, ARM, RE-ARM or ALARM modes.)
  • If the interior trunk release switch is activated, the trunk opener relay activates for 0.2 ± 0.02 seconds. (However, the trunk opener relay does NOT receive voltage if the vehicle speed exceeds 5 km/h or if the vehicle is in ARM WAIT, ARM, RE-ARM or ALARM mode.)
7 Power window timer
  • The power window relay activates when the vehicle mode changes to IGN ON.
  • When the vehicle mode changes from ALL ON to OFF, the power window relay activates for 30 seconds.
  • If a door is opened during the 30-second activation period of the power window relay, the relay is deactivated immediately.
  • If a door is opened and the vehicle mode changes from IGN ON to OFF, the power window relay is deactivated immediately.
8 Seat Belt Reminder
  • If the seat belt is not fastened, the indicator activates when ALL is first turned on, then deactivates when the seat belt is fastened.
  • If vehicle speed exceeds 20 km/h with the seat belt unfastened, the indicator flashes and the buzzer sounds for 100 seconds.
  • When vehicle speed exceeds 20 km/h with the seat belt unfastened, the indicator flashes and the buzzer sounds for 100 seconds. (Reminder)
  • If the seat belt is fastened or the vehicle mode is changed to ALL OFF while the buzzer is activated for 100 s, the indicator flashing stops and the buzzer is deactivated.
  • If the vehicle mode changes to IGN ON with the seat belt unfastened, and if the vehicle speed exceeds 20 km/h, the indicator activates, the indicator flashes and the buzzer sounds for 100 seconds.
9 CL OPERATION WARNING
  • If the driver's door is opened with KEY IN, the buzzer activates continuously at 1-second intervals.
  • The buzzer turns off if KEY OUT or the door is closed while the buzzer is on.
10 Courtesy Lamp
  • If a door is opened in ALL OFF vehicle mode, the dome light turns on. If the door is closed, the dome light remains on for 30 seconds and then turns off. (Dimmer 2 ± 0.2 s)
  • If the door remains open, the room lamp stays on for 20 seconds and then turns off. (Dimmer 2 ±0.2 s)
11 CL HOLE LIGHT
  • The key illumination indicator activates if a door is opened when the vehicle mode is IGN1 OFF; the key illumination indicator turns off 30 seconds after the door is closed.
  • If the vehicle mode changes to IGN 1 ON while the illumination indicator is activated, the indicator lamp turns off immediately.
  • If the vehicle mode changes to ARM WAIT while the key illumination LED is on, the indicator lamp turns off immediately.
12 REAR LAMPS AUTO OFF
  • If the rear lamp switch changes from OFF to ON, the rear lamp relay is activated.
  • If the tail lamp switch is off, the tail lamp relay is deactivated.
  • If the KEY IN switch is OFF and the rear lamp switch is ON, and the driver's door is OPEN while the KEY IN switch is activated, as well as the rear lamp switch, the rear lamp relay is deactivated. (Self OFF)
  • If the KEY IN switch is turned ON after auto off, the rear lamp relay is turned on. The rear lamp relay does not return and does not light even if the driver's door is opened and closed.
13 ESCORT LAMP
  • If the vehicle mode changes from IGN1 to IGN1 OFF and the headlamps are turned on by the headlamp switch or automatic lighting, the headlamps remain on.
  • The headlamp turns off in one of the following conditions. (1) 15 seconds after the driver's door is opened and closed. (2) Headlamps or auto lighting are not turned on. (3) If the driver's door has been open for more than 5 minutes. (4) 20 minutes after the vehicle mode is changed from IGN1 ON to ALL OFF. (5) If the lock TX signal is received 2 times while the headlamp is on.
14 HEADLAMP HIGH/LOW BEAM
  • If the low beam is turned on by the low beam switch ON or the auto lighting function, and the headlamp switch is turned on, the high beam is activated (auto return), and the headlamp high beam is turned on.
  • The high beam can only be turned off with the headlamp flash switch.
15 Headlamps
  • The high beam turns on only when the headlamp flash switch is on and the vehicle mode is IGN2 ON.
  • The switch is used to deactivate when the high beam is on.
