P2097
DTC P2097 POST CATALYST FUEL TRIM SYSTEM TOO RICH BANK 11. OUTLINE OF DIAGNOSIS
Detect the malfunction of fuel system from the amount of sub feedback control, if it is shifted to rich or lean.
If the sub feedback amount from the engine started till ignition switch OFF is shifted to rich or lean, judge as insufficient sub feedback amount.
If insufficient, change the sub feedback amount guard value and shift judge line, and increment the guard operation counter (tentative NG counter).
Judge NG when the guard operation counter (tentative NG counter) exceeds the specified value and sub feedback amount is shifted to rich or lean.
2. COMPONENT DESCRIPTION
3. ENABLE CONDITION
4. GENERAL DRIVING CYCLE
Perform the diagnosis continuously at a constant speed at more than approx. 75 km/h (47 MPH).
5. DIAGNOSTIC METHOD
Judge NG when the continuous time of completing the malfunction criteria below becomes more than 5 seconds.
Judge OK and clear NG when the continuous time of completing the malfunction criteria below becomes more than 5 seconds.
6. DTC CLEAR CONDITION
^ When the OK idling cycle was completed 40 times in a row
^ When "Clear Memory" was performed
7. MALFUNCTION INDICATOR LIGHT CLEAR CONDITION
^ When OK with similar drive in 3 drive cycles.
^ When "Clear Memory" was performed
8. FAIL SAFE
None
9. ECM OPERATION AT DTC SETTING
Memorize the freeze frame data. (For test mode $02)