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 MANUALSPLYMOUTH1985CONQUEST L4-2555CC 2.6L SOHC TURBOREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSTHROTTLE FULL CLOSE SWITCHTESTING AND INSPECTION
1985 Plymouth Conquest L4-2555cc 2.6L SOHC Turbo
Throttle Full Close Switch: Testing and Inspection
1985 Plymouth Conquest L4-2555cc 2.6L SOHC TurboSECTION Testing and Inspection
Fig. 29 Idle switch test. 1985-86:
1. Disconnect electrical connector from ISC servo with ignition off.
2. Check for continuity between connector terminal 2, Fig. 29, and injection mixer body (GND). Continuity should exist when throttle valve is in idle position and should not exist when throttle valve is opened.
3. If continuity is not as described, the ISC servo should be replaced.
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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.