CAN COMMUNICATION SYSTEM(for RHD with Central Gateway ECU) FAIL-SAFE CHART


  1. FAIL-SAFE FUNCTION


    1. When communication fails in any of the CAN bus wires (communication wires), a fail-safe function(s) operates. The fail-safe function that is specified for each system operates to prevent those systems from malfunctioning.

    2. Effects on each system when communication is impossible (for further details, see the pages for each system).

      Function

      1. Control Master

      2. System Related

      3. Control Actuator

      		 Behavior during CAN Failure
      Vehicle Behavior Indicator and Buzzer Diagnostic Trouble Code

      Electrical Load Control

      (Performs idle up according to the electrical load.)

      1. ECM

      2. Main body ECU (multiplex network body ECU), Air conditioning amplifier assembly, Power steering ECU assembly

      3. ECM

      		 Idle up according to the electrical load is not performed. The idling speed changes. -

      Air Conditioning-linked Control

      (Performs idle up according to the compressor load. Performs air conditioning cut control.)

      1. ECM

      2. Air conditioning amplifier assembly

      3. Air conditioning amplifier assembly

      		 Air conditioning-linked control does not operate (cannot perform idle up). Air conditioning does not operate. -

      PTC Heater

      (Performs idle up according to requests from the PTC heater [including coolant heater] or heater system.)

      1. ECM

      2. Air conditioning amplifier assembly

      3. ECM

      		 The PTC heater does not operate (permission is not granted).

        When there is a transmission stop or when the bus is continuously detected:

      • The PTC heater does not operate.


        When there is a reception stop:

      • The idling speed changes.

      • Heater performance becomes worse.

      • The PTC heater does not operate.

      		 -

      Eco-drive Indicator

      (Displays information to the driver to encourage eco-driving.)

      1. ECM

      2. -

      3. Combination meter assembly

      		 Nothing No information is displayed. -

      Integrated Control

      (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.)

      1. ECM

      2. Brake actuator assembly (skid control ECU), Power steering ECU assembly, Spiral with sensor cable sub-assembly (steering angle sensor)

      3. ECM

      		 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. -

      ECT System Indicator

      (Displays shift, switch and mode information to the meter.)

      1. ECM

      2. Main body ECU (multiplex network body ECU)

      3. Combination meter assembly

      		 Nothing ECT system indicators do not illuminate. -

      Cruise Control

      (Adjusts the engine throttle valve opening amount automatically to control the vehicle.)

      1. ECM

      2. Brake actuator assembly (skid control ECU), Combination meter assembly

      3. ECM

      		 Cruise control does not operate.

        w/ Multi-information Display

      • Displays messages on the multi-information display.

      • The cruise indicator do not illuminate.


        w/o Multi-information Display

      • The cruise indicator illuminate.

      		 U0122

      Eco-run Control

      (Performs engine starting and stopping using eco-run control.)

      1. ECM

      2. Engine stop and start ECU

      3. Engine stop and start ECU

      		 Eco-run control is prohibited. Eco-run control is prohibited. U1103

      Air Conditioner


      • The idle up engine speed, etc. is calibrated.

      • Adjusts the air temperature, airflow mode and airflow volume according to the engine coolant temperature.

      • Engine coolant temperature map calibration and compressor judgment value switching based on engine type.

      1. Air conditioning amplifier assembly

      2. ECM

      3. -

      • When there is a communication stop from the first time the ignition switch is turned to ON: Control is performed with the coolant temperature data set at the default value (80°C [176°F]).

      • When there is a communication stop while the ignition switch is ON: Maintains previous values.

      • When the ignition switch is not ON: Nothing

      		 If a communication stop occurs while the engine coolant temperature is rising, the airflow amount does not rise due to warm up control. -

      • When there is a communication stop from the first time +B is On and there is no DTF data: Control is performed with the engine type set at the default value.

      • When there is a communication stop in a situation other than described above: Maintains previous values.

      • When the ignition switch is not ON: Nothing

      		 When the AUTO SW is depressed, the compressor does not turn ON, or the compressor turns ON when it should not. U0100

      Compressor Control

      (Determines whether the compressor is locked according to NE.)

      1. Air conditioning amplifier assembly

      2. ECM

      3. -

      • When the ignition switch is ON: Control is performed with the default value (0 rpm).

      • When the ignition switch is not ON: Nothing

      		 The number of lines that turn ON by the PTC relay does not increase. -

      Simple Load Control

      (Limits simple electrical load control according to the load control level.)

      1. Air conditioning amplifier assembly

      2. Power steering ECU assembly

      3. -

      • When the ignition switch is ON: Maintains previous values (there is no load control during a reset).

      • When the ignition switch is not ON: Nothing

      		 The DEF relay and PTC relay do not turn ON. U0131

      Destination Determination Control

      (Switches air conditioning control pattern according to destination information.)

      1. Air conditioning amplifier assembly

      2. Main body ECU (multiplex network body ECU)

      3. -

      • When the ignition switch is ON: Maintains previous values.

      • When the ignition switch is not ON: Nothing

      		 The set temperature, unit, and central value on the panel cannot be changed. U0142

      Outside Temperature Compensation Control

      (Changes the air conditioning system operation state and adjusts the outside temperature display value according to the vehicle information.)

      1. Air conditioning amplifier assembly

      2. Combination meter assembly

      3. -

      • When the ignition switch is ON: Control is performed with the vehicle speed set at the default value (0 km/h [0 mph]).

      • When the ignition switch is not ON: Nothing

      • When the ignition switch is ON:


        • The reliability of the outside temperature value shown decreases.

        • The system is not able to adjust the air conditioning airflow volume correctly.

