P1410
DTC P1410 SECONDARY AIR INJECTION SYSTEM SWITCHING VALVE STUCK OPEN1. OUTLINE OF DIAGNOSIS
Continually detects for a combination solenoid valve and lead valve stuck open condition.
Calculate the integrated value of secondary air supply piping pressure sensor output voltage maximum/minimum values and output voltage deviation for a constant time period after engine start, and if the difference between the maximum/minimum is large and the integrated value is also large, judge as NG.
2. ENABLE CONDITION
Enable Conditions:
3. GENERAL DRIVING CYCLE
Perform diagnosis continuously after engine start with the secondary air pump stopped and with a high air flow amount.
4. DIAGNOSTIC METHOD
When the solenoid and lead valves of the combination valve both are open and malfunctioning, a pulse will appear in the secondary air supply piping pressure sensor output. This pulse is tracked by the following method to detect the problem.
Calculate the maximum and minimum values of the secondary air supply piping pressure sensor output voltage, and integrated value (sum) of the output voltage deviation for kCOTIM seconds. The difference between the maximum/minimum values is compared with the threshold value, and the sum is also compared with the threshold value. If both exceed the threshold, the NG counter is counted up, and when the counter becomes kCOCOT times, an NG judgment is made. If neither exceed the threshold, or only one exceeds the threshold, it is judged as being normal.
Time Needed for Diagnosis: 10 seconds • 2 time
Malfunction Indicator Light Illumination: Illuminates as soon as a malfunction occurs.
5. DTC CLEAR CONDITION
- When the OK idling cycle is completed 40 times in a row
- When "Clear Memory" is performed
6. MALFUNCTION INDICATOR LIGHT CLEAR CONDITION
- When the OK driving cycle is completed 3 times in a row
- When "Clear Memory" is performed
7. FAIL SAFE
None
8. ECM OPERATION AT DTC SETTING
Memorize the freeze frame data. (For test mode $02)