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
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
NOTICE:
* The smart access system with push-button start (for Entry Function) uses a multiplex communication system (LIN communication system) and the CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting How To Proceed With Troubleshooting. Troubleshoot the smart access system with push-button start (for Entry Function) after confirming that the communication systems are functioning properly.
* When using the Techstream with the power switch off to troubleshoot:
Connect the Techstream to the DLC3 and turn a courtesy light switch on and off at 1.5-second intervals until communication between the Techstream and vehicle begins.
* Check that there are no electrical key transmitters in the vehicle.
* Before replacing the certification ECU (smart key ECU assembly), refer to the smart access system with push-button start (for Entry Function) Smart Access System With Push-Button Start (For Entry Function).
* After repair, confirm DTC not reoccur with performing the "DTC Output Confirmation Operation".
PROCEDURE
1. CHECK POWER DOOR LOCK OPERATION
(a) 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 Operation Check.
OK:
Door locks operate normally.
NG -- GO TO POWER DOOR LOCK CONTROL SYSTEM How To Proceed With Troubleshooting
OK -- Continue to next step.
2. READ VALUE USING TECHSTREAM (BACK DOOR OPENER SWITCH)
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Main Body / Data List.
(e) Read the Data List according to the display on the Techstream.
Smart Access
OK:
On the Techstream 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)
OK -- Continue to next step.
3. CHECK WAVE ENVIRONMENT
(a) 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 Operation Check.
Text in Illustration
NOTICE:
If the key is brought within 0.2 m (0.66 ft.) of the rear bumper, communication may not possible.
HINT
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
OK -- AFFECTED BY WAVE INTERFERENCE
4. CHECK ELECTRICAL KEY ANTENNA IN KEY DIAGNOSTIC MODE
(a) Check the following antenna in the key diagnostic mode System Description.
(1) Check the electrical key antenna (outside luggage).
Text in Illustration
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)
OK -- REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) Removal
5. CHECK HARNESS AND CONNECTOR (ELECTRICAL KEY ANTENNA - CERTIFICATION ECU)
(a) Disconnect the Q11 electrical key antenna (outside luggage) connector.
(b) Disconnect the H2 certification ECU (smart key ECU assembly) 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. INSPECT ELECTRICAL KEY ANTENNA (OUTSIDE LUGGAGE)
(a) Remove the electrical key antenna (outside luggage) Removal.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Text in Illustration
NG -- REPLACE ELECTRICAL KEY ANTENNA (OUTSIDE LUGGAGE) Removal
OK -- REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) Removal
7. CHECK HARNESS AND CONNECTOR (BACK DOOR OPENER SWITCH - BODY GROUND)
(a) Disconnect the back door opener switch assembly connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Text in Illustration
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE BACK DOOR OPENER SWITCH ASSEMBLY Removal