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

DESCRIPTION

When the key is in the vehicle and the power switch is pressed, the power management control ECU receives a signal and changes the power source mode.

Tech Tips


  • When the power management control ECU is replaced with a new one and the cable is connected to the negative (-) auxiliary battery terminal, the power source mode changes to on (IG).

  • When the auxiliary battery cable is disconnected and reconnected, the power source returns to the mode it was in before the auxiliary battery cable was disconnected.

WIRING DIAGRAM

A005EJBE05

CAUTION / NOTICE / HINT

Note


  • When using the GTS with the power switch off, perform either of the following: 1) Turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the GTS and vehicle begins, or 2) connect the GTS to the vehicle, select the vehicle type under manual mode, and then enter the following menus:

    for Power Source Control: Body Electrical / Power Source Control / Trouble Codes.

    for Entry&Start: Body Electrical / Entry&Start / Trouble Codes.

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

  • 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.

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

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

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

Tech Tips

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

  • Key Certif Wait T-Out

-

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (AUXILIARY BATTERY - POWER MANAGEMENT CONTROL ECU)


    1. Disconnect the L5 and L6 connectors from the power management control ECU.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      L5-1 (AM22) - Body ground Always 9.5 to 16 V
      L6-7 (AM21) - Body ground Always 9.5 to 16 V

    NG
    OK
  2. CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - BODY GROUND)


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

      Standard Resistance
      Tester Connection Condition Specified Condition
      L5-5 (E01) - Body ground Always Below 1 Ω
      L5-6 (E1) - Body ground Always Below 1 Ω
      L6-4 (E12) - Body ground Always Below 1 Ω
      L6-5 (E02) - Body ground Always Below 1 Ω

    NG
    OK
  3. READ VALUE USING GTS


    1. Reconnect the L5 and L6 connectors to the power management control ECU.

    2. Turn the power switch off.

    3. Connect the GTS to the DLC3.

    4. Turn the power switch on (IG).

    5. Turn the GTS on.

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

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

      Power Source Control
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Key Certif Wait T-Out Key verification malfunction/No or Yes

      No: Verification normal

      Yes: Verification error (detected when ID code from key and ID stored in certification ECU (smart key ECU assembly) do not match)

      The hybrid control system can be started, even if this item displays "Yes".
      OK
      When more than 1 second elapses after the power switch is turned from off to on (IG), No is displayed in the Data List.

    NG
    OK
  4. READ VALUE USING GTS


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

      Power Source Control
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Start Switch1 Condition of power switch contact 1/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 Condition of power switch contact 2/OFF or ON

      OFF: Power switch not pressed

      ON: Power switch pressed


      • This is the backup for power switch 1.

      • Behaves the same way as power switch 1.

      OK
      ON (power switch is pushed) and OFF (power switch is not pushed) appear on the screen.

    NG
    OK
  5. CHECK POWER MANAGEMENT CONTROL ECU


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

      Power Source Control
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Power Supply Condition State of power supply/All OFF, ACC ON, IG1 ON, IG2 ON, ST ON

      All OFF: Power switch off (power supply off)

      ACC ON: Power switch on (ACC) (ACC relay on)

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

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

      ST ON: Starting hybrid control system

      Since "IG1 ON" and "IG2 ON" turn "on" at approximately the same time, "IG1 ON" may not be displayed ("IG1 ON" turns on for a very short time).
    2. Measure the voltage while checking the Data List on the GTS.

      Standard Voltage
      Tester Connection Condition Specified Condition
      L6-2 (IG1D) - Body ground Power switch off Below 1 V
      L6-2 (IG1D) - Body ground Power switch on (ACC) Below 1 V
      L6-2 (IG1D) - Body ground Power switch on (IG) Output voltage at terminal AM21 or AM22 is -2 V or more
      A22-2 (IG2D) - Body ground Power switch off Below 1 V
      A22-2 (IG2D) - Body ground Power switch on (ACC) Below 1 V
      A22-2 (IG2D) - Body ground Power switch on (IG) Output voltage at terminal AM21 or AM22 is -2 V or more
      L6-1 (ACCD) - Body ground Power switch off Below 1 V
      L6-1 (ACCD) - Body ground Power switch on (IG) Output voltage at terminal AM21 or AM22 is -2 V or more
      L6-1 (ACCD) - Body ground Power switch on (ACC) Output voltage at terminal AM21 or AM22 is -2 V or more

    NG
    OK
  6. CONFIRMATION TEST


    1. Check that the power source mode becomes on (ACC) and on (IG) when the power switch is operated.

      OK
      Power source mode becomes on (ACC) and on (IG) when the power switch is operated.

    OK
    NG
  7. CHECK POWER SWITCH


    1. A0059YZE02
      Text in Illustration
      *a

      Component without harness connected

      (Power Switch)

      Remove the power switch Click here.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      L43-7 (SS1) - L43-5 (GND) Pushed Below 1 Ω
      L43-7 (SS1) - L43-5 (GND) Not pushed 10 kΩ or higher
      L43-2 (SS2) - L43-5 (GND) Pushed Below 1 Ω
      L43-2 (SS2) - L43-5 (GND) Not pushed 10 kΩ or higher

    NG
    OK
  8. CHECK HARNESS AND CONNECTOR (POWER SWITCH - POWER MANAGEMENT CONTROL ECU AND BODY GROUND)


    1. Disconnect the L5 and L6 connectors from the power management control ECU.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      L6-17 (SSW2) - L43-2 (SS2) Always Below 1 Ω
      L5-7 (SSW1) - L43-7 (SS1) Always Below 1 Ω
      L6-17 (SSW2) - Body ground Always 10 kΩ or higher
      L5-7 (SSW1) - Body ground Always 10 kΩ or higher

    OK
    NG
  9. CHECK FOR DTC


    1. Enter the following menus:

      for Power Source Control: Body Electrical / Power Source Control / Trouble Codes.

      for Entry&Start: Body Electrical / Entry&Start / Trouble Codes.

    2. Check for DTCs.

      Result
      Result Proceed to

      The following DTCs are not output:


      • B2785

      • B2287

      • B2784

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

    A
    B
    C