FAIL-SAFE FUNCTION
When communication fails in any of the CAN bus lines (communication lines), a fail-safe function(s) will operate. The fail-safe function that is specified for each system operates to prevent those systems from malfunctioning.
The following table shows the effects on each system when communication is impossible. (For further details, see the pages for each system.)
| Function |
|
Fail-safe Function System Behavior | Indicator and Buzzer Behavior or User Notification | DTC Detection (ECU that stored DTC) |
|---|---|---|---|---|
| Engine System Indicator Display
|
|
|
|
- |
| Electrical Load Control (Idle up according to the electrical load is performed.) |
|
Idle up according to the electrical load is not performed. | The idling speed changes. | - |
| Air Conditioner
|
|
Air conditioning-linked control does not operate (cannot perform idle up). | Air conditioner does not operate. | - |
| PTC Heater (Performs idle up according to requests from the PTC heater [including the coolant heater] or heater system.) |
|
The PTC heater does not operate (permission is not granted). |
|
- |
| Eco Driving Indicator (Displays information to the driver to encourage eco-driving.) |
|
Nothing | No information is displayed. | - |
| Integrated Control (VDM) (Estimates the driver requested torque based on the accelerator pedal operation and performs torque characteristic control according to driving conditions so that drivability, acceleration performance and acceleration feeling are improved.) |
|
Does not estimate the driver requested torque based on the accelerator pedal operation and does not perform torque characteristic control according to driving conditions and as a result, drivability, acceleration performance and acceleration feeling are not improved. | Does not estimate the driver requested torque based on the accelerator pedal operation and does not perform torque characteristic control according to driving conditions and as a result, drivability, acceleration performance and acceleration feeling are not improved. | - |
| Eco Control (Performs electronic throttle control according to fuel consumption.) |
|
Eco mode does not operate. | Eco mode does not operate. | - |
| ECT System Indicator (Indicates the shift position, states of switches, system modes, etc.) |
|
Power/snow mode driving control cannot be performed. |
|
- |
| AI-SHIFT Control (Controls the automatic transmission in order to improve engine braking power and acceleration feel.) |
|
AI-SHIFT control does not operate. | Nothing | - |
| Coast Downshift (Changes the coast downshift point based on the air conditioning load.) |
|
Coast downshift does not operate. | Coast downshift shock becomes stronger. | - |
| Heater Requested Upshift Delay (Performs heater requested upshift delay.) |
||||
| Cruise Control (Adjusts the engine throttle valve opening amount automatically to control the vehicle.) |
|
Nothing |
|
- |
| TC DTC Output Service (While TC = ON is being received from the ECM, a DTC is output in response to the request from the combination meter assembly.) |
|
Changes to a separate count inside the ECU and sets separate count recognition information when it receives a fail value or communication stops. | Nothing | - |
| Timestamp (Records DTCs and timestamps received from the main body ECU.) |
|
Changes to a separate count inside the ECU and sets separate count recognition information when it receives a fail value or communication stops. | Nothing | - |
| Event Data Recorder (EDR) (Records conditions, such as the vehicle speed, the amount the accelerator is depressed, and the shift lever position when the event data recorder recording conditions are met.) |
|
|
Nothing | - |
| Airbag Warning Light Control (Sends airbag warning light illumination information.) |
|
Nothing | Nothing | - |
| Collision Detection Signal (Notifies the system of a collision in order to perform fuel cut when a vehicle collision occurs.) |
|
Nothing | Nothing | - |
| Seat Belt Warning Control (Sends information about the passengers in order to turn the seat belt warning on and off.) |
|
Nothing | Nothing | - |
| Trigger Signal/Autonomous Transmission (Outputs the yaw rate sensor signal.) |
|
The yaw rate sensor information signal is sent at regular intervals every 0.012 seconds. | Nothing | - |