      • When the ignition switch is not ON: Nothing

      		 U0155

      Door Lock

      (Operates the lock and unlock [the key-linked function, key lock-in prevention function, etc.].)

      1. Main body ECU (multiplex network body ECU)

      2. ECM, Combination meter assembly Airbag sensor assembly

      3. Main body ECU (multiplex network body ECU)

      • When the ignition switch is ON: Maintains previous values.

      • When the ignition switch is off: The key-linked operation is permitted.

      		 Nothing U0155

      Automatic Dimming of Display

      (Controls the display dimming.)

      1. Main body ECU (multiplex network body ECU)

      2. Combination meter assembly

      3. Main body ECU (multiplex network body ECU)

      		 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

      Illumination

      (Performs illumination control.)

      1. Main body ECU (multiplex network body ECU)

      2. Certification ECU (smart key ECU assembly)

      3. Main body ECU (multiplex network body ECU)

      		 The dome light is turned off. The dome light does not turn off immediately after exiting the vehicle. U0327

      Equipment Related

      (Controls gateway between the BERKES equipment and CAN.)

      1. Main body ECU (multiplex network body ECU)

      2. Combination meter assembly, ECM, Air conditioning amplifier assembly

      3. Air conditioning amplifier assembly

      		 Sends an initial communication value to the BERKES. The remote engine start does not operate.

      • U0100

      • U0101

      • U0155

      • U0164

      Diagnostic/C-BEST

      (Diagnostic phase 4 communication.)

      1. -

      2. All ECUs connected to CAN

      3. Main body ECU (multiplex network body ECU)

      		 Exits diagnostic mode. Nothing -

      Smart/Wireless

      (Smart/wireless control)

      1. Certification ECU (smart key ECU assembly)

      2. Main body ECU (multiplex network body ECU)

      3. Certification ECU (smart key ECU assembly)

      		 Entry lock/unlock control not possible. Nothing U0327

      Lighting Control

      (Performs DRL control)

      1. Main body ECU (multiplex network body ECU)

      2. ECM

      3. Main body ECU (multiplex network body ECU)

      		 Daytime running light control is not performed. Nothing U0100

      Back Door Opener

      (Performs back door opener control and power back door one motion open control)

      1. Main body ECU (multiplex network body ECU)

      2. Multiplex network door ECU

      3. Main body ECU (multiplex network body ECU)

      		 Back door opener control is prohibited. Nothing U0155

      Pre-air Conditioner

      (System which lowers the cabin temperature when the air conditioning is operated before entering the vehicle.)

      1. Main body ECU (multiplex network body ECU)

      2. Air conditioning amplifier assembly

      3. Air conditioning amplifier assembly

      		 Pre-air Conditioner operation is prohibited. Nothing U0164

      Tire Pressure Monitor Sensor

      (Monitors the tire pressure and meter speed, etc. and operates the meter indicators and multi-information display [gateway between BERKES and CAN].)

      1. Main body ECU (multiplex network body ECU)

      2. Combination meter assembly

      3. Combination meter assembly

      		 Sends an initial communication value to the BERKES. The tire pressure monitor sensor indicator in the combination meter assembly blinks for 1 minute and then stays illuminated. U0155

      Entry Beam

      (Detects oncoming traffic, vehicles ahead, street lights, etc. using an onboard sensor and automatically turns the high beam lights on and off.)

      1. Main body ECU (multiplex network body ECU)

      2. Forward recognition camera

      3. Main body ECU (multiplex network body ECU)

      		 The system does not operate (the indicator in the meter blinks). The indicator in the meter blinks. U0182

      Air Conditioning Control

      (Controls the selecting of the registers, temperature adjustment, etc. according to remote touch operation.)

      1. Radio and display receiver assembly, Navigation receiver assembly

      2. Air conditioning amplifier assembly

      3. -

      • The air conditioning related indicators are turned off.

      • If the set air temperature is displayed on an external display device, the system clears the set air temperature display.

      • Disables the functions used to operate the air conditioning system.

      		 Displays messages on the multi-information display.

      • U0073

      • U0164

      Clearance Sonar Settings/Notification

      (Controls the settings for the clearance sonar screen notifications which are set by remote touch operation, displays the sonar status.)

      1. Radio and display receiver assembly, Navigation receiver assembly

      2. Clearance warning ECU assembly, ECM

      3. -

      • If a communication stop occurs while the clearance sonar settings screen is displayed, the settings screen is cleared.

      • If a communication stop occurs while the clearance sonar sensor screen is displayed, the sensor screen is cleared.

      • The "Intuitive Parking Assist" icon displayed on the vehicle settings screen is cleared.

      • Cannot switch to the camera screen (clearance sonar screen does not display on the camera screen).

      • U0073

      • U0100

      • U1110

      Eco Navigation Display

      (Displays the average fuel consumption history and a graph indicating the fuel consumption in 1 minute intervals.)

      1. Radio and display receiver assembly, Navigation receiver assembly

      2. ECM, Combination meter assembly, Brake actuator assembly (skid control ECU)

      3. -

      • The fuel consumption per minute display update on the eco navigation screen (fuel consumption per minute screen) stops (the fuel consumption per minute history graph is not cleared).

      • Stops updating the average fuel consumption history on the eco navigation (eco drive screen).

      • If the distance to empty is being displayed on the eco navigation (eco drive screen), the value displayed is cleared due to a distance to empty data communication stop.

      • The 1 minute fuel consumption graph on the eco navigation (eco drive) display is not updated for 1 minute or more.

      • The most recent value for the fuel consumption interval graph on the eco navigation (eco drive) screen is cleared.

      • The numbers of the distance to empty displayed on the fuel consumption screen of the eco navigation (eco drive) display are cleared.

