CAN COMMUNICATION SYSTEM FAIL-SAFE CHART


  1. FAIL-SAFE FUNCTION


    1. When communication fails in any of the main wires (communication lines) due to a short circuit or other causes, the fail-safe function, which is specified for each system, operates to prevent the system from malfunctioning.

    2. The table below shows the effects on each system when communication is impossible. For further details, refer to each system.

      System Function

      1. Control Master

      2. System Related

      3. Control Actuator

      		 Fail-safe Function System Behavior Indicator and Buzzer Behavior or User Notification

      Diagnosis Code

      [Diagnosis Code Hold Condition]
      ZR Engine Series

      Electrical Load Control

      (Performs idle up according to the electrical load.)

      1. ECM

      2. Air conditioning amplifier assembly, Main body ECU (instrument panel junction block assembly), Power steering ECU assembly

      3. -

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

      Nothing

      [-]

      Air Conditioning-linked Control

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

      1. ECM

      2. Air conditioning amplifier assembly, Power management control ECU

      3. -

      		 Air conditioning-linked control does not operate. Air conditioning does not operate.

      Nothing

      [-]

      PTC Heater

      (Performs idle up according to requests from the PTC heater or heater system.)

      1. ECM

      2. Air conditioning amplifier assembly,

      3. -

      		 The PTC heater does not operate.

      • The idling speed changes.

      • Heater performance becomes worse.

      Nothing

      [-]

      Charging Control

      (Performs idle up according to charging requests.)

      1. Power management control ECU

      2. Power management control ECU

      3. ECM

      		 Idle up according to charging requests is not performed. Idle up according to charging requests is not performed.

      Nothing

      [-]

      ECT System Indicator

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

      1. ECM

      2. -

      3. Combination meter assembly

      		 ECT system indicators do not illuminate. ECT system indicators do not illuminate.

      Nothing

      [-]

      Cruise Control

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

      1. ECM

      2. Brake actuator assembly (skid control ECU)

      3. Combination meter assembly

      When there is a transmission stop: The cruise indicator turn off.

      When the bus is continuously detected: Cruise control does not operate.

      		 Cruise control does not operate.

      U0129

      [Stored until the code is cleared with the GTS.]

      Eco-drive Indicator

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

      1. ECM

      2. -

      3. Combination meter assembly

      		 No information is displayed. Nothing

      Nothing

      [-]
      1WW Engine Type

      Engine System Indicator Display

      (Estimates whether the oil has deteriorated and displays a request to change the oil.)

      1. ECM

      2. Combination meter assembly

      3. Combination meter assembly

      		 The meter display cannot be cleared.

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


        • The system is unable to inform the user that the oil needs to be replaced.

        • The meter display does not clear.

      • When there is a reception stop: The meter display does not clear.

      Nothing

      [-]

      Electrical Load Control

      (Performs idle up according to the electrical load.)

      1. ECM

      2. Main body ECU (instrument panel junction block assembly), Air conditioning amplifier assembly, Power steering ECU assembly

      3. ECM

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

      Nothing

      [-]

      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: The PTC heater does not operate.

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


        • The idling speed changes.

        • Heater performance becomes worse.

        • The PTC heater does not operate.

      Nothing

      [-]

      Charging Control

      (Performs idle up according to charging requests.)

      1. Power management control ECU

      2. Main body ECU (instrument panel junction block assembly), Air conditioning amplifier assembly

      3. ECM

      • Idle up according to charging requests is not performed.

      • Charging control is not prohibited.

      • Idle up according to charging requests is not performed.

      • The tail lights flicker and the blower airflow volume changes.

      Nothing

      [-]

      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

      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.

      Nothing

      [-]
      1WW Engine Type

      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

      [Stored until the code is cleared with the GTS.]
      Air Conditioning

      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

      		 Nothing

      U0100

      [Stored until the code is cleared with the GTS.]

      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

      		 Nothing

      U0100

      [Stored until the code is cleared with the GTS.]

      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

      		 Nothing

      U0131

      [Stored until the code is cleared with the GTS.]

      Panel Control


      • Controls the air conditioning system operation state and panel switch IND output according to the panel switch operation information.

      • Determines the exhaust gas automatic circulation availability and circulation switching according to the exhaust gas automatic circulation availability information.

      1. Air conditioning amplifier assembly

      2. Radio and display receiver assembly

      3. -

      • When the ignition switch is ON: The panel switch is off and the exhaust gas availability information is maintained.

