Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSDODGE1993COLT L4-1468CC 1.5L SOHCREPAIR AND DIAGNOSISTRANSMISSION AND DRIVETRAINAUTOMATIC TRANSMISSION/TRANSAXLERELAYS AND MODULES - A/TCONTROL MODULEDESCRIPTION AND OPERATION
1993 Dodge Colt L4-1468cc 1.5L SOHC
Control Module: Description and Operation
1993 Dodge Colt L4-1468cc 1.5L SOHCSECTION Description and Operation
PURPOSE
The Transmission Control Module (TCM) calculates transmission speed and gear ratio based upon input signals from Pulse Generators A and B. The TCM controls the torque converter damper clutch based on the input operating conditions.
OPERATION
To prevent driveability problems, the Transmission Control Module turns the damper clutch OFF under the following conditions:
- First and reverse gears- To secure quick acceleration at start
- Below approximately 800 RPM- To secure easy start
- Large throttle opening at engine speeds of 2,000 RPM or less- To secure quick acceleration
- Engine braking- To prevent deceleration shock
- 3-2 downshift- To secure shift feeling
- Engine coolant temperature below 122°F (50°C)
If all operating conditions are correct, the TCM switches a signal ON to the Damper Clutch Control Solenoid Valve to engage the torque converter clutch.
The Transmission Control Module (TCM) calculates transmission speed and gear ratio based upon input signals from Pulse Generators A and B. The TCM controls the torque converter damper clutch based on the input operating conditions.
OPERATION
To prevent driveability problems, the Transmission Control Module turns the damper clutch OFF under the following conditions:
- First and reverse gears- To secure quick acceleration at start
- Below approximately 800 RPM- To secure easy start
- Large throttle opening at engine speeds of 2,000 RPM or less- To secure quick acceleration
- Engine braking- To prevent deceleration shock
- 3-2 downshift- To secure shift feeling
- Engine coolant temperature below 122°F (50°C)
If all operating conditions are correct, the TCM switches a signal ON to the Damper Clutch Control Solenoid Valve to engage the torque converter clutch.
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.