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

DESCRIPTION

If the door lock function does not operate via smart operation from only the passenger door, but the unlock function operates normally, a normal request code is sent from the passenger door. The trouble area may be an open in the door lock position switch (LSWP) circuit.

WIRING DIAGRAM

A003G62E01

INSPECTION PROCEDURE

Note


  • Check the entry lock operation at least 0.3 m (0.984 ft.) from the vehicle, as the entry lock function may not operate near the vehicle due to wave interference from the interior oscillator.

  • The smart entry and start system (for Entry Function) uses a multiplex communication system (LIN communication system) and the 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 systems are functioning properly.

  • When using the GTS with the vehicle engine switch off, connect the GTS to the vehicle and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the GTS and the vehicle begins. Then select the Model Code "KEY REGIST" under manual mode and enter the following menus: Body Electrical / Entry&Start(CAN).

    While using the GTS, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the GTS and the vehicle.

  • Check that there are no electrical key transmitter sub-assemblies in the vehicle.

  • Before performing the inspection, check that DTC B1242 (wireless door lock control) or B27B0 is not output.

  • Before replacing the certification ECU (smart key ECU assembly), refer to the smart entry and start system (for Entry Function) precaution Click here.

  • After repair, confirm that no DTCs are output by performing the "DTC Output Confirmation Operation".

PROCEDURE


  1. CHECK POWER DOOR LOCK CONTROL SYSTEM


    1. When the door control switch on the power window regulator 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. CHECK HARNESS AND CONNECTOR (LOCK POSITION SWITCH CIRCUIT)


    1. Disconnect the B75 certification ECU (smart key ECU assembly) connector.

    2. Disconnect the H7 front door lock assembly (lock position switch) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      B75-9 (LSWP) - L1-8 (LSSR) Always Below 1 Ω
      B75-9 (LSWP) or L1-8 (LSSR) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)


    1. Replace the certification ECU (smart key ECU assembly) with a new one.

      Tech Tips

      Refer to Service Bulletin.


    NEXT

  4. CHECK ENTRY DOOR LOCK OPERATION


    1. Check the operation of the entry lock/unlock function.

      OK
      Entry lock/unlock operate normally.

    NG

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY (BODY COMPUTER)

    OK

    CHECK END (CERTIFICATION ECU [SMART KEY ECU ASSEMBLY] WAS DEFECTIVE)