With Generic Scan Tool

Check the MIL.
1. The MIL comes on when the ignition switch is turned ON and the engine is not running.

HINT: If the MIL does not light up, troubleshoot the combination meter

2. When the engine started, the MIL should go off. If the lamp remains on, the diagnosis system has detected a malfunction or abnormality in the system.


Check the DTC.
1. Prepare the OBD II scan tool.





2. Connect the OBD II scan tool to DLC3 at the lower left of the instrument panel.
3. Turn the ignition switch ON and push the OBD II scan tool switch ON.
4. Use the OBD II scan tool to check the DTCs and freeze frame data and note them down. (For operating instructions, see the OBD II scan tool's instruction book.)
5. See Trouble Code Description to confirm the details of the DTCs.

NOTE:
When simulating symptoms with an OBD II scan tool (excluding TOYOTA hand-held tester) to check the DTCs, use normal mode. For code on the DTC chart subject to "2 trip detection logic", perform the following either action.

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.