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

DESCRIPTION

When the engine switch cannot be turned on (ACC) or on (IG), there may be a malfunction in interior certification, or the ACC relay or IG relay system. If interior certification does not succeed, the certification ECU (smart key ECU assembly) may be malfunctioning, or communication may not be possible between the No. 1 indoor electrical key antenna assembly (front floor) or No. 2 indoor electrical key antenna assembly (rear floor), the electrical key transmitter sub-assembly, and the door control receiver.

When the electrical key transmitter sub-assembly is brought into the cabin, the key ID code sent from the electrical key transmitter sub-assembly and the key ID code stored in the certification ECU (smart key ECU assembly) are certified. If these codes do not match and certification fails, the engine switch cannot be turned on (ACC) or on (IG).

When the door is unlocked and the electrical key transmitter sub-assembly is brought into the cabin, the certification ECU (smart key ECU assembly) activates the indoor electrical key antenna and forms a detection area. When the electrical key transmitter sub-assembly is recognized inside the detection area, it returns the key ID code. This is received by the door control receiver, which then sends it to the certification ECU (smart key ECU assembly).

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

  • IG Relay Monitor (Inside)

  • ACC Relay Monitor

  • IG Relay Monitor (Outside)

  • Latch Circuit

  • Power Supply Condition

WIRING DIAGRAM

Figure 1. for LHD:

B006DSOE02

Figure 2. for RHD:

B006A18E05
B006GCUE07
*a No. 1 Indoor Electrical Key Antenna (Front Floor)
*b No. 2 Indoor Electrical Key Antenna (Rear Floor)
*c Certification ECU (Smart Key ECU Assembly)

CAUTION / NOTICE / HINT

Note


  • When using the GTS with the engine 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. 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.

  • 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 the Service Bulletin.

    Click here

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

  • After repair, confirm that no DTCs are output by performing "DTC Output Confirmation Operation".

  • An antenna coil is connected between the terminals of the indoor electrical key antenna.

  • The door control receiver is also involved in interior certification.

Tech Tips


  • If interior certification does not succeed, the History of Reason for Operation may remain in the certification ECU (smart key ECU assembly).

  • If the operation history remains, refer to the history table to determine the conditions and narrow down any trouble areas.


Body Electrical > Entry&Start > Utility
Tester Display
Operation History

PROCEDURE


  1. CHECK PUSH-BUTTON START FUNCTION


    1. Get into the vehicle while carrying the electrical key transmitter sub-assembly that has already been registered.

    2. Change the shift state to park (P).

    3. Check that the power source mode changes when the engine switch is pressed without depressing the brake pedal.

      Click here

      Result
      Result Proceed to
      Power source mode changes only when the electrical key transmitter sub-assembly is inside the push-button start function operation range for the rear side A
      Power source mode changes only when the electrical key transmitter sub-assembly is inside the push-button start function operation range for the front side B
      Power source mode does not change C

    B

    CHECK WAVE ENVIRONMENT Click here

    C

    CHECK TRANSMITTER BATTERY Click here

    A

  2. 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.

      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).

      Click here

      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.

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

    OK

    AFFECTED BY WAVE INTERFERENCE

    NG

  3. CHECK KEY DIAGNOSTIC MODE


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / Entry&Start / Utility / Communication Check(Key Diag Mode).

    5. B006CFGC03
      *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.

      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 No. 1 indoor electrical key antenna assembly (front floor) is operating by the sounding of the buzzer.

      • When the wireless buzzer does not sound for No. 1 indoor electrical key antenna assembly (front floor), it can be judged that the certification ECU (smart key ECU assembly), which controls the No. 1 indoor electrical key antenna assembly (front floor), is malfunctioning.


