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Inspection Procedure

  1. RESET MAYDAY ECU 
    1. Exit diagnosis mode and wait for 10 seconds.
      NOTE: After the engine switch is turned off, the HDD navigation system requires approximately 6 minutes to record various types of memory and settings. As a result, after turning the engine switch off, wait 6 minutes or more before disconnecting the cable from the negative (-) battery terminal.
    2. Disconnect the cable from the negative (-) battery terminal, and wait for 1 minute.
    3. Reconnect the cable to the negative (-) battery terminal, and wait for 10 seconds.
    4. Turn the engine switch on (IG), and then check for the current DTC and historic DTC again (see DTC CHECK/CLEAR  ).

      Result 

      RESULT CHART

      Result Proceed to
      Current DTC 2-1 or 2-2 exists A
      Historic DTC 2-1 or 2-2 exists B

      B: CLEAR HISTORIC DTC (See  DTC CHECK/CLEAR   ) 

      A: Go to Next Step 

  2. CHECK MAYDAY ECU 
    1. Press the SERVICES button and check the LEXUS Link condition with the LEXUS Link call center.

      OK: System operates normally. 

      NG: System does not connect to LEXUS Link call center. (Current DTC 2-1 or 2-2 exists.) 

      NG: REPLACE MAYDAY ECU TOGETHER WITH MAYDAY BATTERY AND THEN PERFORM REGISTRATION 

      OK: END 

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