| Drive Data Recorder (DDR) (Records conditions such as the vehicle speed, the amount the accelerator is depressed, and the shift lever position when the drive data recorder recording conditions are met.) |
|
|
Nothing | - |
| Entry and Start System
|
|
An entry unlock retry is performed. |
|
(Certification ECU [smart key ECU assembly]) |
| Entry and Start System
|
|
The previous value is maintained. | Incorrect entry and start system warnings are output. | U0100 (Certification ECU [smart key ECU assembly]) |
| Wireless Function (Operates the wireless lock/unlock functions, etc.) |
|
Nothing |
|
U0142 (Certification ECU [smart key ECU assembly]) |
| Remote Engine Start Function (Requests for the immobiliser to be unset in response to data from the remote engine start ECU.) |
|
Nothing | The remote engine start does not operate. | - |
| Memory Function (Moves the seat and steering wheel to the recorded positions when an entry unlock or wireless unlock operation is performed.) |
|
Nothing |
|
U0142 (Certification ECU [smart key ECU assembly]) |
| Ignition Switch Illumination Control (Operates the ignition switch illumination in conjunction with the dome light illumination, etc.) |
|
|
|
U0142 (Certification ECU [smart key ECU assembly]) |
| Security Indicator Display Function (Displays the immobiliser security condition.) |
|
Nothing | Unable to display security condition normally (illuminates during security warning preparation/security warning). | U0142 (Certification ECU [smart key ECU assembly]) |
| Steering Sensor (Detects the steering wheel angle.) |
|
STR1S01 (STS0=1) is periodically transmitted every 12 ms. | Nothing | - |
| Engine Start 1 (Requests to release the immobiliser according to bidirectional communication with the certification ECU.) |
|
Engine starting control is not possible. | Unable to start engine with remote engine starter. | - |
| Engine Start 2 (Requests to turn the ACC and IG power supply on and off.) |
|
Engine starting control is not possible. | Unable to start engine with remote engine starter. | - |
| Vehicle Registration (Requests to register the remote starter according to two-way communication with the certification ECU.) |
|
Registration of remote start to vehicle not possible. | No answer-back indicating registration to the vehicle completed. | - |
| Air Conditioning Control (Requests automatic air conditioning and defogger control.) |
|
During remote starter control, air conditioning control is not possible. | Does not perform air conditioning control during remote starter control. | - |
| Leveling (Judges the vehicle driving condition from the vehicle speed data and calculates the pitch angle from the vehicle height sensor value using the pitch angle conversion formula to adjust the vertical beam axis of the headlights.) |
|
Leveling control is stopped (beam axis position is stopped at position when malfunction was detected). | Nothing |
(Headlight leveling ECU assembly) |
| Leveling (Dynamic) (Judges the vehicle driving condition from the vehicle speed data and calculates the pitch angle from the vehicle height sensor value using the pitch angle conversion formula to adjust the vertical beam axis of the headlights.) |
|
|
Nothing |
(Headlight leveling ECU assembly) |
| Leveling Indicator (Monitors leveling system malfunctions and when a malfunction is detected, sends an indicator illumination request to the meter.) |
|
The leveling indicator state is maintained. | Nothing |
(Headlight leveling ECU assembly) |
| Leveling Destination Judgment Crosschecks the (stored) destination setting with the destination information from the CAN bus line. |
|
Nothing | Nothing |
(Headlight leveling ECU assembly) |
| Cleaner Output (When the headlights are on, operates the headlight cleaner switch in conjunction with the front wiper switch and turns the dedicated cleaner relay on.) |
|
|
Nothing | U0142 (Headlight leveling ECU assembly) |
| LED Headlight Indicator (Monitors low beam LED malfunctions (short circuits) and when a malfunction is detected, sends an indicator illumination request to the meter.) |
|
The LED headlight indicator status is maintained. | Nothing |
(Headlight leveling ECU assembly) |
| Headlight Cleaner Signal Output (Outputs the headlight cleaner relay ON signal based on the direct line front washer switch signals, headlight cleaner switch signals, low beam illumination command from the main body ECU and IG data.) |
|
Headlight cleaner operation is stopped. | Nothing | U0142 (Headlight leveling ECU assembly) |