      Body Electrical > Entry&Start > Utility
      Tester Display
      Communication Check(Key Diag Mode)
      Result
      Result Proceed to
      The wireless buzzer sounds A
      The wireless buzzer does not sound B

    B

    AFFECTED BY WAVE INTERFERENCE

    A

  4. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - NO. 1 INDOOR ELECTRICAL KEY ANTENNA ASSEMBLY (FRONT FLOOR))


    1. Disconnect the G71 certification ECU (smart key ECU assembly) connector.

    2. Disconnect the G44 No. 1 indoor electrical key antenna assembly (front floor) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      G71-8 (CLG5) - G44-1 (ANTE5) Always Below 1 Ω
      G71-9 (CG5B) - G44-3 (CLGB) Always Below 1 Ω
      G71-8 (CLG5) or G44-1 (ANTE5) - Other terminals and body ground Always 10 kΩ or higher
      G71-9 (CG5B) or G44-3 (CLGB) - Other terminals and body ground Always 10 kΩ or higher

    4. Reconnect the G71 certification ECU (smart key ECU assembly) connector.

      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) (OUTPUT TO NO. 1 INDOOR ELECTRICAL KEY ANTENNA ASSEMBLY (FRONT FLOOR))


    1. B006GIHC01
      *a Waveform
      *b For 30 seconds after closing any door
      *c After 30 seconds or more have elapsed since any door closed

      Using an oscilloscope, check the waveform.

      OK
      Tester Connection Condition Tool Setting Specified Condition
      G44-1 (ANTE5) - G44-3 (CLGB)

      Procedure:


      1. Engine 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)
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE NO. 1 INDOOR ELECTRICAL KEY ANTENNA ASSEMBLY (FRONT FLOOR) Click here

    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

  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. 2 indoor electrical key antenna assembly (rear floor) and perform an entry and start system check.

      Tech Tips

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

      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).

      Click here

      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.

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

    OK

    AFFECTED BY WAVE INTERFERENCE

    NG

  7. CHECK KEY DIAGNOSTIC MODE


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / Entry&Start / Utility / Communication Check(Key Diag Mode).

    5. B006FA7C01
      *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.

      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 No. 2 indoor electrical key antenna assembly (rear floor) is operating by the sounding of the buzzer.

      • When the wireless buzzer does not sound for No. 2 indoor electrical key antenna assemby (rear floor), it can be judged that the certification ECU (smart key ECU assembly), which controls the No. 2 indoor electrical key antenna assembly (rear floor), is malfunctioning.


      Body Electrical > Entry&Start > Utility
      Tester Display
      Communication Check(Key Diag Mode)
      Result
      Result Proceed to
      The wireless buzzer sounds A
      The wireless buzzer does not sound B

    B

    AFFECTED BY WAVE INTERFERENCE

    A

  8. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - NO. 2 INDOOR ELECTRICAL KEY ANTENNA ASSEMBLY (REAR FLOOR))


    1. Disconnect the L31 certification ECU (smart key ECU assembly) connector.

    2. Disconnect the L65 No. 2 indoor electrical key antenna assembly (rire floor) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      L31-5 (CLG6) - L65-1 (ANTE6) Always Below 1 Ω
      L31-6 (CG6B) - L65-3 (CLGB) Always Below 1 Ω
      L31-5 (CLG6) or L65-1 (ANTE6) - Other terminals and body ground Always 10 kΩ or higher
      L31-6 (CG6B) or L65-3 (CLGB) - Other terminals and body ground Always 10 kΩ or higher

    4. Reconnect the L31 certification ECU (smart key ECU assembly) connector.

      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. B006GIHC01
      *a Waveform
      *b For 30 seconds after closing any door
      *c After 30 seconds or more have elapsed since any door closed

      Using an oscilloscope, check the waveform.

      OK
      Tester Connection Condition Tool Setting Specified Condition
      L65-1 (ANTE6) - L65-3 (CLGB)

      Procedure:


      1. Engine 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)
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE NO. 2 INDOOR ELECTRICAL KEY ANTENNA ASSEMBLY (REAR FLOOR) Click here

    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

  10. CHECK TRANSMITTER BATTERY


    1. Check the transmitter battery level of the electrical key transmitter sub-assembly that was checked first.


      1. Press and hold the lock switch of the electrical key transmitter sub-assembly for 5 seconds and check the number of times that the LED illuminates.

