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 MANUALSSATURN1996SW2 L4-1.9L DOHC VIN 7REPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSTESTING AND INSPECTIONCOMPONENT TESTS AND GENERAL DIAGNOSTICSAUTOMATIC TRANSAXLE CONTROLSGENERAL DESCRIPTIONTRANSAXLE FLUID TEMPERATURE SENSOR
1996 Saturn SW2 L4-1.9L DOHC VIN 7
Transaxle Fluid Temperature Sensor
1996 Saturn SW2 L4-1.9L DOHC VIN 7SECTION Transaxle Fluid Temperature Sensor
The Transaxle Fluid Temperature Sensor is a thermistor-type sensor located in a transaxle pressure port, near the pressure filter. Sensor resistance increases as temperature decreases, and decreases as the temperature increases. The PCM supplies a five volt signal to the sensor on circuit 586. The PCM monitors the return signal as it varies up and down with circuit resistance. The voltage value on the signal line is converted to a temperature value internally by the PCM.
The PCM uses transaxle fluid temperature to calculate enable/disable of functions and shift schedules. When the PCM calculates temperatures below -13°C (9°F) the PCM/TC will control the transaxle using only 1st and 3rd gears. Once above -12°C (10°F) the PCM/TC uses standard shift schedules.
The PCM uses transaxle fluid temperature to enable torque converter clutch (TCC) operation. Transaxle temperature above a given value in relation to inlet air temperature (IAT) will allow TCC operation.
The PCM uses transaxle fluid temperature to disable the transaxle adaptive functions if less than 28°C (82°F) or greater than 14O°C (284°F).
The PCM uses transaxle fluid temperature to calculate enable/disable of functions and shift schedules. When the PCM calculates temperatures below -13°C (9°F) the PCM/TC will control the transaxle using only 1st and 3rd gears. Once above -12°C (10°F) the PCM/TC uses standard shift schedules.
The PCM uses transaxle fluid temperature to enable torque converter clutch (TCC) operation. Transaxle temperature above a given value in relation to inlet air temperature (IAT) will allow TCC operation.
The PCM uses transaxle fluid temperature to disable the transaxle adaptive functions if less than 28°C (82°F) or greater than 14O°C (284°F).
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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.