FRONT BODY CONTROL MODULE (FBCM) INSPECTION
- Remove the fuse box cover. (See «RELAY AND FUSE BLOCK REMOVAL/INSTALLATION»(ref-615398-S32369581092014051000000) ).
- Remove the front body control module (FBCM) from the fuse box. (See «FRONT BODY CONTROL MODULE (FBCM) REMOVAL/INSTALLATION»(ref-615428-S26487100972014051000000) ).
- Verify that the voltages of each of the terminals are as indicated in the «TERMINAL VOLTAGE TABLE (REFERENCE)»(ref-615428-S30358371632014051000000) . If the voltage is not as indicated in the table, inspect the parts under Inspection item(s). If the system does not launch normally even though inspection items are normal, specify the location of the malfunction based on the instructions from the on-board diagnostic system and the symptom troubleshooting, and perform repairs.
Front Body Control Module Terminal Voltage Chart. Scheme 54
| Terminal | Signal | Connected to | Measurement conditions | Voltage (V) | Inspection item(s) | |
|---|---|---|---|---|---|---|
| 1A | Power supply | HAZARD 25 A fuse | Under any condition | B+ | HAZARD 25 A fuse Related wiring harness | |
| 1B | Power supply | HAZARD 25 A fuse | Under any condition | B+ | HAZARD 25 A fuse Related wiring harness | |
| 1C | Ignition power supply | Climate control unit A/C relay Seat warmer control unit | Ignition switched ON (engine off) | B+ | Climate control unit A/C relay Seat warmer control unit Related wiring harness | |
| Ignition switched OFF (LOCK) | 1.0 or less | |||||
| 1D | Signal ground | Body ground | Under any condition | 1.0 or less | Related wiring harness | |
| 1E | Rear turn light (RH) control | Rear turn light (RH) | Ignition switched ON (engine off) | Turn switch at right turn light position | 1.0 or less <==> B+ | Rear turn light (RH) Related wiring harness |
| Turn switch is in position other than above | 1.0 or less | |||||
| 1F | Side turn light (RH) control | Side turn light (RH) | Ignition switched ON (engine off) | Turn switch at right turn light position | 1.0 or less <==> B+ | Side turn light (RH) Related wiring harness |
| Turn switch is in position other than above | 1.0 or less | |||||
| 1G | Front turn light (RH) control | Front turn light (RH) | Ignition switched ON (engine off) | Turn switch at right turn light position | 1.0 or less <==> B+ | Front turn light (RH) Related wiring harness |
| Turn switch is in position other than above | 1.0 or less | |||||
| 1H | ||||||
| 1I | License light control | TNS relay | Light switch at TNS position | B+ | TNS relay Related wiring harness | |
| Light switch at OFF position | 1.0 or less | |||||
| 1J | Parking light control | Parking light (RH, LH) | Light switch at TNS position | B+ | Parking light (RH, LH) Related wiring harness | |
| Light switch at OFF position | 1.0 or less | |||||
| 1K | ||||||
| 1L | Horn relay control | Horn relay | Horn switch not pressed | B+ | Horn relay Related wiring harness | |
| Horn switch pressed | 1.0 or less | |||||
| 1M | Headlight relay (LO) control | Headlight relay (LO) | Light switch at HEAD position | 1.0 or less | Headlight relay (LO) Related wiring harness | |
| Light switch is in position other than above | B+ | |||||
| 1N | ||||||
| 1O (1) | Theft-deterrent horn input signal | Rear body control module (RBCM) | Connect the M-MDS and turn on the "BG_HORN_RLY" using the rear body control module (RBCM) simulation function. | 1.0 or less | Rear body control module (RBCM) Related wiring harness | |
| Connect the M-MDS and turn off the "BG_HORN_RLY" using the rear body control module (RBCM) simulation function. | B+ | |||||
| 1P | Rear window defroster relay control | Rear window defroster relay | Ignition switched ON (engine off) | Rear window defroster switch OFF | B+ | Rear window defroster relay Related wiring harness |
| Rear window defroster switch ON | 1.0 or less | |||||