| Panel Control (Controls the selecting of the registers, temperature adjustment, etc. according to the operation of the touch panel switches on the display.) |
|
|
The "Climate control system error. Please contact your dealer." screen appears. |
(Multi-media module receiver assembly) |
| Eco Navigation Display (Displays the fuel consumption in 1 minute intervals, and displays the average fuel consumption history.) |
|
|
|
(Multi-media module receiver assembly) |
| Rear View Monitor Control (Displays the guide lines based on the steering sensor, vehicle speed and vehicle information [whether the vehicle is 2WD or 4WD, the VGRS information and long/short information].) |
|
|
|
(Multi-media module receiver assembly) |
| Destination Determination (Determines the destination based on the destination symbol and destination package information and selects the display language, time zone, etc.) |
|
Determines the destination according to the last received value and operates accordingly (if there is no last received value, the system operates using the default value). | The time zone and language selection screens do not match the destination. | U0140 (Multi-media module receiver assembly) |
| Vehicle Customize Function (Changes the behavior and control parameters of various functions [illumination lighting time, etc.] according to the user operation via the screen.) |
|
|
The customize options for items related to the ACN, BDB, IDT, DST and TAT ECU are not displayed or the settings cannot be saved. |
(Multi-media module receiver assembly) |
| ESPO (Displays the level of "Eco" driving.) |
|
Vehicle distance function and fuel consumption function are stopped and the output information for that trip is discarded. | Nothing | - |
| Time Stamp Function (Matches the relative time from the main body ECU with the absolute time acquired from the GPS.) |
|
Nothing | Nothing |
(Multi-media module receiver assembly) |
| Tire Pressure Display (Receives information from the tire pressure warning ECU and displays the tire pressure, tire position and system status.) |
|
|
|
U0073 (Multi-media module receiver assembly) |
| Meter-linked Function (Changes display based on customization information set through the meter. Outputs the customization information set in the system.) |
|
Maintains the last valid state. | Nothing | - |
| Door Lock (Operates the lock and unlock [the key-linked function, key lock-in prevention function, automatic lock function, etc.].) |
|
|
Nothing |
(Main body ECU [multiplex network body ECU]) |
| Alarm (Sounds various warnings.) |
|
Nothing | Nothing |
(Main body ECU [multiplex network body ECU]) |
| Automatic Dimming of Display (Controls the display dimming.) |
|
Automatically performs display dimming control when tail mode is not canceled (when the light sensor illuminance signal value is less than the display dimming value, the interior displays and indicators are dimmed). | Nothing | U0155 (Main body ECU [multiplex network body ECU]) |
| Trunk Opener (Performs trunk open control [receives trunk open requests].) |
|
Prohibits opening the trunk. | Nothing |
(Main body ECU [multiplex network body ECU]) |
| Illumination (Performs illumination control.) |
|
|
The dome light does not turn off immediately after exiting the vehicle. |
(Main body ECU [multiplex network body ECU]) |
| Seat and Mirror Control (Controls the memory function [the seat, steering wheel and mirror position adjustments].) |
|
|
Nothing |
(Main body ECU [multiplex network body ECU]) |
| Diagnostic/C-BEST (Diagnostic phase 4 communication.) |
|
Exits diagnostic mode. | Nothing | - |
| Entry and Start/Wireless (Controls entry and start/wireless functions.) |
|
Smart lock/unlock control is not possible. | Nothing | U0327 (Main body ECU [multiplex network body ECU]) |
| Lighting Control (Controls the daytime running lights.) |
|
Daytime running light control is not performed. | Nothing | U0100 (Main body ECU [multiplex network body ECU]) |
| Back Door Opener (Performs back door opener control and power back door one motion open control.) |
|
|
Nothing |
(Main body ECU [multiplex network body ECU]) |
| TPMS (Monitors the tire pressure and meter speed, etc. and operates the meter indicators and multi-information display.) |
|
Sends an initial communication value to BERKES. | The tire pressure monitor sensor indicator in the combination meter blinks for 1 minute and then stays illuminated. | U0155 (Main body ECU [multiplex network body ECU]) |
