Multiplex Integrated Control System Description - Functional Control
MICU
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 | 12 volt battery voltage (VBU) | |
| B-CAN | MICU message (Under 10 V) |
Prevention of Key Locked Inside Vehicle
The MICU controls of the door lock actuators based on inputs from each switch and B-CAN data.
| Input | Output | |
|---|---|---|
| MICU | Key switch signal Driver's door switch Driver's door lock knob switch signal (UNLOCK) |
Door lock actuators (UNLOCK) Drive's door lock actuator (UNLOCK) |
| B-CAN | Keyless access key signal | Door lock signal (UNLOCK) |
Entry Lights Control System (Ceiling Light, Front Individual Map Light)
The MICU controls the interior lights based on inputs from each switch and B-CAN.
| Input | Output | |
|---|---|---|
| MICU | IG1 power supply Key switch signal Driver's door switch Front passenger's door switch Left rear door switch Right rear door switch Tailgate latch switch Driver's door lock knob switch signal (LOCK) Interior light cut signal |
Interior lights |
| B-CAN | Keyless signal Keyless access key signal |
Cargo Area Light
The MICU controls the cargo area light based on inputs from each switch.
| Input | Output | |
|---|---|---|
| MICU | IG1 power supply Tailgate latch switch Interior light cut signal |
Cargo area light |
| B-CAN |
Interior Lights Auto-Off Timer (Ceiling Light, Front Individual Map Light)
The MICU controls the interior lights OFF based on inputs from each switch and B-CAN data.
| Input | Output | |
|---|---|---|
| MICU | IG1 power supply Key switch signal Driver's door switch Front passenger's door switch Left rear door switch Right rear door switch Tailgate latch switch Driver's door key cylinder switch signal (LOCK/UNLOCK) Driver's door lock knob switch signal (LOCK/UNLOCK) Front passenger's door lock knob switch signal (UNLOCK) Left rear door lock knob switch signal (UNLOCK) Right rear door lock knob switch signal (UNLOCK) |
Interior lights |
| B-CAN | Keyless signal Door lock signal Keyless access key signal 12 volt battery condition signal |
Collision Detection Signal (CDS)
The MICU controls the door lock actuators based on inputs from ignition switch (IG1) and B-CAN data.
| Input | Output | |
|---|---|---|
| MICU | IG1 power supply | Door lock actuators (UNLOCK) Driver's door lock actuator (UNLOCK) |
| B-CAN | CDS signals | Door lock signal (UNLOCK) |
Power Door Locks
The MICU controls the door lock actuators based on inputs from each switch and B-CAN data.
| Input | Output | |
|---|---|---|
| MICU | IG1 power supply Key switch signal Driver's door switch Front passenger's door switch Left rear door switch Right rear door switch Tailgate latch switch Driver's door lock switch signal (LOCK/UNLOCK) Driver's door key cylinder switch signal (LOCK/UNLOCK) Driver's door lock knob switch signal (LOCK/UNLOCK) |
Door lock actuators (LOCK/UNLOCK) Driver's door lock actuator (UNLOCK) |
| B-CAN | Keyless access key signal | Door lock signal (LOCK/UNLOCK) |
Auto Power Door Locks (LOCK Operation)
The MICU controls the door lock actuators based on inputs from each switch and B-CAN data.
| 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 Tailgate latch switch Brake pedal position switch Driver's door lock knob switch signal (UNLOCK) Front passenger's door lock knob switch signal (UNLOCK) Left rear door lock knob switch signal (UNLOCK) Right rear door lock knob switch signal (UNLOCK) |
Door lock actuators (LOCK) |
| B-CAN | Vehicle speed pulse signal Engine speed pulse signal |
Door lock signal (LOCK) |
Auto Power Door Locks (UNLOCK Operation)
The MICU controls the door lock actuators based on inputs from each switch and B-CAN data.
| Input | Output | |
|---|---|---|
| MICU | IG1 power supply Transmission range switch (P position) ACCESSORY (ACC) power supply Driver's door switch Driver's door lock knob switch signal (UNLOCK) Front passenger's door lock knob switch signal (UNLOCK) Left rear door lock knob switch signal (UNLOCK) Right rear door lock knob switch signal (UNLOCK) Driver's door key cylinder switch signal (UNLOCK) |
Door lock actuators (UNLOCK) Driver's door lock actuator (UNLOCK) |
| B-CAN | Vehicle speed pulse signal | Door lock signal (UNLOCK) |
Auto Power Door Locks (LOCK/UNLOCK Switching Function)
The MICU controls the door lock actuators based on inputs from each switch and B-CAN data.
