DTC P0230 FUEL PUMP PRIMARY CIRCUIT
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DTC P0230 FUEL PUMP PRIMARY CIRCUIT
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Detect the malfunction of fuel pump control
unit. Judge NG when the NG signal is sent through a diagnostic line
coming from the fuel pump control unit. Fuel pump control unit detects
the open or short circuit malfunction for each line, and then sends
NG signals if one of them is found NG.
(1)
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Engine
control module (ECM)
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(2)
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Fuel pump
control unit
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(3)
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Fuel pump
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(4)
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Battery
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Secondary
Parameters
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Enable
Conditions
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None
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Always perform the diagnosis continuously.
Abnormality Judgment
Judge NG when the continuous time of completing
the malfunction criteria below becomes more than 2.5 seconds.
Judgment
Value
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Malfunction
Criteria
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Threshold
Value
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Battery
voltage
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≥ 8
V
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After
engine starting
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1
seconds or more
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Fuel
pump control
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ON
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Fuel
pump control unit output diagnosis signal
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Low
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Fuel level
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≥ 10
L (2.6 US gal, 2.2 Imp gal)
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Time Needed for Diagnosis:
2.5
seconds
Malfunction Indicator
Light Illumination:
Illuminates when malfunction occurs in
2 continuous driving cycles.
Normality Judgment
Judge OK and clear the NG when the malfunction
criteria below are completed.
Judgment
Value
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Malfunction
Criteria
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Threshold
Value
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Battery
voltage
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≥ 8
V
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After
engine starting
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1
seconds or more
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Fuel
pump control
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ON
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Fuel
pump control unit output diagnosis signal
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High
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Fuel level
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≥ 10
L (2.6 US gal, 2.2 Imp gal)
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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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OFF setting may be needed depending on the
NG portion.
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ECM OPERATING
AT DTC SETTING
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Memorize the freeze frame data. (For test
mode $02)