| Entry Beam (Detects oncoming traffic, vehicles ahead, street lights, etc. using an on board sensor and automatically turns the high beam lights on and off.) |
|
The system does not operate (the indicator in the meter blinks). | The indicator in the meter blinks. |
(Main body ECU [multiplex network body ECU]) |
| Light Control (Light ECU) (The light ECU controls the load around the headlights [body ECU sends illumination requests to the light ECU]). |
|
Nothing | Nothing | U0182 (Main body ECU [multiplex network body ECU]) |
| Equipment Related (Controls accessory remote starter and alarms.) |
|
|
|
U1117 (Main body ECU [multiplex network body ECU]) |
| LED Headlight Warning (Notifies the driver of an LED headlight malfunction when it detects an open circuit in the LED headlight, or an open circuit, ground fault or supply fault in the LED headlight driver.) |
|
LED headlight warning control does not operate. | Nothing | U0100 (Main body ECU [multiplex network body ECU]) |
| Microcomputer Preset Steering
|
|
Nothing | The memory, recall, auto-return and auto-away functions do not operate. |
(Multiplex tilt and telescopic ECU) |
| Light Control (Controls the illumination of the lights based on courtesy switch information and interior light information.) |
|
The mirror puddle lights do not operate. | The mirror puddle lights do not operate. | - |
| Mirror Operation Control (Controls the operation of the outer mirrors according to the mirror switch information from the main body ECU [multiplex network body ECU], etc.) |
|
The mirrors do not operate manually. | The mirrors do not operate manually. | U0142 (Outer mirror control ECU assembly) |
| Mirror Heater Control (Controls the operation of the outer mirror heaters based on defogger switch information from the air conditioning amplifier assembly, etc.) |
|
The mirror heaters do not operate. | The mirror heaters do not operate. | U0142 (Outer mirror control ECU assembly) |
| Outer Mirror Retraction Control (Controls the electronic retraction operation of the outer mirrors according to the mirror switch information from the main body ECU [multiplex network body ECU], etc.) |
|
The electronic mirror retraction function does not operate. | The electronic mirror retraction function does not operate. | - |
| Mirror Reverse Control (Controls the reverse operation of the outer mirrors based on reverse request information from the main body ECU [multiplex network body ECU].) |
|
The mirror reverse-linked operation does not operate. | The mirror reverse-linked operation does not operate. | - |
| Mirror Memorization and Recall Control (Memorizes and recalls the mirror position of the outer mirrors based on the memory request from the main body ECU [multiplex network body ECU].) |
|
|
|
- |
| Memory Switch Signal Substitute Transmission (Transmits the memory switch signal via CAN communication.) |
|
Nothing | The seat and mirror position memorization and recall functions do not operate. | - |
| Microcomputer Preset Driving Position System
|
|
|
|
- |
| Tire Air Pressure Monitor (Identifies specific wheel equipped with transmitter that monitors tire air pressure.) |
|
Nothing | Nothing | U0129 (Tire pressure warning ECU) |
| Automatic High Beam (Controls the high beams.) |
|
The current conditions are maintained. | Displays a message on the multi-information display. | - |
| Vehicle Speed Information Input (Controls solenoid current (VFC solenoid) according to vehicle speed, steering angle, steering speed and engine speed.) |
|
Power steering back-up control | The PPS warning light illuminates. | U0129 [Power steering ECU assembly] |
| Steering Wheel Angle Information Input (Controls solenoid current (VFC solenoid) according to vehicle speed, steering angle, steering speed and engine speed.) |
|
Power steering back-up control | The PPS warning light illuminates. | U0126 [Power steering ECU assembly] |
| Engine Speed Information Input (Controls solenoid current (VFC solenoid) according to vehicle speed, steering angle, steering speed and engine speed.) |
|
Power steering back-up control | The PPS warning light illuminates. | U0100 [Power steering ECU assembly] |
| L4 Status Signal (Controls solenoid current according to the vehicle speed and L4 status signal) |
|
Normal control | Nothing | - |
