ENTRY AND START SYSTEM(for Start Function) Power Source Mode does not Change to ON (IG and ACC)

DESCRIPTION

If any of the following operations are performed, the certification ECU (smart key ECU assembly) receives a signal, and changes the power source mode.


Related Data List and Active Test Items
Problem Symptom Data List and Active Test
Power source mode does not change to on (IG) or on (ACC)

    Power Source Control

  • Start Switch1

  • Start Switch2

  • Latch Circuit

  • ACC Relay Monitor

  • Power Supply Condition

  • IG Relay Monitor (Outside)

  • IG Relay Monitor (Inside)

WIRING DIAGRAM

A003KN2E07
A003K4UE11
*a No. 1 Indoor Electrical Key Antenna Assembly (Front Floor)
*b No. 2 Indoor Electrical Key Antenna Assembly (Rear Floor)
*c No. 3 Indoor Electrical Key Antenna Assembly (Inside Luggage Compartment)
*d Certification ECU (Smart Key ECU Assembly)

CAUTION / NOTICE / HINT

Note


  • When using the GTS with the power switch off, connect the GTS to the DLC3 and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the GTS and the vehicle begins. Then select Model Code "KEY REGIST" under manual mode and enter the following menus: Body Electrical / Entry&Start(CAN). While using the GTS, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the GTS and the vehicle.

  • The entry and start system (for Start Function) uses the LIN communication system and CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Troubleshoot the entry and start system (for Start Function) after confirming that the communication systems are functioning properly.

    Click here

  • Make sure that no DTCs are output. If any DTCs are output, proceed to Diagnostic Trouble Code Chart.

  • If the entry and start system (for Start Function) has been canceled, enable the system before performing troubleshooting.

    Click here

  • Inspect the fuses of circuits related to this system before performing the following procedure.

  • Before replacing the certification ECU (smart key ECU assembly) or an electrical key transmitter sub-assembly, refer to entry and start system (for Start Function) Precaution.

    Click here

  • After completing repairs, confirm that the problem does not recur.

Tech Tips

When the cable is disconnected and reconnected to the negative (-) auxiliary battery terminal, the power source mode returns to the state it was in before the cable was disconnected.

PROCEDURE


  1. CHECK ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY


    1. Press a switch of the electrical key transmitter sub-assembly.

      OK
      The electrical key transmitter sub-assembly LED illuminates.
      Result
      Proceed to
      OK
      NG

    NG
    OK
  2. READ VALUE USING GTS (KEY LOW BATTERY)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / Entry&Start / Data List.

    5. Read the Data List according to the display on the GTS.


      Body Electrical > Entry&Start > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Key Low Battery Transmitter battery depleted No or Yes

      No: Transmitter battery not depleted

      Yes: Transmitter battery depleted

      The electrical key transmitter sub-assembly sends voltage information to the certification ECU (smart key ECU assembly) when it is transmitting. "Yes" is displayed for the Data List item "Key Low Battery" when this voltage information indicates 2.2 V or less. This Data List item should be checked when the electrical key transmitter sub-assembly is at room temperature (example: at -20°C (-4°F), "Yes" may be displayed even if the transmitter battery is new).

      Body Electrical > Entry&Start > Data List
      Tester Display
      Key Low Battery
      OK
      "No" is displayed on the GTS screen.
      Result
      Proceed to
      OK
      NG

    NG
    OK
  3. CHECK ENTRY LOCK OPERATION


    1. Check that the entry lock and unlock functions operate on each door.

      Click here

      Tech Tips

      If the door control receiver is defective, code verification does not begin in the cabin and the entry lock and unlock functions do not operate.

      Result
      Result Proceed to
      Entry functions operate normally for all doors (w/ Wireless Charging System) A
      Entry functions operate normally for all doors (w/o Wireless Charging System) B
      An entry function does not operate normally for a door C

    B
    C
    A
  4. CHECK WIRELESS CHARGING SYSTEM


    1. Wireless charging system off.

      Click here

    2. Check that interior certification is performed.

      Click here

      Result
      Result Proceed to
      Interior certification is not performed normally A
      Interior certification is performed normally B

    B
    A
  5. CHECK ENTRY AND START SYSTEM (for Start Function)


    1. Remove the transmitter battery from the electrical key transmitter sub-assembly.

    2. A003P89C04
      *1 Power Switch
      *2 Electrical Key Transmitter Sub-assembly

      With the brake pedal depressed, hold the electrical key transmitter sub-assembly near the power switch and check if the power source mode changes.