| 1Q | ||||||
| 1R (1) | Theft-deterrent horn power supply | R.WIPER 15 A fuse | Under any condition | B+ | R.WIPER 15 A fuse Related wiring harness | |
| 1S | ||||||
| 1T (1) | Theft-deterrent horn output signal | Theft-deterrent horn | M-MDS is connected and theft-deterrent is sounded using data monitor function | B+ | Theft-deterrent horn Related wiring harness | |
| M-MDS is connected and theft-deterrent is not sounded using data monitor function | 1.0 or less | |||||
| 2A | Interior light power supply | ROOM 15 A fuse | Under any condition | B+ | ROOM 15 A fuse Related wiring harness | |
| 2B | Front turn light (LH) control | Front turn light (LH) | Ignition switched ON (engine off) | Turn switch at left turn light position | 1.0 or less <==> B+ | Front turn light (LH) Related wiring harness |
| Turn switch is in position other than above | 1.0 or less | |||||
| 2C (2) | Daytime running light control | DRL relay | Ignition switched ON (engine off) and light switch OFF | Daytime running light illuminates | B+ | DRL relay Related wiring harness |
| Daytime running light turns off | 1.0 or less | |||||
| 2D | Rear turn light (LH) control | Rear turn light (LH) | Ignition switched ON (engine off) | Turn switch at left turn light position | 1.0 or less <==> B+ | Rear turn light (LH) Related wiring harness |
| Turn switch is in position other than above | 1.0 or less | |||||
| 2E | ||||||
| 2F | Side turn light (LH) control | Side turn light (LH) | Ignition switched ON (engine off) | Turn switch at left turn light position | 1.0 or less <==> B+ | Side turn light (LH) Related wiring harness |
| Turn switch is in position other than above | 1.0 or less | |||||
| 2G (3) | LIN communication | Rain sensor/auto-light sensor | Terminal used for communication therefore determination based on terminal voltage is not possible. | |||
| 2H | ||||||
| 2I | CAN_L | CAN system related module | Terminal used for communication therefore determination based on terminal voltage is not possible. | |||
| 2J | LIN communication | Climate control unit | Terminal used for communication therefore determination based on terminal voltage is not possible. | |||
| 2K | CAN_H | CAN system related module | Terminal used for communication therefore determination based on terminal voltage is not possible. | |||
| 2L | CAN_L | AFS control module | Terminal used for communication therefore determination based on terminal voltage is not possible. | |||
| 2M | Ignition power supply | C/U IG1 15 A fuse | Ignition switched ON (engine off) | B+ | C/U IG1 15 A fuse Related wiring harness | |
| Ignition switched OFF (LOCK) | 1.0 or less | |||||
| 2N | CAN_L | CAN system related module | Terminal used for communication therefore determination based on terminal voltage is not possible. | |||
| 2O | ||||||
| 2P | CAN_H | CAN system related module | Terminal used for communication therefore determination based on terminal voltage is not possible. | |||
| 2Q | Brake fluid level switch signal | Brake fluid level sensor | Ignition switched ON (engine off) | Brake fluid level is less than MIN (brake fluid level sensor ON) | 1.0 or less | Brake fluid level sensor Related wiring harness |
| Brake fluid level is MIN or more (brake fluid level sensor OFF) | Wave pattern (See PATTERN 1 ). | |||||
| 2R | CAN_H | CAN system related module | Terminal used for communication therefore determination based on terminal voltage is not possible. | |||
| 2S | Washer level switch signal | Washer fluid-level sensor | Ignition switched ON (engine off) | Washer level is less than MIN (washer fluid-level sensor ON) | 1.0 or less | Washer fluid-level sensor Related wiring harness |
| Washer level is MIN or more (washer fluid-level sensor OFF) | Wave pattern (See PATTERN 1 ). | |||||
| 2T | ||||||
