LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Lexus >> 2017 >> LX 570 >> Repair and Diagnosis >> Accessories & Equipment >> Cruise Control Systems >> Dynamic Radar Cruise Control System (Diagnostics - Introduction) >> Dynamic Radar Cruise Control System >> How To Proceed With Troubleshooting [09/2015 - ] >> Procedure
April 5, 2026: LEMON Manuals is launched! Read the announcement.

How To Proceed With Troubleshooting [09/2015 - ]: Procedure

  1. VEHICLE BROUGHT TO WORKSHOP 

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    See step  2

  2. INSPECT BATTERY VOLTAGE 
    1. Measure the battery voltage.

      Standard Voltage

      11 to 14 V

      If the voltage is below 11 V, replace or recharge the battery before proceeding to the next step.

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  3

  3. INSPECT MILLIMETER WAVE RADAR SENSOR ASSEMBLY* 
    1. Adjust the reflector height.

      Refer to ADJUSTMENT [09/2015 - ]

    2. Place the reflector.

      Refer to ADJUSTMENT [09/2015 - ]

    3. Connect the Techstream to the DLC3.
    4. Turn the engine switch on (IG).
    5. Turn the Techstream on.
    6. Turn the cruise control main switch (ON/OFF) on.
    7. Enter the following menus: Body Electrical / Pre-Collision 2 / Utility / Front Beam Axis Misalignment Reading.
    8. Check the amount of misalignment and make a note.
    9. Enter the following menus: Body Electrical / Pre-Collision 2 / Utility / Front Beam Axis Offset Reading.
    10. Check the amount of offset and make a note.

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  4

  4. CHECK CAN COMMUNICATION SYSTEM* 
    1. Using the Techstream, check that the CAN communication system is functioning normally.

      OK

      CAN communication system is functioning normally.

      HINT: 

      Refer to CAN Bus Check for the CAN communication system.

      Refer to DIAGNOSIS SYSTEM [09/2015 - 08/2017] , or refer to DIAGNOSIS SYSTEM [08/2017 - 08/2019] , or refer to DIAGNOSIS SYSTEM [08/2019 - ]

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    GO TO CAN COMMUNICATION SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [09/2015 - 08/2020]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [08/2020 - ] 

    Result: 

    OK 

    See step  5

  5. CHECK FOR DTCs (SFI SYSTEM)* 

    Refer to DTC Check / Clear.

    Refer to DTC CHECK / CLEAR [09/2015 - ]

    1. Check for DTCs and note any codes that are output.
    2. Clear the DTCs.
    3. Recheck for DTCs. Try to reproduce the DTCs by duplicating the conditions indicated by the DTCs.

      Result

      Result Proceed to
      DTC does not reoccur A
      DTC reoccurs B

    Result: 

    GO TO DTC CHART. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [09/2015 - ] 

    Result: 

    See step  6

  6. CHECK FOR DTCs (DYNAMIC RADAR CRUISE CONTROL SYSTEM)* 

    Refer to DTC Check / Clear.

    Refer to DTC CHECK / CLEAR [09/2015 - 08/2020] , or refer to DTC CHECK / CLEAR [08/2020 - ] 

    1. Check for DTCs and note any codes that are output.
    2. Clear the DTCs.
    3. Recheck for DTCs. Try to reproduce the DTCs by duplicating the conditions indicated by the DTCs.

      Result

      Result Proceed to
      DTC does not reoccur A
      DTC reoccurs B

    Result: 

    GO TO DTC CHART. Refer to  DIAGNOSTIC TROUBLE CODE CHART [09/2015 - 08/2020]  , or refer to  DIAGNOSTIC TROUBLE CODE CHART [08/2020 - ]  

    Result: 

    See step  7

  7. PROBLEM SYMPTOMS TABLE 
    1. Refer to Problem Symptoms Table (Refer to PROBLEM SYMPTOMS TABLE [09/2015 - ] ).

      Result

      Result Proceed to
      Fault is not listed in problem symptoms table A
      Fault is listed in problem symptoms table B

    Result: 

    See step  8

    Result: 

    See step  8

  8. OVERALL ANALYSIS AND TROUBLESHOOTING* 
    1. Terminals of ECU.

      Refer to TERMINALS OF ECU [09/2015 - ] 

    2. Data List / Active Test.

      Refer to DATA LIST / ACTIVE TEST [09/2015 - ] 

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  9

  9. ADJUST, REPAIR OR REPLACE 
    NOTE:

    When replacing parts, make sure to check the replacement precautions.

    Refer to PRECAUTION [09/2015 - ] 

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    See step  10

  10. CONFIRMATION TEST 

    Result

    Proceed to
    NEXT

    Result: 

    NEXT 

    END