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Contents Section: Communication Devices All sections

Body Control System: Diagnosis Mazda 2 II рестайлинг

Communication Devices 17 illustrations ~750 words

BODY CONTROL MODULE (BCM) INSPECTION

  1. Remove the dashboard under cover. (See «DASHBOARD UNDER COVER REMOVAL/INSTALLATION»(ref-517497-S06456173492012121200000) .)
  2. Remove the glove compartment. (See «GLOVE COMPARTMENT REMOVAL/INSTALLATION»(ref-517497-S18570108062012121200000) .)
  3. Measure the voltage at each terminal and inspect for the continuity between the terminals and ground is as indicated in the Terminal Voltage Tables (Reference). If the voltage or continuity is not as specified in the Terminal Voltage Table (Reference), inspect the parts under "Inspection item (s)". If the system does not work properly even though the parts or related wiring harnesses do not have any malfunction, replace the BCM.

Identifying BCM Connectors Terminals. Scheme 35

Scheme 35: Identifying BCM Connectors Terminals
Scheme 35: Identifying BCM Connectors Terminals
TerminalSignalConnected toMeasurement conditionVoltage (V)Inspection item (s)
1AWindshield wiper signalWindshield wiper motorIgnition switch at ONB+Windshield wiper motor Related wiring harness
Ignition switch at off1.0 or less
1BWindshield wiper (HI) signalWindshield wiper motorIgnition switch at ONWindshield wiper operating at HIB+Windshield wiper motor Related wiring harness
OFF1.0 or less
1CRear window defroster power supplyR.DEF 20 A fuseUnder any conditionB+R.DEF 20A fuse Related wiring harness
1DWindshield wiper (Lo) signalWindshield wiper motorIgnition switch at ONWindshield wiper operating at LoB+Windshield wiper motor Related wiring harness
OFF1.0 or less
1ETNS power supplyTAIL 15 A fuseUnder any conditionB+TAIL 15A fuse Related wiring harness
1FWindshield wiper auto stop signalWindshield wiper motorIgnition switch at ONWindshield wiper operatingB+Windshield wiper motor Related wiring harness
Windshield wiper not operating1.0 or less
1GFront TNS inhibitedParking lightTNS ONB+Parking light Related wiring harness
TNS OFF1.0 or less
1HWindshield washer motor controlWasher motorIgnition switch at ONWindshield washer motor operatingB+Washer motor Related wiring harness
Windshield washer motor not operating1.0 or less
1IHazard power supplyHAZARD 10A fuseUnder any conditionB+HAZARD 10A fuse Related wiring harness
1JRear window washer motor controlWasher motorIgnition switch at ONRear washer motor operatingB+Washer motor Related wiring harness
Rear washer motor not operating1.0 or less
1KFront turn light (RH) controlFront turn light (RH) Front side turn light (RH)Turn switch (RH) onFront turn light (RH) flashesAlternates between 1.0 or less and B+Front turn light (RH) Front side turn light (RH) Related wiring harness
Hazard warning switch on
Front turn light (RH) not illuminated1.0 or less
1LFront turn light (LH) controlFront turn light (LH) Front side turn light (LH)Turn switch (LH) onFront turn light (LH) flashesAlternates between 1.0 or less and B+Front turn light (LH) Front side turn light (LH) Related wiring harness
Hazard warning switch on
Front turn light (LH) not illuminated1.0 or less
1M
1NGround signalBody groundUnder any condition1.0 or lessRelated wiring harness
1OInterior light power supplyROOM 15 A fuseUnder any conditionB+ROOM 15 A fuse Related wiring harness
1PDoor lock power supplyD/L 20 A fuseUnder any conditionB+D/L 20 A fuse Related wiring harness
2A
2B
2CDaytime running light control signal (RH)Head light (RH)Under any condition1.0 or lessRelated wiring harness
2DGround signalBody groundUnder any condition1.0 or lessRelated wiring harness
2EDaytime running light control signal (LH)Head light (LH)Under any condition1.0 or lessRelated wiring harness
2FRear window wiper power supply (IG 2)R.WIP 10 A fuse Ignition switchIgnition switch at ONB+R.WIP 10 A fuse Ignition switch Related wiring harness
