Automatic Transmission System Check Mode Procedure

Check mode has a higher sensitivity to malfunctions and can detect malfunctions that normal mode cannot detect. Check mode can also detect all the malfunctions that normal mode can detect. In check mode, DTCs are detected with 1 trip detection logic.

Make sure that the following conditions are met:

1. The battery positive voltage is 11 V or higher.
   

2. The throttle valve is fully closed.
   

3. The shift lever is in P or N.
   

4. The air conditioning is off.
   

Turn the engine switch off.

Connect the GTS to the DLC3.

Turn the engine switch on (IG).*1

Turn the GTS on.

Enter the following menus: Powertrain / ECT / Utility / Check Mode.

Change the TCM to check mode. Make sure the MIL flashes as shown in the illustration.

NOTICE:

All DTCs and freeze frame data will be cleared if: 1) the GTS is used to change the TCM from normal mode to check mode or vice versa; or 2) during check mode, the engine switch is turned from on (IG) to on (ACC) or off.

Before entering check mode, make a note of the DTCs and freeze frame data.

Start the engine. The MIL should turn off after the engine starts.

Enter the following menus: Powertrain / ECT / Data List / Check Mode.

Make sure the Data List item Check Mode is ON.

HINT:

If Check Mode is OFF, turn the engine switch off and perform the procedure from *1 again.

Perform Monitor Drive Pattern for the ECT test (Click here).
(Or, simulate the conditions of the malfunction described by the customer.)

After simulating the malfunction conditions, use the GTS to check the DTC and freeze frame data.