Back Door Entry Lock And Unlock Functions Do Not Operate

THEFT DETERRENT / KEYLESS ENTRY: SMART ACCESS SYSTEM WITH PUSH-BUTTON START (for Entry Function): Back Door Entry Lock and Unlock Functions do not Operate

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, or 2) electrical key antenna (for outside luggage compartment), or 3) main body ECU (cowl side junction block LH), or 4) certification ECU (smart key ECU assembly).

WIRING DIAGRAM









INSPECTION PROCEDURE
NOTICE:
Before performing the inspection, check that there are no problems related to the "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
OK -- Continue to next step.
2. CHECK VEHICLE EQUIPMENT
(a) Check if the power back door is equipped on the vehicle.

Result





B -- READ VALUE USING TECHSTREAM (BACK DOOR LOCK SWITCH, BACK DOOR OPENER SWITCH)
A -- Continue to next step.
3. CHECK POWER BACK DOOR OPERATION
(a) When the power back door switch is operated, check that the power back door open and close.
OK:
Power back door is open and close.
NG -- GO TO POWER BACK DOOR SYSTEM
OK -- Continue to next step.
4. READ VALUE USING TECHSTREAM (BACK DOOR LOCK SWITCH, BACK DOOR OPENER SWITCH)
(a) Using the Techstream, read the Data List.

Main Body





Smart Access





OK:
"ON" (switch is pushed) and "OFF" (switch is not pushed) appears on the screen.
NG -- CHECK HARNESS AND CONNECTOR (BACK DOOR OPENER SWITCH - BODY GROUND)
OK -- Continue to next step.
5. CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU [SMART KEY ECU ASSEMBLY] - OUTSIDE ELECTRICAL KEY ANTENNA)





(a) Disconnect the E29 ECU connector.
(b) Disconnect the K23 antenna connector.
(c) 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.
6. REPLACE ELECTRICAL KEY ANTENNA (for Outside Luggage Compartment)
(a) Replace the electrical key antenna (for outside luggage compartment) Removal.
NEXT -- Continue to next step.
7. CHECK ELECTRICAL KEY ANTENNA (for Outside Luggage Compartment) OPERATION
(a) Check that the entry functions operate normally.
OK:
Entry functions operate normally.
NG -- REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)
OK -- END (ELECTRICAL KEY ANTENNA [for Outside Luggage Compartment] IS DEFECTIVE)
8. CHECK HARNESS AND CONNECTOR (BACK DOOR OPENER SWITCH - BODY GROUND)





(a) Disconnect the S7 switch connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE BACK DOOR OPENER SWITCH