      • When the ignition switch is not ON: Nothing

      		 Cannot change the operation state of the air conditioning system when the ignition switch is ON.

      U0163

      [Stored until the code is cleared with the GTS.]
      Air Conditioning

      Destination Determination Control

      (Switches the A/C control pattern according to the destination information.)

      1. Air conditioning amplifier assembly

      2. Main body ECU (instrument panel junction block assembly)

      3. -

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

      • When the ignition switch is not ON: Nothing

      		 Nothing

      U0142

      [Stored until the code is cleared with the GTS.]

      Remote Start Control

      (Controls the air conditioning operation state according to remote start information.)

      1. Air conditioning amplifier assembly

      2. Main body ECU (instrument panel junction block assembly)

      3. -

      • When the ignition switch is ON: Remote start control is not performed.

      • When the ignition switch is not ON: Nothing

      • When the ignition switch is ON: the air conditioning system does not begin operation according to the remote start information.

      • When the ignition switch is not ON: Nothing

      Nothing

      [-]

      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

      [Stored until the code is cleared with the GTS.]
      Airbag

      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 -

      Event Data Recorder (12 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. Combination meter assembly

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

      3. Airbag sensor assembly

      • 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 -

      Airbag Warning Light Control

      (Sends airbag warning light illumination information.)

      1. Combination meter assembly

      2. Airbag sensor assembly

      3. -

      		 Nothing 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 -
      Meter/gauge Speedometer

      1. Combination meter assembly

      2. Brake actuator assembly (skid control ECU)

      3. Combination meter assembly

      		 - 0 km/h (0 mph) is displayed.

      U0129

      [Stored until the code is cleared with the GTS.]
      Tachometer

      1. Combination meter assembly

      2. ECM

      3. Combination meter assembly

      		 - 0 rpm is displayed.

      U0100

      [Stored until the code is cleared with the GTS.]
      Engine coolant temperature gauge

      1. Combination meter assembly

      2. ECM

      3. Combination meter assembly

      		 - Engine coolant temperature warning COOL light blinks.

      Nothing

      [-]
      Fuel receiver gauge

      1. Combination meter assembly

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

      3. Combination meter assembly

      		 -

      Control is performed with the following conditions set as below:


      • Shift lever is not in P or N.

      • ST signal is off.

      • Speedometer value is 0 km/h (0 mph).

      Nothing

      [-]
      ODO/TRIP meter

      1. Combination meter assembly

      2. Brake actuator assembly (skid control ECU)

      3. Combination meter assembly

      		 - Calculation stops and the last displayed value remains.

      Nothing

      [-]
      A/T shift indicator

      1. Combination meter assembly

      2. ECM

      3. Combination meter assembly

      		 - Turns off.

      Nothing

      [-]
      BEAM indicator light

      1. Combination meter assembly

      2. Main body ECU (instrument panel junction block assembly)

      3. Combination meter assembly

      		 - Current status is maintained while the ignition switch is ON.

      Nothing

      [-]
      SRS warning light

      1. Combination meter assembly

      2. Airbag sensor assembly

      3. Combination meter assembly

      		 - Turns on until the ignition switch is turned off.

      U0151

      [Stored until the code is cleared with the GTS.]
      Meter/gauge Driver side seat belt warning light

      1. Combination meter assembly

      2. Main body ECU (instrument panel junction block assembly)

      3. Combination meter assembly

      		 - Current status is maintained while the ignition switch is ON.

      Nothing

      [-]
      Brake system warning light (yellow indicator)

      1. Combination meter assembly

      2. Brake actuator assembly (skid control ECU)

      3. Combination meter assembly

      		 - Turns on until the ignition switch is turned off.

      U0129

      [Stored until the code is cleared with the GTS.]
      CHARGE warning light

      1. Combination meter assembly

      2. ECM

      3. Combination meter assembly

      		 - Current status is maintained until the ignition switch is turned off.

      Nothing

      [-]
      EPS indicator light

      1. Combination meter assembly

      2. Power steering ECU assembly

      3. Combination meter assembly

      		 - Turns on until ignition switch is turned off.

      U0131

      [Stored until the code is cleared with the GTS.]
      ABS warning light

      1. Combination meter assembly

      2. Brake actuator assembly (skid control ECU)

      3. Combination meter assembly

      		 - Current status is maintained until the ignition switch is turned off.

