SMART ENTRY AND START SYSTEM(for Entry Function) Driver Side Door Entry Lock and Unlock Functions do not Operate

DESCRIPTION

If the entry lock and unlock functions do not operate for the driver door only, the request code may not be being transmitted from the driver door or the front door outside handle assembly (for driver door) (touch sensor) may be malfunctioning. If the entry functions for other doors operate properly, communication between the electrical key transmitter sub-assembly and door control receiver is normal. In this case, there may be a problem with request code transmission (communication between the certification ECU (smart key ECU assembly) and front door outside handle assembly (for driver door) [driver door electrical key antenna]), or there may be wave interference.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

PROCEDURE

1. CHECK POWER DOOR LOCK CONTROL SYSTEM

   
   

   1. When the door control switch on the multiplex network 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 WAVE ENVIRONMENT

   
   
   1. 

      Text in Illustration

      *a	Approximately 0.3 m (0.984 ft.)

      Bring the electrical key transmitter sub-assembly approximately 0.3 m (0.984 ft.) from the front door outside handle assembly (for driver door) and perform an entry function check Click here.

      Note

      If the electrical key transmitter sub-assembly is brought within 0.2 m (0.656 ft.) of the door handle, communication may not be possible.

      Tech Tips

      If the inspection result is that the problem only occurs in certain locations or at certain times of day, the possibility of wave interference is high. Also, added vehicle components may cause wave interference. If installed, remove them and perform the operation check.

      Result
      Result Proceed to Entry function does not operate normally. A Entry function operates normally. B

   
   

   B

   AFFECTED BY WAVE INTERFERENCE

   A

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

   
   

   1. Disconnect the M11*1 or L12*2 front door outside handle assembly (for driver door) connector.

      
      

      • *1: for LHD

      • *2: for RHD

   2. Disconnect the H194 certification ECU (smart key ECU assembly) connector.

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

      Standard Resistance
      for LHD Tester Connection Condition Specified Condition M11-3 (ANT2) - H194-13 (CG1B) Always Below 1 Ω M11-6 (ANT1) - H194-12 (CLG1) Always Below 1 Ω M11-5 (B) - H194-19 (POS1) Always Below 1 Ω M11-2 (GND) - Body ground Always Below 1 Ω M11-3 (ANT2) or H194-13 (CG1B) - Body ground Always 10 kΩ or higher M11-6 (ANT1) or H194-12 (CLG1) - Body ground Always 10 kΩ or higher M11-5 (B) or H194-19 (POS1) - Body ground Always 10 kΩ or higher
      for RHD Tester Connection Condition Specified Condition L12-3 (ANT2) - H194-13 (CG1B) Always Below 1 Ω L12-6 (ANT1) - H194-12 (CLG1) Always Below 1 Ω L12-5 (B) - H194-19 (POS1) Always Below 1 Ω L12-2 (GND) - Body ground Always Below 1 Ω L12-3 (ANT2) or H194-13 (CG1B) - Body ground Always 10 kΩ or higher L12-6 (ANT1) or H194-12 (CLG1) - Body ground Always 10 kΩ or higher L12-5 (B) or H194-19 (POS1) - Body ground Always 10 kΩ or higher

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

4. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) (OUTPUT TO DRIVER DOOR ELECTRICAL KEY ANTENNA)

   
   
   1. 

      Text in Illustration

      *A	for LHD
      *B	for RHD
      *1	Waveform
      *a	Front view of wire harness connector (to Front Door Outside handle assembly (for driver door))

      Disconnect the M11*2 or L12*3 front door outside handle assembly (for driver door) connector.

   2. Connect the H194 certification ECU (smart key ECU assembly) connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition M11-5 (B) - M11-2 (GND)*2 Power switch off → on (IG) 9 to 12 V → Below 2 V L12-5 (B) - L12-2 (GND)*3

   4. Using an oscilloscope, check the waveform.

      OK

      Tester Connection Condition Tool Setting Specified Condition M11-3 (ANT2) - M11-6 (ANT1)*2 Procedure: Power switch off Electrical key transmitter sub-assembly brought outside vehicle All doors closed Electrical key transmitter sub-assembly not inside vehicle Electrical key transmitter sub-assembly brought outside detection area*1 All doors locked through wireless operation 2 V/DIV., 500 ms/DIV. Pulse generation (See waveform) L12-3 (ANT2) - L12-6 (ANT1)*3

      
      

      • *1: For details about the areas that are outside the entry function detection area, refer to Operation check Click here.

      • *2: for LHD

      • *3: for RHD

   
   

   NG

   REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

   OK

5. REPLACE FRONT DOOR OUTSIDE HANDLE ASSEMBLY (FOR DRIVER DOOR)

   
   

   1. Temporarily replace the front door outside handle assembly (for driver door) with a new or known good one Click here.

   
   

   NEXT

6. CHECK FRONT DOOR OUTSIDE HANDLE ASSEMBLY (FOR DRIVER DOOR) (OPERATION)

   
   

   1. Check that the entry functions operate normally Click here.

      OK
      Entry functions operate normally.

   
   

   OK

   END (FRONT DOOR OUTSIDE HANDLE ASSEMBLY (FOR DRIVER DOOR) WAS DEFECTIVE)

   NG

   REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)