ENTRY AND START SYSTEM(for Entry Function) All Door Entry Lock/Unlock Functions and Wireless Functions do not Operate

DESCRIPTION

When the entry operation and wireless operation of the door lock functions do not operate, a malfunction or wave interference may be occurring in either of the following: 1) the signal communication line between the door control receiver and certification ECU (smart key ECU assembly) (the line used for entry and wireless operations); or 2) the electrical key transmitter. If the entry lock and wireless lock operations cannot be performed, there may be key malfunctions, wave interference or problems in the communication which is used for the entry and wireless function between the door control receiver and certification ECU (smart key ECU assembly).

WIRING DIAGRAM

B001M4GE21

CAUTION / NOTICE / HINT

Note


  • The entry and start system (for Entry Function) uses the CAN communication system and LIN communication system. First inspect the communication systems by following How to Proceed with Troubleshooting Click here. Troubleshoot the entry and start system (for Entry Function) after confirming that the communication systems are functioning properly.

  • When using the intelligent tester with the power switch off to troubleshoot:

    Connect the intelligent tester to the DLC3 and turn a courtesy light switch on and off at 1.5-second intervals until communication between the intelligent tester and vehicle begins.

  • Check that there are no electrical key transmitters in the vehicle.

  • Before performing the inspection, check that DTC B1242 (wireless door lock control) is not output Click here.

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

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

  • Door control receiver has a constant voltage (5 V) supply circuit connected to terminal "+5".

  • When only the key (for card type) does not operate the entry lock/unlock functions for all doors, it can be suspected that the key (for card type) is malfunctioning or its auxiliary battery is depleted. Refer to Problem Symptoms Table Click here.

PROCEDURE


  1. INSPECT AUXILIARY BATTERY VOLTAGE


    1. Measure the voltage of the auxiliary battery with the power switch off.

      Standard voltage
      11 to 14 V

      Tech Tips

      It may be possible to tell whether the auxiliary battery is depleted by operating the horn.


      • If the voltage is below 11 V, recharge or replace the auxiliary battery before proceeding.


    NEXT

  2. CHECK FOR DTC


    1. Open the driver door using the mechanical key built into the electrical key transmitter.

    2. Connect the intelligent tester and check for DTCs Click here.

      Tech Tips

      When using the intelligent tester with the power switch off to troubleshoot: Connect the intelligent tester to the DLC3 and turn a courtesy light switch on and off at 1.5-second intervals until communication between the intelligent tester and vehicle begins.

      OK
      DTC is not output.

    NG

    GO TO DIAGNOSTIC TROUBLE CODE CHART Click here

    OK

  3. CHECK POWER DOOR LOCK CONTROL SYSTEM


    1. When the door control switch on the multiplex network master switch assembly on the driver door is operated, check that the doors unlock and lock according to the switch operation Click here.

      OK
      Door locks operate normally.

    NG

    GO TO POWER DOOR LOCK CONTROL SYSTEM Click here

    OK

  4. CHECK ELECTRICAL KEY TRANSMITTER


    1. When another registered electrical key transmitter is used, check that the wireless and entry functions operate normally Click here.

      Result
      Result Proceed to
      Entry function operates A
      Entry function does not operate B

    B

    CHECK WAVE ENVIRONMENT Click here

    A

  5. CHECK ELECTRICAL KEY TRANSMITTER (LED)


    1. Press and hold the lock switch of the transmitter for 5 seconds and check the number of times that the transmitter LED illuminates.

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

      Tech Tips


      • The key sends voltage information to the certification ECU (smart key ECU assembly) when it is being used. The certification ECU (smart key ECU assembly) displays "Yes" for the "Key Low Battery" item of the Data List when this voltage information indicates 2.1 V or less Click here.

      • Even if the key battery is depleted, it is still possible to start the hybrid control system by holding the key against the power switch, depressing the brake pedal and pressing the power switch.


    B

    REPLACE ELECTRICAL KEY TRANSMITTER

    C

    REPLACE TRANSMITTER BATTERY Click here

    A

  6. INSPECT TRANSMITTER BATTERY (VOLTAGE)


    1. Inspect the transmitter battery (for Type A)


      1. B001MIXE03
        Text in Illustration
        *1 Lead Wire

        Remove the battery from the electrical key transmitter that does not operate Click here.

      2. Attach a lead wire (0.60 mm [0.0236 in.] in diameter or less including wire sheath) with tape or equivalent to the negative terminal.

        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 battery will not be able to be installed correctly.

      3. Carefully pull the lead wire out from the position shown in the illustration and install the previously removed transmitter battery.

      4. B001L65E02
        Text in Illustration
        *1 GND

        Measure the voltage of the transmitter battery.

        Tech Tips


        • When measuring the battery voltage, bring the electrical key transmitter within the lock entry operating range while operating the lock sensor of a door handle to perform the measurement. For the entry lock operating range, refer to System Description Click here.

