Check Mode Procedure

HINT:

Techstream 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 is changed from normal mode to check mode or vice versa; or 2) the ignition switch is turned from ON to ON (ACC) or off while in check mode. Before changing modes, always check and note any DTCs and freeze frame data.

CHECK MODE PROCEDURE (Using Techstream)
1. Check and ensure the following conditions:
  1. Battery positive voltage 11 V or more.
  2. Throttle valve is fully closed.
  3. Shift lever is in P or N.
  4. A/C switch is off.
2. Turn the ignition switch off.
3. Connect Techstream to the DLC3.
4. Turn the ignition switch to ON.
5. Turn the Techstream on.
6. Enter the following menus: Powertrain / Engine / Utility / Check Mode.
7. Switch the ECM from normal mode to check mode.
8. Check that the MIL flashes as shown in the illustration.
  
  Fig 1: Identifying MIL Flash Pattern
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
9. Start the engine.
10. Check that the MIL turns off.
11. Simulate the conditions of the malfunction described by the customer.
12. Check for DTCs and freeze frame data using the Techstream.