      Nothing

      [-]
      Rr FOG indicator light

      1. Combination meter assembly

      2. Main body ECU (instrument panel junction block assembly)

      3. Combination meter assembly

      		 - Current status is maintained while the ignition switch is ON and turns off when the ignition switch is turned off.

      Nothing

      [-]
      SLIP indicator light

      1. Combination meter assembly

      2. Brake actuator assembly (skid control ECU)

      3. Combination meter assembly

      		 - Current status is maintained until the ignition switch is turned off.

      Nothing

      [-]
      Meter/gauge

      • CRUISE main indicator light

      • CRUISE SET indicator light

      1. Combination meter assembly

      2. ECM

      3. Combination meter assembly

      		 - Current status is maintained until the ignition switch is turned off.

      Nothing

      [-]
      Fr FOG indicator light

      1. Combination meter assembly

      2. Main body ECU (instrument panel junction block assembly)

      3. Combination meter assembly

      		 - Current status is maintained while the ignition switch is ON and turns off when the ignition switch is turned off.

      Nothing

      [-]
      TAIL indicator light

      1. Combination meter assembly

      2. Main body ECU (instrument panel junction block assembly)

      3. Combination meter assembly

      		 - Current status is maintained while the ignition switch is ON and turns off when the ignition switch is turned off.

      Nothing

      [-]
      ASL indicator light

      1. Combination meter assembly

      2. ECM

      3. Combination meter assembly

      		 - Current status is maintained until the ignition switch is turned off.

      Nothing

      [-]
      SIL indicator light

      1. Combination meter assembly

      2. ECM

      3. Combination meter assembly

      		 - Current status is maintained until the ignition switch is turned off.

      Nothing

      [-]

      Sport mode indicator

      (Displays the indicator in the meter according to the indicator illumination request signal.)

      1. Combination meter assembly

      2. ECM

      3. Combination meter assembly

      		 - Nothing

      Nothing

      [-]

      Eco indicator

      (Displays the indicator in the meter according to the indicator illumination request signal.)

      1. Combination meter assembly

      2. ECM

      3. Combination meter assembly

      		 - Nothing

      Nothing

      [-]

      Eco driving indicator

      (Displays information in the multi-display according to display request signals.)

      1. Combination meter assembly

      2. ECM

      3. Combination meter assembly

      		 - Nothing

      Nothing

      [-]
      Key reminder buzzer

      1. Combination meter assembly

      2. Main body ECU (instrument panel junction block assembly)

      3. Combination meter assembly

      		 - Does not sound.

      Nothing

      [-]
      Meter/gauge Entry and start buzzer (Continuous, intermittent and single)

      1. Combination meter assembly

      2. Certification ECU

      3. Combination meter assembly

      		 - Does not sound.

      Nothing

      [-]
      Immobiliser key buzzer

      1. Combination meter assembly

      2. Certification ECU

      3. Combination meter assembly

      		 - Does not sound.

      Nothing

      [-]
      Driving with parking brake applied buzzer

      1. Combination meter assembly

      2. Brake actuator assembly (skid control ECU)

      3. Combination meter assembly

      		 - Control is performed with the vehicle speed set to 0 km/h (0 mph).

      Nothing

      [-]
      Driving with open door buzzer

      1. Combination meter assembly

      2. Main body ECU (instrument panel junction block assembly), Brake actuator assembly (skid control ECU)

      3. Combination meter assembly

      		 -

      Control is performed with the following conditions set as below:


      • Vehicle speed is 0 km/h (0 mph).

      • Door status is maintained as the status indicated by the last received signal.

      Nothing

      [-]
      Sports shift reject buzzer

      1. Combination meter assembly

      2. ECM

      3. Combination meter assembly

      		 - Status is maintained until the ignition switch is turned off.

      Nothing

      [-]
      Light reminder buzzer

      1. Combination meter assembly

      2. Main body ECU (instrument panel junction block assembly)

      3. Combination meter assembly

      		 - Does not sound.

      Nothing

      [-]

      Seat belt buzzer

      (Sounds the buzzer according to the buzzer sounding request signal.)

      1. Combination meter assembly

      2. Main body ECU (instrument panel junction block assembly)

      3. Combination meter assembly

      		 - Nothing

      Nothing

      [-]
      Meter/gauge

      Hill-start assist control buzzer

      (Sounds the buzzer according to the buzzer sounding request signal.)

