DTC Check (Normal Mode)

DIAGNOSIS INSPECTION (Normal Mode)





MALFUNCTION INDICATOR LAMP (MIL) CHECK
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.

DIAGNOSTIC TROUBLE CODE (DTC) CHECK

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

1. Prepare the OBD II scan tool (complying with SAE J1978) or LEXUS hand-held tester.
2. Connect the OBD II scan tool or LEXUS hand-held tester to DLC3 at the lower center of the instrument panel.
3. Turn the ignition switch ON and push the OBD II scan tool or LEXUS hand-held tester switch ON.
4. Use the OBD II scan tool or LEXUS hand-held tester to check the DTC and freeze 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. Refer to Trouble Code Descriptions to confirm the details of the DTCs.

NOTE:
- When simulating symptoms with an OBD II scan tool (excluding LEXUS hand-held tester) to check the DTC, 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.