| Input | Output | |
|---|---|---|
| MICU | IG1 power supply Transmission range switch (P position) Driver's door switch |
Door lock actuators (LOCK/UNLOCK) Driver's door lock actuator (UNLOCK) Turn signal lights (left/right) |
| B-CAN | Engine speed pulse signal FOB ID data Customized mode data Customized data Diagnosis data |
Door lock signal (LOCK/UNLOCK) MICU message (TURNLRLY) MICU message (TURNRRLY) |
Door Lock Response Operation
The MICU controls the door lock actuators based on door lock signal sent by B-CAN data.
| Input | Output | |
|---|---|---|
| MICU | Door lock actuators (LOCK/UNLOCK) Driver's door lock actuator (UNLOCK) |
|
| B-CAN | Door lock signal | Door lock signal (LOCK/UNLOCK) |
Keyless Entry System (Door Lock)
The MICU controls the door lock actuators based on inputs from each switch and B-CAN data.
| Input | Output | |
|---|---|---|
| MICU | IG1 power supply Key switch signal Driver's door switch Front passenger's door switch Left rear door switch Right rear door switch Tailgate latch switch Driver's door lock switch signal (LOCK/UNLOCK) Driver's door key cylinder switch signal (LOCK/UNLOCK) Driver's door lock knob switch signal (LOCK) |
Door lock actuators (LOCK/UNLOCK) Driver's door lock actuator (UNLOCK) |
| B-CAN | Keyless signal Keyless access key signal |
Door lock signal (LOCK/UNLOCK) Relock signal (RELOCK) |
Keyless Entry System (Tailgate)
The MICU controls the tailgate release actuator based on inputs from each switch and B-CAN data.
| Input | Output | |
|---|---|---|
| MICU | IG1 power supply Key switch signal |
Tailgate release actuator |
| B-CAN | Vehicle speed pulse signal Keyless signal Keyless access key signal |
Security Alarm System
The MICU controls the lighting system and the horn based on inputs from each switch and B-CAN data.
| Input | Output | |
|---|---|---|
| MICU | IG1 power supply Key switch signal Driver's door switch Front passenger's door switch Left rear door switch Right rear door switch Tailgate latch switch Driver's door key cylinder switch signal (LOCK/UNLOCK) Driver's door lock knob switch signal (UNLOCK) Front passenger's door lock knob switch signal (UNLOCK) Left rear door lock knob switch signal (UNLOCK) Right rear door lock knob switch signal (UNLOCK) Security hood switch Transmission range switch (P position) |
Headlights (low beam) Parking lights Side marker lights Taillights License plate lights Security horn relay |
| B-CAN | Keyless signal Door lock signal Keyless access key signal |
MICU message (SCSET1) MICU message (SCSET2) ALARM message (SCACTION) ALARM message (SCHORN) ALARM message (SCPARKING) ALARM message (SCHLLO) ALARM message (SCCYCLE) |
Keyless Answer Back
The MICU controls the turn signal/hazard warning lights based on keyless signal sent by B-CAN.
| Input | Output | |
|---|---|---|
| MICU | Tailgate latch switch Driver's door lock knob switch signal (LOCK) Door lock actuator signal (LOCK/UNLOCK) |
Turn signal lights (left/right) Security horn relay Keyless buzzer |
| B-CAN | Keyless signal |
Security Answer Back
The MICU controls the turn signal/hazard warning lights based on keyless signal sent by B-CAN.
| Input | Output | |
|---|---|---|
| MICU | Security SET signal Door lock actuator signal (LOCK/UNLOCK) |
Turn signal lights (left/right) Security horn relay Keyless buzzer |
| B-CAN | Keyless signal |
Answer Back Response Operation (Turn signal light)
The MICU controls the turn signal/hazard warning lights based on keyless signal sent by B-CAN.
| Input | Output | |
|---|---|---|
| MICU | IG1 power supply | Turn signal lights (left/right) |
| B-CAN | Vehicle speed pulse signal Answer back signal (HAZARD) |
Keyless PANIC Operation
The MICU controls the PANIC operation based on B-CAN data.
| Input | Output | |
|---|---|---|
| MICU | Headlights (low beam) Parking lights Side marker lights Taillights License plate lights Security horn relay |
|
| B-CAN | PANIC signal (PANIC) PANIC signal (H/L LO) PANIC signal (PARKING LIGHT) PANIC signal (HORN) |
Car Finding Operation
The MICU controls the car finding operation based on B-CAN data.