Ignition switch at off1.0 or less
2GMeter power supply (IG 1)METER 10 A fuse Ignition switchIgnition switch at ONB+METER 10A fuse Ignition switch Related wiring harness
Ignition switch is off1.0 or less
2HWindshield washer switch signalWiper and washer switchIgnition switch at ONWindshield washer switch on1.0 or lessWiper and washer switch Related wiring harness
Windshield washer switch offB+
2I
2J
2KHorn controlHorn relayHorn sounded1.0 or lessHorn relay Related wiring harness
Horn not soundedB+
2LRear window washer switch signalWiper and washer switchIgnition switch at ONRear window washer switch on1.0 or lessWiper and washer switch Related wiring harness
Rear window washer switch offB+
2MSignal groundBody groundUnder any condition1.0 or lessRelated wiring harness
2NWindshield wiper power supply (IG 2)F.WIP 20 A fuse Ignition switchIgnition switch at ONB+F.WIP 20A fuse Ignition switch Related wiring harness
Ignition switch at off1.0 or less
2OIllumination outputILLUMI 7.5 A fuse Illumination lightTNS ONB+ILLUMI 7.5 A fuse Illumination light Related wiring harness
TNS OFF1.0 or less
2P
3ARear window defroster outputFilament M.DEF 7.5 A fuseIgnition switch at ONRear window defroster onB+Filament M.DEF 7.5 A fuse Related wiring harness
Rear window defroster off1.0 or less
3B
3CLiftgate opener actuator power supplyLiftgate latch and lock actuatorLiftgate opener switch pressed, lock release operationB+Liftgate latch and lock actuator Related wiring harness
Other1.0 or less
3DRear window wiper power supplyRear wiper motorIgnition switch at ONB+Rear wiper motor Related wiring harness
Ignition switch is off1.0 or less
3EDoor lock controlDoor lock actuators (passenger side, RH, LH)Door lock actuators 2-step unlockingWave pattern (See DOOR LOCK ACTUATORS 2-STEP UNLOCKING (REFERENCE) .)Door lock actuators (passenger side, RH, LH) Related wiring harness
Other1.0 or less
3FRear window wiper controlRear wiper motorIgnition switch at ONRear wiper activated1.0 or lessRear motor Related wiring harness
Rear wiper not activatedB+
3G
3HRear TNS light signalTail light License plate lightTNS ONB+Tail light License plate light Related wiring harness
TNS OFF1.0 or less
3IInterior light controlInterior lightInterior light on by opening any doorInterior light off by closing all doorsWave pattern (See PATTERN 7 .)Interior light Related wiring harness
3JRear turn light (RH) controlRear turn light (RH)Turn switch (RH) onRear turn light (RH) flashesAlternates between 1.0 or less and B+Rear turn light (RH) Related wiring harness
Hazard warning switch on
Rear turn light (RH) not illuminated1.0 or less
3K
3LRear turn light (LH) controlRear turn light (LH)Turn switch (LH) onRear turn light (LH) flashesAlternates between 1.0 or less and B+Rear turn light (LH) Related wiring harness
Hazard warning switch on
Rear turn light (LH) not illuminated1.0 or less
3MDoor lock controlDoor lock actuatorsDoor lock actuator lockingB+Door lock actuator Related wiring harness
Other1.0 or less
3N
3ODoor unlock controlDoor lock actuator (Driver's side)Door lock actuator unlockingB+Door lock actuator Related wiring harness
Other1.0 or less
3P
4ABrake fluid level signalBrake fluid level sensorIgnition switch at ONBrake fluid level less than MIN1.0 or lessBrake fluid level sensor Related wiring harness
Brake fluid level above MIN.5
4BOil pressure switch signalOil pressure switchEngine runningB+Oil pressure switch Related wiring harness
Engine not running1.0 or less
4C
4D
4E
4F
4G
4H
4IFront fog light controlFront fog light relayHeadlight low-beam illuminatedFront fog light switch ON1.0 or lessFront fog light relay Related wiring harness
Front fog light switch OFFB+
4J
4K
4L
4MHeadlight low controlHeadlight relay (LO)Headlights on1.0 or lessHeadlight relay (LO) Related wiring harness
Headlights offB+
4N