| Drive Mode Select Information (Controls solenoid current according to drive mode switch information.) |
|
The previous values are maintained. | Nothing | - |
| Customization Information (Controls solenoid current to normal or sport mode via customization settings.) |
|
The previous values are maintained. | Nothing | - |
| VGRS Data Information (Controls solenoid current according to VGRS information.) |
|
|
The PPS warning light illuminates. | U0130 [Power steering ECU assembly] |
| Warning Light Information (Controls PPS warning light illumination.) |
|
The PPS warning light illuminates. | The PPS warning light illuminates. | - |
| Power Back Door (Driver Seat Operation Switch Operation) (Automatically operates (opens/closes) the power back door according to driver seat operation switch operation.) |
|
|
|
Power back door unit assembly (power back door ECU) |
| Power Back Door (Wireless Switch Operation)
|
|
|
|
Power back door unit assembly (power back door ECU) |
| Power Back Door (Handle Switch Operation) (Operates (releases) the back door pop-up according to operation of the smart outside handle switch.) |
|
Release operations are unavailable. |
|
Power back door unit assembly (power back door ECU) |
| Power Back Door (Hazard Answer Back) (Flashes the hazard lights when the power back door starts operating.) |
|
|
|
U0142 Power back door unit assembly (power back door ECU) |
| Power Back Door (Buzzer Answer Back) (Sounds the buzzer when the power back door starts operating.) |
|
The buzzer answer back is delayed (when the wireless one motion function is operating). | When the wireless one motion function is operating, the buzzer answer back timing is delayed. | U0142 Power back door unit assembly (power back door ECU) |
| Tailgate Closer Start Buzzer (Sounds the power back door buzzer before the tailgate closer operates.) |
|
When the tailgate closer is operating, the buzzer cannot sound. | When the tailgate closer is operating, the buzzer cannot sound. | U0141 Power back door unit assembly (power back door ECU) |
| Rear Wiper Function (Performs low-speed operation, washer-linked operation, intermittent operation and reverse-linked control for the rear wipers.) |
|
Rear wiper operation is possible regardless of whether the upper door is open or closed. | Rear wiper operation is possible regardless of whether the upper door is open or closed. | - |
| Reverse-linked Rear Wiper Function (Performs rear wiper reverse-linked control.) |
|
Even if the shift lever is moved to R, the reverse-linked rear wiper does not operate. | Even if the shift lever is moved to R, the reverse-linked rear wiper does not operate. | - |
| Lower Door Closer Function (Fully closes the rear lower door when the door was closed (close operation) and releases the latch when the door is opened from the fully closed position (release operation).) |
|
Even if a release operation is performed, the closer release does not operate and the lower door latch does not release. | Even if a release operation is performed, the closer release does not operate and the lower door latch does not release. | - |
| Lower Closer Operation Buzzer Sounding Function (Sounds the buzzer when a full close operation is performed with the rear lower door closed.) |
|
Nothing | When the tailgate closer is operating, the buzzer cannot sound. | - |
| Inside Handle Illumination Function (Performs fade-in or fade-out control when the inside handle illumination is illuminated, turned off or dimmed.) |
|
The inside handle illumination does not illuminate or dim. | The inside handle illumination does not illuminate or dim. | - |
| Step Illumination Function (Performs fade-in or fade-out control when the step illumination is illuminated or turned off.) |
|
The step illumination does not illuminate. | The step illumination does not illuminate. | - |
| Washer Nozzle Heater Function (Turns the washer nozzle heater on in low temperatures to prevent freezing.) |
|
Maintains the on/off condition of the washer nozzle heater (maintains the last valid state before communication stop occurred). | Maintains the on/off condition of the washer nozzle heater (maintains the last valid state before communication stop occurred). | - |
| 4WD Switching Control |
|
|
|
(4WD control ECU) |
| Air Conditioning Control (Detects passengers.) |
|
Performs control assuming passenger seat unoccupied. | Nothing | U0151 (Air conditioning amplifier assembly) |
