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

DESCRIPTION

If the entry lock and unlock functions do not operate for the back door only, the request code may not be being transmitted from the back door. If the entry functions for other doors operate properly, communication between the key 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 electrical key antenna [outside luggage]), or there may be electric wave interference.

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1. CHECK POWER DOOR LOCK OPERATION

   
   

   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. READ VALUE USING INTELLIGENT TESTER (BACK DOOR OPENER SWITCH)

   
   

   1. Connect the intelligent tester to the DLC3.

   2. Turn the power 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.

      Entry & Start

      Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
      Tr/B-Door Lock SW	Back door opener switch (lock switch) / ON or OFF	ON: Back door opener switch (lock switch) pushed OFF: Back door opener switch assembly (lock switch) not pushed	Displays whether the back door opener switch (lock switch) is on or off. Use this Data List item to help determine if there is a switch malfunction when the back door lock function does not operate.
      Tr/B-Door Unlock SW	Back door opener switch (opener switch) / ON or OFF	ON: Back door opener switch (opener switch) pushed OFF: Back door opener switch assembly (opener switch) not pushed	Displays whether the back door opener switch (unlock switch) is on or off. Use this Data List item to help determine if there is a switch malfunction when the back door unlock function does not operate.

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

   
   

   NG

   CHECK HARNESS AND CONNECTOR (BACK DOOR OPENER SWITCH - BODY GROUND) Click here

   OK

3. CHECK WAVE ENVIRONMENT

   
   
   1. 

      Text in Illustration

      *a	Approximately 0.3 m (0.98 ft.)

      Bring the electrical key transmitter approximately 0.3 m (0.98 ft.) from the electrical key antenna (outside luggage) and perform an entry back door unlock function check Click here.

      Note

      If the key is brought within 0.2 m (0.66 ft.) of the rear bumper, communication may not 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 electric wave interference is high. Also, added vehicle components may cause electric wave interference. If installed, remove them and perform the operation check.

      OK
      Entry function operates normally.

   
   

   NG

   CHECK ELECTRICAL KEY ANTENNA IN KEY DIAGNOSTIC MODE Click here

   OK

   AFFECTED BY WAVE INTERFERENCE

4. CHECK ELECTRICAL KEY ANTENNA IN KEY DIAGNOSTIC MODE

   
   

   1. Check the following antenna in the key diagnostic mode Click here.

      
      
      1. 

         Text in Illustration

         *a	0.7 to 1 m (2.30 to 3.28 ft.)

         Check the electrical key antenna (outside luggage).

         When the electrical key transmitter is brought within 0.7 to 1 m (2.30 to 3.28 ft.) of the electrical key antenna (outside luggage), check that the wireless door lock buzzer sounds.

         OK
         Wireless door lock buzzer sounds.

   
   

   NG

   CHECK HARNESS AND CONNECTOR (ELECTRICAL KEY ANTENNA - CERTIFICATION ECU) Click here

   OK

   REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

5. CHECK HARNESS AND CONNECTOR (ELECTRICAL KEY ANTENNA - CERTIFICATION ECU)

   
   

   1. Disconnect the Q11 electrical key antenna (outside luggage) connector.

   2. Disconnect the H2 certification ECU (smart key ECU assembly) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition Q11-1 (CLG5) - H2-19 (CLG8) Always Below 1 Ω Q11-2 (CLGB) - H2-20 (CG8B) Always Below 1 Ω Q11-1 (CLG5) or H2-19 (CLG8) - Body ground Always 10 kΩ or higher Q11-2 (CLGB) or H2-20 (CG8B) - Body ground Always 10 kΩ or higher

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

6. INSPECT ELECTRICAL KEY ANTENNA (OUTSIDE LUGGAGE)

   
   
   1. 

      Text in Illustration

      *a	Component without harness connected (Electrical Key Antenna (Outside Luggage))

      Remove the electrical key antenna (outside luggage) Click here.

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

      Standard Resistance
      Tester Connection Condition Specified Condition 1 (CLG5) - 2 (CLGB) Always Below 1 Ω

   
   

   NG

   REPLACE ELECTRICAL KEY ANTENNA (OUTSIDE LUGGAGE) Click here

   OK

   REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

7. CHECK HARNESS AND CONNECTOR (BACK DOOR OPENER SWITCH - BODY GROUND)

   
   
   1. 

      Text in Illustration

      *a	Front view of wire harness connector (to Back Door Opener Switch Assembly)

      Disconnect the back door opener switch assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition V4-2 (E) - Body ground Always Below 1 Ω

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

   REPLACE BACK DOOR OPENER SWITCH ASSEMBLY