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 MANUALSPLYMOUTH1985CONQUEST L4-2555CC 2.6L SOHC TURBOREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSENGINE CONTROL MODULETESTING AND INSPECTION
1985 Plymouth Conquest L4-2555cc 2.6L SOHC Turbo
Engine Control Module: Testing and Inspection
1985 Plymouth Conquest L4-2555cc 2.6L SOHC TurboSECTION Testing and Inspection
Fig. 14a Output signal diagnosis chart (Part 1 of 2). 1985-86 Colt & 1985 Conquest:
Fig. 14b Output signal diagnosis chart (Part 2 of 2). 1985-86 Colt & 1985 Conquest:
Fig. 17 ECU terminal identification. Exc. Conquest w/intercooler:
Fig. 18 ECU terminal identification. Conquest w/intercooler:
Using output signal diagnosis chart, Fig. 14 , connect voltmeter to diagnostic connector, Fig. 17 or Fig 18, as specified in ``Terminal Location of Computer'' column in diagnostic chart. Check voltage at each terminal, ensuring tests are made under conditions specified.
When checking the ISC motor position switch, if ignition switch is turned on for 15 seconds or more, the reading will drop momentarily below 5 volts. When checking pressure sensor with engine idling, the reading will increase momentarily to 1.5-2.6 volts every 2 minutes.
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.