P2097
DTC P2097 POST CATALYST FUEL TRIM SYSTEM TOO RICH BANK 11. OUTLINE OF DIAGNOSIS
Detect abnormalities in the fuel system by determining whether the sub feedback compensation amount is shifting to rich or lean. If the sub feedback compensation amount from engine start to ignition off is shifting to rich or lean, there is insufficient compensation. --> If it is insufficient, change the sub feedback compensation guard value, shift judgement line, and increment the guard operation counter (temporary NG counter). When the guard operation counter (temporary NG counter) exceeds the set value, and the sub feedback compensation is shifting to rich or lean, it is judged as NG.
2. COMPONENT DESCRIPTION
3. ENABLE CONDITION
4. GENERAL DRIVING CYCLE
Perform the diagnosis continuously at a constant speed of approx. 75 km/h (47 MPH) or higher.
5. DIAGNOSTIC METHOD
Judge as NG when the continuous time when the following conditions are established is more than 5 seconds. Judge as OK and clear the NG when the following conditions are not established for a continuous time of 5 seconds or more.
6. DTC CLEAR CONDITION
- When the OK idling cycle is completed 40 times in a row
- When "Clear Memory" is performed
7. MALFUNCTION INDICATOR LIGHT CLEAR CONDITION
- When similar driving conditions are repeated 3 times and the result is OK.
- When "Clear Memory" is performed
8. FAIL SAFE
None
9. ECM OPERATION AT DTC SETTING
Memorize the freeze frame data. (For test mode $02)