With Manufacturer's Scan Tool

Check the DTC.

NOTE:
- If there is no DTC in the normal mode, check the 1st trip DTC using Continuous Test Results function (Mode 7 for SAE J1979) on the OBD II scan tool or the hand-held tester.
- Hand-held tester only:
When the diagnosis system is switched from the normal mode to the check mode, it erases all DTCs and freezed frame data recorded in the normal mode. So before switching modes, always check the DTCs and freezed frame data, and note them down.

1. Prepare the OBD II scan tool (complying with SAE J1978) or the hand-held tester.
2. Connect the OBD II scan tool or the hand-held tester to DLC3 at the lower left of the instrument panel.
3. Turn the ignition switch ON and push the OBD II scan tool or the hand-held tester switch ON.
4. Use the OBD II scan tool or the hand-held tester to check the DTCs and freezed frame data and note them down (For operating instructions, see the OBD II scan tool's instruction book.).

If there is no DTC in normal mode, check the 1st trip DTC using Continuous Test Results function (Mode 7 for SAE J1979) on the OBD II scan tool or TOYOTA hand-held tester.

5. See Trouble Code Descriptions to confirm the details of the DTCs.

NOTE:
- Turn the ignition switch OFF after the symptom is simulated the first time. Then repeat the simulation process again. When the problem has been simulated twice, the MIL lights up and the DTCs are recorded in the ECM.
- Check the 1st trip DTC using Mode 7 (Continuous Test Results) for SAE J1979.