      • U0100

      • U0129

      • U0155

      Destination Determination

      (Determines the destination of the vehicle and selects the display language, time zone, etc. based on destination symbols, destination package information, etc.)

      1. Radio and display receiver assembly, Navigation receiver assembly

      2. Main body ECU (multiplex network body ECU)

      3. -

      		 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

      Vehicle Customize Function

      (Changes the behavior and control parameters of various functions (illumination lighting time, etc.) according to the user operation via the screen.)

      1. Radio and display receiver assembly, Navigation receiver assembly

      2. Air conditioning amplifier assembly, Certification ECU (smart key ECU assembly), Main body ECU (multiplex network body ECU), Position control ECU and switch assembly

      3. -

      • When a remote communication usage application is performed (customize or remote diagnosis), the information is processed regardless of whether the main body ECU (multiplex network body ECU) has permitted or prohibited remote communication.

      • 3 retries are performed (including the first time).

      		 The customize options for items related to the ACN, BDB, IDT and DST ECU are not displayed or the settings cannot be saved.

      • U0073

      • B15F5

      • B15F6

      • B15F7

      • B15F8

      HUD Display Function

      (Displays the navigation intersection guide information on the meter or HUD device.)

      1. Combination meter assembly

      2. Radio and display receiver assembly, Navigation receiver assembly

      3. -

      		 Nothing Nothing U0073

      Time Stamp Function

      (Matches the relative time from the main body ECU with the absolute time acquired from the GPS.)

      1. Main body ECU (multiplex network body ECU)

      2. Main body ECU (multiplex network body ECU)

      3. -

      		 Nothing Nothing

      • U0073

      • U0140

      Smart Camera Function

      (Function which displays estimated course lines, width extension lines and distance guide lines on the image from the color rear camera when the vehicle is driven in reverse.)

      1. Radio and display receiver assembly, Navigation receiver assembly

      2. ECM, Television camera assembly

      3. -

      		 When a malfunction occurs while the camera screen is displayed, the camera screen continues to display. The camera screen continues to display. -

      Meter-linked Function

      (Changes display based on customization information set through the meter. Outputs the customization information set in the system.)

      1. Radio and display receiver assembly, Navigation receiver assembly

      2. Combination meter assembly

      3. -

      		 Maintains the last valid state. Nothing -

      Information Sound Adjustment Function

      (Receives flags from the driving support ECU to operate the alarm, and limits or mutes multimedia audio while the alarm is in operation.)

      1. Radio and display receiver assembly, Navigation receiver assembly

      2. Driving support ECU assembly, Forward recognition camera

      3. -

      • Audio mute is canceled.

      • Audio limitation is canceled.

      		 Nothing -

      Timestamp

      (Stores the time when a DTC is stored for confirmation.)

      1. Power steering ECU assembly

      2. Main body ECU (multiplex network body ECU)

      3. Power steering ECU assembly

      		 Nothing Nothing -

      Assist Map Selection

      (Selects the assist map according to the destination information, drivetrain [2WD or 4WD], engine type, etc.)

      1. Power steering ECU assembly

      2. ECM

      3. -

      		 Nothing Nothing -

      DTC Output

      (When the TC signal is on, DTC information is sent according to the polling from meter ECU.)

      1. Power steering ECU assembly, Combination meter assembly

      2. Power steering ECU assembly, Combination meter assembly

      3. Power steering ECU assembly, Combination meter assembly

      		 Nothing Nothing -

      Steering Assist Calculation

      (Changes the assist force according to the vehicle speed.)

      1. Power steering ECU assembly

      2. ECM, Brake actuator assembly (skid control ECU)

      3. Power steering ECU assembly

      • Even if the engine starts, steering assist does not start (steering assist starts when the vehicle speed is input).

      • As the vehicle speed cannot be determined, control continues with the vehicle speed set at 140 km/h (87 mph).

      		 The EPS warning light illuminates.

      • U0100

      • U0129

      αB Control

      (Performs assist to prevent sliding sideways.)

      1. Power steering ECU assembly

      2. Brake actuator assembly (skid control ECU)

      3. Power steering ECU assembly

      		 α-B control processing is stopped. Nothing -

      Simple Load Control

      (Determines the current power supply and load status, and sends commands to limit control.)

      1. Air conditioning amplifier assembly

      2. Power steering ECU assembly

      3. Air conditioning amplifier assembly

      		 Nothing Nothing -

      Steering Assist Calculation

      (Estimates the steering angle neutral point from the vehicle speed and resolver signal to determine the absolute steering angle.)

      1. Power steering ECU assembly

      2. Spiral with sensor cable sub-assembly (steering angle sensor)

      3. Power steering ECU assembly

      		 Functions that use the estimated steering angle are turned off (after estimation completes due to driving in a straight line, related functions are turned on). Nothing -

      Enter Test Mode

      (Receives the test mode signal and enters test mode.)

      1. Power steering ECU assembly

      2. ECM

      3. Power steering ECU assembly

      		 Nothing Nothing -

      Idle Up

      (When a large assist current is created, a request to perform idle up is sent to the ECM in order to prevent the battery voltage from dropping.)

      1. ECM

      2. Power steering ECU assembly

      3. ECM

      		 Nothing Nothing -

      Warning Light Illumination

      (When the fail-safe function operates, a request to turn on the electronic power steering light is sent to the combination meter.)

      1. Combination meter assembly

      2. Power steering ECU assembly

      3. Combination meter assembly

      		 Nothing Nothing -

      Lane Departure Alert System

      (Calculates the current to be used for assist according to the commanded torque value from the forward recognition camera, and then operates the motor.)