| Input | Output | |
|---|---|---|
| MICU | Headlights (low beam) Parking lights Side marker lights Taillights License plate lights Security horn relay |
|
| B-CAN | Car finding signal (Car finding) Car finding signal (H/L LO) Car finding signal (PARKING LIGHT) Car finding signal (HORN) |
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 (OFF) Combination light switch (PARKING) Combination light switch (ON) Combination light switch (DIMMER) Combination light switch (PASSING) Transmission range switch (P position) |
|
| B-CAN | Parking brake switch Vehicle speed pulse signal |
Combination light switch signal (PARKING) Combination light switch signal (HLLO) Combination light switch signal (HLAUTO) Combination light switch signal (HLHI) Combination light switch signal (PASS) |
Exterior Lights
The MICU controls the exterior lights based on combination light switch inputs sent by B-CAN data.
| Input | Output | |
|---|---|---|
| MICU | IG1 power supply Combination light switch signal (PARKING) Combination light switch signal (HLLO) Combination light switch signal (HLAUTO) Combination light switch signal (HLHI) |
Headlights (low/high beam) Parking lights Side marker lights Taillights License plate lights |
| B-CAN | Relay module message (PARKINGRLY) Relay module message (HLLORLY) Relay module message (HLHIRLY) Relay module message (ILL SML) |
Headlight Auto OFF Function
The MICU controls the lighting system based on inputs from each switch and B-CAN data.
| Input | Output | |
|---|---|---|
| MICU | IG1 power supply Key switch signal Driver's door switch Driver's door lock knob switch signal (LOCK) Combination light switch signal (HLAUTO) Combination light switch signal (HLHI) |
Headlights (low/high beam) Parking lights Side marker lights Taillights License plate lights |
| Input | Output | |
|---|---|---|
| B-CAN | IG1 meter signal Keyless access key signal Automatic lighting signal (ALOFFPARKING) Automatic lighting signal (ALOFFHLLO) |
Relay module message (PARKINGRLY) Relay module message (HLLORLY) Relay module message (HLHIRLY) Relay module message (ILL SML) |
Automatic Lighting System
The MICU controls the automatic lighting system based on inputs from IG1 switch and B-CAN data.
| Input | Output | |
|---|---|---|
| MICU | IG1 power supply Combination light switch signal (HLAUTO) Combination light switch signal (HLHI) |
Headlights (low/high beam) Parking lights Side marker lights Taillights License plate lights |
| B-CAN | IG1 meter signal Automatic lighting signal (ALPARKING) Automatic lighting signal (ALHLLO) Automatic lighting signal (ALOFFPARKING) Automatic lighting signal (ALOFFHLLO) |
Relay module message (PARKINGRLY) Relay module message (HLLORLY) Relay module message (HLHIRLY) Relay module message (ILL SML) |
Daytime Running Lights
The MICU controls the headlights daytime running lights based on inputs from each switch and B-CAN data.
| Input | Output | |
|---|---|---|
| MICU | IG2 power supply Combination light switch signal (HILO) Combination light switch signal (SMALL) |
Daytime running light relay* 1 Headlight (High beam)* 2 |
| B-CAN | IG1 meter signal Parking brake switch signal Automatic lighting signal (ALSMALL) Automatic lighting signal (ALHLLO) Automatic lighting signal (ALOFFSMALL) Automatic lighting signal (ALOFFHILO) |
Relay module message (DRLKC) |
*1: With LED headlight*2: Without LED headlight
Front Fog Lights
The MICU controls the front fog lights based on inputs from combination light switch.
| Input | Output | |
|---|---|---|
| MICU | Front fog light switch Combination light switch signal (HLAUTO) |
Front fog light relay |
| B-CAN | Relay module message (FRFOGRLY) |
Turn Signal/Hazard Warning Lights
The MICU controls the turn signal/hazard warning lights based on inputs from each switch and the hazard warning switch.
| Input | Output | |
|---|---|---|
| MICU | IG1 power supply Turn signal switch (left/right) Hazard warning switch |
Turn signal lights (left/right) |
| B-CAN | MICU message (TURNLRLY) MICU message (TURNRRLY) MICU message (HAZARDSW) Combination light switch signal (TURNR) Combination light switch signal (TURNL) |
One-Push Turn Signals
The MICU controls the turn signal lights based on inputs from combination light switch.
| Input | Output | |
|---|---|---|
| MICU | IG1 power supply Turn signal switch (left/right) Hazard warning switch |
Turn signal lights (left/right) |
| B-CAN | MICU message (TURNLRLY) MICU message (TURNRRLY) MICU message (HAZARDSW) MICU message (TURN L ONETOUCH) MICU message (TURN R ONETOUCH) |
Windshield Wiper Switch
The MICU controls the wiper system based on inputs from each switch.
