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

WIRING DIAGRAM

A0160EZE02

INSPECTION PROCEDURE

Note


  • 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 locked doors unlock Click here.

      OK
      Locked doors unlock.

    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 functions do not operate A
      Entry functions operate and electrical key transmitter does not operate B

    A

    CHECK WAVE ENVIRONMENT Click here

    B

  3. CHECK ELECTRICAL KEY TRANSMITTER (LED)


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

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

      Tech Tips

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


    A

    REPLACE ELECTRICAL KEY TRANSMITTER

    B

    REPLACE TRANSMITTER BATTERY Click here

    C

  4. INSPECT TRANSMITTER BATTERY (VOLTAGE)


    1. A01628U

      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 the lead wire around a terminal, wedge it between the terminals, or solder it. A 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. A0162WKE04

      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 perform a wireless and entry 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 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

    INSPECT FUSE (SECURITY) Click here

    OK

    AFFECTED BY WAVE INTERFERENCE

  6. INSPECT FUSE (SECURITY)


    1. Remove the SECURITY fuse from the main body ECU LH (cowl side junction block LH).

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      SECURITY fuse Always Below 1 Ω

    NG

    REPLACE FUSE (SECURITY)

    OK

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


    1. A0163EKE02

      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
      P33-1 (+B1) - 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
      P33-17 (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)


    1. A015Z4RE01

      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
      P31-6 (GND) - Body ground Always Below 1 Ω
      P33-29 (RCO) - P31-2 (+5) Always Below 1 Ω
      P33-38 (RDA) - P31-3 (DATA) Always Below 1 Ω
      P33-39 (RSSI) - P31-5 (RSSI) Always Below 1 Ω
      P33-29 (RCO) - Body ground Always 10 kΩ or higher
      P33-38 (RDA) - Body ground Always 10 kΩ or higher
      P33-39 (RSSI) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  9. REPLACE DOOR CONTROL RECEIVER


    1. Replace the door control receiver Click here.


    NEXT

  10. CHECK DOOR CONTROL RECEIVER (OPERATION)


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

      OK
      Wireless and entry functions operate normally.

    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    OK

    END (DOOR CONTROL RECEIVER IS DEFECTIVE)