Diagnosis Inspection (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.
- 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.

Diagnostic Trouble Code (DTC) Check

NOTE: When the diagnosis system is switched from normal mode to check mode (Toyota hand-held tester only), it erases all DTC and freezed frame data recorded in normal mode. So before switching modes, always check the DTC and freezed frame data, and note them down.

1. Prepare the OBD II scan tool (complying with SAE J1978) or Toyota hand-held tester



2. Connect the OBD II scan tool or Toyota 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 OBD II scan tool or Toyota hand-held tester switch ON.
4. Use the OBD II scan tool or Toyota hand-held tester to check the DTC and freezed frame data, note them down.
5. See "Trouble Code Descriptions" to confirm the details of the DTC.

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