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Home >> Toyota >> 2012 >> 4Runner Limited, AWD >> Repair and Diagnosis >> Engine Mechanical >> Starter >> Smart Key System (For Start Function) (Diagnostics - Introduction) >> SMART KEY SYSTEM (for Start Function) >> Diagnosis System >> Diagnosis System
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Diagnosis System

  1. DESCRIPTION 
    1. Smart key system (for start function) data and the Diagnostic Trouble Codes (DTCs) can be read through the Data Link Connector 3 (DLC3) of the vehicle. When the function 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 .
  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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