Diagnostic Method

• Exhaust gas temperature diagnosis 

Abnormality Judgement 

Calculate the estimated exhaust gas temperature when the diagnostic enable condition is established. Judge as NG when the following conditions are established after engine starting within the predetermined time.

Judgement Value 

Malfunction Criteria	Threshold Value
Estimated exhaust gas temperature	< Value from Map

Map 

Coolant temperature after starting the engine	-40 °C (-40 °F)	-30 °C (-22 °F)	-20 °C (-4°F)	-10°C (14 °F)	0°C (32 °F)	10 °C (50 °F)	20 °C (68 °F)	30 °C (86 °F)	40 °C (104 °F)	45 °C (113 °F)
Threshold Value	200 °C (392 °F)	200 °C (392 °F)	200 °C (392 °F)	200 °C (392 °F)	95 °C (203 °F)	95 °C (203 °F)	89 °C (192.2 °F)	83 °C	79 °C (174.2 °F)	79 °C (174.2 °F)

Time Needed for Diagnosis:  14 seconds

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

Normality Judgement 

Judge as OK and clear the NG if the following conditions are established.

Judgement Value 

Malfunction Criteria	Threshold Value
Estimated exhaust gas temperature	≥ Value from Map

Time Needed for Diagnosis:  Less than 1 second

• Idle speed diagnosis 

Abnormality Judgement 

Judge as NG when the following conditions are established after the predetermined time.

Judgement Value 

Malfunction Criteria	Threshold Value
Continuous time of (Target engine speed - Actual engine speed -100 RPM)	≥ 6000 ms
Continuous time of (actual retard amount 30 °CA)	≥ 0 ms

Time Needed for Diagnosis:  14 seconds

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

Normality Judgement 

Judge as OK and clear the NG if the following conditions are established.

Judgement Value 

Malfunction Criteria	Threshold Value
Continuous time of (Target engine speed - Actual engine speed -100 RPM)	< 6000 ms
Continuous time of (actual retard amount 30 °CA)	< 0 ms

Time Needed for Diagnosis:  Less than 1 second