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 22 (ENGINE CONTROLS - SYSTEM/COMPONENT TESTS)ENGINE SENSORS & SWITCHESIDLE SPEED CONTROL SERVO & MOTOR POSITION SENSOR (1.8L)
1994 Plymouth Sundance Base, 2D Hatchback, 2.2 D, Automatic
Idle Speed Control Servo & Motor Position Sensor (1.8L)
1994 Plymouth Sundance Base, 2D Hatchback, 2.2 D, AutomaticSECTION Idle Speed Control Servo & Motor Position Sensor (1.8L)
WARNING: This page is about a different car, the 1994 Plymouth Laser and 1994 Eagle Talon. However, it is still accessible from the selected car via links, so may be relevant.
- Motor position sensor is integral with idle speed control servo, located on throttle body. Disconnect motor position sensor connector. Using an ohmmeter, measure resistance between motor position sensor terminals No. 2 and 3. See Figure . Ohmmeter should read 4000-6000 ohms.
- If resistance is not within specification, replace idle speed control servo. If resistance is within specification, go to next step.CAUTION: When activating idle speed control plunger, DO NOT apply more than 6 volts. Higher voltage may cause damage to servo gears.
- Disconnect idle speed control servo connector. Connect a 6-volt power source between idle speed control servo terminals No. 1 and 2 to activate idle speed control servo plunger. See Figure .
- Using an ohmmeter, measure resistance between motor position sensor terminals No. 3 and 5 when idle speed control servo plunger is activated. Ohmmeter should read 4000-6000 ohms.
- Replace idle speed control servo if resistance is not within specification, or if idle speed control servo plunger does not extend and retract smoothly.
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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.