Toyota Avalon (XX50) 2019-2022 Service & Repair Manual: Touching Unlock Sensor for Certain Period of Time does not Unlock All Doors

DESCRIPTION

If the entry unlock function of the driver door cannot be operated by touching and holding the unlock sensor of the driver door, but can be operated through other methods, it can be determined that the request code is being transmitted properly from the driver door. In this case, the certification ECU (smart key ECU assembly) may be malfunctioning.

CAUTION / NOTICE / HINT

NOTICE:

• When using the Techstream with the engine switch off, connect the Techstream to the DLC3 and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the Techstream and the vehicle begins. Then select the vehicle type under manual mode and enter the following menus: Body Electrical / Smart Key. While using the Techstream, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the Techstream and the vehicle.
• The smart key system (for Entry Function, Gasoline Model) uses the CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Troubleshoot the smart key system (for Entry Function, Gasoline Model) after confirming that the communication systems are functioning properly.

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• Before replacing the certification ECU (smart key ECU assembly), refer to Precaution.
• Check that there are no electrical key transmitter sub-assemblies in the vehicle.

HINT:

Touching the unlock sensor for a certain period of time to unlock all of the doors can only be performed if the customize setting "Door Unlock Mode2" is set to "Driver".

PROCEDURE

(a) Connect the Techstream to the DLC3.

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

(c) Turn the Techstream on.

(d) Enter the following menus: Customize Setting / Smart Key / Access.

B

PERFORM CUSTOMIZE SETTING

A

(a) Turn the engine switch off.

(b) Open and close the driver door.

(c) With the electrical key transmitter sub-assembly outside of the vehicle, press the lock switch of the electrical key transmitter sub-assembly to lock all of the doors.

(d) Hold the electrical key transmitter sub-assembly at the same height as the door outside handle assembly and approximately 0.3 m (0.984 ft.) from the driver door.

(e) Check that the LED of the electrical key transmitter sub-assembly blinks.

(f) Touch and hold the unlock sensor on the door outside handle assembly (for driver door) for 2.5 seconds or more. HINT: When checking the operation of the unlock sensor again, make sure to perform the procedure from step (a).

*a Unlock Sensor (Backside)

(g) Check that all of the doors unlock.

B

GO TO POWER DOOR LOCK CONTROL SYSTEM

A

(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.

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A

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

B

GO TO POWER DOOR LOCK CONTROL SYSTEM