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

DESCRIPTION

If the entry lock and unlock functions do not operate for the rear door LH only, the request code may not be being transmitted from the rear door LH or the rear door outside handle assembly (for rear door LH) (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 rear door outside handle assembly (for rear door LH) [rear door LH electrical key antenna]), or there may be wave interference.

CAUTION / NOTICE / HINT

PROCEDURE

1. Click here

   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.

   
   
   • OKClick here
   • NG

     GO TO POWER DOOR LOCK CONTROL SYSTEM (Click here)

2. Click here

   CHECK WAVE ENVIRONMENT

   
   
   1. 

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

      Table 1. Text in Illustration

      *a	Approximately 0.3 m (0.984 ft.)

      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.

      Tip:

      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.

      Table 2. Result

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

   
   
   • AClick here
   • B

     AFFECTED BY WAVE INTERFERENCE

3. Click here

   CHECK HARNESS AND CONNECTOR (REAR DOOR OUTSIDE HANDLE ASSEMBLY - CERTIFICATION ECU AND BODY GROUND)

   
   

   1. Disconnect the O8 rear door outside handle assembly (for rear door LH) connector.

   2. Disconnect the H57 and Q2 certification ECU (smart key ECU assembly) connectors.

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

      Standard Resistance

      Tester Connection Condition Specified Condition O8-3 (ANT2) - Q2-18 (CG3B) Always Below 1 Ω O8-6 (ANT1) - Q2-17 (CLG3) Always Below 1 Ω O8-5 (B) - Q2-23 (POS3) Always Below 1 Ω O8-2 (GND) - Body ground Always Below 1 Ω H57-1 (E) - Body ground Always Below 1 Ω O8-3 (ANT2) or Q2-18 (CG3B) - Body ground Always 10 kΩ or higher O8-6 (ANT1) or Q2-17 (CLG3) - Body ground Always 10 kΩ or higher O8-5 (B) or Q2-23 (POS3) - Body ground Always 10 kΩ or higher

   
   
   • OKClick here
   • NG

     REPAIR OR REPLACE HARNESS OR CONNECTOR

4. Click here

   CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) (OUTPUT TO REAR LH DOOR ELECTRICAL KEY ANTENNA)

   
   
   1. 

      Disconnect the O8 rear door outside handle assembly (for rear door LH) connector.

   2. Connect the Q2 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 O8-5 (B) - O8-2 (GND) Power switch off → on (IG) 9 to 12 V → Below 2 V

   4. Using an oscilloscope, check the waveform.

      OK

      Tester Connection Condition Tool Setting Specified Condition O8-3 (ANT2) - O8-6 (ANT1) 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* All doors locked through wireless operation 2 V/DIV., 500 ms/DIV. Pulse generation (See waveform)

      
      

      • *: For details about the areas that are inside the entry function detection area, refer to Operation Check (Click here).

      Table 3. Text in Illustration

      *1	Waveform
      *a	rear view of wire harness connector (to Rear Door Outside Handle Assembly (for Rear Door LH))

   
   
   • OKClick here
   • NG

     REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

5. Click here

   REPLACE REAR DOOR OUTSIDE HANDLE ASSEMBLY (FOR REAR DOOR LH)

   
   

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

   
   
   • NEXTClick here
6. Click here

   CHECK REAR DOOR OUTSIDE HANDLE ASSEMBLY (FOR REAR DOOR LH) (OPERATION)

   
   

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

      OK
      Entry functions operate normally.

   
   
   • OK

     END (REAR DOOR OUTSIDE HANDLE ASSEMBLY (FOR REAR DOOR LH) WAS DEFECTIVE)

   • NG

     REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)