Hyundai Azera: Body Control Module (BCM) Description and Operation
Fifth generation HG (2011–2024) / Hyundai Azera 2011-2024 Service Manual / Body Electrical System / BCM (Body Control Module) / Body Control Module (BCM) Description and Operation
Fifth generation HG (2011–2024) / Hyundai Azera 2011-2024 Service Manual / Body Electrical System / BCM (Body Control Module) / Body Control Module (BCM) Description and Operation
| Description |
Communication network diagram
| Abbreviation | Explanation |
| C_CAN | Chassis Controller Area Network |
| B_CAN | Body Controller Area Network |
| MM_CAN | Multi media Controller Area Network |
| SMK | Smart Key ECU |
| DDM | Driver Door Module |
| ADM | Assist Door Module |
| PSM | Power Seat Module |
| SCM | Steering Column Module |
| IMS | Integrated Memory System |
| MFSW | Multi-Function Switch |
| SWRC | Steering Wheel Remote Controller |
| PCU | Power-train Control Unit |
| ECU | Engine Control Unit |
| TCU | Transmission Control Unit |
| EPB | Electronic Parking Brake |
| ABS | Anti-lock Brake System |
| VDC | Vechile Stability Control |
| SCC | Smart Cruise Control |
| DATC | Dual Automatic Temp Control |
| MDPS | Motor Driven Power Steering |
| SAS | Steering Angle Sensor |
| TPMS | Tire Pressure Monitoring System |
| ACU | Airbag Control Unit |
| AVM | Around View Monitor |
| CLUM | Cluster Module |
| HU | Head Unit |
| RRC | Rear Remote Control |
| IPM | Intelligent itegrated Platform Module |
IPM Overview
The Body Control Module (IPM-Intelligent integrated Platform
Module) supplies vehicle occupants with visual and audible information
and controls various vehicle functions.
To provide and receive information, the module is interfaced to the vehicle's CAN bus communications network.
| The IPM provides the following features : |
| • |
Door Lock Control(Send Lock/ Unlock commend via CAN) |
| • |
Burglar Alarm Control |
| • |
Decayed Room Lamp and MODE Lamp Control |
| • |
Key Hole Illumination Control |
| • |
Trunk Open Control |
| • |
Warning(Buzzer and indicator)Control |
| • |
Wiper control |
| • |
Lamp control (Tail, Head Lamp Low and High, Front fog, Room Lamp, Rear Fog lamp Control, HLLD) |
| • |
Turn/Hazard Signal Control |
| • |
Defroster |
| • |
External Buzzer and Burglar Alarm Horn control |
| • |
Panic |
| • |
Window control |
| • |
Key interlock solenoid |
| • |
Input signal sends via CAN for local functions |
| • |
Diagnostic |
Abbreviations
| Abbreviations | Description |
| IPM | Intelligent integrated Platform Module |
| SMK | Smart Key |
| DDM | Driver Door Module |
| ADM | Assistant Door Module |
| RKE | Remote Keyless Entry |
| CLU | CLUster |
| MFSW | Multi Function SWitch |
| IPS | Intelligent Power Switch |
| PSM | Power Seat Module |
| SCM | Steering Column Module |
| CAN | Controller Area Network |
| SRX | Standard Analog Receiver |
| Function |
Seat Belt Reminder (SBR - EC DRV Function)
When driver have their seat belts unfasten during driving, sound or indicator warning remind them of fastening their seat belts.
| Function | Characteristics | Name | |
| Signal Label | Spec. Designation | ||
| Input | Logic | L_DRVSeatBeltSW | Driver Side Seat Belt Switch |
| Analog | A_IGN1 | Ignition 1 Signal | |
| CAN_C Communication | VS | Vehicle Speed Signal | |
| Output | Internal | b_SBR_ECDRV_BuzzerCmd | Seat belt Warning Sound Command for SBR - EC DRV Function |
| CAN_C Communication | CF_Gway_DrvSeatBeltInd | Driver Seatbelt Indicator state | |
Seat Belt Reminder (SBR - EC DRV Function)
When passengers have their seat belts unfasten during
driving, sound or indicator warning will remind them to fastening their
seat belts.
