DTC P0851 NEUTRAL SWITCH INPUT CIRCUIT LOW (MT MODEL)
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DTC P0851 NEUTRAL SWITCH INPUT CIRCUIT LOW
(MT MODEL)
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Judge the open or short circuit of the neutral
SW.
Judge NG when there is no change in the neutral
SW even if the driving shift was applied. (There is neutral SW ON/OFF
inversion from the vehicle speed and engine speed.)
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Secondary
Parameters
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Enable
Conditions
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Ignition
switch
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ON
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Battery
voltage
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≥ 10.9
V
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After
starting the engine
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2
seconds or more
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Starter
switch
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OFF
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Perform the diagnosis continuously in 2 seconds
or more after starting the engine.
Judge NG when the malfunction criteria below
are completed 3 time or more after the neutral SW change. And clear
NG if there is change in the neutral SW.
Judgment
Value
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Malfunction
Criteria
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Threshold
Value
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Neutral
switch signal (while changing from a to b below)
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Low
(ON) continues
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Driving
condition change
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a)
to b)
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a)
Vehicle speed = 0 km/h (0 MPH) & engine
speed 600 — 900 rpm
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b) Vehicle
speed ≥ 64 km/h (40 MPH) & engine speed
1,600 — 2,550 rpm
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Time Needed for Diagnosis:
3
monitoring
Malfunction Indicator
Light Illumination:
Illuminates when malfunction occurs in
2 continuous driving cycles.
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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)
