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.

1990 Eagle Talon Base, AutomaticFACTORY OEM SERVICE PROCEDURE

Throttle Position Sensor (TPS)

TPS is located on throttle body. Disconnect TPS connector.
On 1.8L, measure resistance between TPS terminals No. 2 (sensor ground) and No. 1 (sensor power). See Fig 1 .
On 2.0L, measure resistance between terminals No. 2 (sensor ground) and No. 3 (sensor power). See Figure .
On all engines, resistance should be approximately 3500-6500 ohms. If resistance is not within specification, replace TPS. If resistance is within specification, go to next step.
On 1.8L, connect an ohmmeter between terminals No. 2 (sensor ground) and No. 3 (sensor output). See Fig 1 .
On 2.0L, connect an ohmmeter between terminals No. 2 (sensor ground) and No. 4 (sensor output). See Figure .
On all engines, operate throttle valve slowly from idle position to full open position. Check if resistance changes smoothly in proportion to throttle valve opening angle. Replace TPS if it does not test as described.

Fig 1: Testing Throttle Position Sensor (1.8L)
Courtesy of DAIMLERCHRYSLER CORP.

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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.

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