| Function | Characteristics | Name | |
| Signal Label | Spec. Designation | ||
| Input | Logic | L_ASTSeatBeltSW | Assistant Side Seat Belt Switch |
| Analog | A_IGN1 | Ignition 1 Signal | |
| CAN_C Communication | VS | Vehicle Speed Signal | |
| Output | Internal | b_SBR_ECAST_BuzzerCmd | Seat belt Warning Sound Command for SBR - EC AST Function |
| Logic | O_ASTSeatBeltIND | Assistant Side Seat Belt Indicator | |
Key Reminder Warning(Key Operated Warning)
If driver opens the driver side door and go away from the car
during key is inserted or ACC state, a sound warning reminds a driver
that key has to be taken off or ACC state has to be changed to Off
state.
| Function | Characteristics | Name | |
| Signal Label | Spec. Designation | ||
| Input | Logic | L_ACC | Accessory Signal |
| L_DRVDRSW | Driver Door Switch status | ||
| L_IGN2 | Ignition 2 Signal | ||
| L_KeyIn | Key In signal | ||
| Analog | A_IGN1 | Ignition 1 Signal | |
| Output | CAN_C Communication | CF_Gway_KeyReminderWarning | Internal Warning Buzzer command for Key Reminder Warning |
Parking Brake Warning
If driver drives the vehicle with parking brake engaged or
not completely released, and vehicle speed exceeds the specific value of
5km/h (3MPH), a sound warning reminds the driver that parking brake has
to be released.
| Function | Characteristics | Name | |
| Signal Label | Spec. Designation | ||
| Input | Logic | L_PrkgBrakeSW | Parking Brake Switch |
| Analog | A_IGN1 | Ignition 1 Signal | |
| CAN_C Communication | VS | Vehicle Speed Signal | |
| Internal | Timer_ParkBrake | Vehicle Speed Conformation Timer for Parking Brake Warning | |
| Output | CAN_C Communication | CF_Gway_ParkingBrakeWarning | Internal Warning Buzzer command for Parking Brake Warning |
Smart key (SMK) Warning
SMK System Warnings conditions of activation are controlled
by the SMK unit. When a condition is satisfied, SMK unit sends
corresponding warning request to IPM and cluster by CAN, IPM only
operates the external buzzer. Internal Warning Buzzer or Warning
Indicator are operated by the Cluster.(refer the SMK warning
specification.)
| Function | Characteristics | Name | |
| Signal Label | Spec. Designation | ||
| Input | CAN_B Communication | C_PICWarning | SMK Warning Command for external buzzer |
| Output | Internal | b_SMK_DoorLockWarning1 | Door lock warning 1 |
| b_SMK_DoorLockWarning2 | Door lock warning 2 | ||
| b_SMK_DoorLockWarning3 | Door lock warning 3 | ||
| b_SMK_IDOutWarning | ID Out Warning | ||
| b_SMK_KeyReminder2Warning | Key reminder 2 warning | ||
| b_SMK_TrunkWarning | Trunk warning (Trunk closed with Fob inside) | ||
Alarm Horn Control
| Function | Characteristics | Name | |
| Signal Label | Spec. Designation | ||
| Input | Internal | b_BAlarmHornCmd | ALARM Horn Operation Command |
| b_PanicHornCmd | Panic Horn Command | ||
| Output | Logic | O_BAlarmHorn | Horn Output for NA Variant |
| O_Horn | General Horn Output | ||
Interior Lamp Control
| Function | Characteristics | Name | |
| Signal Label | Spec. Designation | ||
| Input | Logic | L_ASTDRSW | Assistant Door Switch Status |
| L_DRVDRSW | Driver Door Switch status | ||
| Analog | A_IGN1 | Ignition 1 Signal | |
| CAN_C Communication | DimmingLevel | Rheostat Level From CLU | |
| CAN_M Communication | HU_ReqDrUnlock | MTS Request for Unlock | |
| Internal | b_AllDoorsClose | All Doors Open/Close State | |
