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 (the line is used by entry and wireless operations); or 2) the electrical key transmitter.

WIRING DIAGRAM

A0094ZIE07

INSPECTION PROCEDURE

Note


  • The entry and start system (for Entry Function) uses a multiplex communication system (LIN communication system) and the 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 systems are 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, refer to the Service Bulletin.

PROCEDURE


  1. CHECK POWER DOOR LOCK CONTROL SYSTEM


    1. When the door control switch on the multiplex network master switch assembly 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

  2. 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

  3. CHECK ELECTRICAL KEY TRANSMITTER (LED)


    1. Check that the transmitter LED illuminates 3 times when a switch is pressed 3 times.

      Result
      Result Proceed to
      Transmitter LED does not illuminate when switch is pressed 3 times A
      Transmitter LED illuminates 3 times when switch is pressed 3 times B
      Transmitter LED does not illuminate second or third time C

      Tech Tips

      If the transmitter LED does not illuminate the second or third time, replace the transmitter battery as it is depleted.


    B

    REPLACE ELECTRICAL KEY TRANSMITTER

    C

    REPLACE TRANSMITTER BATTERY Click here

    A

  4. INSPECT TRANSMITTER BATTERY (VOLTAGE)


    1. A009AQKE01
      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 (0.6 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. A0099CYE01
      Text in Illustration
      *1 Measurement Point

      Using an oscilloscope, check the transmitter battery voltage waveform.

      Tech Tips

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

      Standard Voltage
      Item Content
      Tester Connection Battery positive (+) - Battery negative (-)
      Tool Setting 0.5 V/DIV., 100 ms/DIV.
      Condition Engine switch off, all doors closed and lock sensor touched
      Specified Condition 2.5 to 3.2 V (Refer to waveform)

    NG

    REPLACE TRANSMITTER BATTERY Click here

    OK

    REPLACE ELECTRICAL KEY TRANSMITTER

  5. 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 wave interference decreases, and it can be determined if 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.

      OK
      Wireless and entry functions operate normally.

    NG

    CHECK POWER SOURCE Click here

    OK

    AFFECTED BY WAVE INTERFERENCE

  6. CHECK POWER SOURCE


    1. Check that the combination meter display turns off when the engine switch is turned off.

      OK
      Combination meter turns off.

      Tech Tips

      This confirms that systems other than the entry and start system are correctly detecting the state of the power source.


    NG

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

    OK

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


    1. A0094F3E11
      Text in Illustration
      *a

      Front view of wire harness connector

      (to Certification ECU)

      Disconnect the G38 ECU connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      G38-17 (CUTB) - Body ground Always 11 to 14 V
      G38-1 (+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
      G38-15 (E) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. Disconnect the R17 receiver connector.

    2. Disconnect the G39 ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      R17-4 (+5) - G39-5 (RCO) Always Below 1 Ω
      R17-5 (DATA) - G39-15 (RDA) Always Below 1 Ω
      R17-2 (RSSI) - G39-16 (RSSI) Always Below 1 Ω
      G39-5 (RCO) - Body ground Always 10 kΩ or higher
      G39-15 (RDA) - Body ground Always 10 kΩ or higher
      G39-16 (RSSI) - Body ground Always 10 kΩ or higher
      R17-1 (GND) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  9. CHECK DOOR CONTROL RECEIVER (OPERATION)


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


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

      OK
      Wireless and entry functions operate normally.

    NG

    REPLACE CERTIFICATION ECU

    OK

    END (DOOR CONTROL RECEIVER IS DEFECTIVE)