Electronic Tranmissions and Scan Tools

Vehicle: Mitsubishi Galant

Year: 1996

Engine Size: 2.0

Abbreviations

• PCM - Powertrain Control Module
  


• TCC - Torque Converter Clutch


• TPS - Throttle Position Sensor
  


• ECT - Engine Coolant Temperature


• VSS - Vehicle Speed Sensor
  


• PSA - Transmission Range Fluid Pressure Switch Assembly


• TTS - Transmission Temperature Sensor

Block Diagram

Sensors:

Air Charge Temperature
Air Conditioning Clutch
Brake On/Off Switch
Profile Ignition Pickup
Coolant Temperature Sensor
Mass Air Flow Sensor
Manual Lever Position Sensor
Output Shaft Speed Sensor
Transmission Oil Temperature Sensor
Throttle Position Sensor
Vehicle Speed Sensor

PCM

Electronic Pressure Control Solenoid
Modulated Converter Clutch Control Solenoid
Shift Solenoid SS1
Shift Solenoid SS2
Self Test

Wiring Diagram

Shift Chart



Shift Solenoids

Which solenoids are "on" when this vehicle is shifted into Drive and starts out in first gear?

1-2 / 2-3

Which solenoids are "on" when this vehicle automatically shifts into second gear?

-- / 2-3

Which solenoids are "on" when this vehicle automatically shifts into third gear?

-- / --

Which solenoids are "on" when this vehicle automatically shifts into fourth gear?

1-2 / --

Shift Solenoid Malfunction: Describe what would happen if none of the solenoids came "ON". Could the vehicle drive? What gear would it be in? How fast could the vehicle go? Could it have the Power to climb a hill?

Yes the car would drive but would be stuck in third gear, the vehicle would accelerate very slowly until it reached the appropriate speed for that gear, and so would not have the low-down power required to climb a hill.

Codes: Pick two transmission codes out of repair information, and describe what the code means and what malfunction would cause the code:

Code: LR Solenoid Valve Open
This is because the transmission cable is unplugged and is not powering the shift solenoids so therefore the solenoid is stuck open

Code: UD Solenoid Valve Open
This is because the transmission cable is unplugged and is not powering the shift solenoids so therefore the solenoid is stuck open as with the above error code.

Diagnosis

For each code listed above, discuss what tests you culd run to diagnose the problem:

1st Problem Testing: Tried shifting by sticking in drive or using the tip-tronic shift but the vehicle stayed in third gear with the transmission cable still unplugged.

2nd Problem Testing: Connections needed to be checked, obviously it was the transmission cable being unplugged that was creating the fault so with the cable re-connected the car began shifting gears like normal.