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Check Mode Procedure

HINT:

Intelligent tester only:

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

NOTE: All the stored DTCs and freeze frame data are erased if: 1) the ECM (Included in HV control ECU) is changed 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 and make a note of any DTCs and freeze frame data.
  1. CHECK MODE PROCEDURE (Using an intelligent tester) 
    1. Check and ensure the following conditions:
      1. Battery positive voltage 11 V or more.
      2. Throttle valve fully closed.
      3. Transmission in the P or N position.
      4. A/C switched OFF.
    2. Turn the ignition switch off.
    3. Connect the intelligent tester to the DLC3.
      4. Fig 1: Connecting Intelligent Tester To DLC3
      G05202415Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    4. Turn the ignition switch to the ON position.
    5. Turn the tester ON.
    6. Enter the following menus: DIAGNOSIS / ENHANCED OBDII / CHECK MODE.
    7. Switch the ECM (Included in HV control ECU) from normal mode to check mode.
    8. Make sure the MIL flashes as shown in the illustration.
      9. Fig 2: Identifying MIL Flashes
      G04828037Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    9. Start the engine.
    10. Make sure that the MIL turns OFF.
    11. Simulate the conditions of the malfunction described by the customer.
    12. Check the DTCs and freeze frame data using the tester.
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