Mitsubishi 3000GT Service Manual page 150

MULTIPORT FUEL INJECTION - Troubleshooting
DTC No.
PO51 0 Closed Throttle Position Switch Malfunction
Background
While the engine is idling without pressing the accelerator pedal, "ON" signal can be input
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from the closed throttle position switch to the engine control module.
The engine control module is used for checking the input signal during the engine idling.
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Range of Check
The vehicle is under stopping, however, the vehicle should have been driven at speed
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on or over 30 km/h at least one time before the vehicle is stopped.
The engine speed is approx. 800 r/min or below.
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Set Conditions
"OFF" signal was input from the closed throttle position switch for 2 seconds.
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DTC No. 1
Transmission Range Sensor Circuit Malfunction
PO705
(RPNDL Input)
Background
When a malfunction of the park/neutral position switch is detected, the transaxle control
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module outputs a malfunction signal to the engine control module.
Range of Check, Set Conditions
The park/neutral position switch failure signal is input to the engine control module.
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DTC No.
Transmission Fluid Temperature Sensor Circuit
PO71 0
Malfunction
Background
When a malfunction of the fluid temperature sensor is detected, the transaxle control module
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outputs a malfunction signal to the engine control module.
Range of Check, Set Conditions
The fluid temperature sensor failure signal is input to the engine control module.
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DTC No.
Turbocharger Waste Gate Actuator Malfunction
Background
The engine control module always monitors the intake air amount to check if the engine
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is in overboosted condition.
When the engine control module judges that the engine is in an overboosted condition,
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it cuts off the fuel supply to protect the engine.
Range of Check, Set Conditions
A condition where the fuel supply is to be shut off is detected.
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Title
Title
Title
Title
Probable causes
Closed throttle position switch
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failed.
Open or shorted closed throttle
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position switch circuit, or loose
connector.
Engine control module failed.
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Probable causes
Park/neutral position switch
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failed.
Open or shorted park/neutral
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position switch circuit, or loose
connector.
Engine control module failed.
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Probable causes
Oil temperature sensor failed.
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Open or shorted temperature
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sensor circuit, or loose connec-
tor.
Engine control module failed.
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Probable causes
Turbocharger waste gate actua-
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tor failed.
Boost pressure control system
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failed.
Engine control module failed.
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