Mitsubishi Car 1999-05

3.0L V6 VIN J Std 2

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Trouble Code: P0500



Vehicle Speed Sensor Circuit Malfunction

Possible Causes:



VSS signal circuit is open or shorted to ground
 
VSS power circuit is open (check for power from MFI relay)
 
VSS ground circuit is open between sensor and chassis ground
 
VSS is damaged or has failed
 
PCM has failed (the PCM provides 5v on the VSS signal circuit)
 

Trouble Code: P0505



Idle Speed Control System Malfunction

Possible Causes:



Stepper motor Coil A1 or A2 circuit is open or shorted to ground
 
Stepper motor Coil B1 or B2 circuit is open or shorted to ground
 
Stepper motor coil circuit(s) shorted to system power (B+)
 
Stepper motor power circuit is open (check power at MFI relay)
 
Stepper motor is damaged or has failed
 
PCM has failed
 

Trouble Code: P0510



Closed Throttle Position Switch Circuit Malfunction

Possible Causes:



Closed throttle position switch signal circuit is open or grounded
 
Closed throttle position switch signal circuit is shorted to power
 
Closed throttle position switch or TP sensor damaged or failed
 
PCM has failed
 

Trouble Code: P0551



Power Steering Pressure Switch Circuit Malfunction

Possible Causes:



Power steering pressure switch signal circuit is open
 
Power steering pressure switch signal circuit shorted to ground
 
Power steering pressure switch is damaged or has failed
 
PCM has failed
 

Trouble Code: P1400



Manifold Differential Pressure Sensor Circuit Malfunction

Possible Causes:



MDP sensor signal circuit is open or shorted to ground
 
MDP sensor signal circuit is shorted to VREF or system power
 
MDP sensor is damaged or has failed
 
PCM has failed
 

 
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