| 2U | Ignition power supply | Start stop unit | Ignition switched ON (engine off) | B+ | Start stop unit Related wiring harness | |
| Ignition switched OFF (LOCK) | 1.0 or less | |||||
| 2V | Headlight relay (LO) control (discharge type) | Headlight relay (LO) | Light switch at HEAD position | 1.0 or less | Headlight relay (LO) Related wiring harness | |
| Light switch is in position other than above | B+ | |||||
| 2W | Headlight (LO) switch signal | Start stop unit | Light switch at HEAD position | 1.0 or less | Start stop unit Related wiring harness | |
| Light switch at OFF position | B+ | |||||
| 2X | Headlight relay (HI) control | Headlight relay (HI) | Headlight at HEAD position and dimmer switch at LO position | B+ | Headlight relay (HI) Related wiring harness | |
| Headlight at HEAD position and dimmer switch at HIGH or passing position | 1.0 or less | |||||
| 2Y | Windshield wiper (LO) switch signal | Start stop unit | Windshield wiper switch at ON position | 1.0 or less | Start stop unit Related wiring harness | |
| Windshield wiper switch at OFF position | B+ | |||||
| 2Z | Blower motor relay control | Blower relay | Ignition switched ON (engine off) | Operate blower motor using fan switch | 1.0 or less | Blower relay Related wiring harness |
| Press climate control unit OFF button to stop blower motor | B+ | |||||
| 2AA | Autostop switch signal | Windshield wiper motor | Ignition switched ON (engine off) | Turn windshield wiper switch ON and wiper is operated | B+ | Windshield wiper motor Related wiring harness |
| Windshield wiper switch OFF | 1.0 or less | |||||
| 2AB (4) | Front fog light relay control | Front fog light relay | Light switch at HEAD position | Front fog light switch OFF | B+ | Front fog light relay Related wiring harness |
| Front fog light switch ON | 1.0 or less | |||||
| 3A | Wiper power supply | WIPER 20 A fuse | Under any condition | B+ | WIPER 20 A fuse Related wiring harness | |
| 3B | Wiper power supply | WIPER 20 A fuse | Under any condition | B+ | WIPER 20 A fuse Related wiring harness | |
| 3C | Windshield wiper motor (HI) control | Windshield wiper motor | Ignition switched ON (engine off) | Windshield wiper switch at HI position | B+ | Windshield wiper motor Related wiring harness |
| Windshield wiper switch at OFF position | 1.0 or less | |||||
| 3D | Power ground | Body ground | Under any condition | 1.0 or less | Related wiring harness | |
| 3E | Windshield wiper motor (HI) control | Windshield wiper motor | Ignition switched ON (engine off) | Windshield wiper switch at HI position | B+ | Windshield wiper motor Related wiring harness |
| Windshield wiper switch at OFF position | 1.0 or less | |||||
| 3F | Windshield washer motor control | Washer motor | Ignition switched ON (engine off) | Windshield washer switch ON | B+ | Washer motor Related wiring harness |
| Windshield washer switch OFF | 1.0 or less | |||||
| 3G | Windshield wiper motor (LOW) control | Windshield wiper motor | Ignition switched ON (engine off) | Windshield wiper switch at LOW position | B+ | Windshield wiper motor Related wiring harness |
| Windshield wiper switch at OFF position | 1.0 or less | |||||
| 3H | Rear window washer motor control | Washer motor | Ignition switched ON (engine off) | Rear window washer switch ON | B+ | Washer motor Related wiring harness |
| Rear washer switch OFF | 1.0 or less | |||||
| 3I | Windshield wiper motor (LOW) control | Windshield wiper motor | Ignition switched ON (engine off) | Windshield wiper switch at LOW position | B+ | Windshield wiper motor Related wiring harness |
| Windshield wiper switch at OFF position | 1.0 or less | |||||
| 3J | Interior illumination power supply | Selector illumination Climate control unit (vehicles with manual air conditioner system) Audio unit Clock spring | Light switch at TNS position | B+ | Selector illumination Climate control unit (vehicles with manual air conditioner) Audio unit Clock spring Related wiring harness | |
