MULTIPORT FUEL INJECTION Troubleshooting
DTC No.
Title
Probable causes
PO440
Evaporative Emission Control System Malfunction
Background
The evaporative emission purge solenoid opens and closes while the engine is idling.
Then the fuel compensation value change according to whether the evaporative emission
canister emits purge air or not.
l
The engine control module checks for this changes.
Range of Check, Set Conditions
When the evaporative emission purge solenoid opens and closes while the engine is idling the
changes in the fuel compensation value is lower than the specified amounts.
l
Evaporative emission purge
solenoid failed.
l
Open or shorted evaporative
emission purge solenoid circuit,
or loose connector.
l
Purge hose connection or
routing is defective.
l
Engine control module failed.
DTC No.
Title
Evaporative Emission Control System Purge Control
Probable causes
PO443
Valve Circuit Malfunction
I
Background
The engine control module checks whether current flows in the evaporative emission purge
l
Evaporative emission purge
solenoid failed.
solenoid drive circuit when the solenoid is driven.
l
Open or shorted evaporative
Range of Check, Set Conditions
emission purge solenoid circuit,
Even though the evaporative emission purge solenoid has switched from OFF to ON, current
or loose connector.
does not flow to the coil for 4 seconds.
l
Engine control module failed.
DTC No.
Title
PO500
Vehicle Speed Sensor Malfunction
Background
l
The vehicle speed sensor outputs a pulse signal while the vehicle is driven.
l
The engine control module checks whether the pulse signal is output.
Range of Check
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Ignition switch: ON
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Excluding 60 seconds after the ignition switch is turned to ON or immediately after the
engine starts.
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Closed throttle position switch: OFF
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Engine speed is 3,000
or more.
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Driving under high engine load conditions.
Set Conditions
Sensor output voltage does not change for 4 seconds (no pulse signal input).
Probable causes
l
Vehicle speed sensor failed.
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Open or shorted vehicle speed
sensor circuit, or loose connec-
tor.
l
Engine control module failed.
DTC No.
Title
Probable causes
PO505
Idle Control System Malfunction
Background
l
Idle air control motor failed.
l
If there is a malfunction of the IAC system, the actual engine speed will not be identical
l
Open or shorted idle air control
to the target engine speed.
motor circuit, or loose connector.
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The engine control module checks the difference between the actual engine speed and
l
Engine control module failed.
the target engine speed.
Range of Check, Set Conditions
After the engine has warmed up, the difference between the actual engine speed and the target
engine speed exceeds the specified value.
TSB Revision
Summary of Contents for 1992 3000GT
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Page 118: ...13A 14 MULTIPORT FUEL INJECTION Special Tools TSB Revision...
Page 394: ...NOTES...
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Page 532: ...NOTES...
Page 536: ...21 4 CLUTCH Troubleshooting Excessive wear of clutch disc facin I LJ 1 TSB Revision...
Page 556: ...NOTES...
Page 570: ...22 14 MANUAL TRANSAXLE AWD Special Tools SPECIAL TOOLS Oil seal installer TSB Revision...
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Page 609: ...AUTOMATIC TRANSAXLE Troubleshooting 23 I 9 L L 1 TSB Revision...
Page 668: ...NOTES...
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Page 752: ...33 2 NOTES...
Page 766: ...NOTES...
Page 809: ...REAR SUSPENSION AWD Special Tools 34 23 B lMB990244 i TSB Revision...
Page 810: ...34 24 REAR SUSPENSION AWD Troubleshooting TROUBLESHOOTING TSB Revision...
Page 946: ...NOTES...
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Page 964: ...37A 4 STEERING Snecial Tools SPECIAL TOOLS Preload socket General service TSB Revision...
Page 994: ...NOTES...
Page 1006: ...NOTES...
Page 1068: ...42 62 BODY Sunroof SUNROOF SWITCH CONTINUITY CHECK 18FO403 TSB Revision...
Page 1070: ...NOTES I...
Page 1103: ...52 1 i INTERIOR CONTENTS INTERIOR 52A SUPPLEMENTAL RESTRAINT SYSTEM SRS 528 i...
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