SMART ENTRY AND START SYSTEM (for Entry Function) Front Passenger Side Door Entry Unlock Function does not Operate

DESCRIPTION

If the front passenger door entry lock function operates normally, but its entry unlock function does not, this means that the request code from the front passenger door is being output normally. In this case, a malfunction in the touch sensor circuit (from the certification ECU (smart key ECU assembly) to the front door outside handle assembly (touch sensor)) is suspected.

WIRING DIAGRAM

A01EJ50E62

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.

  • Confirm that another key is not in the cabin.

  • Before replacing the certification ECU (smart key ECU assembly), refer to Service Bulletin.

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 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

  2. READ VALUE USING GTS (DOOR LOCK POSITION SWITCH)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / Main Body / Data List.

    5. Read the Data List according to the display on the GTS.

      Main Body (Main Body ECU (Driver Side junction Block Assembly))
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      P-Door Lock Pos SW Front passenger side door lock position switch signal/ON or OFF

      ON: Front passenger side door is unlocked

      OFF: Front passenger side door is locked

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

    NG

    GO TO LIGHTING SYSTEM (Proceed to Door Unlock Detection Switch Circuit) Click here

    OK

  3. READ VALUE USING GTS (DOOR OUTSIDE HANDLE)


    1. Enter the following menus: Body Electrical / Entry&Start / Data List.

    2. Read the Data List according to the display on the GTS.

      Entry&Start (Certification ECU (Smart Key ECU Assembly))
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      P-Door Touch Sensor Status of touch sensor (for front passenger side) / ON or OFF

      ON: Touch sensor touched

      OFF: Touch sensor not touched

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

    NG

    CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - FRONT DOOR OUTSIDE HANDLE) Click here

    OK

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

  4. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - FRONT DOOR OUTSIDE HANDLE)


    1. Disconnect the certification ECU (smart key ECU assembly) connector.

    2. A01ELGWE43
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Certification ECU (Smart Key ECU Assembly))
      *2

      Front view of wire harness connector

      (to Front Door Outside Handle Assembly (for Front Passenger Side))

      Disconnect the front door outside handle assembly (for front passenger side) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      D25-21 (SEN2) - z4-4 (SENS) Always Below 1 Ω
      D25-21 (SEN2) - Body ground Always 10 kΩ or higher
      z4-4 (SENS) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. INSPECT CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) (TOUCH SENSOR SIGNAL INPUT)


    1. Reconnect the certification ECU (smart key ECU assembly) connector.

    2. Reconnect the front door outside handle assembly (for front passenger side) connector.

      A01EMA4E04

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      D25-21 (SEN2) - D25-15 (E)

      • Engine switch off

      • All door closed

      • Key not in detection area

      • Touch sensor (for front passenger side) not touched

      		 Pulse generation
      D25-21 (SEN2) - D25-15 (E)

      • Engine switch off

      • All door closed

      • Key not in detection area

      • Touch sensor (for front passenger side) touched

      		 Below 2 V
      Text in Illustration
      *1

      Component with harness connected

      (Certification ECU (Smart Key ECU Assembly))

    NG

    REPLACE FRONT DOOR OUTSIDE HANDLE ASSEMBLY (for Front Passenger Side) Click here

    OK

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)