| Light switch at OFF position | ___ (5) | |||||
| 3K | Power supply | HAZARD 25 A fuse | Under any condition | B+ | HAZARD 25 A fuse Related wiring harness | |
| 3L | Power supply | HAZARD 25 A fuse | Under any condition | B+ | HAZARD 25 A fuse Related wiring harness | |
| (1) Vehicles with theft-deterrent system (2) Vehicles with DRL system (3) Vehicles with auto wiper system (4) Vehicles with front fog light system (5) The measured voltage changes according to the tester specification, therefore determination based on terminal voltage is not possible. | ||||||
| (1) | Vehicles with theft-deterrent system |
| (2) | Vehicles with DRL system |
| (3) | Vehicles with auto wiper system |
| (4) | Vehicles with front fog light system |
| (5) | The measured voltage changes according to the tester specification, therefore determination based on terminal voltage is not possible. |
Scheme 55
- Terminal: Brake fluid level signal: 2Q (+) <==> ground (-) Washer level signal: 2S (+) <==> ground (-)
- Oscilloscope setting: 2 V/DIV (Y), 1 ms/DIV (X), DC range (Scheme 55): Brake And Washer Fluid Level Signal Voltage Waveform
REAR BODY CONTROL MODULE (RBCM) INSPECTION
- Disconnect the negative battery cable. (See «NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0]»(ref-615412-S04991947062014051000000) ).
- Remove the following parts: Trunk board (See «TRUNK BOARD REMOVAL/INSTALLATION»(ref-615455-S29131302172014051000000) ). Trunk end trim (See «TRUNK END TRIM REMOVAL/INSTALLATION»(ref-615455-S40973116952014051000000) ). Rear scuff plate (LH) (See «REAR SCUFF PLATE REMOVAL/INSTALLATION»(ref-615455-S30956965972014051000000) ). Trunk side trim (LH) (See «TRUNK SIDE TRIM REMOVAL/INSTALLATION»(ref-615455-S22359050062014051000000) ).
- Remove the rear body control module (RBCM) from the body with the connector connected. (See «REAR BODY CONTROL MODULE (RBCM) REMOVAL/INSTALLATION»(ref-615428-S18318289172014051000000) ).
- Connect the negative battery cable. (See «NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0]»(ref-615412-S04991947062014051000000) ).
- Verify that the voltages of each of the terminals are as indicated in the «TERMINAL VOLTAGE TABLE (REFERENCE)»(ref-615428-S02026829992014051000000) . If the voltage is not as indicated in the table, inspect the parts under Inspection item(s). If the system does not launch normally even though inspection items are normal, specify the location of the malfunction based on the instructions from the on-board diagnostic system and the symptom troubleshooting, and perform repairs.
Identifying Rear Body Control Module Connectors. Scheme 56
| Terminal | Signal | Connected to | Measurement conditions | Voltage (V) | Inspection item(s) | |
|---|---|---|---|---|---|---|
| 1A | ||||||
| 1B | Interior light ground | Map light Vanity mirror illumination | Under any condition | 1.0 or less | Map light Vanity mirror illumination Related wiring harness | |
| 1C | ||||||
| 1D | ||||||
| 1E | Interior light control | Map light | Under any condition | 1.0 or less | Map light Related wiring harness | |
| 1F | ||||||
| 1G | ||||||
| 1H | Interior light power supply | Map light | Under any condition | B+ | Map light Related wiring harness | |
| 2A | ||||||
| 2B | Power supply | D.LOCK 25 A fuse | Under any condition | B+ | D.LOCK 25 A fuse Related wiring harness | |
| 2C | Door lock control | Door lock actuator | Lock driver-side door lock switch from unlock | 1.0 or less --> B+ --> 1.0 or less | Door lock actuator Related wiring harness | |
| Unlock driver-side door lock switch from lock | 1.0 or less | |||||
| 2D | ||||||
| 2E | Door unlock control | Door lock actuator | Unlock driver-side door lock switch from lock | 1.0 or less --> B+ --> 1.0 or less | Door lock actuator Related wiring harness | |
