ENTRY AND START SYSTEM(for Entry Function) Rear Door LH Entry Lock Function does not Operate

DESCRIPTION

If the rear door LH entry lock function does not operate but the entry unlock function operates, the communication line between the vehicle and electrical key transmitter is normal. The part at fault may be an entry lock switch circuit (certification ECU (smart key ECU assembly) → rear door outside handle LH (entry lock switch) → rear door electrical key oscillator LH).

PROCEDURE

1. Click here

   CHECK POWER DOOR LOCK OPERATION

   
   

   1. When the master switch assembly door control switch is operated, check that the locked doors unlock.

      OK
      Door locks operate normally.

   
   
   • OKClick here
   • NG

     GO TO POWER DOOR LOCK CONTROL SYSTEM (Click here)

2. Click here

   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.

      
      

      1. for LHD

         Table 1. Main Body

         Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
         DR Door Lock Position SW	Driver side rear door lock position switch signal / ON or OFF	ON: Driver side rear door unlocked OFF: Driver side rear door locked	-

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

      2. for RHD

         Table 2. Main Body

         Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
         PR Door Lock Position SW	Passenger side rear door lock position switch signal / ON or OFF	ON: Passenger side rear door unlocked OFF: Passenger side rear door locked	-

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

   
   
   • OKClick here
   • NG

     GO TO POWER DOOR LOCK CONTROL SYSTEM (Proceed to Only Rear Door LH LOCK/UNLOCK Functions do not Operate) (Click here)

3. Click here

   READ VALUE USING INTELLIGENT TESTER (LOCK SWITCH)

   
   

   1. Using the intelligent tester, read the Data List.

      
      

      1. for LHD

         Table 3. Entry & Start

         Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
         Dr-Door Trigger Switch	Driver side rear door outside handle lock switch / ON or OFF	ON: Entry lock switch pushed OFF: Entry lock switch not pushed	-

         OK
         On tester screen, item changes between ON and OFF according to above chart.

      2. for RHD

         Table 4. Entry & Start

         Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
         Pr-Door Trigger Switch	Passenger side rear door outside handle lock switch / ON or OFF	ON: Entry lock switch pushed OFF: Entry lock switch not pushed	-

         OK
         On tester screen, item changes between ON and OFF according to above chart.

   
   
   • OK

     REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

   • NGClick here
4. Click here

   CHECK HARNESS AND CONNECTOR (REAR DOOR OUTSIDE HANDLE - DOOR ELECTRICAL KEY OSCILLATOR)

   
   
   1. 

      Table 5.

      *1	Front view of wire harness connector: (to Rear Door Outside Handle)
      *2	Front view of wire harness connector: (to Door Electrical Key Oscillator)

      Disconnect the z28 oscillator connector.

   2. Disconnect the z27 handle connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition z28-9 (TRG-) - z27-1 (TRG-) Always Below 1 Ω z28-9 (TRG-) - Body ground Always 10 kΩ or higher

   
   
   • OKClick here
   • NG

     REPAIR OR REPLACE HARNESS OR CONNECTOR

5. Click here

   CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU [SMART KEY ECU ASSEMBLY] - REAR DOOR OUTSIDE HANDLE)

   
   
   1. 

      Disconnect the E30 ECU connector.

   2. Disconnect the z27 handle connector.

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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition E30-25 (TSW3) - z27-3 (TRG+) Always Below 1 Ω E30-25 (TSW3) - Body ground Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition E30-26 (TSW4) - z27-3 (TRG+) Always Below 1 Ω E30-26 (TSW4) - Body ground Always 10 kΩ or higher

   
   
   • OKClick here
   • NG

     REPAIR OR REPLACE HARNESS OR CONNECTOR

6. Click here

   INSPECT REAR DOOR OUTSIDE HANDLE LH

   
   
   1. 

      Table 6.

      *1	Component without harness connected: (Rear Door Outside Handle)

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition z27-1 (TRG-) - z27-3 (TRG+) Lock switch not pushed 10 kΩ or higher Lock switch pushed Below 1 Ω

   
   
   • OKClick here
   • NG

     REPLACE REAR DOOR OUTSIDE HANDLE (Click here)

7. Click here

   REPLACE DOOR ELECTRICAL KEY OSCILLATOR

   
   

   1. Replace the door electrical key oscillator (Click here).

   
   
   • NEXTClick here
8. Click here

   CHECK DOOR ELECTRICAL KEY OSCILLATOR (OPERATION)

   
   

   1. Check that the entry function operates normally.

      OK
      Operates normally.

   
   
   • OK

     END (DOOR ELECTRICAL OSCILLATOR IS DEFECTIVE)

   • NG

     REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)