LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Toyota >> 2021 >> 4Runner Limited, AWD >> Repair and Diagnosis >> Body & Frame >> Door Locks >> Smart Key System (For Start Function) - Diagnostics - Introduction >> SMART KEY SYSTEM (for Start Function) >> Diagnosis System [08/2015 - ] >> Diagnosis System [08/2015 - ]
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Diagnosis System [08/2015 - ]

  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 [08/2015 - ] ).
  3. INSPECT BATTERY VOLTAGE 

    Standard voltage

    11 to 14 V

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