4OHeadlight high controlHeadlight relay (HI)Light switch at HEAD positionLight switch at HI or PASS position1.0 or lessHeadlight relay (HI) Related wiring harness
Light switch at LO positionB+
4P
4Q
4R
4S
4T
4U
4V
4W
4X
6ATurn switch input (RH)Turn switchTurn switch at RH position1.0 or lessTurn switch Related wiring harness
Turn switch at off positionWave pattern (See PATTERN 1 .)
6BTurn switch input (LH)Turn switchTurn switch at LH position1.0 or lessTurn switch Related wiring harness
Turn switch at off positionWave pattern (See PATTERN 1 .)
6CRear wiper switch input (ON)Wiper and washer switchRear wiper at on position1.0 or lessWiper and washer switch Related wiring harness
Rear wiper at off positionWave pattern (See PATTERN 1 .)
6DRear window defroster switch inputClimate control unit (rear window defroster switch)Rear window defroster switch pressed and held1.0 or lessClimate control unit (rear window defroster switch) Related wiring harness
Rear window defroster switch not pressedWave pattern (See PATTERN 1 .)
6EHeadlight switch input (ON)Light switchLight switch in ON position1.0 or lessLight switch Related wiring harness
Light switch not at ON positionB+
6FWindshield wiper switch input (HI)Wiper and washer switchWiper switch in HI position1.0 or lessWiper and washer switch Related wiring harness
Wiper switch not at HI positionWave pattern (See PATTERN 2 .)
6GRear window defroster indicator signalClimate control unit (rear window defroster indicator)Ignition switch at ONRear window defroster indicator illuminated1.0 or lessClimate control unit (rear window defroster indicator) Related wiring harness
Rear window defroster indicator turned offB+
6HSensitivity adjustment volume groundWiper and washer switchUnder any condition1.0 or lessWiper and washer switch Related wiring harness
6IHeadlight switch input (HI)Light switchHI beam at passing position or lights on status1.0 or lessLight switch Related wiring harness
Except aboveWave pattern (See PATTERN 2 .)
6JTNS switch signalLight switchTNS ON1.0 or lessLight switch Related wiring harness
TNS OFFB+
6KHeadlight switch input (front fog light)Light switchFront fog light switch in on position1.0 or lessLight switch Related wiring harness
Front fog light switch in off positionWave pattern (See PATTERN 2 .)
6LHeadlight switch input (vehicles with auto light/wiper system)Light switchLight switch at AUTO position1.0 or lessLight switch Related wiring harness
Light switch OFF positionWave pattern (See PATTERN 4 .)
6M
6NWindshield wiper switch input (Lo)Wiper and washer switchIgnition switch at ONWindshield wiper switch LO position1.0 or lessWiper and washer switch Related wiring harness
Windshield wiper switch off or INT positionB+
6OHeadlight switch input (LO)Light switchLight switch at LO position1.0 or lessLight switch Related wiring harness
Light switch at HI positionWave pattern (See PATTERN 2 .)
Light switch at OFF or TNS positionB+
6PSensitivity adjustment volume (Auto wiper only)Wiper and washer switchSensitivity adjustment range for auto wiper turned from + position to - positionSwitch position 1 positionWave pattern (See 1 POSITION .)Wiper and washer switch Related wiring harness
Switch position 2 positionWave pattern (See 2 POSITION .)
Switch position 3 positionWave pattern (See 3 POSITION .)
Switch position 4 positionWave pattern (See 4 POSITION .)
Switch position 5 positionWave pattern (See 5 POSITION .)
Switch position 6 position0
6QHazard warning switch signalHazard warning switchHazard warning switch on1.0 or lessHazard warning switch Related wiring harness
Hazard warning switch offWave pattern (See PATTERN 3 .)
6RKey reminder switchKey reminder switchKey insertedB+Key reminder switch Related wiring harness
Key removed1.0 or less
6SWindshield wiper switch inputWiper and washer switchIgnition switch at ONWiper switch at off positionWave pattern (See PATTERN 1 .)Wiper and washer switch Related wiring harness
