Contents Wiring diagrams Section: Communication Devices All sections

Control System -- Communication Mazda 5 I facelift

Communication Devices 3 illustrations ~136 words

Scheme 30

Scheme 30: CONTROL SYSTEM LOCATION INDEX

Scheme 31

Scheme 31: BODY CONTROL MODULE (BCM) REMOVAL/INSTALLATION
  1. Remove the battery cover. (See «BATTERY REMOVAL/INSTALLATION [L3]»(ref-292887-S30644836642008080600000) .)
  2. Disconnect the negative battery cable.
  3. Remove the passenger-side under cover.
  4. Remove in the order indicated in the table.
  5. Install in the reverse order of removal.

BODY CONTROL MODULE (BCM) INSPECTION

  1. Remove the glove compartment.
  2. Remove the BCM with the connector connected.
  3. Measure the voltage at each terminal and inspect that 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.

Scheme 32

Scheme 32: Terminal Voltage Table (Reference)
TerminalSignalConnected toMeasurement conditionVoltage (V)/ContinuityInspection item (s)
1AHood latch switch signalHood latch switchHood open (Hood latch switch off)5Hood latch switch Related wiring harnesses
Hood closed (Hood latch switch on)1.0 or less
1BTail light power supplyTNS relayLight switch at TNS positionB+TNS relay Related wiring harnesses
Light switch at OFF position1.0 or less
1C
1D
1ERear window defroster relay controlRear window defroster relayIgnition switch at ONRear window defroster switch on1.0 or lessRear window defroster relay Related wiring harnesses
Rear window defroster switch off5
1FPower supplyA/C relayIgnition switch at ONB+A/C relay Related wiring harnesses
Ignition switch off1.0 or less
1GBrake fluid level signalBrake fluid level sensorIgnition switch at ONBrake fluid level below MIN.B+Brake fluid level sensor Related wiring harnesses
Brake fluid level above MIN.1.0 or less
1HFront fog light relay controlFront fog light relayFront fog light switch on and light switch at TNS position1.0 or lessFront fog light relay Related wiring harnesses
Front fog light switch offB+
11
1JTNS relay controlTNS relayLight switch at TNS position1.0 or lessTNS relay Related wiring harnesses
Light switch at OFF positionB+
1K
1LHeadlight LO relay controlHeadlight LO relayLight switch at headlight position1.0 or lessHeadlight LO relay Related wiring harnesses
Light switch offB+
1M
1NHeadlight HI relay controlHeadlight HI relayIgnition switch offLight switch at high position or flash-to-pass1.0 or lessHeadlight HI relay Related wiring harnesses
OtherB+
10IG1TR switch AT main relayIgnition switch at ONB+Related wiring harnesses
Ignition switch off1.0 or less
1P
2APower supplyMain fuse blockUnder any conditionB+Related wiring harnesses
2BTurn light power supplyMain fuse blockUnder any conditionB+Related wiring harnesses
2C (1)Headlight (LH) controlHeadlight (LH) (low beam)Light switch at headlight position1.0 or lessHeadlight (LH) (low beam) Headlight LO relay Related wiring harnesses
Light switch off1.0 or less
Ignition switch ON, light switch off and parking brake releasedApprox. 3.6
2DFront 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 harnesses
Hazard warning switch on
Other1.0 or less
2E (1)Headlight (RH) controlHeadlight (RH) (low beam)Light switch at headlight position1.0 or lessHeadlight (RH) (low beam) Headlight LO relay Related wiring harnesses
Light switch off1.0 or less
Ignition switch ON, light switch off and parking brake releasedApprox. 3.6
2FFront 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 harnesses
Hazard warning switch on
Other1.0 or less
2GInterior illumination power supplyTNS relayLight switch at TNS positionB+TNS relay Related wiring harnesses
Light switch at OFF position1.0 or less
2HRear washer motor controlRear washer motorIgnition switch at ONRear washer switch on1.0 or lessRear washer motor Related wiring harnesses
Rear washer switch offB+
2IAutostop switch signalWindshield wiper moto (autostop switch)Ignition switch at ONWindshield wiper movingB+Autostop switch (windshield wiper motor) Related wiring harnesses
Windshield wiper stopped1.0 or less
2JPower door lock power supplyMain fuse blockUnder any conditionB+Related wiring harnesses
2KWindshield wiper motor controlWindshield wiper motor (high speed)Wiper switch at high positionB+Windshield wiper motor Related wiring harnesses
Other1.0 or less
2LWindshield wiper motor controlWindshield wiper motor (low speed)Wiper switch at low positionB+Windshield wiper motor Related wiring harnesses
Other1.0 or less
3ABCM GNDBody groundUnder any condition: Inspect for continuity to ground.Continuity detectedRelated wiring harnesses
3BWindshield wiper switch signal (low)Windshield wiper and washer switchIgnition switch at ONWindshield wiper switch at low position1.0 or lessWindshield wiper and washer switch Related wiring harnesses
OtherB+
3CWindshield wiper switch signal (high)Windshield wiper and washer switchIgnition switch at ONWindshield wiper switch at high position1.0 or lessWindshield wiper and washer switch Related wiring harnesses