      1. Combination meter assembly

      2. Brake actuator assembly (skid control ECU)

      3. Combination meter assembly

      		 - Nothing

      Nothing

      [-]

      EPS buzzer

      (Sounds the buzzer according to the buzzer sounding request signal.)

      1. Combination meter assembly

      2. Power steering ECU assembly

      3. Combination meter assembly

      		 - Nothing

      Nothing

      [-]

      VSC buzzer

      (Sounds the buzzer according to the buzzer sounding request signal.)

      1. Combination meter assembly

      2. Brake actuator assembly (skid control ECU)

      3. Combination meter assembly

      		 - Nothing

      Nothing

      [-]
      On-board computer

      1. Combination meter assembly

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

      3. Combination meter assembly

      		 -

      • Current fuel consumption: Calculation stops until the ignition switch is turned off and only the scale is displayed.

      • Average fuel consumption: Calculation stops until the ignition switch is turned off and only the units are displayed.

      • Average vehicle speed: Calculation stops until the ignition switch is turned off and only the units are displayed.

      • Cruising range: Calculation stops until the ignition switch is turned off and only the units are displayed.

      • Elapsed driving time: Calculation stops and the display is blank.

      Nothing

      [-]
      Meter/gauge Multi-display VSC

      1. Combination meter assembly

      2. Brake actuator assembly (skid control ECU)

      3. Combination meter assembly

      		 - "CHECK VSC SYSTEM" is displayed in the multi-information display.

      Nothing

      [-]
      Multi-display DOOR

      1. Combination meter assembly

      2. Main body ECU (instrument panel junction block assembly)

      3. Combination meter assembly

      		 - Current status is maintained while the ignition switch is ON and turns off when the ignition switch is turned off.

      Nothing

      [-]
      Multi-display power management

      1. Combination meter assembly

      2. Certification ECU

      3. Combination meter assembly

      		 - Current status is maintained while the ignition switch is ON and turns off when the ignition switch is turned off.

      Nothing

      [-]
      Multi-display rear seat belt

      1. Combination meter assembly

      2. Main body ECU (instrument panel junction block)

      3. Combination meter assembly

      		 - Current status is maintained while the ignition switch is ON and turns off when the ignition switch is turned off.

      Nothing

      [-]
      Multi-display brake system

      1. Combination meter assembly

      2. Brake actuator assembly (skid control ECU)

      3. Combination meter assembly

      		 - Current status is maintained while the ignition switch is ON and turns off when the ignition switch is turned off.

      Nothing

      [-]
      Multi-display entry and start system

      1. Combination meter assembly

      2. Certification ECU

      3. Combination meter assembly

      		 - Current status is maintained while the ignition switch is ON and turns off when the ignition switch is turned off.

      Nothing

      [-]
      Multi-display steering lock system

      1. Combination meter assembly

      2. Certification ECU

      3. Combination meter assembly

      		 - Current status is maintained while the ignition switch is ON and turns off when the ignition switch is turned off.

      Nothing

      [-]
      Multi-display OIL pressure

      1. Combination meter assembly

      2. ECM

      3. Combination meter assembly

      		 - Control is performed with the tachometer value set to 0 rpm.

      Nothing

      [-]
      Meter/gauge Multi-display transmission fluid temperature

      1. Combination meter assembly

      2. ECM

      3. Combination meter assembly

      		 - The "HIGH TRANSMISSION FLUID TEMPERATURE" display turns off when the ignition switch is turned off.

      Nothing

      [-]
      Multi-display LIGHT reminder

      1. Combination meter assembly

      2. Main body ECU (instrument panel junction block assembly)

      3. Combination meter assembly

      		 - Turns off.

      Nothing

      [-]
      Multi-display OIL LEVEL

      1. Combination meter assembly

      2. ECM

      3. Combination meter assembly

      		 - Control is performed with the engine coolant temperature set to 78°C (172°F) or higher.

      Nothing

      [-]
      Multi-display OIL MAINTENANCE

      1. Combination meter assembly

      2. ECM

      3. Combination meter assembly

      		 - "OIL MAINTENANCE REQUIRED" is displayed in the multi-information display.

      Nothing

      [-]
      DTC

      1. Combination meter assembly

      2. Airbag sensor assembly, ECM, Power steering ECU assembly, Brake actuator assembly (skid control ECU)

      3. Combination meter assembly

      		 - Switches to normal mode.