Wiper switch at LO or HI positionWave pattern (See PATTERN 5 .)
Wiper switch at INT position1.0 or less
6T
6ULiftgate opener switch inputLiftgate opener switchWave pattern (See LIFTGATE OPENER SWITCH INPUT SIGNAL PULSE (REFERENCE) .)Liftgate opener switch Related wiring harness
6VCAN_LCAN system related moduleTerminal used for communication therefore determination based on terminal voltage inspection not possible.
6WSerial communicationKeyless receiver Instrument clusterTerminal used for communication therefore determination based on terminal voltage inspection not possible.
6XCAN_HCAN system related moduleTerminal used for communication therefore determination based on terminal voltage inspection not possible.
7ALiftgate opener switchLiftgate opener switchLiftgate opener switch not pressed1.0 or lessLiftgate opener switch Related wiring harness
Liftgate opener switch pressed and heldWave pattern (See LIFTGATE OPENER SWITCH SIGNAL PULSE (REFERENCE) .)
7BParking brake switch signalParking brake switchIgnition switch at ONParking brake applied1.0 or lessParking brake switch Related wiring harness
Parking brake not appliedB+
7CKey cylinder switch signalDoor key cylinder switchDriver's door key cylinder rotated to lock directionWave pattern (See PATTERN 6 .)Door key cylinder switch Related wiring harness
Driver's door key cylinder rotated to unlock direction1.0 or less
Driver's door key cylinder at neutral position after rotating in lock or unlock directionWave pattern (See PATTERN 1 .)
7D
7EAll outer door handlesPower window main switchAny door open1.0 or lessPower window main switch Related wiring harness
All doors closedB+
7F
7GRear door latch switch (LH)Rear door latch switch (LH)Rear door (LH) openWave pattern (See PATTERN 3 .)Rear door latch switch (LH) Related wiring harness
Rear door (LH) closed1.0 or less
7H
7IFront door latch switch (driver side)Front door latch switch (driver side)Front door (driver side) openWave pattern (See PATTERN 3 .)Front door latch switch (driver side) Related wiring harness
Front door (driver side) closed1.0 or less
7J
7KLock input (door lock-link switch)Door lock-link switchDriver's door locked1.0 or lessDoor lock-link switch Related wiring harness
Driver's door unlockedWave pattern (See PATTERN 3 .)
7LLock input (door lock-link switch)Front door latch and lock actuator (RH)Passenger's door lockedWave pattern (See PATTERN 3 .)Front door latch and lock actuator (RH) Related wiring harness
Passenger's door unlocked1.0 or less
7MFront door latch switch (passenger side)Front door latch switch (passenger side)Front door (passenger side) openWave pattern (See PATTERN 3 .)Front door latch switch (passenger side) Related wiring harness
Front door (passenger side) closed1.0 or less
7N
7ORear door latch switch (RH)Rear door latch switch (RH)Rear door (RH) openWave pattern (See PATTERN 3 .)Rear door latch switch (RH) Related wiring harness
Rear door (RH) closed1.0 or less
7PLock / unlock signalDoor lock switchDoor lock switch is pressed to lockWave pattern (See PATTERN 6 .)Door lock switch Related wiring harness
Door lock switch is pressed to unlock1.0 or less
OtherWave pattern (See PATTERN 1 .)
7QUnlock input (door lock-link switch)Door lock-link switchDriver's door lockedWave pattern (See PATTERN 3 .)Door lock-link switch Related wiring harness
Driver's door unlocked1.0 or less
7R
7SLiftgate switch signalLiftgate switchLiftgate opened1.0 or lessLiftgate switch Related wiring harness
Liftgate closedB+
7T
7ULIN communicationRain sensorTerminal used for communication therefore determination based on terminal voltage inspection not possible.
7VCAN_LCAN system related module DLC-2Terminal used for communication therefore determination based on terminal voltage inspection not possible.
7W
7XCAN_HCAN system related module DLC-2Terminal used for communication therefore determination based on terminal voltage inspection not possible.