| Input | Output | |
|---|---|---|
| MICU | IG1 power supply Windshield wiper switch (INT and LO) Windshield wiper switch (HI and LO) Windshield wiper switch (MIST) Windshield washer switch intermittent dwell time controller |
|
| B-CAN | Windshield wiper switch signal (FRINT) Windshield wiper switch signal (FRWIPLO) Windshield wiper switch signal (FRWIPHI) Windshield wiper switch signal (FRWIPMIST) Windshield wiper switch signal (FRINTVR) |
Windshield Wiper
The MICU controls the windshield wiper based on inputs from each switch and B-CAN data.
| Input | Output | |
|---|---|---|
| MICU | IG1 power supply Windshield wiper switch signal (FRINT) Windshield wiper switch signal (FRWIPHI) Windshield wiper switch signal (FRWIPLO) Windshield wiper switch signal (FRMIST) Windshield wiper switch signal (FRINTVR) Windshield wiper switch (AUTO STOP) Windshield washer switch signal Transmission range switch (P position) Brake pedal position switch |
Windshield wiper relay (INT) Windshield wiper relay (HIGH) |
| B-CAN | IG1 meter signal Parking brake switch Vehicle speed pulse signal |
Relay module message (FRWIPAS) Relay module message (FRWIPMTR) |
Rear Window Wiper Switch
The MICU controls the rear window wiper system based on inputs from rear window wiper switch.
| Input | Output | |
|---|---|---|
| MICU | Rear window wiper switch (INT) Rear window wiper switch (LO) |
|
| B-CAN | Rear window wiper switch signal (RRWIPINT) Rear window wiper switch signal (RRWIPLO) |
Rear Window Wiper Operation
The MICU controls the rear window wiper based on inputs from each switch and B-CAN data.
| Input | Output | |
|---|---|---|
| MICU | IG1 power supply Rear window wiper switch (AUTO STOP) Back-up lights Rear window wiper switch signal (RRWIPINT) Rear window wiper switch signal (RRWIPLO) Windshield wiper switch signal (FRINT) Windshield wiper switch signal (FRWIPHI) Windshield wiper switch signal (FRWIPLO) |
Rear window wiper relay |
| B-CAN |
Washer Operation
The MICU controls the windshield washer motor based on inputs from each switch.
| Input | Output | |
|---|---|---|
| MICU | IG1 power supply Windshield washer switch Rear window washer switch |
Windshield/rear window washer motor |
| B-CAN | Windshield washer motor message (FRWASHRLY) Rear window washer motor message (RRWASHRLY) |
Power Window Relay
The MICU controls the power window key-off operation based on inputs from ignition switch and B-CAN data.
| Input | Output | |
|---|---|---|
| MICU | IG1 power supply | Power window relay |
| B-CAN | Power window signal (PWRLY) Power window signal (TIMER) Power window signal (TIMERVALUE) |
Key Interlock (CVT)
The MICU controls the key interlock solenoid based on inputs from each switch.
| Input | Output | |
|---|---|---|
| MICU | ACCESSORY (ACC) power supply Transmission range switch (P position) Park pin switch |
Key interlock solenoid |
| B-CAN |
A/C Switch
The MICU controls the A/C switch signal based on inputs from each switch.
| Input | Output | |
|---|---|---|
| MICU | IG1 power supply A/C switch |
|
| B-CAN | Relay module message (ACPRESW) |
Rear Window Defogger Switch
The MICU controls the rear window defogger signal based on inputs from each switch.
| Input | Output | |
|---|---|---|
| MICU | IG1 power supply Rear window defogger switch |
|
| B-CAN | MICU message (RRDEFSW) |
Heated Windshield Wiper Area Operation
The MICU controls the heated windshield wiper area based on inputs from each switch and B-CAN data.
| Input | Output | |
|---|---|---|
| MICU | IG1 power supply Heated windshield wiper area switch |
Heated windshield wiper area relay |
| Input | Output | |
|---|---|---|
| B-CAN | MICU message (FEDICERSW) MICU message (FEDICERRLY) |
FOB ID Transmission Operation
The MICU controls the FOB ID transmission based on inputs from each switch and B-CAN data.
| Input | Output | |
|---|---|---|
| MICU | Key cylinder switch IG1 power supply |
|
| B-CAN | Keyless signal Door lock signal |
FOB ID message (FOB ID) |