How to Erase Emission-Related Diagnostic Information

HOW TO ERASE EMISSION-RELATED DIAGNOSTIC INFORMATION

How to Erase DTC and 1st Trip DTC

With SDT

NOTE:
- If the ignition switch stays ON after repair work, always turn ignition OFF once. Wait at least 10 seconds and then turn it ON (engine stopped) again.
- If the DTC is not for A/T related items (see [DTC Index: ECM]) DTC Index: ECM , skip step 1.

1. Erase DTC in TCM. Refer to [OBD-II Diagnostic Trouble Code (DTC)]. OBD-II Diagnostic Trouble Code (DTC)
2. Select "Engine / Powertrain" with SDT.
3. Select "DTC check".
4. Touch "Clear". (DTC in ECM will be erased.)

With GST

NOTE:
- If the ignition switch stays ON after repair work, always turn ignition switch OFF once. Wait at least 10 seconds and then turn it ON (engine stopped) again.
- If the DTC is not for A/T related items (see [DTC Index: ECM]) OBD-II Diagnostic Trouble Code (DTC) , skip step 1.

1. Erase DTC in TCM. Refer to [OBD-II Diagnostic Trouble Code (DTC)]. OBD-II Diagnostic Trouble Code (DTC) (The DTC in TCM will be erased)
2. Select Service $04 with GST (Generic Scan Tool).

No Tools

NOTE:
- If the ignition switch stays ON after repair work, always turn ignition switch OFF once. Wait at least 10 seconds and then turn it ON (engine stopped) again.
- If the DTC is not for A/T related items (see [DTC Index: ECM]) DTC Index: ECM , skip step 1.

1. Erase DTC in ECM. Refer to HOW TO ERASE DIAGNOSTIC TEST MODE II (SELF-DIAGNOSTIC RESULTS).
2. Change the diagnostic test mode from Mode II to Mode I by depressing the accelerator pedal.
- If the battery is disconnected, the emission-related diagnostic information will be lost within 24 hours.
- The following data are cleared when the ECM memory is erased.
- Diagnostic trouble codes
- 1st trip diagnostic trouble codes
- Freeze frame data
- 1st trip freeze frame data
- System readiness test (SRT) codes
- Test values

Actual work procedures are explained using a DTC as an example. Be careful so that not only the DTC, but all of the data listed above, are cleared from the ECM memory during work procedures.