16 Front Fog Lamp
  • If the front fog lamp is turned on while the rear lamp is on, the front fog lamps turn on.
  • If the front fog lamp switch is turned off while the fog lamps are illuminated, the lamps turn off.
  • If the low beam headlamps are turned on while the front fog lamps are on, the front fog lamps turn on.
  • If the front fog lamp switch is turned off while the fog lamps are illuminated, the lamps turn off.
17 AUTOMATIC LIGHT CONTROL
  • If the automatic lighting sensor detects the lamps-on condition, the lamp illuminates after 2.5 seconds.
  • If the sensor detects the lamps-off condition, the lighting turns off after 2.5 seconds.
  • If the sensor detects the tail lamp-on condition, only the tail lamps are on. If the sensor detects the headlamp-on condition, the tail lamps and headlamps are on.
  • In the headlamp activation state, the tail lamps and headlamps are on regardless of the ON/OFF state of the tail lamp switch.
18 DRL DAYTIME RUNNING LAMPS
  • The DRL indicator lamp illuminates when the engine is started.
  • The DRL indicator turns off if the low beam headlamps or front fog lamps are on.
19 WELCOME LAMP
  • If the vehicle mode changes to KEY OFF, all doors are closed and locked, and when the headlamp is on (headlamp switch or AUTO+night switch), RKE unlock is activated and the headlamp turns on for 15 seconds.
20 Static Bending Light (SBL)
  • The left/right static bending light (SBL) turns on and follows the steering wheel turning angle when the headlamps are on.
  • If the shift lever is in R, the indicator for the wheel steering angle turns on.
  • For domestic models, the fire does not light if the vehicle speed is below 3 km/h or when the shift lever is in the R position.
21 Tail Lamps with Link
  • When the vehicle mode changes to ACC ON, the cabin ambient light sensor is reflected.
  • If the auto light control status is in the tail lamp ON state for more than 2.5 seconds, an ON signal is sent.
  • If the auto light control status is in the tail lamp OFF state for more than 2.5 seconds, an OFF signal is sent.
22 DPAS
  • If the shift lever is moved to the R position when the vehicle mode is IGN1 ON, the buzzer is activated 0.5 seconds later.
  • The warning level is displayed on the instrument cluster, and the buzzer is activated according to the warning condition.
23 Normal Mode / ARM STANDBY / Relock
  • If the lock TX signal is received with the KEY IN switch removed from the cylinder, and if all doors are closed, all door lock signals are output, and when all door lock switches are locked, the hazard warning lamps flash once, and the vehicle enters ARM mode after the ARM WAIT time (30 sec) has elapsed.
  • If the lock TX signal is received when one of the gates, the hood or the tailgate is open, only the lock signal is output. The hazard warning lamps do not illuminate and the vehicle does not enter the armed mode.
  • If none of the doors is opened or KEY IN is not detected within 30 seconds after receiving the signal from the unlock TX, the vehicle returns to ARM mode.
24 Security Indicator Control
  • If the vehicle is in the SECURITY WAIT state with the KEY OFF, the indicator remains on. The indicator blinks at intervals if the vehicle is in a mode other than HOLD ARM. (Blinking interval: 2 s OFF, 0.3 s ON)
25 Alarm Status
  • If an alarm activation state is detected, the immobilizer is activated to prevent engine start and the alarm is activated.
26 Alarm Disarm / DISARM Condition
  • If the TX LOCK/UNLOCK switch signal is received, the lock/unlock signal is output for 0.5 seconds and the IMMOBILIZER is deactivated.
  • If the KEY IN switch = ON, the ALL1 switch = ON, the IGN2 switch = ON, and the generator = ON are held for 30 seconds, the IMMOBILIZER is deactivated and the vehicle mode changes to DISARM.
27 Re-close
  • If the battery is disconnected while the alarm is armed, the alarm is activated again after reconnection.
  • If the battery is disconnected while the vehicle is in ARM mode and then reconnected, the vehicle maintains the ARM mode.
28 CENTRAL LOCKING/UNLOCKING OF DOORS
  • If the KEY lock/unlock switch on the driver or passenger door is operated within 3 seconds, the lock/unlock signal for all doors is emitted for 0.5 seconds.
