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Honda Civic Service Manual: Multiplex Integrated Control System (MICS) Description - Functional Control ('13: except Natural Gas models)

Honda Civic Service Manual / Electrical / Data and Communication Network / Multiplex Integrated Control System (MICS) Description - Functional Control ('13: except Natural Gas models)

Power Supply Voltage Monitoring Function

The MICU monitors the power supply voltage (backup voltage). If the voltage drops below 10 V, the MICU does not store DTCs.


Input

Output

MICU

Battery voltage (VBU)

B-CAN

MICU (Under 10 V) message

Entry Lights Control System (Ceiling Lights, Map Lights, Ignition Key Light)

The MICU controls the interior light and ignition key light ON/OFF based on input signals from each switch.


Input

Output

MICU

IG1 power supply
Ignition key switch
Driver's door switch
Front passenger's door switch
Left rear door switch
Right rear door switch
Trunk lid latch switch

Interior lights
Ignition key light

B-CAN

Driver's door lock knob switch (LOCK/UNLOCK)
Keyless LOCK/UNLOCK signal

Trunk Light

The MICU controls the trunk light based on input signal from trunk lid latch switch.


Input

Output

MICU

IG1 power supply
Trunk lid latch switch

Trunk light

B-CAN

Light cut signal

Collision Detection Signal (CDS)

The MICU controls the door lock actuators based on IG1 and SRS (CDS) inputs.


Input

Output

MICU

IG1 power supply

Door lock actuator (UNLOCK)
Driver's door lock actuator (UNLOCK)

B-CAN

CDS signals

Door lock actuator (UNLOCK)

Key Interlock (A/T)

The MICU controls the key interlock solenoid based on ignition switch ACCESSORY (I) position, the transmission range switch P position, and the park-pin switch inputs.


Input

Output

MICU

Ignition switch (ACC)
Transmission range switch (P) position
Park-pin switch

Key interlock solenoid

Combination Light Switch

The MICU controls the lighting system based on inputs from the combination light switch.


Input

Output

MICU

IG1 power supply
Combination light switch (ON)
Combination light switch (OFF)
Combination light switch (PARKING)
Combination light switch (PASSING)
Combination light switch (DIMMER)

B-CAN

Parking light
Headlight (high beam, low beam, passing)
Headlight (AUTO)

Daytime Running Lights

The MICU controls the headlights as daytime running lights based on inputs from each switch.


Input

Output

MICU

IG2 power supply
Left headlight (high beam) sensor
Right headlight (high beam) sensor

Headlight (high beam)

B-CAN

Parking brake signal
IG1 meter signal
Auto headlight LO signal
Auto headlight LO off signal

DRL messages

Fog Lights

The MICU controls fog lights based on inputs from the fog light switch.


Input

Output

MICU

Combination light switch (Fog light switch)

Fog lights

B-CAN

Fog light signal

Headlight Auto-OFF Function*

The MICU controls the lighting system based on inputs from each switch.


Input

Output

MICU

IG1 power supply
Ignition key switch
Driver's door switch

Parking lights
Headlight (low beam)
Left headlight (high beam)
Right headlight (high beam)

B-CAN

IG1 meter signal
Keyless LOCK/UNLOCK signal
Auto light off signals
Auto headlight LO off signal

Parking light signal
Headlight signal (high beam, low beam)
Headlight signal (low beam)
Interior signals


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

Turn Signal/Hazard Warning Lights

The MICU controls the turn signal/hazard warning lights based on inputs from the turn signal switch and the hazard warning switch.


Input

Output

MICU

IG1 power supply
Hazard warning switch
Turn signal switch (left)
Turn signal switch (right)

Turn signal lights (left)
Turn signal lights (right)

B-CAN

TURNLRLY message
TURNRRLY message
TURNRSW message
TURNLSW message
HAZARDSW message

Wiper*

The MICU controls the wiper based on inputs from each switch.


Input

Output

MICU

IG1 power supply
Wiper switch (AS)
Brake pedal position switch
Transmission range switch (P) position

Wiper intermittent relay
Wiper motor high relay

B-CAN

IG1 meter signal
Parking brake signal
Vehicle speed pulse signal

WIPSW message


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

Driver's Power Window Relay

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


Input

Output

MICU

IG1 power supply

Power window relay

B-CAN

Power window relay signal
Power window timer signals

Keyless Answer Back

The MICU controls the lighting system and horns based on keyless signals sent by the B-CAN data.


Input

Output

MICU

Parking light
Horn
Keyless buzzer

B-CAN

Keyless LOCK/UNLOCK signal

Security Answer Back

The MICU controls the lighting system and horns based on keyless signals sent by the B-CAN data.


Input

Output

MICU

Parking light
Horn
Keyless buzzer

B-CAN

Keyless LOCK/UNLOCK signal

Answer Back Response Operation

The MICU controls the lighting system and horns based on keyless signals sent by the B-CAN data.