      Nothing

      [-]

      Smart beam indicator

      (Illuminates the indicator in the meter based on the indicator illumination request signal.)

      1. Combination meter assembly

      2. Main body ECU (instrument panel junction block assembly)

      3. -

      		 The signal state from before the interruption is used until the ignition switch is turned off. Nothing

      Nothing

      [-]

      PCS indicator

      (Illuminates the indicator in the meter based on the indicator illumination request signal.)

      1. Combination meter assembly

      2. Pre-collision city sensor

      3. -

      		 Control is performed by flashing the indicator until the ignition switch is turned off. The indicator blinks.

      U023A

      [Stored until the code is cleared with the GTS.]

      PCS warning

      (Displays a warning in the multi-display based on the display request signal.)

      1. Combination meter assembly

      2. Pre-collision city sensor

      3. -

      		 The signal state from before the interruption is used until the ignition switch is turned off. Nothing

      U023A

      [Stored until the code is cleared with the GTS.]

      Pre-collision city sensor option determination

      (Determines whether the vehicle is equipped with a pre-collision city sensor based on the pre-collision system availability flag signal.)

      1. Combination meter assembly

      2. Pre-collision city sensor

      3. -

      		 The signal state from before the interruption is used until the ignition switch is turned off. Nothing

      U023A

      [Stored until the code is cleared with the GTS.]
      Meter/gauge

      PCS sensitivity display

      (Displays the PCS sensitivity display based on the PCS sensitivity display request signal.)

      1. Combination meter assembly

      2. Pre-collision city sensor

      3. -

      		 The signal state from before the interruption is used until the ignition switch is turned off. Nothing

      U023A

      [Stored until the code is cleared with the GTS.]

      PCS malfunction buzzer

      (Sounds the buzzer based on the buzzer sounding request signal.)

      1. Combination meter assembly

      2. Pre-collision city sensor

      3. -

      		 The signal state from before the interruption is used until the ignition switch is turned off. Nothing

      U023A

      [Stored until the code is cleared with the GTS.]

      LDA indicator

      (Displays the indicator in the meter based on the indicator illumination request signal.)

      1. Combination meter assembly

      2. Pre-collision city sensor

      3. -

      		 Control is performed by turning off the LDA indicator and lane markers until the ignition switch is turned off. Indicator illuminates. -

      LDA warning display

      (Displays a warning in the multi-display based on the display request signal.)

      1. Combination meter assembly

      2. Pre-collision city sensor

      3. -

      		 Control is performed by turning off the lane markers until the ignition switch is turned off. Indicator illuminates. -

      Pre-collision city sensor option determination

      (Determines whether the vehicle is equipped with a pre-collision city sensor based on the lane departure alert system availability flag signal.)

      1. Combination meter assembly

      2. Pre-collision city sensor

      3. -

      		 The state from before the interruption is used until the ignition switch is turned off. Nothing -

      LDA buzzer

      (Sounds the buzzer based on the buzzer sounding request signal.)

      1. Combination meter assembly

      2. Pre-collision city sensor

      3. -

      		 Buzzer is sounded until the ignition switch is turned off. Buzzer does not sound. -

      Turn signal switch signal

      (Sends the status of the turn signal switch.)

      1. Pre-collision city sensor

      2. Combination meter assembly

      3. -

      		 - Nothing -
      Power management control

      Push Start

      (This system changes the power source mode based on the push start switch signal and requests starter operation when certain conditions are met.)

      1. Power management control ECU

      2. ECM

      3. -

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

      U0100

      [Stored until the code is cleared with the GTS.]

      Engine Start Control

      (Prohibits and permits turning on the starter according to the vehicle state and start request signals.)

      1. Power management control ECU

      2. ECM

      3. -

      Normally, signals are received from the direct line and the CAN line. Engine start control is performed using the signal closer to the actual NE signal (engine speed).

      When there is a malfunction, engine start control is performed using the NE signal (engine speed) from the direct line. SAE code U0100 is stored in the SRAM indicating that there is a CAN communication malfunction.

      		 Nothing

      U0100

      [Stored until the code is cleared with the GTS.]

      Charging control

      (Changes the amount of voltage generated by the alternator according to the driving state of the vehicle and battery capacity.)

      1. Power management control ECU

      2. ECM

      3. -

      The alternator changes to the autonomous electricity generating mode.