Generated Pulse (Reference) - Pattern 1. Scheme 36

Scheme 36: Generated Pulse (Reference) - Pattern 1
Scheme 36: Generated Pulse (Reference) - Pattern 1
  1. Terminal: Turn switch input (RH): 6A (+) <--> body ground (-) Turn switch input (LH): 6B (+) <--> body ground (-) Rear wiper switch input (ON): 6C (+) <--> body ground (-) Rear window defroster switch input: 6D (+) <--> body ground (-) Windshield wiper switch input: 6S (+) <--> body ground (-) Key cylinder switch signal: 7C (+) <--> body ground (-) Lock / unlock signal: 7P (+) <--> body ground (-)
  2. Oscilloscope setting: 2 V/DIV (Y), 1 ms/DIV (X), DC range

Generated Pulse (Reference) - Pattern 2. Scheme 37

Scheme 37: Generated Pulse (Reference) - Pattern 2
Scheme 37: Generated Pulse (Reference) - Pattern 2
  1. Terminal: Windshield wiper switch input (HI): 6F (+) <--> body ground (-) Headlight switch input (HI): 6I (+) <--> body ground (-) Headlight switch input (front fog light): 6K (+) <--> body ground (-) Headlight switch input (LO): 6O (+) <--> body ground (-)
  2. Oscilloscope setting: 2 V/DIV (Y), 1 ms/DIV (X), DC range

Generated Pulse (Reference) - Pattern 3. Scheme 38

Scheme 38: Generated Pulse (Reference) - Pattern 3
Scheme 38: Generated Pulse (Reference) - Pattern 3
  1. Terminal: Hazard warning switch signal: 6Q (+) <--> body ground (-) Rear door latch switch (LH): 7G (+) <--> body ground (-) Front door latch switch (driver side): 7I (+) <--> body ground (-) Lock input (door lock-link switch): 7K (+) <--> body ground (-) Lock input (door lock-link switch): 7L (+) <--> body ground (-) Front door latch switch (passenger side): 7M (+) <--> body ground (-) Rear door latch switch (RH): 7O (+) <--> body ground (-) Unlock input (door lock-link switch): 7Q (+) <--> body ground (-)
  2. Oscilloscope setting: 2 V/DIV (Y), 1 ms/DIV (X), DC range

Generated Pulse (Reference) - Pattern 4. Scheme 39

Scheme 39: Generated Pulse (Reference) - Pattern 4
Scheme 39: Generated Pulse (Reference) - Pattern 4
  1. Terminal:6L (+) <--> body ground (-)
  2. Oscilloscope setting: 2 V/DIV (Y), 1 ms/DIV (X), DC range

Generated Pulse (Reference) - Pattern 5. Scheme 40

Scheme 40: Generated Pulse (Reference) - Pattern 5
Scheme 40: Generated Pulse (Reference) - Pattern 5
  1. Terminal: 6S (+) <--> body ground (-)
  2. Oscilloscope setting: 2 V/DIV (Y), 1 ms/DIV (X), DC range

Generated Pulse (Reference) - Pattern 6. Scheme 41

Scheme 41: Generated Pulse (Reference) - Pattern 6
Scheme 41: Generated Pulse (Reference) - Pattern 6
  1. Terminal: Key cylinder switch signal: 7C (+) <--> body ground (-) Lock / unlock signal: 7P (+) <--> body ground (-)
  2. Oscilloscope setting: 2 V/DIV (Y), 1 ms/DIV (X), DC range

Generated Pulse (Reference) - Pattern 7. Scheme 42

Scheme 42: Generated Pulse (Reference) - Pattern 7
Scheme 42: Generated Pulse (Reference) - Pattern 7
  1. Terminal: 3I (+) <--> body ground (-)
  2. Oscilloscope setting: 5 V/DIV (Y), 5 ms/DIV (X), DC range

Liftgate Opener Switch Input Signal Pulse (Reference) - Liftgate Opener Switch Not Pressed. Scheme 43