      1. Power steering ECU assembly

      2. Forward recognition camera

      3. Power steering ECU assembly

      		 Lane departure alert system control processing is stopped. Nothing -

      Microcomputer Preset Position System

      (Controls the memorized seat position according to vehicle information [power source mode, shift position, door, vehicle speed] and switch information [memory switch].)

      1. Position control ECU and switch assembly

      2. ECM, Main body ECU (multiplex network body ECU), Combination meter assembly

      3. -

      • The memory system does not operate.

      • The memory call function does not operate.

      • The return away function does not operate.

      • The memory system does not operate.

      • The memory call function does not operate.

      • The return away function does not operate.

      		 -

      Blind Spot Monitor

      (Warns the driver when the system detects a vehicle in the blind spots of the outer mirrors.)

      1. Blind spot monitor sensor LH

      2. ECM, Brake actuator assembly (skid control ECU), Spiral with sensor cable sub-assembly (steering angle sensor), Main body ECU (multiplex network body ECU)

      3. Blind spot monitor sensor LH

      		 Maintains previous values. Blind spot monitor system warning displayed.

      • U0100

      • U0126

      • U0129

      • U0140

      Steering Sensor

      (Detects steering wheel angle)

      1. Spiral with sensor cable sub-assembly (steering angle sensor)

      2. Brake actuator assembly (skid control ECU)

      3. -

      		 Sends steering sensor data information every 0.012 seconds. Nothing -

      Power Back Door Open/Close Function


      • Automatically opens the back door according to the operation conditions (power source mode, shift position, vehicle speed, lock position) and switch operation (driver seat/wireless).

      • Automatically closes the back door according to switch operation (driver seat/wireless/back door).

      1. Multiplex network door ECU

      2. ECM, Main body ECU (multiplex network body ECU), Combination meter assembly, Certification ECU (smart key ECU assembly), Brake actuator assembly (skid control ECU)

      3. -

      • Does not perform the automatic open and close operation.

      • The function cannot reverse operation during the automatic operation.

      • There is no answer back with the buzzer or hazard warning lights when the automatic back door operation starts.

      • Does not perform the automatic open and close operation.

      • The wireless one motion function does not operate.

      • Stopping the automatic open or closing operation is not possible.

      • The function cannot reverse operation during the closer operation.

      • U0100

      • U0122

      • U0142

      • U0155

      • U1117

      Wireless One Motion Function

      (If a wireless switch operation is performed with the doors locked, the back door is automatically opened.)

      1. Multiplex network door ECU

      2. ECM, Main body ECU (multiplex network body ECU), Combination meter assembly, Brake actuator assembly (skid control ECU)

      3. -

      		 The wireless one motion function does not operate. The wireless one motion function does not operate.

      • U0100

      • U0122

      • U0142

      • U0155

      • U1117

      Back Door Opener Function

      (Opens the back door according to operation conditions [power source mode, vehicle speed, lock position] and the back door handle switch.)

      1. Multiplex network door ECU

      2. Main body ECU (multiplex network body ECU), Combination meter assembly, Certification ECU (smart key ECU assembly)

      3. -

      		 The back door opener does not operate. The back door opener does not operate.

      • U0142

      • U0155

      • U1117

      Back Door Closer Function

      (Completely closes the back door when it is ajar.)

      1. Multiplex network door ECU

      2. Main body ECU (multiplex network body ECU), Combination meter assembly, Certification ECU (smart key ECU assembly)

      3. -

      		 The function cannot reverse operation during the closer operation. The function cannot reverse operation during the closer operation.

      • U0142

      • U0155

      • U1117

      Courtesy Switch Signal Substitution Output Function

      (Sends a back door courtesy switch signal through the CAN bus.)

      1. Multiplex network door ECU

      2. Main body ECU (multiplex network body ECU)

      3. -

      		 Nothing When the back door opens, the indicator in the meter indicating the door is open does not illuminate -

      Lock Permission Signal Output Function during Power Back Door Closing Operation

      (Sends a power back door closing operation signal to the CAN bus in order to allow a wireless door lock during the power back door closing operation.)

      1. Multiplex network door ECU

      2. Main body ECU (multiplex network body ECU), Certification ECU (smart key ECU assembly)

      3. -

      		 Nothing Disallows the wireless lock during the power back door closing operation. -

      Combination Meter Customization

      (Customization can be performed using the combination meter.)

      1. Multiplex network door ECU

      2. Combination meter assembly

      3. -

      		 Maintains the last valid state before communication stop. Customization cannot be performed using the combination meter. U0155

      ATC-4WD System

      (Controls the driving force distribution between the front and rear wheels according to driving conditions.)

      1. 4WD ECU assembly

      2. ECM, Brake actuator assembly (skid control ECU), Main body ECU (multiplex network body ECU), Spiral with sensor cable sub-assembly (steering angle sensor), Air conditioning amplifier assembly

      3. 4WD ECU assembly

        When transmission is lost:

      • 4WD control is prohibited (the vehicle behaves the same as a 2WD vehicle).


        When there is a reception stop:

      • When the ECM or steering angle sensor is malfunctioning: Control continues using default values.

      • When the skid control ECU is malfunctioning:


        • Control is prohibited (the vehicle behaves the same as a 2WD vehicle).

        • Yaw rate feedback control is prohibited (conventional control continues).

        When there is a transmission stop or when the bus is continuously detected:

      • 4WD indicator light blinks.


        When there is a reception stop or a cyclic malfunction:

      • 4WD indicator light illuminates.

      • U0073

      • U0100

      • U0126

      • U0129

      ATC-4WD System

      (Controls the driving force distribution between the front and rear wheels according to driving conditions.)

