P1134

DTC P1134 - A/F SENSOR MICRO-COMPUTER PROBLEM

OUTLINE OF DIAGNOSIS
Detect the malfunction of IC communication.
Judge NG when the IC communication malfunction occurs.




COMPONENT DESCRIPTION




ENABLE CONDITION

GENERAL DRIVING CYCLE
Always perform the diagnosis continuously.

DIAGNOSTIC METHOD




- Abnormality Judgment
Judge NG when the malfunction criteria are completed.




- Normality Judgment
Judge OK when the malfunction criteria are completed.

DTC CLEAR CONDITION
- When the OK idling cycle was completed 40 times in a row
- When " Clear Memory " was performed

MALFUNCTION INDICATOR LIGHT CLEAR CONDITION
- When the OK driving cycle was completed 3 times in a row
- When " Clear Memory " was performed

FAIL SAFE
- A/F IC communication: Not allowed to communicate.
- A/F main learning compensation: Not allowed to calculate.
- Compensation at high temperature restart: Set min. value 0.06 -> 0.
- Purge control: Not allowed to purge.

ECM OPERATION AT DTC SETTING
Memorize the freeze frame data. (For test mode $02)