      OK
      The power source mode changes.

      Tech Tips

      If the power source mode changes, the cabin verification is malfunctioning.

      Result
      Result Proceed to
      The power source mode changes A
      The power source mode does not change B

    B
    A
  6. CHECK WAVE ENVIRONMENT


    1. Install the transmitter battery to the electrical key transmitter sub-assembly.

      Click here

    2. Bring the electrical key transmitter sub-assembly near the No. 1 indoor electrical key antenna assembly (front floor) and perform an entry and start system check.

      Click here

      Note

      Communication may not be possible if the electrical key transmitter sub-assembly is within 0.2 m (0.656 ft.) of the No. 1 indoor electrical key antenna assembly (front floor).

    3. Bring the electrical key transmitter sub-assembly near the No. 2 indoor electrical key antenna assembly (rear floor) and perform an entry and start system check.

      Click here

      Note

      Communication may not be possible if the electrical key transmitter sub-assembly is within 0.2 m (0.656 ft.) of the center of the No. 2 indoor electrical key antenna assembly (rear floor).

      Tech Tips

      Check that the customize setting "Ignition Available Area" is set to "All".

    4. Bring the electrical key transmitter sub-assembly near the No. 3 indoor electrical key antenna assembly (inside luggage compartment) and perform an entry and start system check.

      Click here

      Note

      Communication may not be possible if the electrical key transmitter sub-assembly is within 0.2 m (0.656 ft.) of the center of the No. 3 indoor electrical key antenna assembly (inside luggage compartment).

      Tech Tips

      Check that the customize setting "Ignition Available Area" is set to "All".

      Tech Tips


      • As the effect of wave interference decreases by moving the electrical key transmitter sub-assembly close to each indoor electrical key antenna assembly, it may be possible to check whether wave interference is the cause of the problem.

      • If the inspection result is that the problem only occurs in certain locations or at certain times of day, the possibility of wave interference is high. Also, added vehicle components may cause wave interference. If installed, remove them and perform the operation check.

      • There may be wave interference if the vehicle is near broadcasting antennas, large video displays, wireless garage door opener systems, wireless security cameras, home security systems, etc. In this case, move the vehicle to a different location and check if there is any improvement.

      • If a tool for checking radio waves, such as a signal strength meter, is available, move around the area while observing both the LF band (used by the vehicle antenna to form the detection area) and RF band (used by the electrical key transmitter sub-assembly for transmission) to check for locations where there is wave interference.

      OK
      The hybrid control system starts when the electrical key transmitter sub-assembly is held near each indoor electrical key antenna assembly and the power switch is pressed with the brake pedal depressed.
      Result
      Proceed to
      OK
      NG

    OK
    NG
  7. CHECK FOR DTC (ENTRY&START)


    1. Check for DTCs.


      Body Electrical > Entry&Start > Trouble Codes
      OK
      DTCs are not output.
      Result
      Proceed to
      OK
      NG

    NG
    OK
  8. CHECK FOR DTC (POWER SOURCE CONTROL)


    1. Check for DTCs.


      Body Electrical > Power Source Control > Trouble Codes
      OK
      DTCs are not output.
      Result
      Proceed to
      OK
      NG

    NG
    OK
  9. CHECK KEY DIAGNOSTIC MODE


    1. Check the following antennas in key diagnostic mode.


      Body Electrical > Entry&Start > Utility
      Tester Display
      Communication Check(Key Diag Mode)

      Tech Tips


      • Select either channel 1 or channel 2 and perform the key diagnostic mode inspection for each channel.

      • If the buzzer sounds with [CH1] displayed but not with [CH2], the electrical key transmitter sub-assembly cannot be detected by channel 2 due to a malfunction, such as wave interference.

      • It is possible to check which indoor electrical key antenna assembly (front floor, rear floor or inside luggage compartment) is operating by the sounding of the buzzer.

      • When the wireless buzzer sounds for all indoor electrical key antenna assemblies, they can be judged as operating properly and a malfunction in the certification ECU (smart key ECU assembly), which performs verification, is suspected.

      • When the wireless buzzer does not sound for all indoor electrical key antenna assemblies, it can be judged that the certification ECU (smart key ECU assembly), which controls the indoor electrical key antenna assemblies, is malfunctioning.

    2. A003N5TC03
      *a Inspection Point

      Check the No. 1 indoor electrical key antenna assembly (front floor).

