FixVault

How To Proceed With Troubleshooting

WARNING: This page is about a different car, the 2008 Lexus GS 350. However, it is still accessible from the selected car via links, so may be relevant.

HINT:

  1. VEHICLE BROUGHT TO WORKSHOP 
  2. INSPECT BATTERY VOLTAGE 

    Standard voltage: 11 to 14 V 

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

  3. INSPECT COMMUNICATION FUNCTION OF LARGE-SCALE MULTIPLEX COMMUNICATION SYSTEM (BEAN)* 
    1. Use Techstream to check if the Multiplex Communication System (MPX) is functioning normally.

      Result 

      RESULT REFERENCE

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

    B :  GO TO MULTIPLEX COMMUNICATION SYSTEM

    A : Go to next step 

  4. CHECK FOR DTC* 
    1. Check for DTC and note any codes that are output.
    2. Delete DTC.
    3. Recheck DTC.

      Result 

      RESULT REFERENCE

      Result Proceed to
      DTC does not reoccur A
      DTC reoccurs B

    B :  GO TO DIAGNOSTIC TROUBLE CODE CHART 

    A : Go to next step 

  5. PROBLEM SYMPTOMS TABLE 

    Result 

    RESULT REFERENCE

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

    B :  Go to step  7

    A : Go to next step 

  6. OVERALL ANALYSIS AND TROUBLESHOOTING* 
    1. Terminals of ECU (See TERMINALS OF ECU  )
    2. DATA LIST/ACTIVE TEST (See DATA LIST / ACTIVE TEST  )
  7. REPAIR OR REPLACE 
  8. CONFIRMATION TEST 

    NEXT : END