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 MANUALSPLYMOUTH1984HORIZON BASE, 1.6 AREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 7 (ENGINE CONTROLS - TESTS W/CODES - 2.2L)VERIFICATION TESTSVERIFICATION PROCEDURE VER-2
1984 Plymouth Horizon Base, 1.6 A
Verification Procedure VER-2
1984 Plymouth Horizon Base, 1.6 ASECTION Verification Procedure VER-2
WARNING: This page is about a different car, the 1994 Plymouth Sundance and 1994 Dodge Shadow. However, it is still accessible from the selected car via links, so may be relevant.
- Inspect vehicle to ensure all engine components are connected. Reassemble and reconnect components as necessary. If this test is being performed subsequent to a NO TROUBLE CODE test, go to next step. If this test is being performed subsequent to a TROUBLE CODE test, go to test 3).
- Check if initial symptom still exists. If initial or another symptom exists, repair is not complete. Check if any pertinent TECH SERVICE BULLETINS (TSBs) apply to vehicle and return to TEST NTC-1A , if necessary.
- If any trouble codes have not been diagnosed, go to TEST TC-1A and finish diagnosing other trouble codes. If all trouble codes have been diagnosed, go to next step.
- If Powertrain Control Module (PCM) has not been changed, connect DRB to PCM data link connector and erase trouble codes. Using DRB, reset all values in adaptive memory. Disconnect DRB. Go to next step.
- To ensure no other trouble code remains, if vehicle is equipped with A/C, turn on A/C and blower. Drive vehicle at least 5 minutes. While driving vehicle, attain a speed of 40 MPH. Ensure transmission shifts smoothly through all gears. After road test, turn engine off. Go to next step.
- Start engine. Allow engine to idle for at least 2 minutes. Turn engine off. Connect DRB to PCM data link connector. Using DRB, read trouble codes. If repaired trouble code has reset, repair is not complete. Go to next step.
- Check if any pertinent TECH SERVICE BULLETINS (TSBs) apply to vehicle and return to TEST TC-1A, if necessary. If another trouble code has set, go to TEST TC-1A . If no trouble codes are set, repair is complete.
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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.