LIN COMMUNICATION SYSTEM > HOW TO PROCEED WITH TROUBLESHOOTING

for Preparation Click here


HINT:
  1. Use these procedures to troubleshoot the LIN communication system.
  2. *: Use the intelligent tester.



1.VEHICLE BROUGHT TO WORKSHOP

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    2.INSPECT BATTERY VOLTAGE

      Standard voltage:
      11 to 14 V

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


    NEXT


    3.CHECK COMMUNICATION FUNCTION OF CAN COMMUNICATION SYSTEM*

    1. Using the intelligent tester, check the CAN communication system to ensure that there are no malfunctions in the communication system (Click here).
      Result 
      Result
      		Proceed to
      No DTCs output (No CAN communication malfunctions, no ECU communication malfunctions, and no loss of communication)
      		A
      DTCs output (CAN communication malfunction, ECU communication malfunction, or loss of communication)
      		B



    		B.
    GO TO CAN COMMUNICATION SYSTEM (Click here)
    A


    4.CHECK COMMUNICATION FUNCTION OF LIN COMMUNICATION SYSTEM*

    1. Using the intelligent tester, check the LIN communication function to ensure that there are no malfunctions in the communication system (Click here).

      HINT:
      Refer to the Diagnostic Trouble Code Chart for a list of DTCs (Click here).

      Result 
      Result
      		Proceed to
      DTCs output (LIN communication malfunction, ECU communication malfunction, or loss of communication)
      		A
      No DTCs output (No LIN communication malfunctions, no ECU communication malfunctions, and no loss of communication)
      		B



    		B.
    GO TO DIAGNOSTIC TROUBLE CODE CHART (Click here)
    A


    5.CHECK FOR DTCS*

    1. Check for DTCs and write down any DTCs that are output (Click here).

    2. Clear DTCs (Click here).

    3. Reproduce the DTC detection conditions and confirm that the DTC(s) are output again.
      Result 
      Result
      		Proceed to
      No DTC output (when the DTC detection conditions can be reproduced)
      		A
      No DTC output (when the DTC detection conditions cannot be reproduced)
      		B
      DTCs output
      		C



    		B.
    GO TO SYMPTOM SIMULATION (Click here)

    		C.
    GO TO DIAGNOSTIC TROUBLE CODE CHART (Click here)
    A


    6.OVERALL ANALYSIS AND TROUBLESHOOTING*

    1. Data List/Active Test (Click here).

    2. Terminals of ECU (Click here).


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    7.ADJUST, REPAIR OR REPLACE

      NEXT

      END