3. GENERAL DRIVING CYCLE
Perform continuous diagnosis when air flow amount is large during the secondary air pump stop after engine start.
4. DIAGNOSTIC METHOD
When both combination valve electromagnetic valve and the reed valve are open failure, the failure appears as pulses in the secondary air
delivery pipe pressure sensor output. Detect abnormality by capturing these pulses using the following method.
Abnormality Judgment
Calculate Max./Min. value of the secondary air delivery pipe pressure sensor output voltage and the sum of the output voltage deviation for
the given time. Compare the difference between Max. and Min. values with threshold value and also compare the sum value with the
threshold value. If both values exceed the threshold value, count up NG counter and then judge as NG if the counter reaches the given times.
Time Needed for Diagnosis: 2000 ms x 20 time(s)
Malfunction Indicator Light Illumination: Illuminates as soon as a malfunction occurs.
Normality Judgment
Judge as OK and clear NG if neither exceeds the threshold value, or if either of the two exceeds the threshold value.
Time Needed for Diagnosis: 2000 ms
P1418
DTC P1418 SECONDARY AIR INJECTION SYSTEM CONTROL "A" CIRCUIT SHORTED
1. OUTLINE OF DIAGNOSIS
Judge as NG when the ECM output level differs from the actual terminal level.
2. ENABLE CONDITION
3. GENERAL DRIVING CYCLE
Always perform the diagnosis continuously.
4. DIAGNOSTIC METHOD
Abnormality Judgment
If the duration of time while the following conditions are met is longer than the time indicated, judge as NG.
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