WIRELESS DOOR LOCK CONTROL SYSTEM(w/ Entry and Start System) No Answer-Back

DTC Code DTC Name
No Answer-Back

DESCRIPTION

In some cases, wireless door lock control functions are normal but the hazard warning light and/or wireless door lock buzzer answer-back function* does 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.

  • *: w/ Wireless Door Lock Buzzer Answer Back Function

WIRING DIAGRAM

B343414E01

CAUTION / NOTICE / HINT

Note:

  • 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 systems are functioning properly.

    Click hereClick here

  • When replacing the main body ECU (multiplex network body ECU), make sure to replace it with a new one.

PROCEDURE

  1. READ VALUE USING GTS (Hazard Answer Back, Wireless Buzzer Resp, Wireless Buzzer Vol)

    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Customize Setting / Wireless Door Lock.

    5. Select the setting by referring to the table below.

      Wireless Door Lock

      Tester Display

      Description

      Default

      Setting

      ECU

      Hazard Answer Back

      When the doors are locked by wireless operation, the hazard warning lights flash once.

      When the doors are unlocked by wireless operation, the hazard warning lights flash twice.

      ON

      0:OFF,1:ON

      Main body ECU (Multiplex network body ECU)

      Wireless Buzzer Resp

      Wireless door lock buzzer response*1

      ON

      0:OFF,1:ON

      Main body ECU (Multiplex network body ECU)

      Wireless Buzzer Vol

      Wireless door lock buzzer volume*1

      Level 5*2

      Level 7*3

      0000:Level7,0001:Level6,0010:Level5,0011:Level4,0100:Level3,0101:Level2,0110:Level1,0111:Level0

      Main body ECU (Multiplex network body ECU)

      • *1: w/ Wireless Door Lock Buzzer Answer Back Function

      • *2: w/ Power Back Door System

      • *3: w/o Power Back Door System

    Result

    Proceed to

    Both items are ON and except Level 0

    Either item is OFF or Level 0
    Either item is OFF or Level 0

    PERFORM CUSTOMIZE FUNCTION

    Click here

    Both items are ON and except Level 0

  2. CHECK WIRELESS DOOR LOCK CONTROL FUNCTIONS

    1. Check the wireless door lock control function using the electrical key transmitter sub-assembly.

    Result

    Proceed to

    Wireless door lock/unlock operates properly

    Wireless door lock/unlock does not operate properly
    Wireless door lock/unlock does not operate properly

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

    Click hereClick here

    Wireless door lock/unlock operates properly

  3. READ VALUE USING GTS (FR Door Lock Pos, FL Door Lock Pos, RR-Door Lock Pos SW, RL-Door Lock Pos SW)

    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / Main Body / Data List.

    5. 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 Pos

      Front door RH unlock detection switch signal

      LOCK or UNLOCK

      LOCK: Front door RH locked

      UNLOCK: Front door RH unlocked

      -

      FL Door Lock Pos

      Front door LH unlock detection switch signal

      LOCK or UNLOCK

      LOCK: Front door LH locked

      UNLOCK: Front door LH unlocked

      -

      RR-Door Lock Pos SW

      Rear door RH and LH unlock detection switch signal

      ON or OFF

      ON: Rear door RH or LH unlocked

      OFF: Rear door RH and LH locked

      *1

      RL-Door Lock Pos SW

      Rear door RH and LH unlock detection switch signal

      ON or OFF

      ON: Rear door RH or LH unlocked

      OFF: Rear door RH and LH locked

      *2

      • *1: When checking RR-Door Lock Pos SW, make sure to check it with the rear door LH locked.

      • *2: When checking RL-Door Lock Pos SW, make sure to check it with the rear door RH locked.

      Body Electrical > Main Body > Data List

      Tester Display

      FR Door Lock Pos

      FL Door Lock Pos

      RR-Door Lock Pos SW

      RL-Door Lock Pos SW

      OK

      The display on the GTS changes according to the detection condition of the door unlock detection switch.

    Result

    Proceed to

    OK

    NG
    NG

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

    Click hereClick here

    OK

  4. CHECK WIRELESS ANSWER-BACK OPERATION

    1. Check the wireless answer-back operation using the electrical key transmitter sub-assembly.

    Result

    Proceed to

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

    Only hazard warning light answer-back does not occur

    *: w/ Wireless Door Lock Buzzer Answer Back Function

    Only hazard warning light answer-back does not occur

    CHECK HAZARD WARNING LIGHTS OPERATIONClick here

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

  5. PERFORM ACTIVE TEST USING GTS (WIRELESS BUZZER)

    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / Main Body / Active Test.

    5. Perform the Active Test according to the display on the GTS.

      Body Electrical > Main Body > Active Test

      Tester Display

      Measurement Item

      Control Range

      Restrict Condition

      Wireless Buzzer

      Wireless door lock buzzer

      OFF or ON

      -

      Body Electrical > Main Body > Active Test

      Tester Display

      Wireless Buzzer

    Result

    Proceed to

    Wireless door lock buzzer does not turn on or off

    Wireless door lock buzzer turns on or off (for LHD)

    Wireless door lock buzzer turns on or off (for RHD)
    Wireless door lock buzzer turns on or off (for LHD)

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

    Click here

    Wireless door lock buzzer turns on or off (for RHD)

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

    Click here

    Wireless door lock buzzer does not turn on or off

  6. CHECK HARNESS AND CONNECTOR (WIRELESS DOOR LOCK BUZZER - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)

    1. Disconnect the A12 wireless door lock buzzer connector.

    2. Disconnect the 3B instrument panel junction block assembly connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      A12-1 (B) - 3B-55

      Always

      Below 1 Ω

      A12-2 (E) - Body ground

      Always

      Below 1 Ω

      A12-1 (B) - Body ground

      Always

      10 kΩ or higher

      3B-55 - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  7. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

    1. Remove the instrument panel junction block assembly.

      for LHD:

      Click here

      for RHD:

      Click here

      B337496C02

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      3B-55 - A-21 (BZR)

      Always

      Below 1 Ω

      3B-55 or A-21 (BZR) - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG (for LHD)

    NG (for RHD)
    NG (for LHD)

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

    Click here

    NG (for RHD)

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

    Click here

    OK

  8. REPLACE WIRELESS DOOR LOCK BUZZER

    1. Temporarily replace the wireless door lock buzzer with a new one or normally functioning one.

      Click here

    Result

    Proceed to

    NEXT
    NEXT

  9. CHECK WIRELESS DOOR LOCK BUZZER OPERATION

    1. Check the operation of the wireless answer-back function.

      OK

      Wireless answer-back function operates normally.

    Result

    Proceed to

    OK

    NG (for LHD)

    NG (for RHD)
    OK

    END (WIRELESS DOOR LOCK BUZZER WAS DEFECTIVE)

    NG (for LHD)

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

    Click here

    NG (for RHD)

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

    Click here

  10. CHECK HAZARD WARNING LIGHTS OPERATION

    1. Check that the hazard warning lights blink when the hazard warning signal switch is pressed.

      OK

      Hazard warning lights blink.

    Result

    Proceed to

    OK (for LHD)

    OK (for RHD)

    NG
    OK (for LHD)

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

    Click here

    OK (for RHD)

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

    Click here

    NG

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

    Click here