        • Perform the measurement when the key is at room temperature.

        • The key sends voltage information to the certification ECU (smart key ECU assembly) when it is transmitting. When this voltage is 2.1 V or less the Data List item "Key Low Battery" displays "Yes".

        Standard Voltage
        Tester Connection Condition Specified Condition
        Battery positive (+) - Battery negative (-) Power switch off, all doors closed and lock sensor touched 2.2 to 3.2 V

    2. Inspect the transmitter battery (for Type B)


      1. B001LKJE01
        Text in Illustration
        *1 Lead Wire

        Remove the battery from the electrical key transmitter that does not operate Click here.

      2. Attach a lead wire (0.60 mm [0.0236 in.] in diameter or less including wire sheath) with tape or equivalent to the negative terminal.

        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 battery will not be able to be installed correctly.

      3. Carefully pull the lead wire out from the position shown in the illustration and install the previously removed transmitter battery.

      4. B001KB7E03
        Text in Illustration
        *1 GND

        Measure the voltage of the transmitter battery.

        Tech Tips


        • When measuring the battery voltage, bring the electrical key transmitter within the lock entry operating range while operating the lock sensor of a door handle to perform the measurement. For the entry lock operating range, refer to System Description Click here.

        • Perform the measurement when the key is at room temperature.

        • The key sends voltage information to the certification ECU (smart key ECU assembly) when it is transmitting. When this voltage is 2.1 V or less the Data List item "Key Low Battery" displays "Yes".

        Standard Voltage
        Tester Connection Condition Specified Condition
        Battery positive (+) - Battery negative (-) Power switch off, all doors closed and lock sensor touched 2.2 to 3.2 V

    OK

    REPLACE ELECTRICAL KEY TRANSMITTER

    NG

    REPLACE TRANSMITTER BATTERY Click here

  7. CHECK WAVE ENVIRONMENT


    1. Bring the electrical key transmitter near the door control receiver and perform a wireless and entry function operation check.

      Tech Tips


      • When the electrical key transmitter is brought near the door control receiver, the possibility of electric wave interference decreases, and it can be determined if electric wave interference is causing the problem symptom.

      • 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 electric 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 electric 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 key detection area) and RF band (used by the key for transmission) to check for locations where there is wave interference.

      OK
      Wireless and entry functions operate normally.

    OK

    AFFECTED BY WAVE INTERFERENCE

    NG

  8. CHECK POWER SOURCE


    1. When the power source mode is off, check that the functions other than the entry functions recognize the power source mode as being off.

      Tech Tips


      • Check if systems that should not be operating when the power source mode is off are operating.

      • When the certification ECU (smart key ECU assembly) mistakenly determines the power source mode to be on (IG) for some reason (example: an ECU mistakenly determines the power source mode to be on (IG) and sends that information to the certification ECU (smart key ECU assembly)) even though the power source mode is off, the certification ECU (smart key ECU assembly) stops the entry and wireless functions.

      OK
      When the power source mode is off, functions other than the entry functions recognize the power source mode as being off.

    NG

    GO TO ENTRY AND START SYSTEM (FOR START FUNCTION) Click here

    OK

  9. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - AUXILIARY BATTERY AND BODY GROUND)


    1. B001L0DE02
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Certification ECU (Smart Key ECU Assembly))

      Disconnect the H1 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
      H1-17 (CUTB) - Body ground Always 11 to 14 V
      H1-1 (+B) - Body ground Always 11 to 14 V

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H1-15 (E) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  10. CHECK HARNESS AND CONNECTOR (DOOR CONTROL RECEIVER - CERTIFICATION ECU AND BODY GROUND)


    1. Disconnect the Q8 door control receiver connector.

    2. Disconnect the H2 certification ECU (smart key ECU assembly) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      Q8-4 (+5) - H2-5 (RCO) Always Below 1 Ω
      Q8-5 (DATA) - H2-15 (RDA) Always Below 1 Ω
      Q8-2 (RSSI) - H2-16 (RSSI) Always Below 1 Ω
      Q8-1 (GND) - Body ground Always Below 1 Ω
      Q8-4 (+5) or H2-5 (RCO) - Body ground Always 10 kΩ or higher
      Q8-5 (DATA) or H2-15 (RDA) - Body ground Always 10 kΩ or higher
      Q8-2 (RSSI) or H2-16 (RSSI) - Body ground Always 10 kΩ or higher

      Tech Tips

      For the waveforms between the certification ECU (smart key ECU assembly) and door control receiver when the key is operated, refer to Terminals of ECU Click here.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  11. CHECK DOOR CONTROL RECEIVER (OPERATION)


    1. Temporarily replace the door control receiver with a new or normally functioning one Click here.

    2. Check that the wireless and entry functions operate normally.

      OK
      Wireless and entry functions operate normally.

    OK

    END (DOOR CONTROL RECEIVER WAS DEFECTIVE)

    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)