| Lock driver-side door lock switch from unlock | 1.0 or less | |||||
| 2F (1) | Theft-deterrent horn relay control | Front body control module (FBCM) | Connected to M-MDS and using data monitor function, theft-deterrent sound activates | 1.0 or less | Front body control module (FBCM) Related wiring harness | |
| Connected to M-MDS and using data monitor function, theft-deterrent sound does not activate | B+ | |||||
| 2G (2) | 2-stage unlock system control | Door lock actuator | Press transmitter unlock button two times (2-stage unlock system operation condition) | B+ --> 1.0 or less | Door lock actuator Related wiring harness | |
| Except above | 1.0 or less | |||||
| 2H | ||||||
| 2I | Ignition power supply | METER 1 10 A fuse | Ignition switched ON (engine off) | B+ | METER 1 10 A fuse Related wiring harness | |
| Ignition switched OFF (LOCK) | 1.0 or less | |||||
| 2J | ||||||
| 2K | ||||||
| 2L | ||||||
| 2M | Power supply | R.WIPER 15 A fuse | Under any condition | B+ | R.WIPER 15 A fuse Related wiring harness | |
| 2N | ||||||
| 2O | ||||||
| 2P | Power supply | ROOM 15 A fuse | Under any condition | B+ | ROOM 15 A fuse Related wiring harness | |
| 3A | ||||||
| 3B | Serial communication | Start stop unit | Terminal used for communication therefore determination based on terminal voltage is not possible. | |||
| 3C | Fuel sensor ground | Fuel gauge sender unit | Under any condition | 1.0 or less | Fuel gauge sender unit Related wiring harness | |
| 3D | Serial communication | Power window main switch | Terminal used for communication therefore determination based on terminal voltage is not possible. | |||
| 3E | ||||||
| 3F | Door lock switch signal | Door lock switch | Door lock switch unlocked | 1.0 or less | Door lock switch Related wiring harness | |
| Other | 4.5 | |||||
| Door lock switch locked | 2.2 | |||||
| 3G | ||||||
| 3H | Driver-side door key cylinder switch signal | Door key cylinder switch | Door key cylinder is turned to unlock side | 1.0 or less | Door key cylinder switch Related wiring harness | |
| Other | 4.5 | |||||
| Door key cylinder is turned to lock side | 2.2 | |||||
| 3I | Fuel sensor signal | Fuel gauge sender unit | Inspect the fuel gauge sender unit and related wiring harnesses because the terminal voltage at this terminal cannot be examined. (See FUEL GAUGE SENDER UNIT INSPECTION [2WD] ). (See FUEL GAUGE SENDER UNIT INSPECTION [AWD] ). | |||
| 3J | Lock input (lock-link switch (passenger's side, rear door)) | Door lock-link switch | The passenger-side and rear doors are all locked | 4.6 | Door lock-link switch Related wiring harness | |
| Among the passenger-side and rear doors, at least one door is unlocked | 1.0 or less | |||||
| 3K (3) | Fuel sensor signal (sub) | Fuel gauge sender unit (sub) | Inspect the fuel gauge sender unit and related wiring harnesses because the terminal voltage at this terminal cannot be examined. (See FUEL GAUGE SENDER UNIT INSPECTION [AWD] ). | |||
| 3L | Bonnet latch switch signal | Hood latch switch | Hood open (bonnet latch switch OFF) | 4.6 | Hood latch switch Related wiring harness | |
| Hood is closed (bonnet latch switch ON) | 1.0 or less | |||||
| 3M | Unlock input (front door lock-link switch (driver's door)) | Door lock-link switch (driver's door) | Driver's door locked | 4.6 | Door lock-link switch (driver's door) Related wiring harness | |
| Driver's door unlocked | 1.0 or less | |||||
| 3N | ||||||
| 3O | Lock input (front door lock-link switch (driver's door)) | Door lock-link switch (driver's door) | Driver's door locked | 1.0 or less | Door lock-link switch (driver's door) Related wiring harness | |
| Driver's door unlocked | 4.6 | |||||
| 3P | ||||||