OtherB+
3DCAN_HBecause this terminal is for communication, good/no good judgment by terminal voltage is not possible.Related wiring harnesses
3ESensitivity adjustment volume (with auto wiper system)Windshield wiper and washer switchIgnition switch at ONSensitivity adjustment volume turned from + position to - position0 --> 0.8 --> 1.5-->2.5--> 2.7Windshield wiper and washer switch Related wiring harnesses
INT volume (without auto wiper system)INT volume turned from lowest position to highest position0 --> 0.2 --> 0.7-->1.0-->1.4-->1.6-->1.8-->2.0-->2.1-->2.3
3FWasher switch signalWindshield wiper and washer switchIgnition switch at ONWasher switch onB+Windshield wiper and washer switch Related wiring harnesses
Washer switch off1.0 or less
3GCAN_LBecause this terminal is for communication, good/no good judgment by terminal voltage is not possible.Related wiring harnesses
3HLight switch signal (AUTO)Light switchIgnition switch at ONLight switch at AUTO position1.0 or lessLight switch Related wiring harnesses
OtherB+
3IHeadlight switch signal (high beam)Light switchLight switch at high position or flash-to-pass1.0 or lessLight switch Related wiring harnesses
OtherB+
3JWindshield wiper switch signal (AUTO) (with auto wiper system)Windshield wiper switchIgnition switch at ONWindshield wiper switch at AUTO position1.0 or lessWindshield wiper switch Related wiring harnesses
OtherB+
Windshield wiper switch signal (INT) (without auto wiper system)Windshield wiper switch at INT position1.0 or less
OtherB+
3KRear wiper switch signal (on)Rear wiper and washer switchIgnition switch at ONRear wiper switch at ON position1.0 or lessRear wiper and washer switch Related wiring harnesses
OtherB+
3LHeadlight switch signalLight switchLight switch at headlight position1.0 or lessLight switch Related wiring harnesses
Light switch at OFF positionB+
3MRear wiper switch signal (INT)Rear wiper and washer switchIgnition switch at ONRear wiper switch at INT position1.0 or lessRear wiper and washer switch Related wiring harnesses
OtherB+
3N
3OTNS signalLight switchLight switch at TNS position1.0 or lessLight switch Related wiring harnesses
Light switch at OFF positionB+
3PRear window defroster signal (with manual A/C)Climate control unitRear window defroster switch is pressed1.0 or lessClimate control unit Related wiring harnesses
Rear window defroster switch is releasedB+
3QTurn switch input (RH)Turn switchIgnition switch at ONTurn switch at right position1.0 or lessTurn switch Related wiring harnesses
OtherB+
3RFront fog light switch signalFront fog light switchFront fog light switch on1.0 or lessFog light switch Related wiring harnesses
Front fog light switch offB+
3SA/C operation signal (with manual A/C)Climate control unitA/C operating1.0 or lessClimate control unit Related wiring harnesses
A/C not operating5
3TTurn switch input (LH)Turn switchIgnition switch at ONTurn switch at left position1.0 or lessTurn switch Related wiring harnesses
OtherB+
3UPower supplyFuse blockIgnition switch at ONB+Ignition switch Related wiring harnesses
Ignition switch off1.0 or less
3VRear window defroster indicator control (with manual A/C)Climate control unitRear window defroster on1.0 or lessClimate control unit Related wiring harnesses
Rear window defroster offB+
3WHazard warning switch signalHazard warning switchHazard warning switch on1.0 or lessHazard warning switch Related wiring harnesses
Hazard warning switch offB+
3XPower supplyFuse blockIgnition switch at ONB+Ignition switch Related wiring harnesses
Ignition switch off1.0 or less
3YHorn controlHorn relayTransmitter LOCK button is pressed twice within 5 s.B+ --> 1.0 or less --> B+Horn relay Related wiring harnesses
OtherB+
3ZIgnition key illumination controlIgnition key illuminationIgnition switch off and driver-side door opened.1.0 or lessIgnition key illumination bulb Related wiring harnesses
15 s or more after all doors closed.B+
3AARear washer switch signalRear wiper and washer switchIgnition switch at ONRear washer switch on1.0 or lessRear wiper and washer switch Related wiring harnesses
Rear washer switch offB+
3ABSerial communicationKeyless receiverBecause this terminal is for communication, good/no good judgment by terminal voltage is not possible.Keyless receiver Related wiring harnesses
3AC
3ADKey reminder switch signalSteering lock unit (with advanced keyless system) Ignition switch (with keyless entry system)Key insertedB+Steering lock unit (with advanced keyless system) Ignition switch(with keyless entry system) Related wiring harnesses
Key removed1.0 or less
4AWindshield wiper motor power supplyIgnition switch Fuse blockIgnition switch at ONB+Ignition switch Related wiring harnesses
Ignition switch off1.0 or less
4BPower supplyFuse blockIgnition switch at ONB+Ignition switch Related wiring harnesses
Ignition switch off1.0 or less
