Toyota Corolla Cross Owners & Service Manuals

Toyota Corolla Cross: Entry Exterior Alarm and Answer-back Buzzer do not Sound

DESCRIPTION

The smart key system (for Entry Function) uses the wireless door lock buzzer to perform various vehicle exterior warnings. When the conditions of each warning are met, the certification ECU (smart key ECU assembly) sends a buzzer activation request signal to the main body ECU (multiplex network body ECU) via CAN communication and the buzzer sounds.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

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

    Click here

  • Before replacing the certification ECU (smart key ECU assembly) or main body ECU (multiplex network body ECU), refer to Precaution.

    Click here

  • After repair, confirm that no DTCs are output.

PROCEDURE

1.

CHECK CUSTOMIZE SETTING (WIRELESS BUZZER RESPONSE FUNCTION)

(a) Read the customize setting according to the display on the GTS.

Wireless Door Lock

Tester Display

Description

Default

Setting

ECU

Wireless Buzzer Response Function

Wireless buzzer response

Enable

$00:Disable,$01:Enable

Main body ECU (multiplex network body ECU)

Result

Proceed to

"Enable" is displayed

A

"Disable" is displayed

B

B

PERFORM CUSTOMIZE SETTING

A

2.

CHECK WIRELESS DOOR LOCK CONTROL SYSTEM

(a) Check that the function operates normally.

Click here

Result

Proceed to

Wireless door lock function operates normally

A

Wireless door lock function does not operate normally

B

B

GO TO PROBLEM SYMPTOMS TABLE

A

3.

READ VALUE USING GTS (EACH UNLOCK DETECTION SWITCH)

(a) Read the Data List according to the display on the GTS.

Body Electrical > Main Body > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

FR Door Lock Position Switch Status

Front door RH unlock detection switch signal

Unlock or Lock

Unlock: Front door RH unlocked

Lock: Front door RH locked

-

FL Door Lock Position Switch Status

Front door LH unlock detection switch signal

Unlock or Lock

Unlock: Front door LH unlocked

Lock: Front door LH locked

-

RR Door Lock Position Switch Status

Rear door RH unlock detection switch signal

Unlock or Lock

Unlock: Rear door RH locked

Lock: Rear door RH unlocked

-

RL Door Lock Position Switch Status

Rear door LH unlock detection switch signal

Unlock or Lock

Unlock: Rear door LH locked

Lock: Rear door LH unlocked

-

Body Electrical > Main Body > Data List

Tester Display

FR Door Lock Position Switch Status

FL Door Lock Position Switch Status

RR Door Lock Position Switch Status

RL Door Lock Position Switch Status

OK:

The GTS display changes correctly in response to the lock/unlock operation.

NG

GO TO LIGHTING SYSTEM (Proceed to Door Unlock Detection Switch Circuit)

OK

4.

PERFORM ACTIVE TEST USING GTS (WIRELESS BUZZER)

(a) Perform Active Test according to the display on the GTS.

Body Electrical > Main Body > Active Test

Tester Display

Measurement Item

Control Range

Diagnostic Note

Wireless Buzzer

Wireless door lock buzzer

OFF/ON

-

Body Electrical > Main Body > Active Test

Tester Display

Wireless Buzzer

Result

Proceed to

Wireless door lock buzzer does not sound

A

Wireless door lock buzzer sounds

B

A

GO TO WIRELESS DOOR LOCK CONTROL SYSTEM (NO ANSWER-BACK)

B

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

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