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WIRELESS DOOR LOCK CONTROL SYSTEM (w/ Entry and Start System) No Answer-Back

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DTC Code DTC Name
  No Answer-Back
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DESCRIPTION

In some cases, wireless door lock control functions are normal but the turn signal lights and wireless door lock buzzer are not. Malfunctions may be present in the main body ECU, certification ECU (smart key ECU assembly), turn signal lights, and/or wireless door lock buzzer signal outputs.*

Note:

  • Before performing the inspection, check that there are no problems related to the CAN communication system and LIN communication system.

  • When troubleshooting a function, first make sure that the answer-back function is set to the default setting.

  • Check that DTC B1242 is not output.

  • When troubleshooting a function, first make sure that the open door warning function is set to the default setting.

Tip:

*: For Europe and China, there is no buzzer sound answer-back function.

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WIRING DIAGRAM

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INSPECTION PROCEDURE

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PROCEDURE


  1. Click here

    READ VALUE USING INTELLIGENT TESTER (DOOR LOCK POSITION SWITCH)


    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.

      Table 1. Main Body
      Tester Display Measurement Item / Range Normal Condition Diagnostic Note
      D Lock Pos switch Driver side door lock position switch signal / ON or OFF

      ON: Driver side door lock is unlocked

      OFF: Driver side door lock is locked

      		 -
      P Lock Pos switch Passenger side door lock position switch signal / ON or OFF

      ON: Passenger side door is unlocked

      OFF: Passenger side door is locked

      		 -
      RL Lock Pos switch Rear door LH lock position switch signal / ON or OFF

      ON: Rear side door LH is unlocked

      OFF: Rear side door LH is locked

      		 -
      RR Lock Pos switch Rear door RH lock position switch signal / ON or OFF

      ON: Rear side door RH is unlocked

      OFF: Rear side door RH is locked

      		 -
      Back Lock Pos switch Back door lock position switch signal / ON or OFF

      ON: Back door is unlocked

      OFF: Back door is locked

      		 -
      OK
      On the intelligent tester screen, the display changes between LOCK and UNLOCK as shown in the chart above.
      Tip:

      • Go to POWER DOOR LOCK CONTROL SYSTEM (Proceed to Only Driver Door LOCK/UNLOCK Functions do not Operate) (Click here).

      • Go to POWER DOOR LOCK CONTROL SYSTEM (Proceed to Only Passenger Door LOCK/UNLOCK Functions do not Operate) (Click here).

      • Go to POWER DOOR LOCK CONTROL SYSTEM (Proceed to Only Rear Door LH LOCK/UNLOCK Functions do not Operate) (Click here).

      • Go to POWER DOOR LOCK CONTROL SYSTEM (Proceed to Only Rear Door RH LOCK/UNLOCK Functions do not Operate) (Click here).

      • Go to POWER DOOR LOCK CONTROL SYSTEM (Proceed to Only Back Door LOCK/UNLOCK Functions do not Operate) (Click here).


  2. Click here

    CHECK WIRELESS DOOR LOCK FUNCTION


    1. Check that the wireless door lock control functions operate with a transmitter (Click here).

      Table 2. Result
      Result Proceed to
      Wireless door lock control functions operate normally but turn signal light answer-back does not occur A
      Wireless door lock control functions operate normally but wireless door lock buzzer answer-back does not occur B

  3. Click here

    CHECK HAZARD WARNING LIGHT


    1. Check that the turn signal lights flash continuously when the hazard warning signal switch is pressed (Click here).

      OK
      Hazard warning lights flash continuously.

  4. Click here

    CHECK HARNESS AND CONNECTOR (WIRELESS DOOR LOCK BUZZER - CERTIFICATION ECU AND BODY GROUND)


    1. Disconnect the E29 ECU connector.

    2. Disconnect the A20 buzzer connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A20-1 - E29-21 (BZR) Always Below 1 Ω
      A20-2 - Body ground
      A20-1 - Body ground Always 10 kΩ or higher

  5. Click here

    CHECK WIRELESS DOOR LOCK BUZZER (OPERATION)


    1. Temporarily replace the wireless door lock buzzer with a new one (Click here).

    2. Check that the wireless door lock buzzer sounds by using the transmitter lock/unlock switch.

      OK
      Wireless door lock buzzer sounds.

  6. Click here

    Go to PROBLEM SYMPTOMS TABLE (LIGHTING SYSTEM)Click here

  7. Click here

    REPLACE MAIN BODY ECU (COWL SIDE JUNCTION BLOCK LH)

  8. Click here

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  9. Click here

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

  10. Click here

    END (WIRELESS DOOR LOCK BUZZER IS DEFECTIVE)

  11. Click here

    Go to POWER DOOR LOCK CONTROL SYSTEM