      When the electrical key transmitter sub-assembly is at either inspection point, check that the wireless buzzer sounds.

    3. A003OVEC03
      *a Inspection Point

      Check the No. 2 indoor electrical key antenna assembly (rear floor).

      When the electrical key transmitter sub-assembly is at either inspection point, check that the wireless buzzer sounds.

    4. A003L41C03
      *a Inspection Point

      Check the No. 3 indoor electrical key antenna assembly (inside luggage compartment).

      When the electrical key transmitter sub-assembly is at either inspection point, check that the wireless buzzer sounds.

      Result
      Result Proceed to
      The wireless buzzer does not sound for all indoor electrical key antenna assemblies A
      The wireless buzzer does not sound for only the No. 1 indoor electrical key antenna assembly (front floor) B
      The wireless buzzer does not sound for only the No. 2 indoor electrical key antenna assembly (rear floor) C
      The wireless buzzer does not sound for only the No. 3 indoor electrical key antenna assembly (inside luggage compartment) D
      The wireless buzzer sounds for all indoor electrical key antenna assemblies E

    A
    C
    D
    E
    B
  10. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) (OUTPUT TO NO. 1 INDOOR ELECTRICAL KEY ANTENNA ASSEMBLY (FRONT FLOOR))


    1. Using an oscilloscope, check the waveform.

      A003OI3C32
      *a

      Front view of wire harness connector

      (to No. 1 Indoor Electrical Key Antenna Assembly (Front Floor))

      *b Waveform 1
      *c For 30 seconds after closing any door *d After 30 seconds or more have elapsed since any door closed
      OK
      Tester Connection Condition Tool Setting Specified Condition
      I49-1 (ANTE5) - I49-3 (CLGB)

      Procedure:


      1. Power switch off

      2. Electrical key transmitter sub-assembly not inside vehicle

      3. Within 30 seconds of closing any door

      2 V/DIV., 500 ms/DIV.

      Pulse generation

      (See waveform 1)

      Result
      Proceed to
      OK
      NG

    NG
    OK
  11. REPLACE NO. 1 INDOOR ELECTRICAL KEY ANTENNA ASSEMBLY (FRONT FLOOR)


    1. Temporarily replace the No. 1 indoor electrical key antenna assembly (front floor) with a new one.

      Click here

      Result
      Proceed to
      NEXT

    NEXT
  12. CHECK POWER SOURCE MODE


    1. Get into the vehicle while carrying an electrical key transmitter sub-assembly.

    2. Check that park (P) is selected.

    3. Press the power switch with the brake pedal released and check that the power source mode changes.

      Result
      Result Proceed to
      The power source mode changes A
      The power source mode does not change B

    A
    B
  13. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) (OUTPUT TO NO. 2 INDOOR ELECTRICAL KEY ANTENNA ASSEMBLY (REAR FLOOR))


    1. Using an oscilloscope, check the waveform.

      A003OI3C33
      *a

      Front view of wire harness connector

      (to No. 2 Indoor Electrical Key Antenna Assembly (Rear Floor))

      *b Waveform 1
      *c For 30 seconds after closing any door *d After 30 seconds or more have elapsed since any door closed
      OK
      Tester Connection Condition Tool Setting Specified Condition
      N9-1 (ANTE6) - N9-3 (CLGB)

      Procedure:


      1. Power switch off

      2. Electrical key transmitter sub-assembly not inside vehicle

      3. Within 30 seconds of closing any door

      2 V/DIV., 500 ms/DIV.

      Pulse generation

      (See waveform 1)

      Result
      Proceed to
      OK
      NG

    NG
    OK
  14. REPLACE NO. 2 INDOOR ELECTRICAL KEY ANTENNA ASSEMBLY (REAR FLOOR)


    1. Temporarily replace the No. 2 indoor electrical key antenna assembly (rear floor) with a new one.

      Click here

      Result
      Proceed to
      NEXT

    NEXT
  15. CHECK POWER SOURCE MODE


    1. Get into the vehicle while carrying an electrical key transmitter sub-assembly.

    2. Check that park (P) is selected.

    3. Press the power switch with the brake pedal released and check that the power source mode changes.

      Result
      Result Proceed to
      The power source mode changes A
      The power source mode does not change B

    A
    B
  16. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) (OUTPUT TO NO. 3 INDOOR ELECTRICAL KEY ANTENNA ASSEMBLY (INSIDE LUGGAGE COMPARTMENT))


