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Home >> Toyota >> 2019 >> Highlander Limited, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 27 (Dynamic Radar Cruise Control System (2GR-FE) - Diagnostic Codes & Circuit Tests (Except Hybrid)) >> Dynamic Radar Cruise Control System >> DTC P1575: Warning Buzzer Malfunction [12/2013 - 11/2016] >> Procedure

DTC P1575: Warning Buzzer Malfunction [12/2013 - 11/2016]: Procedure

WARNING: This page is about a different car, the 2016 Toyota Highlander, 2015 Toyota Highlander, and 2014 Toyota Highlander. However, it is still accessible from the selected car via links, so may be relevant.
  1. PERFORM ACTIVE TEST USING TECHSTREAM (SKID CONTROL BUZZER ASSEMBLY) 
    1. Connect the Techstream to the DLC3.
    2. Turn the engine switch on (IG).
    3. Turn the Techstream on.
    4. Enter the following menus: Body Electrical / Pre-Collision 2 / Active Test
    5. Perform "Active Test" according to the display on the Techstream.

      Body Electrical > Pre-Collision 2 > Active Test 

      Tester Display Measurement Item Control Range Diagnostic Note
      Radar Cruise Approach Alarm Buzzer Skid control buzzer assembly ON or OFF Buzzer can be heard

      Body Electrical > Pre-Collision 2 > Active Test 

      Tester Display
      Radar Cruise Approach Alarm Buzzer

      OK

      Skid control buzzer assembly sounds.

      Result

      Proceed to
      OK
      NG
    6. Turn the engine switch off.

    Result:  1

    OK 

    See step  5

    Result:  2

    NG 

    See step  2

  2. INSPECT SKID CONTROL BUZZER ASSEMBLY 
    1. Remove the skid control buzzer assembly.
    2. Connect a negative (-) lead from the battery to terminal 2, and a positive (+) lead to terminal 1 of the skid control buzzer, and then check that the buzzer sounds.
      GTY444565Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK

      The skid control buzzer sounds.

    3. Install the skid control buzzer assembly.

      Result

      Proceed to
      OK
      NG

    Result:  2

    NG 

    REPLACE SKID CONTROL BUZZER ASSEMBLY 

    Result:  1

    OK 

    See step  3

  3. CHECK TERMINAL VOLTAGE (POWER SOURCE OF SKID CONTROL BUZZER ASSEMBLY) 
    1. Disconnect the A59 skid control buzzer assembly connector.
      GTY446356Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Front view of wire harness connector
      (to Skid Control Buzzer Assembly)
    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection Condition Specified Condition
      A59-2 (IG1) - Body ground Engine switch on (IG) 11 to 14 V
      A59-2 (IG1) - Body ground Engine switch off Below 1 V
    3. Reconnect the A59 skid control buzzer assembly connector.

      Result

      Proceed to
      OK
      NG

    Result:  2

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR (SKID CONTROL BUZZER ASSEMBLY - BATTERY) 

    Result:  1

    OK 

    See step  4

  4. CHECK HARNESS AND CONNECTOR (SKID CONTROL BUZZER ASSEMBLY - MILLIMETER WAVE RADAR SENSOR ASSEMBLY) 
    1. Disconnect the A59 skid control buzzer assembly connector.
    2. Disconnect the A3 millimeter wave radar sensor assembly connector.
    3. Disconnect the S4 lane departure warning camera connector (w/ Lane Departure Alert System).
    4. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      A59-1 (BZ) - A3-10 (BZ) Always Below 1 Ω
      A59-1 (BZ) or A3-10 (BZ) - Body ground Always 10 kΩ or higher
    5. Reconnect the S4 lane departure warning camera connector (w/ Lane Departure Alert System).
    6. Reconnect the A3 millimeter wave radar sensor assembly connector.
    7. Reconnect the A59 skid control buzzer assembly connector.

      Result

      Proceed to
      OK
      NG

    Result:  2

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR (SKID CONTROL BUZZER ASSEMBLY - MILLIMETER WAVE RADAR SENSOR ASSEMBLY) 

    Result:  1

    OK 

    See step  5

  5. REPLACE MILLIMETER WAVE RADAR SENSOR ASSEMBLY 
    1. Replace the millimeter wave radar sensor assembly with a new one.

      Refer to REMOVAL [12/2013 - 11/2016]

    2. Perform millimeter wave radar sensor assembly adjustment.

      Refer to ADJUSTMENT [12/2013 - 11/2016]

    Result: 

    NEXT 

  6. CHECK FOR DTCs (RADAR CRUISE) 
    1. Connect the Techstream to the DLC3.
    2. Turn the engine switch on (IG).
    3. Clear the DTCs.

      Refer to DTC CHECK / CLEAR [12/2013 - 11/2016]

    4. Perform the following to make sure that the DTC detection conditions are met.

      HINT: 

      If the detection conditions are not met, the malfunction cannot be detected.

      1. Drive the vehicle at a speed for which cruise control operation is possible.
      2. Turn the dynamic radar cruise control system on using the cruise control main switch (ON-OFF button).
      3. Push the cruise control main switch to -SET to activate the dynamic radar cruise control system.
    5. Enter the following menus: Powertrain / Radar Cruise / Trouble Codes.
    6. Check for DTCs.

      Powertrain > Radar Cruise > Trouble Codes 

      NOTE:

      When replacing the driving support ECU assembly, always replace it with a new one. If a driving support ECU assembly which was installed to another vehicle is used, the information stored in the driving support ECU assembly will not match the information from the vehicle. As a result, a DTC may be stored.

      Result

      Result Proceed to
      DTC P1575 is not output A
      DTC P1575 is output B
    7. Turn the engine switch off.

    Result:  1

    A 

    END (MILLIMETER WAVE RADAR SENSOR ASSEMBLY WAS DEFECTIVE) 

    Result:  2

    B 

    See step  7

  7. REPLACE DRIVING SUPPORT ECU ASSEMBLY 
    1. Replace the driving support ECU assembly with a new one.

      Refer to REMOVAL [12/2013 - ]

    Result: 

    NEXT 

  8. CHECK FOR DTCs (RADAR CRUISE) 
    1. Connect the Techstream to the DLC3.
    2. Turn the engine switch on (IG).
    3. Clear the DTCs.

      Refer to DTC CHECK / CLEAR [12/2013 - 11/2016]

    4. Perform the following to make sure that the DTC detection conditions are met.

      HINT: 

      If the detection conditions are not met, the malfunction cannot be detected.

      1. Drive the vehicle at a speed for which cruise control operation is possible.
      2. Turn the dynamic radar cruise control system on using the cruise control main switch (ON-OFF button).
      3. Push the cruise control main switch to -SET to activate the dynamic radar cruise control system.
    5. Enter the following menus: Powertrain / Radar Cruise / Trouble Codes.
    6. Check for DTCs.

      Powertrain > Radar Cruise > Trouble Codes 

      NOTE:

      When replacing the driving support ECU assembly, always replace it with a new one. If a driving support ECU assembly which was installed to another vehicle is used, the information stored in the driving support ECU assembly will not match the information from the vehicle. As a result, a DTC may be stored.

      Result

      Result Proceed to
      DTC P1575 is not output A
      DTC P1575 is output B
    7. Turn the engine switch off.

    Result:  1

    A 

    END (DRIVING SUPPORT ECU ASSEMBLY WAS DEFECTIVE) 

    Result:  2

    B 

    REPLACE ECM. Refer to  COMPONENTS [12/2013 - 11/2016] 

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