Toyota Venza: Entry Answer-back Buzzer does not Sound

Toyota Venza Service Manual / Theft Deterrent / Keyless Entry / Smart Key System(for Entry Function) / Entry Answer-back Buzzer does not Sound

DESCRIPTION

The smart key system uses the wireless door lock buzzer to perform various vehicle exterior warnings. When the conditions for each warning are met, the certification ECU (smart key ECU assembly) sends a buzzer request signal to the main body ECU (driver side junction block assembly) via CAN communication. The wireless door lock assembly sounds the buzzer according to the signal from the main body ECU.

CAUTION / NOTICE / HINT

NOTICE:

The smart key system (for entry function) uses a multiplex communication system (LIN communication system) and CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting (See page ). Troubleshoot the smart key system (for entry
function) after confirming that the communication system is functioning properly.

PROCEDURE

1.	READ VALUE USING TECHSTREAM (ANSWER-BACK BUZZER FUNCTION)

(a) Connect the Techstream to the DLC3.

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

(d) Enter the following menus: Body Electrical / Main Body / Data List.

(e) Read the Data List according to the display on the Techstream.

Main Body (Main Body ECU (Driver Side Junction Block Assembly))

Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
Wireless Buzzer Resp	Answer-back buzzer operation / ON or OFF	Customization status displayed	-

Result	Proceed to
Customize setting is ON.	A
Customize setting is OFF.	B

PERFORM CUSTOMIZE SETTING (Proceed to Customize Parameters)

2.	PERFORM ACTIVE TEST USING TECHSTREAM

(a) Enter the following menus: Body Electrical / Main Body / Active Test.

(b) Perform the Active Test according to the display on the Techstream.

Main Body (Main Body ECU (Driver Side Junction Block Assembly))

Tester Display	Test Part	Control Range	Diagnostic Note
Wireless Buzzer	Turns the wireless door lock buzzer	ON/OFF	-

OK:

Wireless door lock buzzer sounds.

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

GO TO WIRELESS DOOR LOCK CONTROL SYSTEM (Proceed to No Answer-Back)

Open in Front Passenger Side Electrical Antenna Circuit (B27A2)

DESCRIPTION The certification ECU (smart key ECU assembly) generates a request signal and sends it to the door electrical key oscillator built into the front door outside handle assembly (for fro ...

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DESCRIPTION When the entry door lock and unlock functions and wireless door lock and unlock functions do not operate, radio wave interference, or a malfunction in the key or signal circuit betwee ...

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