P1134

DTC P1134 - A/F SENSOR MICRO-COMPUTER PROBLEM

OUTLINE OF DIAGNOSIS
- Detect the malfunction of IC communication.
- Judge NG when the communication to front oxygen (A/F) sensor control IC is unable.




COMPONENT DESCRIPTION




ENABLE CONDITION

GENERAL DRIVING CYCLE
Perform the diagnosis continuously in 140 seconds after starting the engine.

DIAGNOSTIC METHOD




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




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

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

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

FAIL SAFE
None

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