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.
1989 Eagle Premier ESFACTORY OEM SERVICE PROCEDURE
Throttle Position Sensor (TPS)
- Disconnect TPS electrical connector. Turn ignition on. Using a DVOM, backprobe TPS harness connector between terminals "B" and "C".
- Voltmeter should read approximately 5 volts. If voltmeter reading is incorrect, test vehicle with DRB-II (C-4805 ). If voltmeter reading is correct, go to next step.
- Turn ignition off. Check for continuity between TPS terminal "B" and ground. If circuit is open, test vehicle with DRB-II (C-4805 ). If continuity is present, go to next step.
- Reconnect TPS electrical connector. Turn ignition on. Measure voltage between TPS terminal "A" and ground. Voltmeter should read approximately .5-1.0 volt.
- If voltmeter reading is correct, TPS is okay. If voltmeter reading is incorrect, attempt to adjust TPS. If TPS cannot be adjusted within specification, replace TPS.
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no 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.
Rather have a pro handle this?
A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.
Comes to youSame-day available12-month warranty
Get a Free QuoteNo obligation. See pricing before you book.