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Diagnosis System [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.
  1. DESCRIPTION 

    The main body ECU (multiplex network body ECU) and certification ECU (smart key ECU assembly) control the LIN communication system. LIN communication system data and Diagnostic Trouble Codes (DTCs) can be read through the Data Link Connector 3 (DLC3).

    When the system seems to be malfunctioning, use the Techstream to check for malfunctions and perform repairs.

  2. CHECK DLC3 
    1. Check the DLC3. Refer to GENERAL INFORMATION [08/2013 - ] .
  3. INSPECT AUXILIARY BATTERY VOLTAGE 
    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.
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