Honda Civic Service Manual: 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.
|
Input
|
Output
|
|
MICU
|
Battery voltage (VBU)
|
|
|
B-CAN
|
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MICU (Under 10 V) message
|
|
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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 an input signal from the trunk lid
latch switch.
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Input
|
Output
|
|
MICU
|
IG1 power supply
Trunk lid latch switch
|
Trunk light
|
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B-CAN
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Light cut signal
|
|
|
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Collision Detection Signal (CDS)
The MICU controls the door lock actuators based on IG1 and SRS (CDS) inputs.
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Input
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Output
|
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MICU
|
IG1 power supply
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Door lock actuator (UNLOCK)
Driver's door lock actuator (UNLOCK)
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B-CAN
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CDS signals
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Door lock actuator (UNLOCK)
|
|
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Key Interlock
The MICU controls the key interlock solenoid based on the ignition switch ACCESSORY
(I) position, the transmission range switch P position, and the park-pin switch
inputs.
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Input
|
Output
|
|
MICU
|
Ignition switch ACCESSORY (I)
Transmission range switch (P) position
Park-pin switch
|
Key interlock solenoid
|
|
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Combination Light Switch
The MICU controls the lighting system based on inputs from the combination light
switch.
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Input
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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)
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|
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B-CAN
|
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Parking light
Headlight (high beam, low beam, passing)
Headlight (AUTO)
|
|
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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
|
|
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Headlight Auto-OFF Function*
The MICU controls the lighting system based on inputs from each switch.
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Input
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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.
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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
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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
|
|
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
|
|
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)
|
|
|
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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
|
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
|
|
|
Fuel Fill Door Operation
The MICU controls the fuel fill door switch based on fuel fill door switch signal.
|
Input
|
Output
|
|
MICU
|
Fuel fill door switch
|
|
|
B-CAN
|
|
Fuel fill door switch
|
|
|
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
|
|
|
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.
...
Multiplex Integrated Control System (MICS) Description - Functional Control
('13: except Natural Gas models)