Home/Acura/MDX/Acura MDX II facelift (2010-2013)/Repair manual/Communication Devices/Multiplex Integrated Control System: Overview
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Multiplex Integrated Control System: Overview Acura MDX II facelift

Communication Devices 2 illustrations ~273 words

Scheme 1

Scheme 1: Component Location index

Scheme 2

Scheme 2

Headlight Washer Operation

The MICU controls the headlight washer system based on input from the headlight washer switch.

InputOutput
MICUHeadlight washer switch
B-CANHeadlight washer messages

Door Lock Response Operation

The MICU controls the door lock actuators based on inputs from the door lock signals.

InputOutput
B-CANDoor lock signalsDoor lock actuators (LOCK) Door lock actuators (UNLOCK) Driver's door lock actuator (UNLOCK)

Answer Back Response Operation

The MICU controls the turn signal lights based on keyless signals sent by B-CAN.

InputOutput
MICUIG1 power supplyTurn signal lights (left) Turn signal lights (right)
B-CANAnswer back signal (buzzer) Answer back signal (hazard) Vehicle speed pulse signal

Auto Power Door Locks (LOCK operation)*

The MICU controls the door lock actuators based on inputs from each switch.

InputOutput
MICUIG1 power supply Ignition key switch Transmission range switch (P position) Driver's door switch Front passenger's door switch Left rear door switch Right rear door switchDoor lock actuators (LOCK)
B-CANDriver's door lock knob switch (UNLOCK) Front passenger's door lock knob switch (UNLOCK) Left rear door lock knob switch (UNLOCK) Right rear door lock knob switch (UNLOCK) Vehicle speed pulse signal Engine speed signal Full latch switch (Built into the tailgate closer unit)

*: This system can be customized using the multi-information display (MID) to suit the customer's needs. For more information about customizing options, refer to the Owner's Manual.

Auto Power Door Locks (UNLOCK operation)*

The MICU controls the door lock actuators based on inputs from each switch.

InputOutput
MICUIG1 power supply Transmission range switch (P position) Ignition key switch Driver's door switch Front passenger's door switch Left rear door switch Right rear door switchDoor lock actuators (UNLOCK) Driver's door lock actuator (UNLOCK)
B-CANDriver's door lock knob switch (UNLOCK) Front passenger's door lock knob switch (UNLOCK) Left rear door lock knob switch (UNLOCK) Right rear door lock knob switch (UNLOCK) Full latch switch (Built into the tailgate closer unit)

*: This system can be customized using the multi-information display (MID) to suit the customer's needs. For more information about customizing options, refer to the Owner's Manual.

Power Mirror Operation

The MICU controls the power mirror based on inputs from each switch.

InputOutput
MICUPower mirror adjustment switch (up) Power mirror adjustment switch (down) Power mirror adjustment switch (left) Power mirror adjustment switch (right) Power mirror selector switch (L) Power mirror selector switch (R)
B-CANPower mirror messages

Rear Window Defogger Timer Operation

The rear MICU controls the rear window defogger timer based on inputs from each switch.

InputOutput
Rear MICUIG1 power supplyRear window defogger relay
B-CANRear window defogger switch

Rear Window Wiper Operation

The rear MICU controls the rear window wiper motor and washer motor based on inputs from each switch.

InputOutput
Rear MICUIG1 power supply Rear window wiper motor stop switchRear window wiper motor Rear window washer motor
B-CANWindshield wiper switch (LO/HI/INT) Rear window wiper switch (INT) Washer switch (FR WASH/RR WASH) Transmission range switch (R)

The rear MICU controls the keyless buzzer based on inputs from the answer back signals.

InputOutput
Rear MICUKeyless buzzer
B-CANAnswer back signals

Fuel Fill Door Opener Operation

The rear MICU controls the fuel fill door based on inputs from the door lock signals.

InputOutput
Rear MICUFuel fill door opener solenoid
B-CANDoor lock signal

Windshield Wiper/Washer (Normally operation)

The relay control module controls the windshield wiper/washer based on inputs from each switch.

InputOutput
Relay control moduleIG1 power supply Windshield wiper motor stop switchWindshield wiper intermittent relay circuit Windshield wiper motor relay circuit Windshield washer motor relay circuit
B-CANWindshield wiper switch (INT/LO/HI/MIST) Washer switch (FR WASH/RR WASH) Intermittent wiper dwell time controllerRelay control module message