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.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSPLYMOUTH1989COLT L4-1468CC 1.5L SOHCREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSCOOLANT TEMPERATURE SENSOR/SWITCH (FOR COMPUTER)TESTING AND INSPECTION
1989 Plymouth Colt L4-1468cc 1.5L SOHC
Coolant Temperature Sensor/Switch (For Computer): Testing and Inspection
1989 Plymouth Colt L4-1468cc 1.5L SOHCSECTION Testing and Inspection
1. Remove sensor from intake manifold, then immerse sensing portion of sensor into a suitable heating container filled with water. Do not allow temperature sensing portion of sensor to directly touch heated portion of container. Ensure hot water is continually stirred and connector terminal is held approximately .12 inch above water.
2. Insert a suitable thermometer into container, then connect an ohmmeter to sensor.
3. Ohmmeter should indicate the following values:
a. At 32°F, ohmmeter should indicate 5900 ohms.
b. At 68°F, ohmmeter should indicate 2500 ohms.
c. At 104°F, ohmmeter should indicate 1100 ohms.
d. At 176°F, ohmmeter should indicate 300 ohms.
4. If resistance values are as specified, coolant temperature sensor is satisfactory. If resistance values are not as specified, replace sensor.
5. Apply a suitable sealant to threaded portion of sensor, then install and torque to 21 ft. lbs., then securely tighten harness connector.
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.