Mitsubishi 3000GT Service Manual page 147

MULTIPORT FUEL INJECTION - Troubleshooting
DTC No.
PO301 -
Cylinder-l - Cylinder-6 Misfire Detected
P O 3 0 6
Background
If a misfiring occurs while the engine is running, the engine speed suddenly changes.
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The engine control module checks for changes in the engine speed.
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Range of Check, Set Conditions
The number of misfires for every 200 r/min of the engine exceeds the specified number (single
cylinder).
The number of misfires for every 1,000 r/min of the engine exceeds the specified number (single
cylinder).
DTC No.
PO325 Knock Sensor 1 Circuit Malfunction
Background
The knock sensor converts the vibration of the cylinder block into a voltage and outputs
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it. If there is a malfunction of the knock sensor, the voltage output will not change.
The engine control module checks whether the voltage output changes.
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Range of Check
Ignition switch: ON
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Excluding 60 seconds after the ignition switch is turned to ON or immediately after the
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engine starts.
Engine speed is approx. 2,000 r/min or more.
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Set Conditions
The changes in the knock sensor output voltage (knock sensor peak voltage at each
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DTC No.
PO335 Crankshaft Position Sensor Circuit Malfunction
Background
When the engine is running, the crankshaft position sensor outputs a pulse signal.
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The engine control module checks whether the pulse signal is input while the engine is
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Range of Check
Engine is cranking.
Set Conditions
Sensor output voltage does not change for 4 seconds (no pulse signal input).
DTC No.
I
Background
When the engine is running, the camshaft position sensor outputs a pulse signal.
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The enaine control module checks whether the pulse signal is input.
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Range of Check
Ignition switch: ON
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Engine speed is approx. 50 r/min or more.
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Set Conditions
Sensor output voltage does not change for 4 seconds (no pulse signal input).
Title
Title
Title
Title
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Probable causes
Ignition system related part(s)
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failed.
Engine control module failed.
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Probable causes
Knock sensor failed.
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Open or shorted knock sensor
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circuit, or loose connector
Engine control module failed.
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Probable causes
Crankshaft position sensor
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failed.
Open or shorted crankshaft
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position sensor circuit, or loose
connector.
Engine control module failed.
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Probable causes
Camshaft position sensor failed.
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Open or shorted camshaft
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position sensor circuit, or loose
connector.
Engine control module failed.
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