      (The amount of electricity generated is the same as when there is no charging control.)

      		 Nothing

      Nothing

      [-]
      Entry and start

      Entry and Start System


      • Performs the entry lock/unlock, entry back door open/unlatch operations.

      • Operates the entry alarm.

      • Operates the entry illumination (dome light illumination, etc.).

      1. Certification ECU (smart key ECU assembly), Main body ECU (instrument panel junction block assembly)

      2. Certification ECU (smart key ECU assembly), Main body ECU (instrument panel junction block assembly)

      3. Combination meter assembly, Main body ECU (instrument panel junction block assembly)

      		 An entry unlock retry is performed.

      When transmission is lost:


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

      • The entry and start warnings (the key lock-in prevention warning, 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 answer back function repeats a maximum of 3 times when an unlock operation is performed. However, only if the main body ECU is able to receive a request from the certification ECU.

      • The entry and 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.

      • U0142

      • U0155

      [Stored until the code is cleared with the GTS.]

      Entry and Start System


      • Performs the entry lock/unlock, entry back door open/unlatch operations.

      • Operates the entry alarm.

      • Operates the entry illumination (dome light illumination, etc.).

      1. Certification ECU (smart key ECU assembly)

      2. Engine stop and start ECU

      3. Combination meter assembly

      		 Nothing Falsely outputs the entry warning.

      U1103

      [Stored until the code is cleared with the GTS.]
      Entry and start

      Entry and Start System


      • Performs the entry lock/unlock, entry back door open/unlatch operations.

      • Operates the entry alarm.

      • Operates the entry illumination (dome light illumination, etc.).

      1. Certification ECU (smart key ECU assembly)

      2. ECM

      3. Combination meter assembly

      • When there is a reception stop: The previous value is maintained.

      • When there is a cyclic malfunction: An entry unlock retry is performed.

      • When there is a reception stop: Falsely outputs the entry warning.

      • When there is a cyclic malfunction:


        • The answer back function repeats a maximum of 3 times when an unlock operation is performed. However, only if the main body ECU is able to receive a request from the certification ECU.

        • The entry and 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.

      • When a continuous bus is detected:


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

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

        • Entry illumination does not operate.

      U0100

      [Stored until the code is cleared with the GTS.]
      Entry and start

      Wireless Function

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

      1. Main body ECU (instrument panel junction block assembly)

      2. Main body ECU (instrument panel junction block assembly), Certification ECU (smart key ECU assembly)

      3. Main body ECU (instrument panel junction block assembly)

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

      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 (instrument panel junction block assembly), Certification ECU (smart key ECU assembly), Combination meter assembly

      3. Certification ECU (smart key ECU assembly)

      When there is a reception stop:


      • 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.

      When there is a cyclic malfunction: 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

      [Stored until the code is cleared with the GTS.]
      Main Body

      Door Lock

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

      1. Main body ECU (instrument panel junction block assembly)

      2. ECM, Combination meter assembly Airbag sensor assembly

      3. Main body ECU (instrument panel junction block assembly)

      When there is a reception stop or when the bus is continuously detected (ECM or combination meter assembly): The speed-sensitive automatic door lock operation is prohibited.

      When there is a reception stop (Airbag sensor assembly):


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

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

      		 -

      • U0100

      • U0151

      • U0155

      [Stored until the code is cleared with the GTS.]
      Main Body

      Illumination

      (Performs illumination control.)

      1. Main body ECU (instrument panel junction block assembly)

      2. Certification ECU (smart key ECU assembly)

      3. Main body ECU (instrument panel junction block assembly)

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

      U0327

      [Stored until the code is cleared with the GTS.]

      Entry/Wireless

      (Entry/wireless control)

      1. Certification ECU (smart key ECU assembly)

      2. Main body ECU (instrument panel junction block assembly)

      3. Certification ECU (smart key ECU assembly)

      		 Entry lock/unlock control not possible. Nothing

      U0327

      [Stored until the code is cleared with the GTS.]

      Lighting Control

      (Performs DRL control)

      1. Main body ECU (instrument panel junction block assembly)

      2. ECM

      3. Main body ECU (instrument panel junction block assembly)

      		 Daytime running light control is not performed. Nothing

      U0100

      [Stored until the code is cleared with the GTS.]