    1. Using an oscilloscope, check the waveform.

      A003OI3C34
      *a

      Front view of wire harness connector

      (to No. 3 Indoor Electrical Key Antenna Assembly (Inside Luggage Compartment))

      *b Waveform 1
      *c For 30 seconds after closing any door *d After 30 seconds or more have elapsed since any door closed
      OK
      Tester Connection Condition Tool Setting Specified Condition
      N28-1 (ANTE7) - N28-3 (CLGB)

      Procedure:


      1. Power switch off

      2. Electrical key transmitter sub-assembly not inside vehicle

      3. Within 30 seconds of closing any door

      2 V/DIV., 500 ms/DIV.

      Pulse generation

      (See waveform 1)

      Result
      Proceed to
      OK
      NG

    NG
    OK
  17. REPLACE NO. 3 INDOOR ELECTRICAL KEY ANTENNA ASSEMBLY (INSIDE LUGGAGE COMPARTMENT)


    1. Temporarily replace the No. 3 indoor electrical key antenna assembly (inside luggage compartment) with a new one.

      Click here

      Result
      Proceed to
      NEXT

    NEXT
  18. CHECK POWER SOURCE MODE


    1. Get into the vehicle while carrying an electrical key transmitter sub-assembly.

    2. Check that park (P) is selected.

    3. Press the power switch with the brake pedal released and check that the power source mode changes.

      Result
      Result Proceed to
      The power source mode changes A
      The power source mode does not change B

    A
    B
  19. READ VALUE USING GTS (START SWITCH1, START SWITCH2)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / Power Source Control / Data List.

    5. Read the Data List according to the display on the GTS.


      Body Electrical > Power Source Control > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Start Switch1 Power switch 1 status OFF or ON

      OFF: Power switch not pressed

      ON: Power switch pressed


      • If the power switch is pressed for a short time, the display may not change.

      • Use this item to determine if the power switch input signal is malfunctioning.

      Start Switch2 Power switch 2 status OFF or ON

      OFF: Power switch not pressed

      ON: Power switch pressed


      • Backup for power switch 1. However, when the power switch is pressed and held, the control functions only when both power switch 1 and 2 are normal.

      • Behaves the same way as power switch 1.


      Body Electrical > Power Source Control > Data List
      Tester Display
      Start Switch1
      Start Switch2
      OK
      The GTS display changes correctly in response to the power switch operation.
      Result
      Proceed to
      OK
      NG

    OK
    NG
  20. INSPECT POWER SWITCH


    1. Remove the power switch.

      Click here

    2. Inspect the power switch.

      Click here

      Result
      Proceed to
      OK
      NG

    NG
    OK
  21. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - POWER SWITCH)


    1. Disconnect the I1 certification ECU (smart key ECU assembly) connector.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      I1-23 (SSW1) - I53-5 (SS1) Always Below 1 Ω
      I1-21 (SSW2) - I53-1 (SS2) Always Below 1 Ω
      I1-11 (AGND) - I53-6 (AGND) Always Below 1 Ω
      I1-23 (SSW1) or I53-5 (SS1) - Body ground Always 10 kΩ or higher
      I1-21 (SSW2) or I53-1 (SS2) - Body ground Always 10 kΩ or higher
      I1-11 (AGND) or I53-6 (AGND) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK
    NG
  22. CHECK KEY DIAGNOSTIC MODE


    1. Check the following antennas in key diagnostic mode.


      Body Electrical > Entry&Start > Utility
      Tester Display
      Communication Check(Key Diag Mode)

      Tech Tips


      • Select either channel 1 or channel 2 and perform the key diagnostic mode inspection for each channel.

      • If the buzzer sounds with [CH1] displayed but not with [CH2], the electrical key transmitter sub-assembly cannot be detected by channel 2 due to a malfunction, such as wave interference.

      • It is possible to check if the transponder key amplifier built into the power switch is operating by the sounding of the buzzer.

    2. A003P89C04
      *1 Power Switch
      *2 Electrical Key Transmitter Sub-assembly

      Check the power switch.

      Face the logo side of the electrical key transmitter sub-assembly toward the power switch, hold the electrical key transmitter sub-assembly near the power switch and check that the wireless buzzer sounds.

