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

DESCRIPTION

When the entry door lock and unlock functions and the wireless door lock and unlock functions do not operate, radio wave interference, or a malfunction in the key or signal circuit between the door control receiver assembly and certification ECU (smart key ECU assembly) is suspected. The signal circuit is shared by the entry function and wireless door lock function.

WIRING DIAGRAM

A005GJ9E02

CAUTION / NOTICE / HINT

Note


  • The entry and start system (for entry function) uses a LIN communication system and CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting Click here. Troubleshoot the entry and start system (for entry function) after confirming that the communication system is functioning properly.

  • When using the intelligent tester with the engine 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.

  • When checking the entry lock operation multiple times, the lock operation may be limited to 2 consecutive operations depending on the settings. In order to perform the entry lock operation 3 or more times, an unlock operation must be performed once (any type of unlock operation is sufficient). However, only consecutive entry lock operations are limited. Using the wireless lock or other types of lock operations, it is possible to perform consecutive lock operations without this limitation.

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

  • After repair, confirm DTC not reoccur with performing the "DTC Output Confirmation Operation".

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

  • Initialization is necessary when the main body ECU (multiplex network body ECU) is replaced* Click here.


PROCEDURE


  1. INSPECT BATTERY VOLTAGE


    1. Measure the voltage of the battery.

      Standard voltage
      11 to 14 V

      Tech Tips

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

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


    NEXT

  2. CHECK for DTC


    1. Open the driver side 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 engine 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 OPERATION


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

      OK
      Door locks operate normally.

    NG

    GO TO POWER DOOR LOCK CONTROL SYSTEM (Proceed to Problem Symptoms Table) Click here

    OK

  4. CHECK ELECTRICAL KEY TRANSMITTER


    1. Check if another registered key is available.

      Result
      Result Proceed to
      Another registered key is not available. A
      Another registered key is available. B

    B

    CHECK ELECTRICAL KEY TRANSMITTER (OPERATION) Click here

    A

  5. REGISTER ELECTRICAL KEY TRANSMITTER


    1. Register a new electrical key transmitter.


    NEXT

  6. CHECK ELECTRICAL KEY TRANSMITTER (OPERATION)


    1. Using the key registered in the previous step or another registered key, check that the entry function operates normally Click here.

      OK
      Entry function operates normally.

    NG

    CHECK WAVE ENVIRONMENT Click here

    OK

  7. 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 engine by holding the key against the engine switch, depressing the brake pedal and pressing the engine switch.


    B

    REPLACE ELECTRICAL KEY TRANSMITTER

    C

    REPLACE TRANSMITTER BATTERY Click here

    A

  8. INSPECT TRANSMITTER BATTERY (VOLTAGE)


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

    2. A005JOXE01
      Text in Illustration
      *1 Lead Wire

      Attach a lead wire (0.60 mm [0.027 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. A005ISSE02
      Text in Illustration
      *a 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 (-) Engine 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

  9. 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

  10. READ VALUE USING INTELLIGENT TESTER


    1. Connect the intelligent tester to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the intelligent tester on.

    4. Enter the following menus: Body / Main Body / Data List.

    5. Read the Data List according to the display on the intelligent tester.

      Main Body
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      ACC SW Engine switch on (ACC) / ON or OFF

      ON: Engine switch on (ACC)

      OFF: Engine switch off

      		 -
      IG SW Engine switch on (IG) / ON or OFF

      ON: Engine switch on (ACC)

      OFF: Engine switch off

      		 -
      OK
      On the intelligent tester screen, the display changes between ON and OFF as shown in the table above.

    NG

    GO TO ENTRY AND START SYSTEM (for Start Function) (Proceed to How to Proceed with Troubleshooting) Click here

    OK

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


    1. A005JL1E01
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Certification ECU (smart key ECU assembly))

      Disconnect the F65 certification ECU (smart key ECU assembly) connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      F65-10 (CUTB) - Body ground Always 11 to 14 V
      Standard Resistance
      Tester Connection Condition Specified Condition
      F65-11 (E) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  12. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - DOOR CONTROL RECEIVER)


    1. Disconnect the F64 certification ECU (smart key ECU assembly) connector.

    2. Disconnect the K10 door control receiver assembly connector.

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

      Standard Resistance (Check for Open)
      Tester Connection Condition Specified Condition
      F64-5 (RCO) - K10-4 (+5) Always Below 1 Ω
      F64-17 (RDAS) - K10-5 (DATA) Always Below 1 Ω
      F64-19 (RSSI) - K10-2 (RSSI) Always Below 1 Ω
      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition
      F64-5 (RCO) - Body ground Always 10 kΩ or higher
      F64-17 (RDAS) - Body ground Always 10 kΩ or higher
      F64-19 (RSSI) - Body ground Always 10 kΩ or higher
      K10-4 (+5) - Body ground Always 10 kΩ or higher
      K10-5 (DATA) - Body ground Always 10 kΩ or higher
      K10-2 (RSSI) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  13. CHECK DOOR CONTROL RECEIVER (GND)


    1. Reconnect the K10 door control receiver assembly connector.

    2. Reconnect the F64 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
      K10-1 (GND) - Body ground Always Below 1 Ω

    NG

    REPLACE DOOR CONTROL RECEIVER Click here

    OK

  14. CHECK DOOR CONTROL RECEIVER (POWER SOURCE)


    1. A005JY7E01
      Text in Illustration
      *a

      Component with harness connected

      (Door control receiver)

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      K10-4 (+5) - K10-1 (GND) Engine switch off, lock or unlock switch of electrical key transmitter not pressed → pressed Below 1 V → 4.5 to 5.5 V

    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    OK

  15. CHECK DOOR CONTROL RECEIVER


    1. A005MHPE01
      Text in Illustration
      *a

      Component with harness connected

      (Door control receiver)

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      K10-5 (DATA) - K10-1 (GND) All doors closed and locked, lock or unlock switch of electrical key transmitter not pressed → pressed 11 to 14 V → Below 2 V → 11 to 14 V pulse generation output at regular interval
      K10-2 (RSSI) - K10-1 (GND) All doors closed and locked, lock or unlock switch of electrical key transmitter not pressed → pressed 11 to 14 V → Below 2 V

    NG

    REPLACE DOOR CONTROL RECEIVER Click here

    OK

  16. REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)


    1. Temporarily replace the certification ECU (smart key ECU assembly) with a new or normally functioning one.


    NEXT

  17. CHECK DOOR CONTROL RECEIVER ASSEMBLY (OPERATION)


    1. Check that the wireless function and entry function operate normally.

      OK
      Wireless and entry functions operate normally.

    OK

    END (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) WAS DEFECTIVE)

    NG

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Click here