      Back Door Opener

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

      1. Main body ECU (instrument panel junction block assembly)

      2. Combination meter assembly

      3. Main body ECU (instrument panel junction block assembly)

      		 Back door opener control is prohibited. Nothing

      U0155

      [Stored until the code is cleared with the GTS.]

      ABS

      (ABS helps prevent the wheels from locking and supports vehicle stability when braking fully.)

      1. Brake actuator assembly (skid control ECU)

      2. -

      3. Brake actuator assembly (skid control ECU)

      		 Only EBD control is operable and the slip indicator, ABS warning light and brake warning light illuminate. Slip indicator warning light, ABS warning light and brake warning light illuminate.

      U0073

      [Stored until the code is cleared with the GTS.]

      VSC

      (VSC suppresses sideways sliding when the driver suddenly turns the steering wheel while driving at high speeds, on snowy roads, etc.)

      1. Brake actuator assembly (skid control ECU)

      2. ECM, Spiral with sensor cable subassembly (steering angle sensor), Yaw rate sensor

      3. Brake actuator assembly (skid control ECU)

      • VSC control stops.

      • Slip indicator warning light illuminates.

      • Only EBD control is operable and the slip indicator, ABS warning light and brake warning light illuminate.

      		 Slip indicator warning light, ABS warning light and brake warning light illuminate.

      • U0073

      • U0100

      • U0123

      • U0126

      [Stored until the code is cleared with the GTS.]
      Main Body

      TRC

      (Ensures stability and traction by performing torque control. This control uses the engine speed and accelerator pedal position.)

      1. Brake actuator assembly (skid control ECU)

      2. ECM, Spiral with sensor cable subassembly (steering angle sensor), Yaw rate sensor

      3. Brake actuator assembly (skid control ECU)

      • TRC control stops.

      • Slip indicator warning light illuminates.

      • Only EBD control is operable and the slip indicator, ABS warning light and brake warning light illuminate.

      		 Slip indicator warning light, ABS warning light and brake warning light illuminate.

      • U0073

      • U0100

      • U0123

      • U0126

      [Stored until the code is cleared with the GTS.]

      HAC

      (Braking torque is maintained to prevent the vehicle from slipping backwards when stopped on an uphill slope.)

      1. Brake actuator assembly (skid control ECU)

      2. ECM, Spiral with sensor cable subassembly (steering angle sensor), Yaw rate sensor

      3. Brake actuator assembly (skid control ECU)

      • Hill-start assist control stops.

      • Slip indicator warning light illuminates.

      • Only EBD control is operable and the slip indicator, ABS warning light and brake warning light illuminate.

      		 Slip indicator warning light, ABS warning light and brake warning light illuminate.

      • U0073

      • U0100

      • U0123

      • U0126

      [Stored until the code is cleared with the GTS.]

      PCS

      (Applies the brakes based on information from the radar and camera to avoid a collision.)

      1. Brake actuator assembly (skid control ECU)

      2. ECM, Spiral with sensor cable subassembly (steering angle sensor), Yaw rate sensor, Pre-collision city sensor

      3. Brake actuator assembly (skid control ECU)

      • PCS brake control stops.

      • Slip indicator warning light illuminates.

      		 Slip indicator warning light, ABS warning light and brake warning light illuminate.

      • U0073

      • U0100

      • U0123

      • U0126

      [Stored until the code is cleared with the GTS.]
      EPS

      Assist Map Selection

      (When test mode is entered at the factory, assist map is selected based on vehicle information and written to the EEPROM. Afterwards, every time the ignition switch is turned to ON, the map stored in the EEPROM and CAN information are compared.)

      1. Power steering ECU assembly

      2. ECM

      3. Power steering ECU assembly

      		 If the assist map number has not been written to the EEPROM, default operation is performed. EPS warning light turns on.

      C1581

      [Stored only while the malfunction is present.]

      Steering Assist

      (Assists with steering.)

      1. Power steering ECU assembly

      2. ECM

      3. Power steering ECU assembly

      		 If no message is displayed and vehicle speed is normal, a DTC is stored. Nothing

      U0100

      [Stored until the code is cleared with the GTS.]

      Idle Up

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

      1. ECM

      2. Power steering ECU assembly

      3. ECM

      		 Nothing Nothing -

      DTC Output

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

      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 -

      Warning Light Illumination

      (When a fail-safe occurs, requests the meter ECU to illuminate the EPS warning light.)