| Air Conditioning Control (Controls the inlets and tunnel recirculation mode.) |
|
Does not detect tunnels or automatically switch the recirculation mode. | Nothing | - |
| Air Conditioning Control (Operates the air conditioning from the navigation screen.) |
|
Does not allow operation of the air conditioning from the navigation screen. | Even if the air conditioning screen displayed on the navigation screen is operated, the system does not respond. | U0163 (Air conditioning amplifier assembly) |
| Air Conditioning Control (Stores DTC information.) |
|
Does not store the trip counter and time counter as fixed values. | Nothing | - |
| Air Conditioning Control (Controls indicator dimming.) |
|
Maintains the last valid state. | The air conditioning panel illumination does not automatically switch between dimmed and not dimmed. | - |
| Air Conditioning Control (Controls the PTC heater.) |
|
Maintains the last valid state. | Nothing | - |
| Air Conditioning Control (Performs destination, LH and RH judgment control.) |
|
Maintains the last valid state. | Nothing | U0142 (Air conditioning amplifier assembly) |
| Air Conditioning Control (Performs correction based on sunlight amount.) |
|
Performs control without correcting based on sunlight amount. | Nothing | - |
| Air Conditioning Control (Engine model judgment, engine speed detection and engine coolant temperature.) |
|
|
Nothing | U0100 (Air conditioning amplifier assembly) |
| Air Conditioning Control (Controls the PTC heater, viscous heater, simple electrical load and EFD detection.) |
|
|
Nothing | U0131 (Air conditioning amplifier assembly) |
| Air Conditioning Control (Performs vehicle speed compensation control.) |
|
Performs control with vehicle speed as 0 km/h (0 mph). | Nothing | U0155 (Air conditioning amplifier assembly) |
| Air Conditioning Control (Supports the remote engine start function.) |
|
Performs control with vehicle as stopped. | Nothing | - |
| Air Conditioning Control (Air conditioning ECO control/customization-linked.) |
|
|
Nothing | - |
| Vehicle Speed Display (Displays the speedometer.) |
|
Signal is considered to be 0. |
|
U0129 (Combination meter assembly) |
| Tachometer (Displays the tachometer.) |
|
Signal is considered to be 0. |
|
U0100 (Combination meter assembly) |
| Fuel Gauge
|
|
Signal is considered to be 0. |
|
(Combination meter assembly) |
| Coolant Temperature Gauge (Displays the coolant temperature gauge.) |
|
Signal is considered to be 0. | Sets the needle of the engine coolant temperature gauge at the C mark or below. | - |
| Oil Pressure Gauge (Displays the oil pressure.) |
|
Signal is considered to be 0. | Sets the needle of the oil pressure gauge at the L mark or below. | U0100 (Combination meter assembly) |
| ODO/TRIP Meter (Calculates the ODO/TRIP values.) |
|
Signal is considered to be 0. | The last displayed value remains. | U0129 (Combination meter assembly) |
| A/T Reverse Buzzer (Sounds the reverse buzzer.) |
|
Signal is considered to be 0. | A/T reverse buzzer does not sound. | U0100 (Combination meter assembly) |
| Seat Belt Warning
|
|
Signal is considered to be 0. |
|
(Combination meter assembly) |
| Brake Warning
|
|
|
The brake warning light illuminates. | U0129 (Combination meter assembly) |
| Ajar Warning
|
|
|
|
U0129 (Combination meter assembly) |
| PPS Warning (Turns the PPS warning light on and off.) |
|
Signal is considered to be "Active". | The PPS warning light illuminates. | U0131 (Combination meter assembly) |
| Lane Departure Alert (Displays and hides lane departure alerts.) |
|
Signal is considered to be "Active". | A malfunction notification message is displayed. | U023A (Combination meter assembly) |
| Pre-collision (Displays and hides the pre-collision function.) |
|
Signal is considered to be "Active". | A malfunction notification message is displayed. | U1104 (Combination meter assembly) |
| Brake Override
|
|
Signal is considered to be "Active". |
|
- |
| Driver Monitor (Displays and hides the driver monitor.) |
|
Signal is considered to be 0. | The drive monitor stops calculating. |
(Combination meter assembly) |
| Soft Switch |
|
Signal is considered to be "Active". | The soft switch is not displayed. | U023A (Combination meter assembly) |
| Multi-media-linked |
|
While the ignition switch is ON, the current state is maintained. | Nothing | U0163 (Combination meter assembly) |