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HOMESERVICE MANUALSTOYOTA20254RUNNER SR5, RWDREPAIR AND DIAGNOSISENGINE PERFORMANCEENGINE CONTROL SYSTEMSSTOP AND START SYSTEM - DIAGNOSTICS - INTRODUCTIONSTOP AND START SYSTEMCHECK MODE PROCEDURE [12/2024 - ]CHECK MODE PROCEDURE [12/2024 - ]
2025 Toyota 4Runner SR5, RWD

Check Mode Procedure [12/2024 - ]

2025 Toyota 4Runner SR5, RWDSECTION Check Mode Procedure [12/2024 - ]

HINT: 

Compared to normal mode, check mode is more sensitive to malfunctions. Therefore, check mode can detect malfunctions that cannot be detected in normal mode.

NOTE:

All the stored DTCs and freeze frame data are cleared if: 1) the engine stop and start ECU is switched from normal mode to check mode or vice versa; or 2) the ignition switch is turned from ON to ACC or off while in check mode. Before changing modes, always check for and note any DTCs and freeze frame data.

  1. CHECK MODE PROCEDURE 
    1. Check and ensure the following conditions:
      1. Battery voltage is 11 V or higher.
      2. Shift lever is in P or N.
      3. A/C switch is off.
    2. Turn the ignition switch off.
    3. Connect the GTS to the DLC3.
    4. Turn the ignition switch to ON.
    5. Turn the GTS on.
    6. Enter the following menus: Powertrain / Stop and Start / Utility / Check Mode.

      Powertrain > Stop and Start > Utility 

      Tester Display
      Check Mode
    7. Switch the engine stop and start ECU from normal mode to check mode.
    8. Check that the stop and start indicator flashes as shown in the illustration.
      Fig 1: Check Mode
      GTY701014Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    9. Start the engine.
    10. Check that the stop and start indicator turns off.
    11. Simulate the conditions of the malfunction described by the customer.
    12. Check for DTCs and freeze frame data using the GTS.
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.