| b_AllDoorsLock | All Doors Lock/Unlock State | ||
| b_AnyDoorOpen | Any door open 100msec confirmation state | ||
| b_BAState | Burglar Alarm State is in ARM type state | ||
| b_KeyOnState | Key In or Fob In or Terminal On state | ||
| b_PassiveUnlockCmd | SMK Passive Unlock Command | ||
| b_PPosition | Gear Shift Lever P Position Input | ||
| b_RKEUnlockCmd | RKE Unlock Command | ||
| b_TailLampOutput | Tail Lamp Output | ||
| b_TailWelcomeCmd | Tail Lamp Welcome Output Command | ||
| Internal | b_RoomLampCmd | Room Lamp Output Command | |
| Output | Logic | O_FootLamp | Foot Lamp Output |
| O_KeyHoleIllum | Key Hole Illumination Output | ||
| O_MoodLamp | Mood Lamp Output | ||
| O_RoomLamp | Room Lamp Output | ||
Flasher Control
This IPM Flasher describes the following functions
| - |
One Touch Triple Turn Option Control Function |
| - |
Hazard Flashing Control Function |
| - |
Turn Signal Flashing Control Function |
| - |
Emergency Stop Release Flasher Function |
| - |
Flasher Output Control Function |
| - |
Flasher SCG (Short Circuit To Ground) Failure Control Function |
| Function | Characteristics | Name | |
| Signal Label | Spec. Designation | ||
| Input | Logic | L_HazardSW | Hazard Switch |
| L_IGN2 | Ignition 2 Signal | ||
| Analog | A_IGN1 | Ignition 1 Signal | |
| V_Bat | Battery Voltage | ||
| CAN_B Communication | C_TSigLHSW | Turn Left Switch CAN Signal | |
| C_TSigRHSW | Turn Right Switch CAN Signal | ||
| CAN_C Communication | CF_Clu_ATTurnSet | Request to set One Touch Triple Turn Option | |
| VS | Vehicle Speed Signal | ||
| Internal | b_ArmFlasherCmd | ARM Flasher Command | |
| b_BAlarmFlasherCmd | ALARM Flasher Operation Command | ||
| b_DisarmFlasherCmd | DISARM Flasher Command | ||
| b_ESSState | Emergency Stop Signal State | ||
| b_PanicFlasherCmd | Panic Flasher Command | ||
| b_TrunkCloseFlasherCmd | Trunk Close Flasher Command | ||
| b_TrunkOpenFlasherCmd | Trunk Open Flasher Command | ||
| Output | Internal | b_FlasherLeftActivity | Left Flasher Lamp Activity |
| b_FlasherRightActivity | Right Flasher Lamp Activity | ||
| b_HazardFaultFlasherCmd | Hazard Fault Flasher Command | ||
| b_HazardNormalFlasherCmd | Hazard Normal Flasher Command | ||
| Logic | O_TurnSigLH | Flasher Lamp Output - Left | |
| O_TurnSigRH | Flasher Lamp Output - Right | ||
| CAN_C Communication | CF_Gway_ATTurnCur | Current setting value for One Touch Triple Turn Enable /Disable | |
| CF_Gway_TSigLHOut | Turn LH Signal Lamp Out Status | ||
| CF_Gway_TSigRHOut | Turn RH Signal Lamp Out Status | ||
Power Window Control
This IPM Power Window describes the following functions
| - |
Power Window Maintained Mode Control Function |
| - |
Power Windows Enable Control Function |
| - |
Power Windows Enable Control Function |
| - |
Rear Window Power Control Function |
| - |
Rear Left/Right Manual Up/Manual Down Control Function |
| Function | Characteristics | Name | |
| Signal Label | Spec. Designation | ||
| Input | Logic | L_ASTDRSW | Assistant Door Switch Status |
| L_DRVDRSW | Driver Door Switch status | ||
| L_IGN2 | Ignition 2 Signal | ||
| Analog | A_IGN1 | Ignition 1 Signal | |
| CAN_B Communication | C_PwdwInhibit | Power Window Inhibit command from DDM | |
| C_RLPwdwMDownSWDDM | Rear Left Power Window Manual Down Indirect Switch from DDM | ||
| C_RLPwdwMUpSWDDM | Rear Left Power Window Manual Up Indirect Switch from DDM | ||
