Toyota Corolla Cross Owners & Service Manuals

Toyota Corolla Cross: No Answer-Back

DESCRIPTION

In some cases, wireless door lock control functions are normal but the hazard warning light and wireless door lock buzzer answer-back function do not operate. In such cases, hazard warning light and wireless door lock buzzer signal outputs from the main body ECU (multiplex network body ECU) may be malfunctioning.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • The wireless door lock control system uses the CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Troubleshoot the wireless door lock control system after confirming that the communication system is functioning properly.

    Click here

  • If the main body ECU (multiplex network body ECU) is replaced, refer to the Registration.
    • for HEV Model: Click here
    • for Gasoline Model: Click here
  • Before performing the inspection, check that DTC B124296 (wireless door lock control) is not output.

    Click here

PROCEDURE

1.

CHECK CUSTOMIZE SETTING USING GTS

(a) Select the setting by referring to the table below.

Wireless Door Lock

Tester Display

Description

Default

Setting

ECU

Wireless Buzzer Response Function

Function that enables/disables the wireless door lock buzzer response

Enable

$00:Disable,$01:Enable

Main body ECU (Multiplex network body ECU)

Hazard Answer Back Function

Function that flashes the hazard warning lights once when the doors are locked by wireless operation and twice when the doors are unlocked by wireless operation

Enable

$00:Disable,$01:Enable

Main body ECU (Multiplex network body ECU)

Wireless Buzzer Volume Setting

Function that adjusts the wireless door lock buzzer volume

Level5

$00:Level7(MAX),$01:Level6,$02:Level5,$03:Level4,$04:Level3,$05:Level2,$06:Level1,$07:Level0(MIN)

Main body ECU (Multiplex network body ECU)

Result

Proceed to

All settings are Enable and other than Level0

A

A setting is Disable or Level0

B

B

PERFORM CUSTOMIZE FUNCTION

A

2.

CHECK WIRELESS DOOR LOCK CONTROL FUNCTIONS

(a) Check the wireless door lock control function using the electrical key transmitter sub-assembly.

Click here

Result

Proceed to

Wireless door lock/unlock operates properly

A

Wireless door lock/unlock does not operate properly

B

B

GO TO PROBLEM SYMPTOMS TABLE

A

3.

READ VALUE USING GTS (DOOR LOCK POSITION SWITCH STATUS)

(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

Lock or Unlock

Lock: Front door RH locked

Unlock: Front door RH unlocked

-

FL Door Lock Position Switch Status

Front door LH unlock detection switch signal

Lock or Unlock

Lock: Front door LH locked

Unlock: Front door LH unlocked

-

RR Door Lock Position Switch Status

Rear door RH unlock detection switch signal

Lock or Unlock

Lock: Rear door RH locked

Unlock: Rear door RH unlocked

-

RL Door Lock Position Switch Status

Rear door LH unlock detection switch signal

Lock or Unlock

Lock: Rear door LH locked

Unlock: 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.

CHECK WIRELESS ANSWER-BACK OPERATION

(a) Check the wireless answer-back operation using the electrical key transmitter sub-assembly.

Click here

Result

Proceed to

Only wireless door lock buzzer answer-back does not occur.

A

Only hazard warning light answer-back does not occur.

B

B

GO TO STEP 9

A

5.

PERFORM ACTIVE TEST USING GTS (WIRELESS BUZZER)

(a) Perform the 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

OK:

Wireless door lock buzzer sounds

OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

NG

6.

CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

(a) Disconnect the A32 wireless door lock buzzer connector.

(b) Perform the 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

(c) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Condition

Specified Condition

A32-1 (B) - A32-2 (E)

Active Test Wireless Buzzer is OFF

Below 1 V

Active Test Wireless Buzzer is ON

Pulse generation

(frequency: 2 kHz, high voltage: 11 to 14 V, low voltage: below 1 V)

OK

REPLACE WIRELESS DOOR LOCK BUZZER

NG

7.

CHECK HARNESS AND CONNECTOR (WIRELESS DOOR LOCK BUZZER - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND BODY GROUND))

(a) Remove the main body ECU (multiplex network body ECU) from the power distribution box assembly.

Click here

(b) Reconnect the power distribution box assembly connectors.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

A32-1 (B) - MB-3 (BZR)

Always

Below 1 Ω

A32-2 (E) - Body ground

Always

Below 1 Ω

A32-1 (B) or MB-3 (BZR) - Other terminals and body ground

Always

10 kΩ or higher

OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

NG

8.

CHECK HARNESS AND CONNECTOR (WIRELESS DOOR LOCK BUZZER - POWER DISTRIBUTION BOX ASSEMBLY)

(a) Disconnect the 8E power distribution box assembly connector.

(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

A32-1 (B) - 8E-7

Always

Below 1 Ω

A32-1 (B) or 8E-7 - Other terminals and body ground

Always

10 kΩ or higher

OK

REPLACE POWER DISTRIBUTION BOX ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

9.

CHECK HAZARD WARNING LIGHTS OPERATION

(a) Check that the hazard warning lights blink when the hazard warning signal switch is pressed.

OK:

Hazard warning lights blink.

Result

Proceed to

OK

A

NG (w/ AFS)

B

NG (w/o AFS)

C

A

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

B

GO TO LIGHTING SYSTEM (Proceed to Hazard Warning Switch Circuit)

C

GO TO LIGHTING SYSTEM (Proceed to Hazard Warning Switch Circuit)

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