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

DESCRIPTION

When the back door opener switch is turned on, the certification ECU uses the outside electrical key oscillator (outside luggage) and antenna to output a request signal to the outside of the vehicle over 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. The certification ECU checks if the ID code is valid. When the ID code is valid, the certification ECU 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

A01ISLWE03

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.

  • When checking the entry lock operation multiple times, the lock operation may be limited to 2 consecutive operations according to the settings. In order to perform the entry lock operation 3 or more times, an unlock operation must be performed once (any type of unlock operation is sufficient). However, only consecutive entry lock operations are limited. Using the wireless lock or other types of lock operations, it is possible to perform consecutive lock operations without this limitation.

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 the switch operation Click here.

      OK
      Door locks operate normally.

    NG

    GO TO POWER DOOR LOCK CONTROL SYSTEM Click here

    OK

  2. READ VALUE USING INTELLIGENT TESTER (BACK DOOR HANDLE SWITCH)


    1. Using the intelligent tester, read the Data List Click here.

      Entry&Start
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Tr/B Door Unlock SW Back door open switch / ON or OFF

      ON: Back door open switch pushed

      OFF: Back door open switch not pushed

      		 -
      OK
      "ON" (open switch is pushed) and "OFF" (open switch is not pushed) appear on the screen.

    NG

    INSPECT BACK DOOR OPENER SWITCH Click here

    OK

    REPLACE CERTIFICATION ECU

  3. INSPECT BACK DOOR OPENER SWITCH


    1. A01IT41E08

      Remove the back door opener switch Click here.

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition
      3 (B) - 2 (L) No switch pushed 10 kΩ or higher
      3 (B) - 2 (L) Open switch pushed Below 1 Ω

    NG

    REPLACE BACK DOOR OPENER SWITCH Click here

    OK

  4. CHECK HARNESS AND CONNECTOR (BACK DOOR OPENER SWITCH - CERTIFICATION ECU)


    1. A01IOWXE17
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Back Door Opener Switch)
      *2

      Front view of wire harness connector

      (to Certification ECU)

      Disconnect the S7 switch connector.

    2. Disconnect the H51 ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      S7-3 (B) - H51-22 (TSW5) Always Below 1 Ω
      S7-3 (B) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE CERTIFICATION ECU