      1. 4WD ECU assembly

      2. ECM, Brake actuator assembly (skid control ECU), Main body ECU (multiplex network body ECU), Spiral with sensor cable sub-assembly (steering angle sensor), Air conditioning amplifier assembly

      3. 4WD ECU assembly

        During a cyclic malfunction:

      • During a steering angle sensor malfunction:


        • Control continues by maintaining previous values.

        • Control continues using default values.

      • During an ECM malfunction: Control continues using default values.

      • When the skid control ECU is malfunctioning:


        • Control continues using the default values (yaw rate feedback control).

        • Control continues, but the feedback of the speed difference between the front and rear wheels is prohibited.

      • When the air conditioning amplifier assembly or main body ECU is malfunctioning: Control continues using default values.

        When there is a transmission stop or when the bus is continuously detected:

      • 4WD indicator light blinks.


        When there is a reception stop or a cyclic malfunction:

      • 4WD indicator light illuminates.

      • U0073

      • U0100

      • U0126

      • U0129

      ATC-4WD System

      (Controls the driving force distribution between the front and rear wheels according to driving conditions.)

      1. 4WD ECU assembly

      2. ECM, Brake actuator assembly (skid control ECU), Main body ECU (multiplex network body ECU), Spiral with sensor cable sub-assembly (steering angle sensor), Air conditioning amplifier assembly

      3. 4WD ECU assembly

        When a continuous bus is detected:

      • Control is prohibited (the vehicle behaves the same as a 2WD vehicle).

        When there is a transmission stop or when the bus is continuously detected:

      • 4WD indicator light blinks.

      • U0073

      • U0100

      • U0126

      • U0129

      Vehicle Speed Display

      (Operates the speedometer according to the vehicle speed signals from the skid control ECU.)

      1. Combination meter assembly

      2. Brake actuator assembly (skid control ECU)

      3. -

      		 Signal is considered to be "0".

      • Displays 0 km/h (0 mph) in the speedometer.

      • The drive monitor stops calculating.

      		 U0129

      Tachometer

      (Displays the tachometer.)

      1. Combination meter assembly

      2. ECM

      3. -

      		 Signal is considered to be "0".

      • Displays 0 rpm in the tachometer.

      • The drive monitor stops calculating.

      		 U0100

      Airbag

      (Turns the airbag warning light on and off.)

      1. Combination meter assembly

      2. Airbag sensor assembly

      3. -

      		 Signal is considered to be "Active". The airbag warning light illuminates. U0151

      EPS Warning Light

      (Turns the EPS warning light on and off.)

      1. Combination meter assembly

      2. Power steering ECU assembly

      3. -

      		 Signal is considered to be "Active". The EPS warning light illuminates. U0131

      SLIP Indicator Light

      (Turns the SLIP indicator light on and off.)

      1. Combination meter assembly

      2. Brake actuator assembly (skid control ECU)

      3. -

      		 Signal is considered to be "Active". The SLIP indicator illuminates. -

      ECT/ENG System Display

      (Displays the coolant temperature.)

      1. Combination meter assembly

      2. ECM

      3. -

      		 Signal is considered to be "0". The needle of the engine coolant temperature gauge is at the C mark or below. -

      Anti-lock Brake System Control

      (Prevents the wheels from locking when suddenly stopping.)

      1. Brake actuator assembly (skid control ECU)

      2. Airbag sensor assembly

      3. Brake actuator assembly (skid control ECU)

      • During control: After ending backup control (which stabilizes the vehicle), the system changes to normal braking and prohibits this control.

      • Not during control: Control cannot begin.

      • The ABS warning light illuminates.

      • The SLIP indicator illuminates.

      • U0073

      • U0124

      Vehicle Stability Control/Traction Control/Vehicle Dynamics Integrated Management Control

      (Suppresses vehicle instability, such as drift when cornering and wheel slippage when accelerating. During vehicle dynamics integrated management control, vehicle integrated control which includes electronic steering control is performed.)

      1. Brake actuator assembly (skid control ECU)

      2. ECM, Airbag sensor assembly, Spiral with sensor cable sub-assembly (steering angle sensor)

      3. Brake actuator assembly (skid control ECU)

      • During control: After ending backup control (which stabilizes the vehicle), the system changes to normal braking and prohibits this control.

      • Not during control: Control cannot begin.

      • The ABS warning light illuminates.

      • The SLIP indicator illuminates.

      • U0073

      • U0100

      • U0124

      • U0126

      Hill-start Assist Control 3

      (Maintains the brake fluid pressure for 2 seconds when the brake pedal is depressed further.)

      1. Brake actuator assembly (skid control ECU)

      2. ECM, Airbag sensor assembly, Spiral with sensor cable sub-assembly (steering angle sensor)

      3. Brake actuator assembly (skid control ECU)

      • During control: After ending backup control (which stabilizes the vehicle), the system changes to normal braking and prohibits this control.

      • Not during control: Control cannot begin.

      • The ABS warning light illuminates.

      • The SLIP indicator illuminates.

      • U0073

      • U0100

      • U0124

      • U0126

      Eco Run Hold Control

      (Maintains brake fluid pressure while switching from the brake pedal to the accelerator pedal and restarting the engine. The fluid pressure is maintained for a maximum of 2 seconds. Afterwards, it takes 1 second for the pressure to be released.)

      1. Brake actuator assembly (skid control ECU)

      2. ECM, Airbag sensor assembly, Spiral with sensor cable sub-assembly (steering angle sensor), Engine stop and start ECU

      3. Brake actuator assembly (skid control ECU)

      • During control: After ending backup control (which stabilizes the vehicle), the system changes to normal braking and prohibits this control.

