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Home >> Toyota >> 2022 >> RAV4 LE, FWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 49 (Wireless Door Lock Control System (HV, W/ Smart Key) - Diagnostic Codes & Symptom Tests) >> WIRELESS DOOR LOCK CONTROL SYSTEM (for HV Model, with Smart Key System) >> No Answer-Back [10/2023 - 11/2024] >> Procedure

No Answer-Back [10/2023 - 11/2024]: Procedure

WARNING: This page is about a different variant/trim than selected.
  1. CHECK VEHICLE TYPE 

    Result

    Result  Proceed to 
    for Type B A
    for Type A B

    Result: 

    B 

    See step  11

    Result: 

    A 

    See step  2

  2. CHECK CUSTOMIZE SETTING 
    1. 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 ON 0:OFF, 1:ON Main body ECU (Multiplex network body ECU)
      Wireless Buzzer Vol Wireless door lock buzzer volume Level5 0000:Level7, 0001:Level6, 0010:Level5, 0011:Level4, 0100:Level3, 0101:Level2, 0110:Level1, 0111:Level0 Main body ECU (Multiplex network body ECU)

      Result

      Result Proceed to
      Both items are ON and except Level 0 A
      Either item is OFF or Level 0 B

    Result: 

    B 

    PERFORM CUSTOMIZE FUNCTION 

    Refer to CUSTOMIZE PARAMETERS [10/2023 - 11/2024]

    Result: 

    A 

    See step  3

  3. CHECK WIRELESS DOOR LOCK CONTROL FUNCTIONS 
    1. Check the wireless door lock control function using the electrical key transmitter sub-assembly.

      Refer to OPERATION CHECK [10/2023 - 11/2024]

      Result

      Result Proceed to
      Wireless door lock/unlock operates properly A
      Wireless door lock/unlock does not operate properly B

    Result: 

    B 

    GO TO PROBLEM SYMPTOMS TABLE 

    Refer to PROBLEM SYMPTOMS TABLE [11/2018 - ]

    Result: 

    A 

    See step  4

  4. READ VALUE USING TECHSTREAM (FR Door Lock Pos, FL Door Lock Pos, RR Door Lock Pos, RL Door Lock Pos) 
    1. Read the Data List according to the display on the Techstream.

      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 unlock detection switch signal*1 OFF or ON OFF: Rear door RH locked
      ON: Rear door RH unlocked      		 -
      RL-Door Lock Pos SW Rear door LH unlock detection switch signal*1
      Rear door LH and RH unlock detection switch signal*2      		 OFF or ON OFF: Rear door LH locked*1
      OFF: Rear door LH and RH locked*2
      ON: Rear door LH unlocked*1
      ON: Rear door LH or RH unlocked*2      		 -
      1. *1: w/ Memory Call Function
      2. *2: w/o Memory Call Function

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

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

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

    Refer to Door Unlock Detection Switch Circuit [10/2023 - 11/2024]

    Result: 

    OK 

    See step  5

  5. CHECK WIRELESS ANSWER-BACK OPERATION 
    1. Check the wireless answer-back operation using the electrical key transmitter sub-assembly.

      Refer to OPERATION CHECK [10/2023 - 11/2024]

      Result

      Result Proceed to
      Only wireless door lock buzzer answer-back does not occur A
      Only hazard warning light answer-back does not occur B

    Result: 

    B 

    See step  10

    Result: 

    A 

    See step  6

  6. PERFORM ACTIVE TEST USING TECHSTREAM (Wireless Buzzer) 
    1. Perform Active Test according to the display on the Techstream.

      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

      Result Proceed to
      Wireless buzzer does not sound A
      Wireless buzzer sounds B

    Result: 

    B 

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) 

    Refer to REMOVAL [10/2023 - ]

    Result: 

    A 

    See step  7

  7. CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) 
    1. Disconnect the A18 wireless door lock buzzer connector.
    2. Perform the Active Test using the Techstream and sound the wireless door lock buzzer.

      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
    3. While performing the Active Test, measure the voltage between the terminals of the wireless door lock buzzer.

      Standard Voltage

      Tester Connection Condition Specified Condition
      A18-1 (B) - A18-2 (E) Active Test Wireless Buzzer ON Pulse generation
      (frequency: 2 kHz, high voltage: 11 to 14 V, low voltage: below 1 V)
      Active Test Wireless Buzzer OFF Below 1 V

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE WIRELESS DOOR LOCK BUZZER 

    Refer to REMOVAL [08/2020 - ]

    Result: 

    NG 

    See step  8

  8. CHECK HARNESS AND CONNECTOR (WIRELESS DOOR LOCK BUZZER - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND BODY GROUND) 
    1. Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.

