SMART ENTRY AND START SYSTEM (for Entry Function) Back Door Entry Unlock Function does not Operate

DESCRIPTION

When the back door opener switch assembly (opener switch) is turned on, the certification ECU (smart key ECU assembly) uses the outside electrical key oscillator (for rear side) to output a request signal to the outside of the vehicle for a distance of approximately 1.0 m (3.28 ft.) from the back door. A key near the back door detects this request and transmits its ID code. The door control receiver receives the ID code and sends this ID code to the certification ECU (smart key ECU assembly). The certification ECU (smart key ECU assembly) checks if the ID code is valid. When the ID code is valid, the certification ECU (smart key ECU assembly) sends a back door open signal to the main body ECU using the CAN communication line and stops outputting request signals. The main body ECU then unlocks the back door.

WIRING DIAGRAM

A01CCFSE06

INSPECTION PROCEDURE

Note

The smart 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 smart entry and start system (for entry function) after confirming that the communication system is functioning properly.

PROCEDURE


  1. READ VALUE USING INTELLIGENT TESTER (ENTRY BACK DOOR OPEN FUNCTION)


    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 / Entry & Start / Data List.

    5. Read the Data List according to the display on the intelligent tester.

      Entry & Start (Certification ECU (Smart Key ECU Assembly))
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      B-Dr Opening Operation Back door opening Operation / LONG, TWICE, OFF Customization status displayed -
      Result
      Result Proceed to
      Customize setting is LONG or TWICE A
      Customize setting is OFF B

    B

    PERFORM CUSTOMIZE SETTING (Proceed to Customize Parameters) Click here

    A

  2. CHECK POWER DOOR LOCK CONTROL SYSTEM


    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

  3. READ VALUE USING INTELLIGENT TESTER (BACK DOOR OPENER 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.

      Main Body (Main Body ECU)
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Back Door Open Handle Back door opener switch assembly (opener switch) / ON or OFF

      ON: Back door opener switch assembly (opener switch) pushed

      OFF: Back door opener switch assembly (opener switch) not pushed

      		 -
      OK
      On the intelligent tester screen, the display changes between ON and OFF as shown in the chart above.

    NG

    INSPECT BACK DOOR OPENER SWITCH ASSEMBLY Click here

    OK

    REPLACE MAIN BODY ECU Click here

  4. INSPECT BACK DOOR OPENER SWITCH ASSEMBLY


    1. A01CBB1E04
      Text in Illustration
      *a

      Component without harness connected

      (Back Door Opener Switch Assembly)

      Remove the back door opener switch assembly Click here.

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

      Standard Resistance
      Tester Connection Switch Position Specified Condition
      2 (E) - 3 (UL) Back door opener switch assembly (opener switch) not pushed (OFF) 10 kΩ or higher
      2 (E) - 3 (UL) Back door opener switch assembly (opener switch) pushed (ON) Below 1 Ω

    NG

    REPLACE BACK DOOR OPENER SWITCH ASSEMBLY Click here

    OK

  5. CHECK HARNESS AND CONNECTOR (BACK DOOR OPENER SWITCH - MAIN BODY ECU)


    1. Disconnect the main body ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      U7-3 (UL) - G48-26 (BDSU) Always Below 1 Ω
      U7-3 (UL) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. REPLACE MAIN BODY ECU


    1. Replace the main body ECU Click here.


    NEXT

  7. CHECK SMART ENTRY AND START SYSTEM (OPERATION)


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

      OK
      Entry functions operate normally.

    NG

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    OK

    END