On-Board Diagnostics
- After the ECU first detects a malfunction, a diagnostic trouble code is recorded when the engine is restarted and the same malfunction is re-detected. (Malfunction is detected in driving cycle). However, for fuel system rich/lean misfiring, a diagnostic trouble code is recorded on the first detection of the malfunction.
- The diagnostic trouble codes in ECU memory will be erased when removing the battery terminal from the battery or using scan tool. However, for fuel system rich/lean misfiring, a diagnostic trouble code is recorded on the first detection of the malfunction.
- When driving conditions (engine speed, engine coolant temperature, etc.) are similar to those when the malfunction was first recorded.
- When the ECU does not re-detect the malfunction for 80 driving cycles.
NOTE:
A "driving cycle" consists of the engine and start, vehicle operation beyond the beginning of closed loop operation.