| C_RRPwdwMDownSWDDM | Rear Right Power Window Manual Down Indirect Switch from DDM | ||
| C_RRPwdwMUpSWDDM | Rear Right Power Window Manual Up Indirect Switch from DDM | ||
| Output | Logic | O_RearPwdwPwr | Rear Power Window Power State |
| O_RLPwdwDn | Rear Left Power Window Down | ||
| O_RLPwdwUp | Rear Left Power Window Up | ||
| O_RRPwdwDn | Rear Right Power Window Down | ||
| O_RRPwdwUp | Rear Right Power Window Up | ||
| CAN_B Communication | C_PwdwMain | Power Window Timer | |
Defroster Control
| Function | Characteristics | Name | |
| Signal Label | Spec. Designation | ||
| Input | Logic | L_DefrosterSW | Defroster Switch |
| Analog | A_IGN1 | Ignition 1 Signal | |
| V_Bat | Battery Voltage | ||
| CAN_C Communication | CF_Clu_AltLStatus | Engine is running | |
| Output | Logic | O_Defroster | Defroster Output |
Rear Curtain Control by Switch
| Function | Characteristics | Name | |
| Signal Label | Spec. Designation | ||
| Input | Logic | L_RearCurtainSW | Rear Curtain Auto Up/Down Switch |
| Internal | b_RearCurtainMain | Rear Curtain Operation Mode | |
| RearCurtainPosition | Current Rear Curtain Position | ||
| Output | Internal | b_RearCurtainDownSWCmd | Rear Current Down Command by Switch Input |
| b_RearCurtainUpSWCmd | Rear Current Up Command by Switch Input | ||
Rear Curtain Control by Shift Lever
| Function | Characteristics | Name | |
| Signal Label | Spec. Designation | ||
| Input | CAN_C Communication | VS | Vehicle Speed Signal |
| Internal | b_GearBoxPPosition | Gear Shift Lever P Position Input | |
| b_GearBoxRPosition | Gear Shift Lever R Position Input | ||
| b_RearCurtainMain | Rear Curtain Operation Mode | ||
| RearCurtainPosition | Current Rear Curtain Position | ||
| Output | Internal | b_RearCurtainDownAutoCmd | Rear Current Down Command by Shift Lever or Vehicle Speed Input |
| b_RearCurtainUpAutoCmd | Rear Current Up Command by Shift Lever Input | ||
Key Interlock Control
| Function | Characteristics | Name | |
| Signal Label | Spec. Designation | ||
| Input | Logic | L_ACC | Accessory Signal |
| L_KeyInterlockSW | Key Interlock Switch Input | ||
| Analog | A_IGN1 | Ignition 1 Signal | |
| Output | Logic | O_KeySOL | Key Interlock Solenoid Output |
ATM Solenoid Control
| Function | Characteristics | Name | |
| Signal Label | Spec. Designation | ||
| Input | Logic | L_BrakeSW | Brake Switch |
| Analog | A_IGN1 | Ignition 1 Signal | |
| CAN_C Communication | VS | Vehicle Speed Signal | |
| Internal | b_ForwardDriving | Shift Lever Position during Forward Driving | |
| b_GearBoxNPosition | Gear Shift Lever N Position Input | ||
| b_GearBoxPPosition | Gear Shift Lever P Position Input | ||
| Output | Logic | O_ATMSol | ATM Solenoid Output |
Front Wiper Low Speed Control
| Function | Characteristics | Name | |
| Signal Label | Spec. Designation | ||
| Input | Logic | L_IGN2 | Ignition 2 Signal |
| CAN_B Communication | C_WiperLowSW | Wiper Low Switch from MFSW | |
| Output | Internal | b_WiperLowBySwCMD | Wiper Low Speed Output command by Switch |
Front Wiper High Speed Control
| Function | Characteristics | Name | |
| Signal Label | Spec. Designation | ||
| Input | Logic | L_IGN2 | Ignition 2 Signal |
| CAN_B Communication | C_WiperHighSW | Wiper High Switch from MFSW | |
| Output | Internal | b_WiperHighBySwCMD | Wiper High Speed Output command by Switch |
Front Wiper Mist Control
| Function | Characteristics | Name | |