4CIllumination controlIllumination bulbLight switch at TNS positionB+Illumination bulb Related wiring harnesses
Light switch at OFF position1.0 or less
4DKey reminder switch, ignition key illumination power supplyKey reminder switch Ignition key illuminationUnder any conditionB+Related wiring harnesses
4EGNDBody groundUnder any condition: Inspect for continuity to ground.Continuity detectedRelated wiring harnesses
4F
5ALiftgate latch switch signalLiftgate latch switchLiftgate is open. (Liftgate latch switch on)1.0 or lessLiftgate latch switch Related wiring harnesses
Liftgate is closed. (Liftgate latch switch off)B+
5B
5CSliding door switch signalSliding door switchesAny sliding door open (Sliding door switch on)1.0 or lessSliding door switches Related wiring harnesses
All sliding doors closed (Sliding door switch off)B+
5D
5EFront door latch switch (passenger-side) signalFront door latch switch (passenger-side)Front door (passenger-side) open (Front door latch switch (passenger-side) off)B+Front door latch switch (passenger-side) Related wiring harnesses
Front door (passenger-side) closed (Front door latch switch (passenger-side) on)1.0 or less
5F
5GFront door latch switch (driver-side) signalFront door latch switch (driver-side)Front door (driver-side) open (Front door latch switch (driver-side) off)B+Front door latch switch (driver-side) Related wiring harnesses
Front door (driver-side) closed (Front door latch switch (driver-side) on)1.0 or less
5H
5ILock/unlock signalDoor lock switchDoor lock switch is pressed to lock.2.5Door lock switch Related wiring harnesses
Door lock switch is pressed to unlock.1.0 or less
Other5
5J
5KParking brake switch signalParking brake switchIgnition switch at ONParking brake switch on1.0 or lessParking brake switch Related wiring harnesses
Parking brake switch offB+
5L
5MWiper or headlight operation requestRain sensorBecause this terminal is for communication, good/no good judgment by terminal voltage is not possible.Rain sensor Related wiring harnesses
5NPower supplySunroof unit Sunroof switchIgnition switch at ONB+Sunroof unit Sunroof switch Related wiring harnesses
Ignition switch off1.0 or less
5OUnlock input (Sliding door lock-link switch)Sliding door lock-link switchAll sliding doors locked5Sliding door lock-link switch Related wiring harnesses
Any sliding door unlocked1.0 or less
5PSeat weight sensor control module power supply (IG2)Seat weight sensor control moduleIgnition switch at ONB+Seat weight sensor control module Related wiring harnesses
Ignition switch off1.0 or less
5QUnlock input (Driver-side door key cylinder switch)Driver-side door key cylinder switchAt the moment key cylinder is unlocked1.0 or lessDriver-side door key cylinder switch Related wiring harnesses
Other5
5RTail light controlTail lightLight switch at TNS positionB+Tail light Related wiring harnesses
Light switch at OFF position1.0 or less
5SLock input (Driver-side door key cylinder switch)Driver-side door key cylinder switchAt the moment key cylinder is locked1.0 or lessDriver-side door key cylinder switch Related wiring harnesses
Other5
5TPower supplyRain sensorIgnition switch at ONB+Rain sensor Related wiring harnesses
Ignition switch off1.0 or less
5ULock input (Driver-side door lock-link switch)Driver-side door lock-link switchDriver-side door locked1.0 or lessDriver-side door lock-link switch Related wiring harnesses
Driver-side door unlocked5
5VRear 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 harnesses
Hazard warning switch on
Other1.0 or less
5WUnlock input (Driver-side door lock-link switch)Driver-side door lock-link switchDriver-side door locked5Driver-side door lock-link switch Related wiring harnesses
Driver-side door unlocked1.0 or less
5XRear 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 harnesses
Hazard warning switch on
Other1.0 or less
6ADoor lock controlDoor lock actuatorDoor lock actuator locking1.0 or less -->B+-->1.0 or lessDoor lock actuator Related wiring harnesses
Other1.0 or less
6BDoor unlock controlDoor lock actuatorDoor lock actuator unlocking1.0 or less-->B+-->1.0 or lessDoor lock actuator Related wiring harnesses
Other1.0 or less
6DDriver-side door unlock controlDriver-side door lock actuatorDriver-side door lock actuator unlocking1.0 or less-->B+-->1.0 or lessDriver-side door lock actuator Related wiring harnesses
Other1.0 or less
6F
6GRear wiper controlRear wiper motorRear wiper moving1.0 or lessRear wiper motor Related wiring harnesses
Rear wiper stoppedB+
6H
6IInterior light controlMap light Interior lightWithin 5 min after any door is opened.1.0 or lessMap light Interior light Related wiring harnesses
5 min or more after any door is opened.B+
All doors closedB+
6JInterior light power supplyMap light Interior light Cargo compartment lightUnder any conditionB+Related wiring harnesses
(1) With DRL
(1)With DRL

BODY CONTROL MODULE TERMINALS VOLTAGE SPECIFICATION