Input

Output

MICU

Parking light
Headlight (low beam)
Horn

B-CAN

Answer back signal (PARKING LIGHT)
Answer back signal (H/L LO)
Answer back signal (HORN)

Power Door Locks

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


Input

Output

MICU

IG1 power supply
Ignition key switch
Driver's door switch
Front passenger's door switch
Left rear door switch
Right rear door switch
Trunk lid latch switch

Door lock actuators (LOCK)
Door lock actuators (UNLOCK)
Driver's door lock actuator (UNLOCK)

B-CAN

Keyless LOCK/UNLOCK signal

Door lock signal (LOCK)
Door lock signal (UNLOCK)

Door Lock Response Operation

The MICU controls the door lock actuators LOCK, UNLOCK, DRIVER'S UNLOCK, TRUNK UNLOCK based on the B-CAN door lock switch signals.


Input

Output

MICU

Door lock actuators (LOCK)
Door lock actuators (UNLOCK)
Driver's door lock actuator (UNLOCK)

B-CAN

Driver's door lock knob switch (LOCK/UNLOCK)

Door lock signal (LOCK)
Door lock signal (UNLOCK)

Keyless Entry System

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


Input

Output

MICU

IG1 power supply
Ignition key switch
Driver's door switch
Front passenger's door switch
Left rear door switch
Right rear door switch
Trunk lid latch switch

Door lock actuators (LOCK)
Door lock actuators (UNLOCK)
Driver's door lock actuator (UNLOCK)

B-CAN

Driver's door lock knob switch (LOCK/UNLOCK)
Keyless LOCK/UNLOCK signal

Door lock signal (LOCK)
Door lock signal (UNLOCK)
Relock signal

Keyless PANIC Operation

The MICU controls the keyless PANIC operation based on keyless signal sent by the B-CAN data.


Input

Output

MICU

Parking lights
Headlight (low beam)
Horn

B-CAN

PANIC signals

Auto Power Door Locks (LOCK Operation)*

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


Input

Output

MICU

IG1 power supply
Transmission range switch (P) position
Driver's door switch
Front passenger's door switch
Left rear door switch
Right rear door switch
Trunk lid latch switch
Brake pedal position switch

Door lock actuators (LOCK)

B-CAN

Vehicle speed pulse signal
Engine RPM

Door lock signal (LOCK)


*: This system can be customized in the multi-information display (MID) to suit the customer needs. For more information about customizing system 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.


Input

Output

MICU

IG1 power supply
Transmission range switch (P) position
Ignition switch ACCESSORY (I)

Door lock actuators (UNLOCK)
Driver's door lock actuator (UNLOCK)

B-CAN

Door lock signal (UNLOCK)


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

Security Alarm System

The MICU controls the lighting system and horns based on inputs from each switch and the B-CAN data.


Input

Output

MICU

Ignition key switch
IG1 power supply
Radio switch
Driver's door switch
Front passenger's door switch
Left rear door switch
Right rear door switch
Trunk lid latch switch
Hood switch

Parking light
Headlight (low beam)
Horn

B-CAN

Driver's door lock knob switch (LOCK/UNLOCK)
Door lock command
Keyless LOCK/UNLOCK signal
Immocode

MICU (SET 1) message
MICU (SET 2) message
ALARM (ACTION) message
ALARM (CYCLE) message
ALARM (PARKING LIGHT) message
ALARM (H/L LOW) message
ALARM (HORN) message

Automatic Lighting System

The MICU controls the automatic lighting system based on inputs from each switch and B-CAN data.


Input

Output

MICU

IG1 power supply

Parking light
Headlight (low beams, high beams)

B-CAN

IG1 meter signal
Auto light signals

Headlight (high beam, low beam) signals
Parking light signal
Interior light signals

One-Push Turn Signals

The MICU controls the automatic lighting system based on inputs from each switch and B-CAN data.


Input

Output

MICU

IG power supply
Turn signal switch (left/right)
Hazard warning switch

Turn signal lights (left/right)

B-CAN

 

TURNLRLY message
TURNRRLY message
HAZARDSW message
TURN L ONETOUCH message
TURN R ONETOUCH message

Multiplex Integrated Control System (MICS) Description - Functional Control ('13-'14: Natural Gas models)
Power Supply Voltage Monitoring Function The MICU monitors the power supply voltage (backup voltage). If the voltage drops below 10 V, the MICU does not store DTCs. ...

"Fuses Junctions and Relays"
...

See also:

Honda Civic Owners Manual. Modifications
Do not modify your vehicle in a manner that may affect its handling, stability, or reliability, or install non-genuine Honda parts or accessories that may have a similar effect. Even minor modifications to vehicle systems can affect overall vehicle performance. Always make sure all equ ...

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