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 (the line that is used for entry and wireless functions); or 2) electrical key transmitter.

WIRING DIAGRAM

A011BVQE01

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.

  • 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 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.

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 operates normally Click here.

      OK
      Entry function operates normally.

    NG

    CHECK WAVE ENVIRONMENT Click here

    OK

  3. CHECK ELECTRICAL KEY TRANSMITTER (LED)


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

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

      Tech Tips

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


    B

    REPLACE ELECTRICAL KEY TRANSMITTER

    C

    REPLACE TRANSMITTER BATTERY Click here

    A

  4. INSPECT TRANSMITTER BATTERY (VOLTAGE)


    1. A01172G

      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.

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

    3. A0118W9E01

      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 Engine 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 the wireless function.

      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 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

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

    OK

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

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


    1. A0118INE03
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Certification ECU)

      Disconnect the certification ECU connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      D34-17 (CUTB) - Body ground Always 11 to 14 V
      D34-1 (+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
      D34-15 (E) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. A0118B5E01
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Certification ECU)
      *2

      Front view of wire harness connector

      (to Door Control Receiver ECU)

      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
      D35-5 (RCO) - G32-4 (+5) Always Below 1 Ω
      D35-15 (RDA) - G32-5 (DATA) Always Below 1 Ω
      D35-16 (RSSI) - G32-2 (RSSI) Always Below 1 Ω
      D35-5 (RCO) - Body ground Always 10 kΩ or higher
      D35-15 (RDA) - Body ground Always 10 kΩ or higher
      D35-16 (RSSI) - Body ground Always 10 kΩ or higher
      G32-1 (GND) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  9. REPLACE DOOR CONTROL RECEIVER


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


    NEXT

  10. 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

    OK

    END (DOOR CONTROL RECEIVER IS DEFECTIVE)