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

DESCRIPTION

When the back door entry lock and unlock functions do not operate, one of the following may be malfunctioning: 1) power door lock control system; 2) outside electrical key oscillator (for rear side); 3) certification ECU (smart key ECU assembly); or 4) back door opener switch assembly.

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1. CHECK POWER DOOR LOCK OPERATION

   
   

   1. When the door control switch on the master switch assembly is operated, check that the doors unlock and lock according to switch operation Click here.

      OK
      Door locks operate normally.

   
   

   NG

   GO TO POWER DOOR LOCK CONTROL SYSTEM (Proceed to Problem Symptoms Table) Click here

   OK

2. READ VALUE USING INTELLIGENT TESTER

   
   

   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 or Entry & Start / Data List.

   5. Read the Data List according to the display on the intelligent tester.

      Main Body (Main Body ECU)

      Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
      Back Door Open Handle	Back door opener switch assembly (opener switch) / ON or OFF	ON: Back door opener switch assembly (opener switch) pushed OFF: Back door opener switch assembly (opener switch) not pushed	-

      Entry & Start (Certification ECU (Smart Key ECU Assembly))

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

      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

      *1	Approximately 0.3 m (0.984 ft.)
      *2	Vehicle Center

      Bring the electrical key transmitter near the outside electrical key oscillator (for rear side), and perform an entry back door open and entry lock functions check.

      Note

      If the key is brought within 0.2 m (0.656 ft.) of the rear bumper, communication is not possible.

      Tech Tips

      
      

      • When the electrical key transmitter is brought near the electrical key antenna, the possibility of wave interference decreases, and it can be determined if wave interference is causing the problem symptom.

      • If the operation is normal, the possibility of wave interference is high. Also, added vehicle components may cause wave interference. If installed, remove them and perform the operation.

      OK
      Entry functions operate normally.

   
   

   NG

   PERFORM KEY DIAGNOSTIC MODE INSPECTION Click here

   OK

   AFFECTED BY WAVE INTERFERENCE

4. PERFORM KEY DIAGNOSTIC MODE INSPECTION

   
   
   1. 

      Text in Illustration

      *1	0.7 to 1.0 m (2.30 to 3.28 ft.)
      *2	Vehicle Center

      Diagnostic mode inspection (outside electrical key oscillator (for rear side))

      
      

      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 / Entry & Start / Key Communication Check / Overhead + Back Door.

      5. When the electrical key transmitter is held at the same height as the rear bumper upper surface and aligned with the center of the rear of the vehicle, check that the wireless door lock buzzer sounds.

         Tech Tips

         If the buzzer sounds, it can be determined that the outside electrical key oscillator (for rear side) is operating normally.

         OK
         Wireless door lock buzzer sounds.

   
   

   NG

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

   OK

   REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

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

   
   

   1. Disconnect the certification ECU (smart key ECU assembly) connector.

   2. Disconnect the outside electrical key oscillator (for rear side) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition G20-31 (CLG8) - N1-1 (CLG5) Always Below 1 Ω G20-32 (CG8B) - N1-2 (CLGB) Always Below 1 Ω G20-31 (CLG8) - Body ground Always 10 kΩ or higher G20-32 (CG8B) - Body ground Always 10 kΩ or higher

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

6. REPLACE OUTSIDE ELECTRICAL KEY OSCILLATOR (for Rear Side)

   
   

   1. Replace the outside electrical key oscillator (for rear side) Click here.

   
   

   NEXT

7. CHECK OUTSIDE ELECTRICAL KEY OSCILLATOR (OPERATION)

   
   

   1. Check that the entry functions operate normally.

      OK
      Entry functions operate normally.

   
   

   NG

   REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

   OK

   END (OUTSIDE ELECTRICAL KEY OSCILLATOR WAS DEFECTIVE)

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

   
   

   1. 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 U7-2 (E) - Body ground Always Below 1 Ω

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

   REPLACE BACK DOOR OPENER SWITCH ASSEMBLY Click here