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How To Proceed With Troubleshooting [08/2013 - ]

WARNING: This page is about a different car, the 2014 Lexus ES 300h. 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. CUSTOMER PROBLEM ANALYSIS 

    HINT: 

    • In troubleshooting, confirm that the problem symptoms have been accurately identified. Preconceptions should be discarded in order to make an accurate judgment. To clearly understand what the problem symptoms are, it is extremely important to ask the customer about the problem and the conditions at the time the malfunction occurred.
    • Gather as much information as possible for reference. Past problems that seem unrelated may also help in some cases.
    • The following 5 items are important points for problem analysis:
    What Vehicle, system name
    When Date, time, occurrence frequency
    Where Road conditions
    Under what conditions? Driving conditions, weather conditions
    How did it happen? Problem symptoms

    NEXT: Go to next step 

  3. PRE-CHECK 
    1. Measure the auxiliary battery voltage with the power switch off.

      Standard Voltage

      11 to 14 V

      • If the voltage is below 11 V, recharge or replace the auxiliary battery before proceeding to the next step.
    2. Check the fuses and relays.
    3. Check the connector connections and terminals to make sure that there are no abnormalities such as loose connections, deformation, etc.

      NEXT: Go to next step 

  4. INSPECT COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM* 
    1. Using the Techstream, check if the CAN communication system is functioning normally. Refer to DIAGNOSIS SYSTEM [08/2013 - ] .

      Result

      Result Proceed to
      DTCs are not output A
      DTCs are output B

      B → GO TO CAN COMMUNICATION SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [08/2013 - ] 

      A: Go to next step 

  5. INSPECT COMMUNICATION FUNCTION OF LIN COMMUNICATION SYSTEM* 
    1. Using the Techstream, check if the LIN communication system is functioning normally. Refer to DTC CHECK / CLEAR [08/2013 - ] .

      Result

      Result Proceed to
      DTCs are not output A
      DTCs are output B

      B → GO TO LIN COMMUNICATION SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [08/2013 - ] 

      A: Go to next step 

  6. CHECK FOR DTC* 
    1. Check for DTCs and make a note of any codes that are output. Refer to DTC CHECK / CLEAR [08/2013 - ] .
    2. Clear the DTCs.
    3. Recheck for DTCs.

      Result

      Result Proceed to
      DTCs are not output A
      DTCs are output B

      B → GO TO DIAGNOSTIC TROUBLE CODE CHART. Refer to  DIAGNOSTIC TROUBLE CODE CHART [08/2013 - ]  

      A: Go to next step 

  7. PROBLEM SYMPTOMS TABLE 
    1. Refer to Problem Symptoms Table. Refer to PROBLEM SYMPTOMS TABLE [08/2013 - ] .

      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   9 

      A: Go to next step 

  8. OVERALL ANALYSIS AND TROUBLESHOOTING* 
    1. Operation Check. Refer to OPERATION CHECK [08/2013 - ] .
    2. Terminals of ECU. Refer to TERMINALS OF ECU [08/2013 - ] .
    3. Data List / Active Test. Refer to DATA LIST / ACTIVE TEST [08/2013 - ] .

      NEXT: Go to next step 

  9. ADJUST, REPAIR OR REPLACE 
    1. Check if the sliding roof drive gear sub-assembly has been replaced, or the sliding roof glass sub-assembly or sliding roof drive cable sub-assembly has been adjusted, or removed and installed.

      Result

      Result Proceed to
      The sliding roof drive gear sub-assembly has been replaced, or the sliding roof glass sub-assembly or sliding roof drive cable sub-assembly has been adjusted, or removed and installed. A
      The sliding roof drive gear sub-assembly has not been replaced, and the sliding roof glass sub-assembly and sliding roof drive cable sub-assembly have not been adjusted, or removed and installed. B

      B → Go to step   11 

      A: Go to next step 

  10. INITIALIZE SLIDING ROOF SYSTEM 
    1. Initialize the sliding roof ECU (sliding roof drive gear sub-assembly). Refer to INITIALIZATION [08/2013 - ] .

      HINT: 

      If initialization has not been performed, the auto operation, jam protection function, key-off operation, key-linked function, wireless transmitter-linked function* and sliding roof open warning will not operate or will operate incorrectly.

      • *: w/ Side Marker Light

      NEXT: Go to next step 

  11. CONFIRMATION TEST 

    NEXT → END