FixVault

How To Proceed With Troubleshooting

WARNING: This page is about a different car, the 2012 Lexus GX 460. However, it is still accessible from the selected car via links, so may be relevant.

HINT: 

  1. VEHICLE BROUGHT TO WORKSHOP 

    NEXT: Go to next step 

  2. INSPECT BATTERY VOLTAGE 
    1. Measure the voltage with the engine switch off.

      Standard voltage

      11 to 14 V

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

      NEXT: Go to next step 

  3. CHECK COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM* 
    1. Use the Techstream to check if the CAN communication system is functioning normally.
      RESULT

      Result Proceed to
      CAN DTC is not output A
      CAN DTC is output B

      B → GO TO CAN COMMUNICATION SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING 

      A: Go to next step 

  4. CHECK COMMUNICATION FUNCTION OF LIN COMMUNICATION SYSTEM* 
    1. Use the Techstream to check if the LIN communication system is functioning normally.
      RESULT

      Result Proceed to
      LIN DTC is not output A
      LIN DTC is output B

      B → GO TO LIN COMMUNICATION SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING 

      A: Go to next step 

  5. CHECK FOR DTC* 
    1. Check for DTCs and note any codes that are output. Refer to DTC CHECK / CLEAR .
    2. Clear the DTC. Refer to DTC CHECK / CLEAR .
    3. Check for DTCs. Try to prompt the DTC by simulating the original activity that the DTC suggests.
      NOTE:

      The parking assist ECU may store the DTCs of the following system. If DTCs other than those specified in Diagnostic Trouble Code Chart of the side monitor system are output, refer to Diagnostic Trouble Code Chart for the applicable system.

      System Proceed to
      Rear View Monitor System (w/ Side Monitor System) Refer to DIAGNOSTIC TROUBLE CODE CHART 
      Wide View Front Monitor System Refer to DIAGNOSTIC TROUBLE CODE CHART
      RESULT

      Result Proceed to
      DTC is not output A
      DTC is output B

      B → Go to step 8 

      A: Go to next step 

  6. PROBLEM SYMPTOMS TABLE 
    1. Refer to the Problem Symptoms Table. Refer to PROBLEM SYMPTOMS TABLE .
      RESULT

      Result Proceed to
      Fault is not listed in Problem Symptoms Table A
      Fault is listed in Problem Symptoms Table B

      B → Go to step 8 

      A: Go to next step 

  7. OVERALL ANALYSIS AND TROUBLESHOOTING 
    1. Refer to Terminals of ECU. Refer to TERMINALS OF ECU .

      NEXT: Go to next step 

  8. ADJUST, REPAIR OR REPLACE 

    NEXT: Go to next step 

  9. CONFIRMATION TEST 

    NEXT → END