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.


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.

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

    Power Source Control

  • Start Switch1

  • Start Switch2

  • Power Supply Condition

  • IG1 Relay Monitor(Inside)

  • IG2 Relay Monitor(Inside)

  • IG1 Relay Monitor(Outside)

  • IG2 Relay Monitor(Outside)

  • Latch Circuit

  • ACC Relay Monitor

 -

WIRING DIAGRAM

A004E3QE02

CAUTION / NOTICE / HINT

Note


  • When using the GTS with the vehicle power switch off, connect the GTS to the vehicle 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 the 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 uses multiplex communication. First perform the inspections in "How to Proceed with Troubleshooting" to confirm that there are no communication malfunctions before proceeding with troubleshooting Click here.

  • Before replacing the certification ECU (smart key ECU assembly) or electrical key transmitter sub-assembly, refer to the entry and start system (for Entry Function) precaution Click here.

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

  • If the entry and start system is disabled through the customize function, enable the system before performing troubleshooting Click here.

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

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

PROCEDURE


  1. CHECK WIRELESS DOOR LOCK CONTROL SYSTEM


    1. Check the wireless door lock function by operating the electrical key transmitter sub-assembly.

      OK
      Wireless door lock function operates.

    NG

    GO TO OTHER FLOW CHART (All DOOR ENTRY LOCK/UNLOCK FUNCTIONS AND WIRELESS FUNCTIONS DO NOT OPERATE) Click here

    OK

  2. CHECK HARNESS AND CONNECTOR (POWER SOURCE)


    1. A004FELE01
      Text in Illustration
      *a

      Rear view of wire harness connector

      (to Certification ECU (Smart Key ECU Assembly))

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

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      F88-2 (+B) - Body ground Power switch off 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR IN CIRCUIT CONNECTED TO POWER SOURCE

    OK

  3. CHECK HARNESS AND CONNECTOR (GROUND)

    A004EHSE02
    Text in Illustration
    *a

    Rear view of wire harness connector

    (to Certification ECU (Smart Key ECU Assembly))

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F88-11 (E) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK ENTRY AND START SYSTEM


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

    2. A004F12E01
      Text in Illustration
      *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 does not change. A
      The power source mode changes. B

    B

    READ VALUE USING GTS (START SWITCH1, 2) Click here

    A

  5. READ VALUE USING GTS (STOP LIGHT SWITCH1)


    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. According to the display on the GTS, read the Data List.

      Power Source Control
      Tester Display Measurement Item/Range Normal Condition Specified Condition
      Stop Light Switch1 State of brake pedal / OFF or ON

      OFF: Brake pedal released

      ON: Brake pedal depressed

      • Use this item to determine whether the stop light switch is malfunctioning.

      • The hybrid control system cannot be started when this item is OFF.

      • When this item is malfunctioning, the hybrid control system can be started by pressing and holding the power switch for a certain period of time.
      OK
      ON (brake pedal is depressed) and OFF (brake pedal is released) appear on the screen.
      Result
      Result Proceed to
      OK A
      NG (for Bulb Type Stop Light) B
      NG (for LED Type Stop Light) C

    B

    INSPECT STOP LIGHT SWITCH ASSEMBLY Click here

    C

    CHECK HARNESS AND CONNECTOR (STOP LIGHT SWITCH ASSEMBLY - POWER SOURCE AND BODY GROUND) Click here

    A

  6. READ VALUE USING GTS (POWER SUPPLY CONDITION)


    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. According to the display on the GTS, read the Data List.

      Power Source Control
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Power Supply Condition Power supply state / IG ON, ACC ON, IG1 ON, IG2 ON or ST ON

      IG ON: Power switch off

      ACC ON: Power switch on (ACC)

      IG1 ON: Power switch on (IG) (IG1 relay on)

      IG2 ON: Power switch on (IG) (IG2 relay on)

      ST ON: Sending hybrid control system start request signal

      		 Since the IG1 and IG2 relays turn on at approximately the same time, IG1 ON may not be displayed (the IG1 relay turns on for a very short time).

    6. With the power switch off and brake pedal depressed, hold the electrical key transmitter sub-assembly near the power switch for 2 seconds or more and read the Data List.

      OK
      IG2 ON is displayed in the Data List.

      Tech Tips

      If the entry and start system function has been canceled on the customization menu, ACC ON is displayed in the Data List.


    NG

    CHECK FOR DTC Click here

    OK

  7. INSPECT CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)


    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. According to the display on the GTS, read the Data List.

      Power Source Control
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Power Supply Condition Power supply state / IG ON, ACC ON, IG1 ON, IG2 ON or ST ON

      IG ON: Power switch off

      ACC ON: Power switch on (ACC)

      IG1 ON: Power switch on (IG) (IG1 relay on)

      IG2 ON: Power switch on (IG) (IG2 relay on)

      ST ON: Sending hybrid control system start request signal

      		 Since the IG1 and IG2 relays turn on at approximately the same time, IG1 ON may not be displayed (the IG1 relay turns on for a very short time).