      Result
      Result Proceed to
      The wireless buzzer does not sound A
      The wireless buzzer sounds B

    B
    A
  23. CHECK FOR DTC


    1. Using the GTS, check for certification ECU (smart key ECU assembly) DTCs.


      Body Electrical > Power Source Control > Trouble Codes
      Body Electrical > Entry&Start > Trouble Codes
      Result
      Result Proceed to
      DTCs are not output A
      Entry and start system (for Start Function) DTCs are output B

    B
    A
  24. CHECK HARNESS AND CONNECTOR (POWER SOURCE)

    Result
    Proceed to
    OK
    NG

    1. A003LHRC26
      *a

      Front view of wire harness connector

      (to Certification ECU (Smart Key ECU Assembly))

      Disconnect the I1 certification ECU (smart key ECU assembly) connector.

    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Condition Specified Condition
      I1-4 (+B) - Body ground Power switch off 11 to 14 V
      Result
      Proceed to
      OK
      NG

    NG
    OK
  25. CHECK HARNESS AND CONNECTOR (GROUND)

    Result
    Proceed to
    OK
    NG

    1. A003LHRC27
      *a

      Front view of wire harness connector

      (to Certification ECU (Smart Key ECU Assembly))

      Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      I1-18 (E) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG
    OK
  26. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)


    1. Disconnect the 3A and 3D instrument panel junction block assembly connectors.

    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      I1-16 (ACCD) - 3A-30 Always Below 1 Ω
      I1-17 (IG1D) - 3A-17 Always Below 1 Ω
      3D-3 - Body ground Always Below 1 Ω
      I1-16 (ACCD) or 3A-30 - Body ground Always 10 kΩ or higher
      I1-17 (IG1D) or 3A-17 - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG
    OK
  27. CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY (IG1-NO. 1, IG1-NO. 2, ACC RELAY)


    1. Remove the instrument panel junction block assembly.

      Click here

    2. Measure the resistance according to the value(s) in the table below.

      A003M1DC07
      *a

      Component without harness connected

      (Instrument Panel Junction Block Assembly)

      - -
      Standard Resistance
      Tester Connection Condition Specified Condition
      3A-30 - 3D-3 20°C (68°F) 285.71 to 428.57 Ω
      3A-17 - 3D-3 20°C (68°F) 142.86 to 214.29 Ω
      3K-1 - 3A-40 Auxiliary battery voltage applied between terminals 3A-30 and 3D-3 Below 1 Ω
      Auxiliary battery voltage not applied between terminals 3A-30 and 3D-3 10 kΩ or higher
      3K-1 - 3A-35 Auxiliary battery voltage applied between terminals 3A-17 and 3D-3 Below 1 Ω
      Auxiliary battery voltage not applied between terminals 3A-17 and 3D-3 10 kΩ or higher
      3K-1 - 3A-11 Auxiliary battery voltage applied between terminals 3A-17 and 3D-3 Below 1 Ω
      Auxiliary battery voltage not applied between terminals 3A-17 and 3D-3 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    NG
    OK
  28. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)


    1. Install the instrument panel junction block assembly.

      Click here

    2. Reconnect the I1 certification ECU (smart key ECU assembly) connector.

    3. Measure the voltage while confirming the power source mode on the Data List.

      A003M34C06
      *a

      Component with harness connected

      (Certification ECU (Smart Key ECU Assembly))

      - -

      Body Electrical > Power Source Control > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Power Supply Condition Power supply state All OFF, ACC ON, IG ON or ST ON

      All OFF: Power switch off

      ACC ON: Power switch on (ACC)

      IG ON: Power switch on (IG)

      ST ON: Sending hybrid control system start request signal

      -

      Body Electrical > Power Source Control > Data List
      Tester Display
      Power Supply Condition
      Standard Voltage
      Tester Connection Condition Specified Condition
      I1-17 (IG1D) - Body ground Power switch off 1 V or less
      Power switch on (ACC) 1 V or less
      Power switch on (IG) 9 V or higher
      I1-16 (ACCD) - Body ground Power switch off 1 V or less
      Power switch on (ACC) 8.5 V or higher
      Power switch on (IG) 8.5 V or higher
      Result
      Proceed to
      OK
      NG

    OK
    NG
  29. INSPECT TRANSMITTER BATTERY


    1. Inspect the transmitter battery.

      Click here

      Note

      Do not wrap the lead wire ground a terminal, wedge it between terminals, or solder it. The terminal may be deformed or damaged, and the transmitter battery will not be able to be installed correctly.

      Result
      Proceed to
      OK
      NG

    OK
    NG