| Signal Label | Spec. Designation | ||
| Input | Logic | L_IGN2 | Ignition 2 Signal |
| CAN_B Communication | C_WiperMistSW | Wiper Mist Switch from MFSW | |
| Output | Internal | b_WiperLowByMistCMD | Wiper Mist Output command by Switch |
Front Washer Control
| Function | Characteristics | Name | |
| Signal Label | Spec. Designation | ||
| Input | Logic | L_IGN2 | Ignition 2 Signal |
| CAN_B Communication | C_WasherSW | Wiper Washer Switch from MFSW | |
| Output | Internal | b_WiperWasherCMD | Front Wiper Washer Control Command |
Front Wiper Intermittent Control
| Function | Characteristics | Name | |
| Signal Label | Spec. Designation | ||
| Input | Logic | L_IGN2 | Ignition 2 Signal |
| CAN_B Communication | C_WiperIntSW | Wiper Intmt Switch from MFSW | |
| C_WiperIntT | Wiper Intmt T Value from MFSW | ||
| Internal | b_WiperWasherCMD | Front Wiper Washer Control Command | |
| Output | Internal | b_WiperIntCMD | Wiper Intermittent Output Command |
Head Lamp Washer By Front Wiper Washer Control
| Function | Characteristics | Name | |
| Signal Label | Spec. Designation | ||
| Input | Logic | L_IGN2 | Ignition 2 Signal |
| CAN_B Communication | C_WasherSW | Wiper Washer Switch from MFSW | |
| Internal | b_HeadLampLowOutput | Head Lamp Low Output | |
| Output | Logic | O_HeadLampWasher | Head Lamp Washer Output |
Door Lock/unlock Control
This IPM DoorLock describes the following functions:
| - |
Auto Door Lock (Unlock) Option Control Function |
| - |
Central Door Lock Unlock Control Function |
| - |
Central Locking Unlocking by Switch Control Function |
| - |
Locking Unlocking Control by RKE Function |
| - |
Locking Unlocking Control by SMK Function |
| - |
Central Locking Unlocking by Driver Mechanical Key Control Function |
| - |
Unlocking by Crash Control Function |
| - |
Side Airbag Signal Function |
| - |
Auto Door Lock by Shift-Lever |
| - |
Auto Door Lock by Vehicle Speed |
| - |
Auto Door Unlock by Shift-Lever |
| - |
Auto Door Unlock by Driver Safety Knob state |
| - |
Auto Door Unlock by Key Off |
| - |
Key Reminder Unlock |
| - |
Key Reminder Unlock by SMK Key Reminder Unlock Function |
| Function | Characteristics | Name | |
| Signal Label | Spec. Designation | ||
| Input | Logic | L_ACC | Accessory Signal |
| L_ASTDRSW | Assistant Door Switch Status | ||
| L_DRVDRSW | Driver Door Switch status | ||
| L_IGN2 | Ignition 2 Signal | ||
| L_KeyIn | Key In signal | ||
| L_RLDRSW | Rear Left Door Switch Status | ||
| L_RLDRUnlockSW | Rear Left Door Unlock Switch | ||
| L_RRDRSW | Rear Right Door Switch Status | ||
| L_RRDRUnlockSW | Rear Right Door Unlock Switch | ||
| Analog | A_IGN1 | Ignition 1 Signal | |
| PWM | P_CrashUnlock | Crash Unlock Command | |
| CAN_B Communication | C_ASTPwdwDoorLock | Central Door Lock Switch in ADM | |
| C_ASTPwdwDoorUnlock | Central Door Unlock Switch in ADM | ||
| C_ASTUnlockState | Assist Door Unlock Switch | ||
| C_DRVCtrLockSW | Central Door Lock Switch in DDM | ||
| C_DRVCtrUnlockSW | Central Door Unlock Switch in DDM | ||
| C_DRVKeyLockSW | Driver Key Lock signal | ||
| C_DRVKeyUnlockSW | Driver Key Unlock signal | ||
| C_DRVUnlockState | Driver Door Unlock Switch | ||
| C_P_FL | Passive Access from Front Left | ||
| C_P_FR | Passive Access from Front Right | ||
| CAN_C Communication | CF_Acu_ExtOfSab | Existence of Side(or Side/Curtain) Airbag | |
| CF_Clu_AltLStatus | Engine is running | ||