      1. Combination meter assembly

      2. Power steering ECU assembly

      3. Combination meter assembly

      		 Nothing Nothing -
      EPS

      α-B Cooperative Control

      (Adjusts steering assist to prevent sliding sideways.)

      1. Power steering ECU assembly

      2. ECM

      3. Power steering ECU assembly

      		 Nothing Nothing -

      Simple Load Control

      (Determines the load control level based on the power source voltage and load status, and sends commands to restrict operation of other ECUs.)

      1. Air conditioning amplifier assembly

      2. Power steering ECU assembly

      3. Air conditioning amplifier assembly

      		 Nothing Nothing -

      Eco-run Control

      (Stops the steering assist function when the engine is stopped by Eco-run control. Also, sends steering torque information to power management.)

      1. Power steering ECU assembly, Engine stop and start ECU

      2. Power steering ECU assembly, Engine stop and start ECU, Power management control ECU

      3. Power steering ECU assembly, Engine stop and start ECU

      		 Nothing Nothing -
      Navigation System

      Eco Navigation Display

      (Displays the fuel consumption in 1 minute intervals, and displays the average fuel consumption history.)

      1. Radio and display 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

      [Stored until the code is cleared with the GTS.]

      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

      2. Main body ECU (instrument panel junction block assembly)

      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

      [Stored until the code is cleared with the GTS.]

      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

      2. Air conditioning amplifier assembly, Main body ECU (instrument panel junction block assembly), Certification ECU (smart key ECU assembly)

      3. -

      • When a phase 4 remote communication usage application is performed (customize or remote diagnosis), the information is processed regardless of whether the main body ECU has permitted or prohibited remote communication.

      • When a phase 4 remote communication usage application is performed (customize or remote diagnosis), the information is processed regardless of whether the main body ECU has permitted or prohibited remote communication.

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

      • B15F5

      • B15F6

      • B15F7

      [Stored until the code is cleared with the GTS.]
      Navigation System

      Rear View Monitor Control

      (Rear view control displays the back camera view.)

      1. Radio and display receiver assembly

      2. ECM, Main body ECU (instrument panel junction block assembly)

      3. -

      		 Nothing The screen does not change to the camera screen.

      U0100

      [Stored until the code is cleared with the GTS.]

      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

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

      3. -

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

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

      		 Nothing

      • U0100

      • U0129

      • U0155

      [Stored until the code is cleared with the GTS.]
      Eco Run

      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 (instrument panel junction block assembly), Air conditioning amplifier assembly, Airbag sensor assembly, Combination meter assembly, Spiral with sensor cable sub-assembly (steering angle sensor)

      3. ECM

      • During eco-run: Restarts.

      • Not during eco-run: Prohibits eco-run.

      		 ECO driving indicator light blinks.

      • U0100

      • U0121

      • U0124

      • U0126

      • U0140

      • U0151

      • U0155

      • U0164

      [Stored until the code is cleared with the GTS.]
      Gateway

      Lost communication detection

      (The NS and NM frames of the ECU connected to the global bus are monitored to detect for ECU communication failures.)

      1. Network gateway ECU

      2. ECUs connected to the global bus

      3. -

      		 Records the communication failure time. Nothing -
      Pre-collision city sensor

      PCS

      (When there is high possibility of collision with an obstacle in front of the vehicle, warnings are issued and the automatic brake operates.)

      1. Pre-collision city sensor

      2. ECM, Brake actuator assembly (skid control ECU), Airbag sensor assembly, Spiral with sensor cable subassembly (steering angle sensor), Combination meter assembly

      3. -

      • PCS automatic brake is disabled.

      • PCS control is disabled.

      • Meter buzzer sounds.

      • PCS indicator blinks.

      • Warning message is displayed on the multi-information display.

      • U0100

      • U0123

      • U0126

      • U0129

      • U0155

      • U023A

      [Stored until the code is cleared with the GTS.]

      LDA

      (Warns the user when the vehicle deviates from its lane.)

      1. Pre-collision city sensor

      2. ECM, Brake actuator assembly (skid control ECU), Airbag sensor assembly, Spiral with sensor cable subassembly (steering angle sensor), Combination meter assembly

      3. -

      		 LDA control is disabled.

      • Meter buzzer sounds.

      • Warning message is displayed on the multi-information display.

      • U0100

      • U0123

      • U0126

      • U0129

      • U0155

      [Stored until the code is cleared with the GTS.]