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 MANUALSPLYMOUTH1993LASER FWD L4-1753CC 1.8L SOHCREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSIDLE SPEED MOTOR POSITION SENSORTESTING AND INSPECTIONCOMPONENT TESTS AND GENERAL DIAGNOSTICSSENSOR INSPECTION
1993 Plymouth Laser FWD L4-1753cc 1.8L SOHC
Sensor Inspection
1993 Plymouth Laser FWD L4-1753cc 1.8L SOHCSECTION Sensor Inspection
1. Disconnect the idle speed control motor position sensor connector.
2. Measure the resistance between terminals (2) and (3).
Standard value: 4-6k Ohms
3. Disconnect the idle speed control motor connector.
4. Connect DC 6V between terminals (1) and (2) of the idle speed control motor connector, and then measure the resistance between terminals (3) and (5) of the idle speed control motor position sensor connector when the idle speed control motor is activated (caused to expand and contract).
Standard value: Smooth increase/decrease in accordance with expansion and contraction of the idle speed control motor plunger.
Caution: Apply only a 6V DC or lower voltage. Application of higher voltage could cause locking of the servo gears.
5. If there is a deviation from the standard value, or if the change is not smooth, replace the idle speed control motor assembly.
RENDER: 1.0x
NO RELATED
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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.