| CF_Clu_DrLkSet | Request set the new Auto Door Lock Mode | ||
| CF_Clu_DrUkSet | Request to set Auto Door Unlock Mode | ||
| CF_Clu_TurnUkSet | Request to set Two Turn Unlock Mode | ||
| VS | Vehicle Speed Signal | ||
| Stub | Stub_b_DeadLockState | Dead Lock State | |
| Internal | b_AllDoorsClose | All Doors Open/Close State | |
| b_AutolockCmd | Lock request by Auto Locking(Burglar Alarm Function) | ||
| b_BAState | Burglar Alarm State is in ARM type state | ||
| b_KeyIGNOn | Key In and IGN1/2 On state | ||
| b_KeyOnState | Key In or Fob In or Terminal On state | ||
| b_PassiveLockCmd | SMK Passive Lock Command | ||
| b_PassiveRemindCmd | SMK Passive Key Reminder Unlock Command | ||
| b_PassiveUnlockCmd | SMK Passive Unlock Command | ||
| b_PPosition | Gear Shift Lever P Position Input | ||
| b_RKELockCmd | RKE Lock Command | ||
| b_RKEUnlockCmd | RKE Unlock Command | ||
| Output | Internal | b_RKEDRVUnlockCmd | RKE Driver Door Unlock command |
| Logic | O_CtrDRLock | Central Door Lock Output | |
| O_CtrDRUnlock | Central Door Unlock Output | ||
| O_DRVDRUnlock | Driver Door Unlock Output | ||
| CAN_C Communication | CF_Gway_DrLkCur | Current setting value for Auto Door Lock Mode | |
| CF_Gway_DrUkCur | Current setting value for Auto Door Unlock Mode | ||
| CF_Gway_TurnUkCur | Current setting value for Two Turn Unlock Mode | ||
Trunk Control
This IPM Trunk describes the following functions:
| - |
Trunk Release Control Function |
| - |
Trunk Status Indicator Function |
| - |
Trunk Lamp Function |
| Function | Characteristics | Name | |
| Signal Label | Spec. Designation | ||
| Input | Logic | L_ExternalTrunkSW | External Trunk Open Switch |
| L_RLDRUnlockSW | Rear Left Door Unlock Switch | ||
| L_RRDRUnlockSW | Rear Right Door Unlock Switch | ||
| L_TrunkStatus | Trunk Switch Status | ||
| CAN_B Communication | C_ASTUnlockState | Assist Door Unlock Switch | |
| C_DRVUnlockState | Driver Door Unlock Switch | ||
| C_PassiveTrunk_TG | Trunk open command by SMK | ||
| C_TrunkOpenSW | Trunk Open Switch from DDM | ||
| CAN_C Communication | VS | Vehicle Speed Signal | |
| Internal | b_BAState | Burglar Alarm State is in ARM type state | |
| b_RKETrunkCmd | RKE Trunk Command | ||
| Output | Logic | O_TrunkLamp | Trunk Lamp Output |
| O_TrunkRelease | Trunk Release Output | ||
| CAN_C Communication | CF_Gway_TrkOpnInd | Trunk opening Status | |
Body Control Module (BCM) Schematic Diagrams
BCM Connector Terminals
BCM(IPM) Input Signal SPEC
Signal NameOn/Off JudgmentInput CharacteristicsInput acquisition VBAT Threshold VoltageL_DRLOpt(NA)On : 3.2V UnderOff : 4.2V OverPull up(ON ...
Body Control Module (BCM) Repair procedures
Removal
1.
Disconnect the negative (-) battery terminal.
2.
Remove the crash pad lower panel.
(Refer to Body - "Crash Pad Lower Panel")
3.
Remove the Reinforcing panel after loosening the ...
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Positive Crankcase Ventilation (PCV) Valve Repair procedures
Removal
1.
Disconnect the vapor hose (A).
2.
Remove the PCV valve (B).
Inspection
1.
Insert a thin stick (A) into the PCV valve (B) from the threaded side to check that the plunger moves ...
Engine Cover Repair procedures
Removal and Installation
1.
Remove the engine cover (A).
•
Lift up the lower end of engine cover, then left and right alternately.
•
When installing, confirm that t ...
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