      Refer to REMOVAL [10/2023 - ]

    2. Disconnect the A18 wireless door lock buzzer connector.
    3. Reconnect the 4F instrument panel junction block assembly connector.
    4. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      A18-1 (B) - A-21 (BZR) Always Below 1 Ω
      A18-2 (E) - Body ground Always Below 1 Ω
      A18-1 (B) or A-21 (BZR) - Other terminals and body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) 

    Refer to REMOVAL [10/2023 - ]

    Result: 

    NG 

    See step  9

  9. CHECK HARNESS AND CONNECTOR (WIRELESS DOOR LOCK BUZZER - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY) 
    1. Disconnect the 4F instrument panel junction block assembly connector.
    2. Disconnect the A18 wireless door lock buzzer connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      A18-1 (B) - 4F-29 Always Below 1 Ω
      A18-1 (B) or 4F-29 - Other terminals and body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY 

    Refer to REMOVAL [10/2023 - ]

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  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
      NG

    Result: 

    OK 

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) 

    Refer to REMOVAL [10/2023 - ]

    Result: 

    NG 

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

    Refer to Hazard Warning Switch Circuit [10/2022 - ]

  11. CHECK CUSTOMIZE SETTING (Wireless Buzzer Response Function, Hazard Answer Back Function, Wireless Buzzer Volume Setting) 
    1. 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

      Result Proceed to
      All settings are Enable and other than Level0 A
      A setting is Disable or Level0 B

    Result: 

    B 

    PERFORM CUSTOMIZE FUNCTION 

    Refer to CUSTOMIZE PARAMETERS [10/2023 - 11/2024]

    Result: 

    A 

    See step  12

  12. CHECK WIRELESS DOOR LOCK CONTROL FUNCTIONS 
    1. Check the wireless door lock control function using the electrical key transmitter sub-assembly.

      Refer to OPERATION CHECK [10/2023 - 11/2024]

      Result

      Result Proceed to
      Wireless door lock/unlock operates properly A
      Wireless door lock/unlock does not operate properly B

    Result: 

    B 

    GO TO PROBLEM SYMPTOMS TABLE 

    Refer to PROBLEM SYMPTOMS TABLE [11/2018 - ]

    Result: 

    A 

    See step  13

  13. READ VALUE USING TECHSTREAM (Each Door Lock Position Switch Status) 
    1. Read the Data List according to the display on the Techstream.

      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*1 Lock or Unlock Lock: Rear door RH locked*1
      Unlock: Rear door RH unlocked*1      		 -
      RL Door Lock Position Switch Status Rear door LH unlock detection switch signal*1
      Rear door LH and RH unlock detection switch signal*2      		 Lock or Unlock Lock: Rear door LH locked*1, or rear door LH and RH locked*2
      Unlock: Rear door LH unlocked*1, or rear door LH or RH unlocked*2      		 -
      1. *1: w/ Memory Call Function
      2. *2: w/o Memory Call Function

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

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

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

    Refer to Door Unlock Detection Switch Circuit [10/2023 - 11/2024]

    Result: 

    OK 

    See step  14

  14. CHECK WIRELESS ANSWER-BACK OPERATION 
    1. Check the wireless answer-back operation using the electrical key transmitter sub-assembly.

      Refer to OPERATION CHECK [10/2023 - 11/2024]

      Result

      Result Proceed to
      Only wireless door lock buzzer answer-back does not occur A
      Only hazard warning light answer-back does not occur B

    Result: 

    B 

    See step  19

    Result: 

    A 

    See step  15

  15. PERFORM ACTIVE TEST USING TECHSTREAM (Wireless Buzzer) 
    1. Perform the Active Test according to the display on the Techstream.

      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.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) 

    Refer to REMOVAL [10/2023 - ]

    Result: 

    OK 

    See step  16

  16. CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) 
    1. Disconnect the A18 wireless door lock buzzer connector.
    2. Perform the Active Test using the GTS and sound the wireless door lock buzzer.

      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
    3. While performing the Active Test, measure the voltage between the terminals of the wireless door lock buzzer.

      Standard Voltage

      Tester Connection Condition Specified Condition
      A18-1 (B) - A18-2 (E) Active Test Wireless Buzzer ON Pulse generation
      (frequency: 2 kHz, high voltage: 11 to 14 V, low voltage: below 1 V)
      Active Test Wireless Buzzer OFF Below 1 V

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE WIRELESS DOOR LOCK BUZZER 

    Refer to REMOVAL [08/2020 - ]

    Result: 

    NG 

    See step  17

  17. CHECK HARNESS AND CONNECTOR (WIRELESS DOOR LOCK BUZZER - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND BODY GROUND) 
    1. Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.

      Refer to REMOVAL [10/2023 - ]

    2. Disconnect the A18 wireless door lock buzzer connector.
    3. Reconnect the 4F instrument panel junction block assembly connector.
    4. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      A18-1 (B) - A-21 (BZR) Always Below 1 Ω
      A18-2 (E) - Body ground Always Below 1 Ω
      A18-1 (B) or A-21 (BZR) - Other terminals and body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) 

    Refer to REMOVAL [10/2023 - ]

    Result: 

    NG 

    See step  18

  18. CHECK HARNESS AND CONNECTOR (WIRELESS DOOR LOCK BUZZER - INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY) 
    1. Disconnect the 4F instrument panel junction block assembly connector.
    2. Disconnect the A18 wireless door lock buzzer connector.
    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      A18-1 (B) - 4F-29 Always Below 1 Ω
      A18-1 (B) or 4F-29 - Other terminals and body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY 

    Refer to REMOVAL [10/2023 - ]

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  19. 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
      NG

    Result: 

    OK 

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) 

    Refer to REMOVAL [10/2023 - ]

    Result: 

    NG 

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

    Refer to Hazard Warning Switch Circuit [10/2022 - ]

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