DTC P1312 EXHAUST GAS TEMPERATURE SENSOR MALFUNCTION
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|
DTC P1312 EXHAUST GAS TEMPERATURE SENSOR
MALFUNCTION
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Detect the malfunction of exhaust temperature
sensor output property.
Judge NG when the exhaust temperature remains
high or low whereas it seemed to vary from the viewpoint of driving
condition.
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Secondary
Parameters
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Enable
Conditions
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After
engine starting
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240
seconds or more
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Engine
coolant temperature at engine start
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≤ 40°C
(104°F)
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Engine
coolant temperature
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≥ 75°C
(167°F)
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Intake
air temperature at engine start
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≥ 0°C
(32°F)
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Estimate
ambient temperature
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≥ 0°C
(32°F)
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Vehicle
speed
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≥ 65
km/h (40 MPH)
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Engine
speed
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≥ 2,400
rpm
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Engine
load
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≥ 0.85
g/rev
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Lambda
value
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0.75 ←→ 1.25
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Perform the diagnosis continuously at more
than 65 km/h (40 MPH) in 240 seconds and more after starting the
engine in cool condition.
Pay attention to the coolant temperature
at engine starting.
Judge NG when one of the malfunction criteria
below is completed, and judge OK and clear the NG when all of the
malfunction criteria below are not completed.
Judgment
Value
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Malfunction
Criteria
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Threshold
Value
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Min.
exhaust temperature from engine starting
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≥ 700°C
(1,292°F)
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Max. exhaust
temperature from engine starting
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< 500°C
(932°F)
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Time Needed for Diagnosis:
0
seconds
Malfunction Indicator
Light Illumination:
Illuminates as soon as malfunction occurs.
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•
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When the OK idling cycle was completed 40 times
in a row
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•
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When “Clear Memory” was
performed
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MALFUNCTION
INDICATOR LIGHT CLEAR CONDITION
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•
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When the OK driving cycle was completed 3 times
in a row
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•
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When “Clear Memory” was
performed
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None
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ECM OPERATION
AT DTC SETTING
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Memorize the freeze frame data. (For test
mode $02)
