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 back door electrical key oscillator (for outer) and antenna 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. 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

A003BXRE01

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 of the master switch assembly is operated, check that the locked doors unlock 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.

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

      ON: Back door unlock switch pushed

      OFF: Back door unlock switch not pushed

      		 -
      OK
      "ON" (switch is pushed) or "OFF" (switch is not pushed) appears on the screen.

    NG

    CHECK BACK DOOR OPENER SWITCH Click here

    OK

    REPLACE CERTIFICATION ECU

  3. CHECK BACK DOOR OPENER SWITCH


    1. A003BZ9E03

      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

      1 (UL) - 2 (L)

      3 (B) - 2 (L)

      		 No switch 10 kΩ or higher
      1 (UL) - 2 (L) Lock switch pushed Below 1 Ω
      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)

    A003D56E04
    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)

    1. Disconnect the M5 switch connector.

    2. Disconnect the D54 ECU connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      M5-3 (B) - D54-22 (TSW5) Always Below 1 Ω
      M5-3 (B) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE CERTIFICATION ECU