Check Mode Procedure

3MZ-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: CHECK MODE PROCEDURE

CHECK MODE PROCEDURE
HINT: Compared to 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 the hybrid vehicle control ECU) is changed from normal mode to check mode or vice versa: or 2) the power switch on (IG) 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
(a) Check and ensure the following conditions:
(1) Battery positive voltage 11 V or more.
(2) Transmission in the P position.
(3) A/C switched OFF.
(b) Turn the power switch off.
(c) Connect the Techstream to the DLC3.
(d) Turn the power switch on (READY).
(e) Turn the Techstream on.
(f) Enter the following menus: Powertrain / Engine and ECT / Utility / Check Mode.
(g) Switch the ECM (included in the hybrid vehicle control ECU) from normal mode to check mode.






(h) Make sure that the MIL flashes as shown in the illustration.

(i) Turn the power switch on (READY).
(j) Make sure that the MIL turns OFF.
(k) Simulate the conditions of the malfunction described by the customer.
(l) Check the DTCs and freeze frame data using the Techstream.