| 3Q | Rear door switch (RH) signal | Rear door switch (RH) | Rear door (RH) open | 1.0 or less | Rear door switch (RH) Related wiring harness | |
| Rear door (RH) closed | B+ | |||||
| 3R | ||||||
| 3S | Rear door switch (LH) signal | Rear door switch (LH) | Rear door (LH) open | 1.0 or less | Rear door switch (LH) Related wiring harness | |
| Rear door (LH) closed | B+ | |||||
| 3T | ||||||
| 3U | Front door switch (passenger's door) signal | Front door switch (passenger's door) | Front door (passenger's door) open | 1.0 or less | Front door switch (passenger's door) Related wiring harness | |
| Front door (passenger's door) closed | B+ | |||||
| 3V | ||||||
| 3W | Front door switch (driver's door) signal | Front door switch (driver's door) | Front door (driver's door) open | 1.0 or less | Front door switch (driver's door) Related wiring harness | |
| Front door (driver's door) closed | B+ | |||||
| 3X | ||||||
| 4A | Rear window wiper motor power supply | Rear wiper motor | Ignition switched ON (engine off) | B+ | Rear wiper motor Related wiring harness | |
| Ignition switched OFF (LOCK) | 1.0 or less | |||||
| 4B | Power ground | Body ground | Under any condition | 1.0 or less | Related wiring harness | |
| 4C | Liftgate lock actuator control | Liftgate lock actuator | Press liftgate opener switch | B+ --> 1.0 or less | Liftgate lock actuator Related wiring harness | |
| Except above | 1.0 or less | |||||
| 4D | Brake light control | Brake light High-mount brake light | Brake pedal depressed | B+ | Brake light High-mount brake light Related wiring harness | |
| Brake pedal not depressed | 1.0 or less | |||||
| 4E | ||||||
| 4F | Cargo compartment light power supply | Cargo compartment light | Under any condition | B+ | Cargo compartment light Related wiring harness | |
| 4G | CAN_H | CAN system related module | Terminal used for communication therefore determination based on terminal voltage is not possible. | |||
| 4H | ||||||
| 4I | CAN_H | CAN system related module | Terminal used for communication therefore determination based on terminal voltage is not possible. | |||
| 4J | CAN_L | CAN system related module | Terminal used for communication therefore determination based on terminal voltage is not possible. | |||
| 4K | Liftgate latch switch signal | Cargo compartment light switch | Liftgate open | 1.0 or less | Cargo compartment light switch Related wiring harness | |
| Liftgate closed | B+ | |||||
| 4L | CAN_L | CAN system related module | Terminal used for communication therefore determination based on terminal voltage is not possible. | |||
| 4M | Liftgate opener switch signal | Liftgate opener switch | Liftgate opener switch pressed | 1.0 or less | Liftgate opener switch Related wiring harness | |
| Liftgate opener switch not pressed | 4.5 | |||||
| 4N | ||||||
| 4O | ||||||
| 4P | Cargo compartment light control | Cargo compartment light | Cargo compartment light switched ON | Liftgate open | 1.0 or less | Cargo compartment light Related wiring harness |
| Liftgate closed | B+ | |||||
| 4Q | ||||||
| 4R | Signal ground | Body ground | Under any condition | 1.0 or less | Related wiring harness | |
| 4S | Back-up light control | Back-up light (LH, RH) Auto dimming mirror | Ignition switched ON (engine off) | Selector lever at R position (AT vehicle) Shift lever at R position (MT vehicle) | B+ | Back-up light (LH, RH) Auto dimming mirror Related wiring harness |
| Other | 1.0 or less | |||||
| 4T | Rear wiper motor control (LO) | Rear wiper motor | Rear wiper switch at ON | 1.0 or less | Rear wiper motor Related wiring harness | |
| Rear wiper switch at OFF | B+ | |||||
| (1) Vehicles with theft-deterrent system (2) Vehicles with 2-stage unlock system (3) AWD vehicles | ||||||
| (1) | Vehicles with theft-deterrent system |
| (2) | Vehicles with 2-stage unlock system |
| (3) | AWD vehicles |