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

DTC Code DTC Name
Front Passenger Side Door Entry Unlock Function does not Operate

DESCRIPTION

If the front passenger side door entry unlock function does not operate but the entry lock function operates, the communication line between the vehicle and electrical key transmitter is normal. The part at fault may be a touch sensor circuit (certification ECU → front passenger side door outside handle).

WIRING DIAGRAM

B216377E15

CAUTION / NOTICE / HINT

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.

  • Check that there are no electrical key transmitters in the vehicle.

  • Before performing the inspection, check that DTC B1242 (wireless door lock control) is not output (Click here).

  • 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.

    GO TO POWER DOOR LOCK CONTROL SYSTEM

    (Click here)

  2. 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

      P-Door Lock Pos SW

      Front passenger side door courtesy light switch signal / ON or OFF

      ON: Front passenger side door opened

      OFF: Front passenger side door closed

      -

      OK

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

    GO TO POWER DOOR LOCK CONTROL SYSTEM (Proceed to Only Passenger Door LOCK / UNLOCK Functions do not Operate)

    (Click here)

  3. READ VALUE USING INTELLIGENT TESTER (TOUCH SENSOR)

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

      Table 2. Entry&Start

      Tester Display

      Measurement Item/Range

      Normal Condition

      Diagnostic Note

      P-Door Touch Sensor

      Front passenger side door unlock sensor / ON or OFF

      ON: Front passenger side door unlock sensor touched

      OFF: Front passenger side door unlock sensor not touched

      -

      OK

      "ON" (unlock sensor is touched) and "OFF" (unlock sensor is not touched) appear on the screen.

    REPLACE CERTIFICATION ECU

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

    1. U122396E02

      Disconnect the H51 ECU connector.

    2. Disconnect the J10*1 or K6*2 handle connector.

      • *1: for LHD

      • *2: for RHD

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

      Standard Resistance

      for LHD

      Tester Connection

      Condition

      Specified Condition

      H51-21 (SEN2) - J10-4 (SENS)

      Always

      Below 1 Ω

      H51-21 (SEN2) - Body ground

      Always

      10 kΩ or higher

      for RHD

      Tester Connection

      Switch Condition

      Specified Condition

      H51-21 (SEN2) - K6-4 (SENS)

      Always

      Below 1 Ω

      H51-21 (SEN2) - Body ground

      Always

      10 kΩ or higher
      Table 3. Text in Illustration

      *1

      for LHD

      *2

      for RHD

      *3

      Front view of wire harness connector

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

      *4

      Front view of wire harness connector

      (to Certification ECU)

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  5. CHECK FRONT DOOR OUTSIDE HANDLE ASSEMBLY (FOR PASSENGER SIDE)

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

      U122443E02

      Standard Voltage

      Tester Connection

      Switch Condition

      Specified Condition

      H51-21 (SEN2) - H51-15 (E)

      Engine switch off, all doors closed and unlock sensor (driver side) off → on

      Pulse generation → Below 2 V
      Table 4. Text in Illustration

      *1

      Component with harness connected

      (Certification ECU)

      -

      -

    REPLACE CERTIFICATION ECU

    REPLACE FRONT DOOR OUTSIDE HANDLE ASSEMBLY (FOR PASSENGER SIDE)

    (Click here)