        Tech Tips


        • The electrical key transmitter sub-assembly sends voltage information to the certification ECU (smart key ECU assembly) when it is being used. "Yes" is displayed for the Data List item "Key Low Battery" when this voltage information indicates 2.2 V or less.

          Click here

        • Even if the transmitter battery is depleted, it is still possible to start the engine by holding the electrical key transmitter sub-assembly near the engine switch, depressing the brake pedal and pressing the engine switch.

      Result
      Result Proceed to
      LED illuminates 3 times or more when switch is pressed and held A
      LED does not illuminate when switch is pressed and held B
      LED illuminates once or twice but not a third time C

    B

    INSPECT TRANSMITTER BATTERY Click here

    C

    REPLACE TRANSMITTER BATTERY Click here

    A

  11. CHECK ENTRY LOCK / UNLOCK FUNCTION


    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 lock/unlock functions operate normally A
      An entry lock/unlock functions does not operate normally B

    B

    GO TO ENTRY AND START SYSTEM (for Entry Function) (All door entry lock/unlock functions and wireless functions do not operate) Click here

    A

  12. READ VALUE USING GTS (START SWITCH1, START SWITCH2)


    1. Connect the GTS to the DLC3.

    2. Turn the engine 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 Engine switch 1 status OFF or ON

      OFF: Engine switch not pressed

      ON: Engine switch pressed

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

      • Use this item to determine if the engine switch input signal is malfunctioning.
      Start Switch2 Engine switch 2 status OFF or ON

      OFF: Engine switch not pressed

      ON: Engine switch pressed

      • Backup for engine switch 1. However, when the engine switch is pressed and held, the power source mode can only be changed when both engine switch 1 and 2 are normal.

      • Behaves the same way as engine 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 engine switch operation.
      Result
      Proceed to
      OK
      NG

    NG

    INSPECT ENGINE SWITCH Click here

    OK

  13. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)


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

      B006E2SC09
      *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: Engine switch off

      ACC ON: Engine switch on (ACC)

      IG ON: Engine switch on (IG)

      ST ON: Sending engine start request signal

      		 -

      Body Electrical > Power Source Control > Data List
      Tester Display
      Power Supply Condition
      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      G71-17 (IG1D) - Body ground Engine switch off 1 V or less
      Engine switch on (ACC)
      Engine switch on (IG) 9 V or higher
      G71-16 (ACCD) - Body ground Engine switch off 1 V or less
      Engine switch on (ACC) 8.5 V or higher
      Engine switch on (IG)
      Result
      Proceed to
      OK
      NG

    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    OK

  14. CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - BODY GROUND)


    1. B006B6LC07
      *a

      Front view of wire harness connector

      (to Instrument Panel Junction Block Assembly)

      Disconnect the instrument panel junction block assembly connector.

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

      Standard Resistance
      for LHD:
      Tester Connection Condition Specified Condition
      5D-6 - Body ground Always Below 1 Ω
      for RHD:
      Tester Connection Condition Specified Condition
      5D-7 - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  15. INSPECT ENGINE SWITCH


    1. Remove the engine switch.

      Click here

    2. Inspect the engine switch.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE ENGINE SWITCH Click here

    OK

  16. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - ENGINE SWITCH)


    1. Disconnect the G71 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
      G71-23 (SSW1) - A-5 (SS1) Always Below 1 Ω
      G71-21 (SSW2) - A-1 (SS2) Always Below 1 Ω
      G71-11 (AGND) - A-6 (AGND) Always Below 1 Ω
      G71-23 (SSW1) or A-5 (SS1) - Other terminals and body ground Always 10 kΩ or higher
      G71-21 (SSW2) or A-1 (SS2) - Other terminals and body ground Always 10 kΩ or higher
      G71-11 (AGND) or A-6 (AGND) - Other terminals and body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  17. INSPECT TRANSMITTER BATTERY


    1. Inspect the transmitter battery.

      Click here

      Note

      Do not wrap the lead wire around 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

    REPLACE ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY

    NG

    REPLACE TRANSMITTER BATTERY Click here