    6. Measure the voltage while checking the Data List on the GTS.

      A004FL5E01
      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      F86-6 (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
      F88-9 (IG2D) - 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
      F86-4 (ACCD) - Body ground Power switch off 1 V or less
      Power switch on (IG) 8.5 V or higher
      Power switch on (ACC) 8.5 V or higher
      Text in Illustration
      *a

      Component with harness connected

      (Certification ECU (Smart Key ECU Assembly))

    OK

    CHECK RELAY CONTACT SIDE CIRCUIT

    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

  8. READ VALUE USING GTS (START SWITCH1, 2)


    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. According to the display on the GTS, read the Data List.

      Power Source Control
      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 whether 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.
      OK
      ON (Power switch is pressed) and OFF (Power switch is not pressed) appear on the screen.
      Result
      Result Proceed to
      NG A
      OK B

    B

    GO TO OTHER FLOW CHART (ROOM OSCILLATOR DOES NOT RECOGNIZE KEY) Click here

    A

  9. INSPECT POWER SWITCH


    1. Inspect the power switch Click here.


    NG

    REPLACE POWER SWITCH Click here

    OK

  10. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - POWER SWITCH)


    1. Disconnect the F86 certification ECU (smart key ECU assembly) connector.

    2. Disconnect the F42 power switch connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F86-28 (SSW1) - F42-5 (SS1) Always Below 1 Ω
      F86-30 (SSW2) - F42-1 (SS2) Always Below 1 Ω
      F86-28 (SSW1) - Body ground Always 10 kΩ or higher
      F86-30 (SSW2) - Body ground Always 10 kΩ or higher

    OK

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  11. INSPECT STOP LIGHT SWITCH ASSEMBLY


    1. Inspect the stop light switch assembly Click here


    NG

    REPLACE STOP LIGHT SWITCH ASSEMBLY Click here

    OK

  12. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - STOP LIGHT SWITCH ASSEMBLY


    1. Disconnect the F88 certification ECU (smart key ECU assembly) connector.

    2. Disconnect the A23 stop light switch assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F88-18 (STP1) - A23-1 (L) Always Below 1 Ω
      F88-18 (STP1) - Body ground Always 10 kΩ or higher

    4. Reconnect the F88 certification ECU (smart key ECU assembly) connector.

    5. A004FD7E01
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Stop Light Switch Assembly)

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      A23-2 (B) - Body ground Power switch off 11 to 14 V

    OK

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  13. CHECK HARNESS AND CONNECTOR (STOP LIGHT SWITCH ASSEMBLY - POWER SOURCE AND BODY GROUND)


    1. A004GDJE01
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Stop Light Switch Assembly)

      Disconnect the stop light switch assembly connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      A50-7 (B) - A50-2 (GND) Power switch off 11 to 14 V
      Standard Resistance
      Tester Connection Condition Specified Condition
      A50-2 (GND) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  14. INSPECT STOP LIGHT SWITCH ASSEMBLY


    1. A004F4PE01
      Text in Illustration
      *a

      Component with harness connected

      (Stop Light Switch Assembly)

      Reconnect the stop light switch assembly connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      A50-3 (L) - A50-2 (GND) Power switch off, Brake pedal not depressed Below 1 V
      A50-3 (L) - A50-2 (GND) Power switch off, Brake pedal depressed 11 to 14 V

    NG

    REPLACE STOP LIGHT SWITCH ASSEMBLY Click here

    OK

  15. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - STOP LIGHT SWITCH ASSEMBLY


    1. Disconnect the A50*1 or A23*2 stop light switch assembly connector.


      • *1: for LED Type Stop Light

      • *2: for Bulb Type Stop Light

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

      Standard Resistance
      for LED Type Stop Light
      Tester Connection Condition Specified Condition
      F88-18 (STP1) - A50-3 (L) Always Below 1 Ω
      F88-18 (STP1) - Body ground Always 10 kΩ or higher
      for Bulb Type Stop Light
      Tester Connection Condition Specified Condition
      F88-18 (STP1) - A23-1 (L) Always Below 1 Ω
      F88-18 (STP1) - Body ground Always 10 kΩ or higher

    3. Reconnect the A50*1 or A23*2 stop light switch assembly connector.


      • *1: for LED Type Stop Light

      • *2: for Bulb Type Stop Light

    4. A01V0T9E02
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Certification ECU (Smart Key ECU Assembly))

      Disconnect the F88 certification ECU (smart key ECU assembly) connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      F88-18 (STP1) - Body ground Brake pedal released 1 V or less
      Brake pedal depressed 9 V or higher

    OK

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  16. CHECK FOR DTC


    1. Check for DTCs Click here.

      Result
      Result Proceed to

      The following DTCs are not output:


      • B2785

      • B2287

      • B2784

      • B278A

      		 A
      DTC B2785 is not output but DTC B2287 is output. B
      DTCs other than B2287 are output. C

    A

    REPLACE ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY

    B

    GO TO DIAGNOSTIC TROUBLE CODE CHART (DTC B2287) Click here

    C

    GO TO DIAGNOSTIC TROUBLE CODE CHART Click here