      • Not during control: Control cannot begin.

      • The ABS warning light illuminates.

      • The SLIP indicator illuminates.

      • U0073

      • U0100

      • U0126

      Entry Function


      • Entry lock/unlock and smart back door unlatch

      • Entry warning

      • Entry illumination (Dome light illumination, etc.)

      1. Main body ECU (multiplex network body ECU), Certification ECU (smart key ECU assembly)

      2. Main body ECU (multiplex network body ECU), Certification ECU (smart key ECU assembly)

      3. Main body ECU (multiplex network body ECU), Combination meter assembly

      		 An entry unlock retry is performed.

        When transmission is abnormal:

      • The entry lock/unlock and back door open/unlatch do not operate.

      • The smart access system with push-button start warnings (the key lock-in prevention warning, the leaving with the key warning, key reminder, etc.) and the key lock-in prevention function do not operate.

      • Entry illumination does not operate.


        When there is a reception stop:

      • The smart access system with push-button start warnings (the key lock-in prevention warning, the leaving with the key warning, key reminder, etc.), the ignition switch ON possible display, and the key lock-in prevention function do not operate.

      • The answer back function repeats a maximum of 3 times when an unlock operation is performed. However, this only occurs when the main body ECU (multiplex network body ECU) can receive requests from the certification ECU (smart key ECU assembly).

      • When the ignition switch is ON, the entry lock/unlock and back door unlatch do not operate.

      • U0142

      • U0155

      Entry Function


      • Entry lock/unlock and smart back door unlatch

      • Entry warning

      • Entry illumination (Dome light illumination, etc.)

      1. Certification ECU (smart key ECU assembly)

      2. Engine stop and start ECU

      3. Combination meter assembly

      		 Nothing Nothing U1103

      1. Certification ECU (smart key ECU assembly)

      2. ECM

      3. Combination meter assembly

      		 The previous value is maintained. Incorrect smart access system with push-button start warnings are output. U0100

      Wireless Function

      (Operates the wireless lock/unlock functions, etc.)

      1. Main body ECU (multiplex network body ECU)

      2. Main body ECU (multiplex network body ECU), Certification ECU (smart key ECU assembly)

      3. Main body ECU (multiplex network body ECU)

      		 Nothing Wireless lock/unlock and trunk functions do not operate. -

      Remote Engine Start Function

      (Requests for the immobiliser to be unset in response to data from the remote engine start ECU.)

      1. Main body ECU (multiplex network body ECU)

      2. Main body ECU (multiplex network body ECU), Certification ECU (smart key ECU assembly)

      3. ECM

      		 Nothing The remote engine start does not operate. U0142

      Memory Function

      (Moves the seat to the memorized position when the doors are unlocked using the smart or wireless unlock.)

      1. Main body ECU (multiplex network body ECU)

      2. Main body ECU (multiplex network body ECU), Certification ECU (smart key ECU assembly)

      3. Position control ECU and switch assembly

      		 Nothing The memory recall function does not operate. U0142

      Ignition Switch Illumination Control

      (Operates ignition switch illumination in conjunction with the dome light illumination, etc.)

      1. Certification ECU (smart key ECU assembly)

      2. Main body ECU (multiplex network body ECU), Certification ECU (smart key ECU assembly), Combination meter assembly

      3. Certification ECU (smart key ECU assembly)

      • When the ignition switch letters are illuminated due to the dome light, the illumination turns off.

      • When the DC cut fuse is removed and the ignition switch letters are illuminated due to the panel illumination, the illumination turns off.

      • The previous value is maintained.

      • If the ignition switch letters are not illuminated, they never illuminate.

      • If the ignition switch letters are illuminated due to the panel illumination, the illumination does not turn off.

      • When the ignition switch letters are illuminated due to the dome light, the illumination does not turn off.

      • When the DC cut fuse is removed and the ignition switch letters are illuminated due to the panel illumination, the illumination turns off.

      		 U0142

      TC DTC Output Service

      (While TC = ON is being received from the engine, a DTC is output in response to the request from the combination meter assembly.)

      1. Combination meter assembly

      2. ECM

      3. Airbag sensor assembly

      		 If the TC signal is lost during TC service (TC=ON), the TC is determined to be OFF and TC service ends. Nothing -

      Timestamp

      (Records DTCs and timestamps received from the main body ECU.)

      1. Airbag sensor assembly

      2. Main body ECU (multiplex network body ECU)

      3. -

      		 Changes to a separate count inside the ECU and sets separate count recognition information when it receives a fail value or communication stops. Nothing -

      Collision Detection Signal

      (Notifies the system of a collision in order to perform fuel cut when a vehicle collision occurs.)

      1. ECM

      2. Airbag sensor assembly

      3. -

      		 Nothing Nothing -

      Airbag Warning Light Control

      (Sends airbag warning light illumination information.)

      1. Combination meter assembly

      2. Airbag sensor assembly

      3. -

      		 Nothing Nothing -

      Seat Belt Warning Control

      (Sends information about the passengers in order to turn the seat belt warning on and off.)

      1. Main body ECU (multiplex network body ECU), Combination meter assembly

      2. Airbag sensor assembly

      3. -

      		 Nothing Nothing -

      Trigger Signal/Autonomous Transmission

      (Outputs the yaw rate and acceleration sensor signal.)

      1. Airbag sensor assembly

      2. Brake actuator assembly (skid control ECU)

      3. Brake actuator assembly (skid control ECU)

      		 Sends yaw rate sensor data information. 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.)

      1. Airbag sensor assembly

      2. ECM, Brake actuator assembly (skid control ECU), Spiral with sensor cable sub-assembly (steering angle sensor)

      3. -

      • When there is a communication error, a failure notification is received from the other device, or an invalid value is recorded in the EDR when the communication failure occurs.

