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Home >> Lexus >> 2012 >> IS F >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Communication Devices >> Multiplex Communication System (Diagnostics - Introduction) >> Multiplex Communication System >> Diagnosis System >> Diagnosis System

Diagnosis System

  1. DESCRIPTION 
    1. The gateway ECU controls the functions of the multiplex communication system on the vehicle. Data of the multiplex communication system and the Diagnostic Trouble Codes (DTC) can be read through the Data Link Connector 3 (DLC3) of the vehicle.
  2. CHECK DLC3 
    1. Check the DLC3. Refer to GENERAL INFORMATION .
  3. INSPECT BATTERY VOLTAGE 

    Standard Voltage

    11 to 14 V

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

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