Abnormality Judgment

Judge as NG when the malfunction criteria below are met.

Judgment Value

MALFUNCTION CRITERIA AND THRESHOLD VALUE REFERENCE

Malfunction Criteria	Threshold Value
Engine coolant temperature	< 20°C (68°F)
Timer for diagnosis after engine start	≥ Judgment value of timer after engine start

Timer for diagnosis after engine start

Timer stop at fuel cut.
During the driving conditions except a) above, timer count up as follows.

64 milliseconds + TWCNT milliseconds (the time of at 64 milliseconds)

TWCNT is defined as follows.

TWCNT = 0 (at idle switch ON)

TWCNT show on the following table at idle switch OFF.

TWCNT REFERENCE

Temperature °C (°F)	Vehicle speed km/h (MPH)
Temperature °C (°F)	0 (0)	8 (4.97)	16 (9.94)	24 (14.9)	32 (19.9)	40 (24.9)	48 (29.8)	56 (34.8)
-20 (-4)	0 milliseconds	37.2 milliseconds	74.3 milliseconds	111.4 milliseconds	126.7 milliseconds	141.9 milliseconds	163.6 milliseconds	185.3 milliseconds
-10 (14)	0 milliseconds	27.4 milliseconds	54.8 milliseconds	82.2 milliseconds	99.7 milliseconds	117.1 milliseconds	136.0 milliseconds	154.8 milliseconds
0 (32)	0 milliseconds	17.6 milliseconds	35.3 milliseconds	52.9 milliseconds	72.6 milliseconds	92.3 milliseconds	108.3 milliseconds	124.3 milliseconds
10 (50)	0 milliseconds	7.9 milliseconds	15.8 milliseconds	23.7 milliseconds	45.6 milliseconds	67.6 milliseconds	80.7 milliseconds	93.9 milliseconds
20 (68)	0 milliseconds	7.9 milliseconds	15.8 milliseconds	23.7 milliseconds	45.6 milliseconds	67.6 milliseconds	80.7 milliseconds	93.9 milliseconds

Judgment value of timer after engine starting

t = 429.5 - 28.605 x Ti

Ti: The lowest coolant temperature after engine start

Time Needed for Diagnosis: Undetermined (It changes by the lowest engine coolant temperature and engine conditions such as vehicle speed and engine coolant temperature.)

Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cycles.