MULTIPORT FUEL INJECTION Troubleshooting
DTC No.
Title
PO301
Probable causes
P O 3 0 6
Cylinder-l
Cylinder-6 Misfire Detected
Background
l
Ignition system related part(s)
l
If a misfiring occurs while the engine is running, the engine speed suddenly changes.
failed.
l
The engine control module checks for changes in the engine speed.
l
Engine control module failed.
Range of Check, Set Conditions
The number of misfires for every 200
of the engine exceeds the specified number (single
cylinder).
The number of misfires for every 1,000
of the engine exceeds the specified number (single
cylinder).
DTC No.
Title
PO325
Knock Sensor 1 Circuit Malfunction
Background
l
The knock sensor converts the vibration of the cylinder block into a voltage and outputs
it. If there is a malfunction of the knock sensor, the voltage output will not change.
l
The engine control module checks whether the voltage output changes.
Range of Check
l
Ignition switch: ON
l
Excluding 60 seconds after the ignition switch is turned to ON or immediately after the
engine starts.
l
Engine speed is approx. 2,000
or more.
Set Conditions
l
The changes in the knock sensor output voltage (knock sensor peak voltage at each
revolution of the crankshaft) is less than 0.06 V for 200 times in succession.
Probable causes
l
Knock sensor failed.
l
Open or shorted knock sensor
circuit, or loose connector
l
Engine control module failed.
DTC No.
Title
Probable causes
PO335
Crankshaft Position Sensor Circuit Malfunction
Background
l
Crankshaft position sensor
l
When the engine is running, the crankshaft position sensor outputs a pulse signal.
failed.
l
The engine control module checks whether the pulse signal is input while the engine is
l
Open or shorted crankshaft
position sensor circuit, or loose
Range of Check
Engine is cranking.
Set Conditions
connector.
l
Engine control module failed.
Sensor output voltage does not change for 4 seconds (no pulse signal input).
DTC No.
Title
Probable causes
PO340 /Camshaft Position Sensor Circuit Malfunction
I
Background
l
When the engine is running, the camshaft position sensor outputs a pulse signal.
l
The enaine control module checks whether the pulse signal is input.
Range of Check
l
Ignition switch: ON
l
Engine speed is approx. 50
or more.
l
Camshaft position sensor failed.
l
Open or shorted camshaft
position sensor circuit, or loose
connector.
l
Engine control module failed.
Set Conditions
Sensor output voltage does not change for 4 seconds (no pulse signal input).
TSB Revision
Содержание 1992 3000GT
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