P0030

DTC P0030 - HO2S HEATER CONTROL CIRCUIT (BANK 1 SENSOR 1)

OUTLINE OF DIAGNOSIS
Detect the malfunction of front oxygen (A/F) sensor heater.
Diagnosis is performed using A/F microcomputer, and communication is established between A/F microcomputer and main microcomputer. Judge NG when the data of heater malfunction NG is transmitted.
Judge NG when the front oxygen (A/F) sensor element impedance is out of the standard value.




COMPONENT DESCRIPTION




ENABLE CONDITIONS

GENERAL DRIVING CYCLE
Perform the diagnosis continuously in 30 seconds after the heater continuity starting, and complete the diagnosis if making a NG judgment.

DIAGNOSTIC METHOD




- Abnormality Judgment
Judge NG when one of the malfunction criteria is completed.




- Normality Judgment
Judge OK when all of the malfunction criteria is 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
None

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