Back Door Entry Lock Function Does Not Operate

DOOR LOCK: SMART KEY SYSTEM: Back Door Entry Lock Function does not Operate
- 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. As a faulty part, the entry lock switch circuit (certification ECU (smart key ECU assembly) -> back door opener switch (entry lock switch)) can be considered.

WIRING DIAGRAM





INSPECTION PROCEDURE

NOTICE:
Before performing the inspection, check that there are no problems related to "CAN COMMUNICATION SYSTEM" and "LIN COMMUNICATION SYSTEM".

PROCEDURE

1. CHECK POWER DOOR LOCK OPERATION

(a) When the door control switch on the master switch assembly is operated, check that the locked doors unlock Operation Check.

OK:

Locked doors unlock.

NG -- GO TO POWER DOOR LOCK CONTROL SYSTEM Problem Symptoms Table
OK -- Continue to next step.

2. READ VALUE ON TECHSTREAM (BACK DOOR OPENER SWITCH)

(a) Connect Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(c) Turn the tester on.

(d) Enter the following menus:

Body Electrical / Smart Key / Data List.

(e) Select Tr/B-Door Lock SW in the Data List and read the tester display.

Smart Key (Certification ECU (Smart Key ECU Assembly)):





OK:

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

NG -- CHECK BACK DOOR OPENER SWITCH

OK -- REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) Removal

3. CHECK BACK DOOR OPENER SWITCH

(a) Remove the back door opener switch Removal.





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

Standard resistance:





NG -- REPLACE BACK DOOR OPENER SWITCH Removal
OK -- Continue to next step.

4. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU - BACK DOOR OPENER SWITCH)

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





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

Standard resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

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

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





Standard resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) Removal