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

DESCRIPTION

If the back door entry lock function does not operate but the back door open function operates, the communication line between the vehicle and electrical key transmitter is normal. The part at fault may be the entry lock switch circuit (certification ECU (smart key ECU assembly) → back door opener switch).

WIRING DIAGRAM

CAUTION / NOTICE / HINT

PROCEDURE

1. CHECK POWER DOOR LOCK OPERATION

   
   

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

      OK
      Door locks operate normally.

   
   

   NG

   GO TO POWER DOOR LOCK CONTROL SYSTEM Click here

   OK

2. CHECK VEHICLE EQUIPMENT

   
   

   1. Check if the power back door is equipped on the vehicle.

      Result

      Result	Proceed to
      w/ Power Back Door System	A
      w/o Power Back Door System	B

   
   

   B

   READ VALUE USING INTELLIGENT TESTER (DOOR LOCK POSITION SWITCH) Click here

   A

3. CHECK POWER BACK DOOR OPERATION

   
   

   1. When the power back door switch is operated, check that the power back door closes.

      OK
      Power back door system is normal.

      Result

      Result	Proceed to
      Power back door system is abnormal	A
      Power back door system is normal	B

   
   

   A

   GO TO POWER BACK DOOR SYSTEM Click here

   B

   READ VALUE USING INTELLIGENT TESTER (BACK DOOR LOCK SWITCH) Click here

4. 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.

      Main Body

      Tester Display	Measurement Item / Range	Normal Condition	Diagnostic Note
      Back Lock Pos switch	Back door lock position switch signal / ON or OFF	ON: Back door is unlocked OFF: Back door is locked	-

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

   
   

   NG

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

   OK

5. READ VALUE USING INTELLIGENT TESTER (BACK DOOR LOCK SWITCH)

   
   

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

      Entry&Start

      Tester Display	Measurement Item/Display	Normal Condition	Diagnostic Note
      Tr/B-Door Lock SW	Back door lock switch / ON or OFF	ON: Back door lock switch is pushed OFF: Back door lock switch is not pushed	-

      OK
      "ON" (switch is pushed) and "OFF" (switch is not pushed) appears on the screen.

   
   

   OK

   REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

   NG

6. CHECK BACK DOOR OPENER SWITCH

   
   

   1. 

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

      Standard Resistance
      Tester Connection Switch Condition Specified Condition 1 (UL) - 2 (L) Lock switch pushed Below 1 Ω 1 (UL) - 2 (L) Lock switch not pushed 10 kΩ or higher

   
   

   NG

   REPLACE BACK DOOR OPENER SWITCH Click here

   OK

7. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU [SMART KEY ECU ASSEMBLY] - BACK DOOR OPENER SWITCH)

   
   

   1. Disconnect the E29 ECU connector.

      

      *1	Front view of wire harness connector: (to Certification ECU [Smart Key ECU Assembly])
      *2	Front view of wire harness connector: (to Back Door Opener Switch)

   2. Disconnect the S7 switch connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition E29-7 (TSW5) - S7-1 (UL) Always Below 1 Ω E29-7 (TSW5) - Body ground Always 10 kΩ or higher

   
   

   OK

   REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR