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Typical Malfunction Thresholds

WARNING: This page is about a different car, the 2004 Toyota Corolla. However, it is still accessible from the selected car via links, so may be relevant.
TYPICAL MALFUNCTION THRESHOLDS

Detection Criteria Threshold
P0505 Functional check: 
Following conditions are met (At idle (after running with more than 6.2 mph (10 km/h) per trip) Case 1: A and B (5 times)
Case2: B (5 seconds)
A. Either of the following conditions is met: 1 or 2
1. Deviation of engine speed (When shift position N or A/C ON) Less than - 100 rpm or more than 200 rpm
2. Deviation of engine speed (When shift position D or A/C OFF) Less than - 100 rpm or more than 150 rpm
B. Either of the following condition is met: 1 or 2
1. IAC flow rate learning value (A/C OFF) 0.5 L/sec or less or 2.75 L/sec or more
2. IAC flow rate learning value (A/C ON) 0.22 L/sec or less or 0.98 L/sec or more
P0505 Range check: 
Number of missing output voltage change 2,000 times or more
P0511: 
Number of missing output voltage change 1,000 times or more