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 MANUALSEAGLE1991TALON TSI, FWD, AUTOMATICREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMENGINE CONTROLS - SYSTEM/COMPONENT TESTSCOMPUTERIZED ENGINE CONTROLSCONTROL UNITHARNESS CHECK
1991 Eagle Talon TSi, FWD, Automatic
Harness Check
1991 Eagle Talon TSi, FWD, AutomaticSECTION Harness Check
- If during SELF-DIAGNOSTICS testing, Electronic Control Unit (ECU) is found to be faulty, perform the following steps to confirm diagnosis.
- Most components are incorrectly diagnosed due to faulty electrical connectors or poor connections between component and vehicle.
- Sometimes, simply disconnecting and connecting an electrical component will provide a good electrical connection. Before replacing ECU, check all components in suspected circuit. If components are okay, carefully disconnect ECU from vehicle harness.
- Inspect ECU harness connector and ECU contact pins for corrosion. Clean harness connector and ECU contact pins with contact cleaner.
- Inspect ECU harness connector for bent pins, missing pins and broken wires. Repair or replace as necessary.
- Connect ECU harness connector to ECU and retest system with Diagnostic Readout Box (DRB-II) or similar scan tester. See appropriate G - TESTS W/ CODES article in this Section. If vehicle does not pass test and fails with the same message, replace ECU.
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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.