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 MANUALSFORD1985THUNDERBIRD BASE, 2.3 W, AUTOMATICREPAIR AND DIAGNOSISENGINE PERFORMANCETESTING & DIAGNOSIS1.6L & 2.3L EFI/TURBO TESTSTESTINGCONTINUOUS MONITOR (WIGGLE) TEST PROCEDURE
1985 Ford Thunderbird Base, 2.3 W, Automatic
Continuous Monitor (Wiggle) Test Procedure
1985 Ford Thunderbird Base, 2.3 W, AutomaticSECTION Continuous Monitor (Wiggle) Test Procedure
NOTE:
Make sure that Self-Test is deactivated. DO NOT
activate Self-Test unless specifically instructed to do so.
- This test monitors ECA inputs for shorts and opens. Self-Test Output (STO) will be activated each time a fault is detected. If the STO is activated for long enough during key ON/Engine Off portion of test, a service code will be stored. During the Engine Running Portion of this test, a service code will be stored for each fault.
- A detected fault is indicated by a 10.5 volt or greater deflection on VOPM. One or both of the following modes may be used to find the intermittent fault.
- Key ON/Engine OFF: Self-Test deactivate the ignition switch ON.
- Key On/Engine Running: Self-Test activated. Perform Engine Running Self-Test. After service code output has finished, do not turn engine off or deactivate Self-Test. About 2 minutes after code 11 has been displayed. Continuous Monitor (Wiggle) Test mode will start. The system will remain in Continuous Monitor mode until Self-Test is deactivated or engine is turned off.NOTE: An alternate method of entering Continuous Monitor (Wiggle) mode with engine running is to start Engine Running test, exit, and reenter Engine Running test without turning engine off.
- Observe VOM while moving, wiggling, and tapping the system harness, connectors, and sensors. If an intermittent condition is created, the monitor will indicate this by storing a service code.
- Perform Key ON/Engine OFF Self-Test to retrieve codes. If any codes are indicated, go to proper test as shown in Continuous Test table. If no codes appear, the fault is not in a monitored EEC sensor circuit. EEC testing is complete. Refer to Diagnosis By Symptom Test for additional testing information.
NOTE:
Continuous test can only be run once without turning ignition off. DO NOT
miss any of the service codes.
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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.