P2431

DTC P2431 SECONDARY AIR INJECTION SYSTEM AIR FLOW / PRESSURE SENSOR CIRCUIT RANGE / PERFORMANCE

1. OUTLINE OF DIAGNOSIS
Detect the malfunction of secondary air pressure sensor output property.
Judge NG when the secondary air pressure sensor output is largely different from the intake manifold pressure at engine starting.




2. ENABLE CONDITION

3. GENERAL DRIVING CYCLE
Perform the diagnosis with ignition switch ON.

4. DIAGNOSTIC METHOD




^ Abnormality Judgment
Judge NG when the continuous time of completing the malfunction criteria below becomes more than 0.3 seconds.




^ Normality Judgment
Judge OK and clear the NG when the continuous time of completing the malfunction criteria below becomes more than 0.26 seconds.

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

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

7. FAIL SAFE
None

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