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

DESCRIPTION

When the entry functions and wireless door lock functions do not operate, a malfunction or electrical interference may be occurring in either of the following: 1) signal communication line between the door control receiver and certification ECU (smart key ECU assembly) (the line that is used for entry and wireless functions); or 2) electrical key transmitter.

WIRING DIAGRAM

A003S9OE13

INSPECTION PROCEDURE

Note


  • The entry and start system (for entry function) uses a multiplex communication system (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.

  • 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.

PROCEDURE


  1. CHECK POWER DOOR LOCK OPERATION


    1. When the door control switch on the 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

  2. CHECK ELECTRICAL KEY TRANSMITTER


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

      OK
      Entry function operates normally.

    NG

    CHECK WAVE ENVIRONMENT Click here

    OK

  3. 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

      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. A003RRV

      Remove the battery from the electrical key transmitter that does not operate. Attach a lead wire (0.6 mm (0.0236 in.) or less in diameter including wire sheath) with tape or equivalent to the negative (-) terminal Click here.

      Note


      • Do not wrap a lead wire around the terminal, wedge it between the terminals, or solder it. Terminal may be deformed or damaged, and the battery will not be able to be installed correctly.

      • When replacing the transmitter battery, before starting work, remove static electricity that has built up in the body by touching, for example, the vehicle to prevent the electrical transmitter from being damaged.

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

    3. A003RKNE07

      Using an oscilloscope, check the transmitter battery voltage waveform.

      Tech Tips

      When measuring the battery voltage, while operating the lock switch of a door outside handle assembly, bring the electrical key transmitter within the entry operating range 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 Power switch off, all doors closed and lock switch pushed
      Specified Condition 2.2 to 3.2 V (Refer to the 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 check that the wireless function operates normally.

      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 indicates that the problem only occurs in certain locations or 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 function operates normally.

    NG

    CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - BATTERY AND BODY GROUND) Click here

    OK

    AFFECTED BY WAVE INTERFERENCE

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


    1. Disconnect the 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
      E117-1 (+B) - Body ground Power switch off 11 to 14 V

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      E117-17 (E) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. Disconnect the door control receiver connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      E117-29 (RCO) - M19-4 (+5) Always Below 1 Ω
      E117-38 (RDA) - M19-5 (DATA) Always Below 1 Ω
      E117-39 (RSSI) - M19-2 (RSSI) Always Below 1 Ω
      E117-29 (RCO) - Body ground Always 10 kΩ or higher
      E117-38 (RDA) - Body ground Always 10 kΩ or higher
      E117-39 (RSSI) - Body ground Always 10 kΩ or higher
      M19-1 (GND) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  8. REPLACE DOOR CONTROL RECEIVER


    1. Replace the door control receiver Click here.


    NEXT

  9. CHECK DOOR CONTROL RECEIVER (OPERATION)


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

      OK
      Wireless and entry functions operate normally.

    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    OK

    END (DOOR CONTROL RECEIVER WAS DEFECTIVE)