  • If the lock/unlock TX signal is received, the all-door lock/unlock signal is output for 0.5 seconds.
  • If the driver door lock switch (power window) is locked/unlocked, the lock/unlock signal for all doors is emitted for 0.5 seconds.
29 WITH AUTO LOCK
  • If the vehicle is in IGN1 ON mode and the generator is activated, and the vehicle speed exceeds 15 km/h, all doors are locked after 1.5 seconds. (However, if all doors are already locked or if any door is faulty, the locking of all doors is not performed.)
  • If one of the doors is unlocked after locking through the above condition, the lock command is executed 3 times (at 1 s intervals). A door that remains unlocked after the 3rd attempt is ignored.
  • The automatic door lock function is not activated in the case of collision unlocking.
30 AUTO UNLOCK DOOR
  • If KEY OFF follows KEY IN, all doors are unlocked. (However, if all doors are already open, the unlock command is not executed.)
31 Synchronized Automatic Door Unlocking with the Driver Door Unlock Switch
  • If all doors are closed and the driver door unlock switch changes from locked to unlocked, the unlock signal for all doors is output once for 0.25 seconds.
32 KEY IN REMINDER This function is not activated if the vehicle speed is above 3 km/h.
  • If the IGNITION KEY is ON, the driver door switch = OPEN, and if the driver door unlock state is locked, unlocking of all doors is performed for 1 second after a 0.5-second delay.
  • If the IGNITION KEY is ON, the passenger door switch = OPEN, and if the passenger door unlock state is locked, unlocking of all doors is performed for 1 second after a 0.5-second delay.
  • If the driver door switch is closed within 0.5 seconds after the driver door unlock state changes UNLOCK → LOCK while the vehicle is in START KEY ON mode, unlocking of all doors is performed only once for 1 second.
  • If the unlock condition is met, the unlock is executed even if the condition is not maintained for 0.5 seconds.
33 PASSIVE KEY REMINDER
  • This function is not activated if the vehicle speed is above 3 km/h.
  • If the CLE recall signal is received from the SMK, the command to unlock all doors is emitted for 1 second.
  • If the door remains locked even though the unlock command is output for 1 second as described above, unlocking is attempted a maximum of 3 times (excluding the 1st output) (1 s interval: 0.5 s ON / OFF).
34 DOOR UNLOCK IN COLLISION
  • Unlocking is performed each time the ACU signal is input while the ALL switch is on. As a result, unlocking continues for the set time, even if the vehicle mode changes from KEY ON to OFF.
  • If the driver, passenger or rear door lock switch changes from unlocked to locked after unlocking is performed, the unlock command is executed again for 5 seconds.
  • The automatic door lock function is not activated in the case of collision unlocking.
36 PULL-IN/FOLDING
  • STRING/FOLDING is turned on when the STRING/FOLDING switch is activated.
  • If the AUTO switch is activated, the SEQUENTIAL/FOLD function is automatically engaged in one of the states listed below.
  1. If RKE LOCK/UNLOCK.
  2. If PASSIVE LOCK/UNLOCK.
  3. If the smart key approach/leave signal is detected.

Communication Network Diagram
ABBREVIATIONS Description
ACU Airbag Control Unit
ABS Anti-Lock Braking System (ABS)
AEB Autonomous Emergency Braking
AFLS Adaptive Front Lighting System
Amperes Booster
AVN Headlamp Unit (Audio/AVN)
B_CAN Body Controller Network
BCM Body Control Module
BSD Blind-Spot Detection System
C_CAN Chassis Controller Area Network
EMB Instrument Cluster Module
CAMERA Rearview Camera
DATC Temporary Command. Dual Automatic
ESC Electronic Stability Program
EPB Electronic Parking Brake (EPB)
Emergency Call Engine Control System
FUEL PUMP Fuel pump
LDWS Lane Departure Warning System
M_CAN Media Controller Zone Network
DBDM Motor Driven Power Steering
P_CAN Power Train Controller Area Network
PTG POWER LIFTGATE
SJB Smart Junction Block
SMK Smart Key
SPAS Intelligent Parking Assist System
UCT Transmission Control Unit
TMU Telematics System
4WD All-Wheel Drive System

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