Back Door Entry Unlock Function Does Not Operate

THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Entry Function): Back Door Entry Unlock Function does not Operate
- Back Door Entry Unlock Function does not Operate

DESCRIPTION

When the back door opener switch is turned on, the certification ECU (smart key ECU assembly) uses the back door electrical key antenna (for outer) to output a request signal to the outside of the vehicle for a distance of approximately 1.0 m (3.28 ft.) from the back door. A key near the back door detects this request and transmits its ID code. The door control receiver receives the ID code and sends this ID code to the certification ECU (smart key ECU assembly). The certification ECU (smart key ECU assembly) checks if the ID code is valid. When the ID code is valid, the certification ECU (smart key ECU assembly) sends a back door open signal to the main body ECU using the CAN communication line and stops outputting request signals. The main body ECU then unlocks the back door.

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 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 Operation Check
OK -- Continue to next step.

2. READ VALUE USING TECHSTREAM (BACK DOOR OPEN HANDLE SW)

(a) Using the Techstream, read the Data List.

Main Body





OK:

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

NG -- CHECK BACK DOOR OPENER SWITCH

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

3. CHECK BACK DOOR OPENER SWITCH

(a) 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 (MAIN BODY ECU - BACK DOOR OPENER SWITCH)





(a) Disconnect the E1 ECU connector.

(b) Disconnect the S7 switch connector.

(c) 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)