Without Scan Tool

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

DTC CHECK


1. Prepare the OBDII scan tool (complying with SAE J 1978) or LEXUS hand-held tester.
2. Connect the OBDII scan tool or LEXUS hand-held tester to DLC3 in the fuse box at the lower left of the instrument panel.
3. Turn the ignition switch ON and turn the OBDII scan tool or LEXUS hand-held tester switch ON.
4. Use the OBDII scan tool or LEXUS hand-held tester to check the DTCs and freezed frame data and note them down.

(For operating instructions, see the OBDII scan tool's instruction book.)


NOTICE:
- When simulating symptoms with an OBDII scan tool (excluding LEXUS hand-held tester) to check the DTCs, use normal mode.
- For codes on the DTCs chart subject to 2 trip detection logic", turn the ignition switch off after the symptoms have been simulated the first time.
- Then repeat the simulation process again.
- When the program has been simulated twice, the MIL lights up and the DTCs are recorded in the ECM.