      • When there is a periodic problem, the previous value is maintained.

      		 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.)

      1. Airbag sensor assembly

      2. ECM, Brake actuator assembly (skid control ECU), Main body ECU (multiplex network body ECU), Combination meter assembly, Power steering ECU assembly, Spiral with sensor cable sub-assembly (steering angle sensor), Airbag sensor assembly, Driving support ECU assembly, Forward recognition camera

      3. -

      • When there is a communication error, a failure notification is received from the other device, or an invalid value is recorded in the DDR when the communication failure occurs.

      • When there is a periodic problem, the previous value is maintained.

      		 Nothing -

      Parking Assist Monitor

      (Monitors the shift position signal, steering angle signal and vehicle speed, and displays the predicted path guide lines on the screen based on the steering angle when reversing.)

      1. Television camera assembly

      2. Main body ECU (multiplex network body ECU), Spiral with cable sensor sub-assembly (steering angle sensor), Radio and display receiver assembly, Navigation receiver assembly, Clearance warning ECU assembly

      3. -

      		 Parking assist monitor function is prohibited.

      • Predicted path guide lines are not displayed.

      • All guide lines and the clearance sonar icon are not displayed.

      • U0126

      • U0129

      • U0140

      • U0163

      • U1110

      Clearance Sonar Customize

      (Changes the clearance sonar settings when the user operates the display.)

      1. Clearance warning ECU assembly

      2. Radio and display receiver assembly, Navigation receiver assembly, Clearance warning ECU assembly

      3. Clearance warning ECU assembly

      		 Nothing Nothing -

      Shift Position Judgment

      (Receives shift position data which it uses for the clearance sonar detection operation conditions.)

      1. Clearance warning ECU assembly

      2. ECM, Clearance warning ECU assembly

      3. Clearance warning ECU assembly

      		 Changes to an operation state which is used when the shift lever is in P. Nothing U0101

      Vehicle Speed Determination

      (Receives vehicle speed data which it uses for the clearance sonar detection operation conditions.)

      1. Clearance warning ECU assembly

      2. Combination meter assembly, Clearance warning ECU assembly

      3. Clearance warning ECU assembly

      		 Changes to an operation state which is used when the vehicle speed is 20 km/h (12 mph) or higher. Nothing U0155

      Distance Correction

      (Corrects the distance measured by ultrasonic waves using the ambient temperature information.)

      1. Clearance warning ECU assembly

      2. Air conditioning amplifier assembly, Clearance warning ECU assembly

      3. Clearance warning ECU assembly

      		 Changes to an operation state which is used when the ambient temperature is 25°C (68°F). Nothing -

      PKB Judgment

      (For vehicles with a manual transmission, receives PKB information and uses it for the clearance sonar detection operation condition.)

      1. Clearance warning ECU assembly

      2. Main body ECU (multiplex network body ECU), Clearance warning ECU assembly

      3. Clearance warning ECU assembly

      		 When there is a communication stop, PKB is recognized as "ON". Nothing U0142

      Vehicle Information Judgment

      (Judges whether ECUs are present and switches control.)

      1. Clearance warning ECU assembly

      2. ECM, Main body ECU (multiplex network body ECU)

      3. Clearance warning ECU assembly

      • When there is a communication stop after judging the transmission, control is performed according to previous values.

      • When there is a communication stop after turning the ignition switch to ON, the clearance sonar does not operate.

      		 Clearance sonar does not operate. U0100

      Driver Seat Module Switch/Mute Switch Judgment

      (Receives TOYOTA parking assist-sensor system settings from the driver seat module switch/mute switch and uses the information to make changes.)

      1. Clearance warning ECU assembly

      2. Combination meter assembly, Clearance warning ECU assembly

      3. Clearance warning ECU assembly

      		 Operates according to the last condition. Nothing U0155

      Automatic High Beam


      • Controls high beams.

      • Function that recognizes lights in front of the vehicle and automatically operates the high beams.

      1. Forward recognition camera

      2. Brake actuator assembly (skid control ECU), ECM, Main body ECU (multiplex network body ECU), Airbag sensor assembly

      3. Brake actuator assembly (skid control ECU)

      		 Maintains the current conditions. The automatic high beam indicator light blinks. -

      1. Forward recognition camera

      2. Brake actuator assembly (skid control ECU), Spiral with cable sensor sub-assembly (steering angle sensor), Main body ECU (multiplex network body ECU), ECM, Airbag sensor assembly

      3. -

      		 System is stopped. The automatic high beam indicator light blinks.

      • U0100

      • U0123

      • U0126

      • U0129

      Road Sign Assist

      (Recognizes road signs and informs the driver by displaying the road signs on the meter.)

      1. Forward recognition camera

      2. Combination meter assembly, Brake actuator assembly (skid control ECU), ECM, Airbag sensor assembly, Main body ECU (multiplex network body ECU)

      3. -

      		 System is stopped.

      • Road signs do not illuminate.

      • A malfunction message is displayed.

      • U0100

      • U0101

      • U0123

      • U0129

      • U0142

      • U0155

      Lane Departure Alert System (w/ Steering Control)


      • Uses the front camera to recognize the lane markers of the currently traveled lane and uses that information together with vehicle information to perform the following function:


        • When the system determines that the vehicle may deviate from its lane, steering assist is performed to prevent the vehicle from deviating.

      1. Forward recognition camera

      2. Brake actuator assembly (skid control ECU), Spiral with cable sensor sub-assembly (steering angle sensor), Main body ECU (multiplex network body ECU), Combination meter assembly, Power steering ECU assembly, ECM, Airbag sensor assembly, Driving support ECU assembly, Millimeter wave radar sensor assembly

      3. Power steering ECU assembly

      		 System is stopped.