Scheme 43: Liftgate Opener Switch Input Signal Pulse (Reference) - Liftgate Opener Switch Not Pressed
Scheme 43: Liftgate Opener Switch Input Signal Pulse (Reference) - Liftgate Opener Switch Not Pressed
  1. Terminal: 6U (+) <--> body ground (-)
  2. Oscilloscope setting: 2 V/DIV (Y), 1 ms/DIV (X), DC range
  3. Measurement condition: Liftgate opener switch not pressed

Liftgate Opener Switch Input Signal Pulse (Reference) - Liftgate Opener Switch Pressed. Scheme 44

Scheme 44: Liftgate Opener Switch Input Signal Pulse (Reference) - Liftgate Opener Switch Pressed
Scheme 44: Liftgate Opener Switch Input Signal Pulse (Reference) - Liftgate Opener Switch Pressed
  1. Terminal: 6U (+) <--> body ground (-)
  2. Oscilloscope setting: 2 V/DIV (Y), 1 ms/DIV (X), DC range
  3. Measurement condition: Liftgate opener switch pressed

Liftgate Opener Switch Signal Pulse (Reference) Switch Pressed. Scheme 45

Scheme 45: Liftgate Opener Switch Signal Pulse (Reference) Switch Pressed
Scheme 45: Liftgate Opener Switch Signal Pulse (Reference) Switch Pressed
  1. Terminal: 7A (+) <--> body ground (-)
  2. Oscilloscope setting: 2 V/DIV (Y), 1 ms/DIV (X), DC range
  3. Measurement condition: Liftgate opener switch pressed

Door Lock Actuators 2-Step Unlocking (Reference). Scheme 46

Scheme 46: Door Lock Actuators 2-Step Unlocking (Reference)
Scheme 46: Door Lock Actuators 2-Step Unlocking (Reference)
  1. Terminal: 3E (+) <--> body ground (-)
  2. Oscilloscope setting: 2 V/DIV (Y), 2 ms/DIV (X), DC range
  3. Measurement condition: Door lock actuators 2-step unlocking

Sensitivity Adjustment Volume (Reference) - 1 Position. Scheme 47

Scheme 47: Sensitivity Adjustment Volume (Reference) - 1 Position
Scheme 47: Sensitivity Adjustment Volume (Reference) - 1 Position
  1. Terminal: 6P (+) <--> body ground (-)
  2. Oscilloscope setting: 2 V/DIV (Y), 1 ms/DIV (X), DC range

Sensitivity Adjustment Volume (Reference) - 2 Position. Scheme 48

Scheme 48: Sensitivity Adjustment Volume (Reference) - 2 Position
Scheme 48: Sensitivity Adjustment Volume (Reference) - 2 Position
  1. Terminal: 6P (+) <--> body ground (-)
  2. Oscilloscope setting: 2 V/DIV (Y), 1 ms/DIV (X), DC range

Sensitivity Adjustment Volume (Reference) - 3 Position. Scheme 49

Scheme 49: Sensitivity Adjustment Volume (Reference) - 3 Position
Scheme 49: Sensitivity Adjustment Volume (Reference) - 3 Position
  1. Terminal: 6P (+) <--> body ground (-)
  2. Oscilloscope setting: 2 V/DIV (Y), 1 ms/DIV (X), DC range

Sensitivity Adjustment Volume (Reference) - 4 Position. Scheme 50

Scheme 50: Sensitivity Adjustment Volume (Reference) - 4 Position
Scheme 50: Sensitivity Adjustment Volume (Reference) - 4 Position
  1. Terminal: 6P (+) <--> body ground (-)
  2. Oscilloscope setting: 2 V/DIV (Y), 1 ms/DIV (X), DC range

Sensitivity Adjustment Volume (Reference) - 5 Position. Scheme 51

Scheme 51: Sensitivity Adjustment Volume (Reference) - 5 Position
Scheme 51: Sensitivity Adjustment Volume (Reference) - 5 Position
  1. Terminal: 6P (+) <--> body ground (-)
  2. Oscilloscope setting: 2 V/DIV (Y), 1 ms/DIV (X), DC range

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