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 MANUALSPLYMOUTH1994SUNDANCE BASE, 2D HATCHBACK, 2.2 D, AUTOMATICREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 25 (INSTRUMENT PANEL - ANALOG (SEDAN))TESTINGCOMBINATION OIL SENDING UNIT TEST
1994 Plymouth Sundance Base, 2D Hatchback, 2.2 D, Automatic
Combination Oil Sending Unit Test
1994 Plymouth Sundance Base, 2D Hatchback, 2.2 D, AutomaticSECTION Combination Oil Sending Unit Test
WARNING: This page is about a different car, the 1994 Plymouth Acclaim, 1994 Dodge Spirit, and 1994 Chrysler LeBaron. However, it is still accessible from the selected car via links, so may be relevant.
- With engine off, locate and disconnect combination oil sending unit connector. To locate sending unit, see appropriate illustration. See Fig 1 and Fig 2 . To check low oil pressure switch portion of combination oil sending unit, measure resistance between appropriate switch terminal and metal housing of sending unit. See Fig 3 .
- Reading should be zero ohms. If reading is not zero ohms, replace sending unit. If reading is correct, start engine. Ohmmeter should read open circuit with oil pressure present. Replace sending unit if either reading is not as specified.
- To check oil pressure sending unit portion of combination oil sending unit, measure resistance between sending unit and metal housing. Ohmmeter should indicate open circuit with engine off. Start engine. Ohmmeter should read 30-55 ohms, depending on engine speed, oil temperature and oil viscosity. If reading is not within specification, replace sending unit.
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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.