      • The LDA indicator illuminates.

      • A malfunction message is displayed.

      • U0100

      • U0101

      • U0123

      • U0126

      • U0129

      • U0131

      • U0142

      • U0155

      • U0235

      • U023A

      • U1104

      Lane Departure Alert System

      (Function that uses the front camera to recognize the lane markers of the currently traveled lane and uses that information together with vehicle information to judge if the vehicle is wandering and prompt the driver to take a rest.)

      1. Forward recognition camera

      2. Brake actuator assembly (skid control ECU), Spiral with cable sensor sub-assembly (steering angle sensor), Main body ECU (multiplex network body ECU), Combination meter assembly, Power steering ECU assembly, ECM, Airbag sensor assembly, Driving support ECU assembly, Millimeter wave radar sensor assembly

      3. -

      		 System is stopped.

      • The LDA indicator illuminates.

      • A malfunction message is displayed.

      • U0100

      • U0101

      • U0123

      • U0126

      • U0129

      • U0131

      • U0142

      • U0155

      • U0235

      • U023A

      • U1104

      Pre-crash Safety


      • Function that recognizes vehicles and pedestrians and operates the brake.

      • Controls brakes immediately before a collision.

      1. Forward recognition camera

      2. Brake actuator assembly (skid control ECU), Spiral with cable sensor sub-assembly (steering angle sensor), Main body ECU (multiplex network body ECU), ECM, Airbag sensor assembly

      3. -

      		 System is stopped.

      • The PCS indicator illuminates.

      • A malfunction message is displayed.

      • U0100

      • U0123

      • U0129

      • U0142

      1. Driving support ECU assembly

      2. Driving support ECU assembly

      3. Brake actuator assembly (skid control ECU)

      		 Pre-crash brake assist, warning buzzer and Pre-crash brake control is canceled.

      • The PCS indicator illuminates.

      • A malfunction message is displayed.

      • U0235

      • U1104

      1. Driving support ECU assembly

      2. Millimeter wave radar sensor assembly, Forward recognition camera, Brake actuator assembly (skid control ECU), Airbag sensor assembly, Spiral with sensor cable sub-assembly (steering angle sensor), ECM

      3. Brake actuator assembly (skid control ECU)

      		 Pre-crash brake assist, warning buzzer and Pre-crash brake control is canceled.

      • The PCS indicator illuminates.

      • A malfunction message is displayed.

      • U0100

      • U0123

      • U0125

      • U0126

      • U0129

      • U0235

      • U023A

      • U1104

      Dynamic Radar Cruise

      (Accelerates or decelerates the vehicle to maintain the distance to the vehicle ahead.)

      1. Driving support ECU assembly, ECM

      2. Millimeter wave radar sensor assembly, Brake actuator assembly (skid control ECU), Airbag sensor assembly, Spiral with sensor cable sub-assembly (steering angle sensor), Forward recognition camera

      3. ECM, Brake actuator assembly (skid control ECU)

      		 Cruise control does not operate. A malfunction message is displayed.

      • U0100

      • U0125

      • U0126

      • U0129

      • U0235

      • U1104

      Panoramic View Monitor


      • Shows an overhead map along with front, side and rear images on the display.

      • Shows guide lines on the displayed image in tandem with the steering angle.

      • Displays the clearance sonar detection area.

      1. Parking assist ECU

      2. Main body ECU (multiplex network body ECU), ECM, Brake actuator assembly (skid control ECU), Clearance warning ECU assembly

      3. Brake actuator assembly (skid control ECU)

      • If the panoramic view monitor screen is displayed, screen display ends.

      • If the front mode screen is displayed, screen display ends.

      • If the front screen of back mode is displayed, the previously displayed back screen is displayed.

      • If a magnification image is displayed, the magnification image display ends and switches to the overhead image.

      • Panoramic view monitor does not operate.

      • "Guidance unavailable" is displayed on the multi-display.

      • Clearance sonar cooperative control is not displayed.

      • The communication failure mark is displayed on top of the clearance sonar icon.

      • U0073

      • U0100

      • U0126

      • U0129

      • U0140

      • U1110

      Stop and Start System

      (Stops the engine when the vehicle is stopped.)

      1. Engine stop and start ECU

      2. ECM, Brake actuator assembly (skid control ECU), Main body ECU (multiplex network body ECU), Power steering ECU assembly, Air conditioning amplifier assembly, Airbag sensor assembly, Combination meter assembly

      3. ECM

      • During eco-run: Restarts

      • Not during eco-run: Prohibits eco-run

      		 ECO driving indicator light blinks.

      • U0100

      • U0121

      • U0131

      • U0140

      • U0151

      • U0155

      • U0164

      Push Start Function

      (Changes the power source mode automatically based on the push start switch signal and commands the starter to operate when certain conditions are met.)

      1. Certification ECU (smart key ECU assembly)

      2. Main body ECU (multiplex network body ECU), ECM, Brake actuator assembly (skid control ECU), Combination Meter Assembly, Engine stop and start ECU

      3. -

      		 Nothing

      • Does not display the necessary starting operation.

      • The indicator light blinks.

      • U0100

      • U0140

      • U0155

      • U1103

      Starting Control Function

      (Starts the engine when the engine switch is pushed once [cranking hold].)

      1. Certification ECU (smart key ECU assembly)

      2. ECM

      3. -

      		 When there is a CAN communication malfunction, the NE direct line determines that starter turnoff has occurred and cranking is stopped. Nothing U0100