Aerostar 2WD V6-182 3.0L (1995)
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Harness damage.
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Connector damage or water in connector.
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Defective TPS, open or short.
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Check VREF for correct output.
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Throttle plate not closing.
(B) - Troubleshooting the TPS
The following is a list of vehicle symptoms which have been associated with the TPS, but can also be related to other vehicle components.
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Check engine light
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Stalls/quits
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Hesitation/stumble
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Fast idle
If an EEC error code has identified the TPS as suspect, perform PC/ED Manual pinpoint tests on the TPS.
Testing the TPS in the vehicle electrical circuit:
The TPS is supplied with a 5.0 volt reference signal. As the TPS senses throttle plate rotation, the output voltage changes to a value in the range of 0.4
volts to 4.8 volts depending on vehicle application. A voltmeter, New Generation Star Tester (NGS) or Service Bay Diagnostics System (SBDS) is the
recommended test equipment for checking the TPS output.
The reason SBDS or NGS are the preferred tools is that they allow TPS voltage monitoring without disturbing the connector. Many conditions can be
caused by loose, dirty, oxidized, or poor connections that may correct themselves for a short time if the connector is disturbed during testing. This can
mislead technicians into replacing a TPS that is okay, and the true cause, a bad connection, may return at some future time.
