Throttle Position Sensor (TPS)

1984 Plymouth Horizon Base, 1.6 ASECTION Throttle Position Sensor (TPS)
WARNING: This page is about a different car, the 1994 Plymouth Laser and 1994 Eagle Talon. However, it is still accessible from the selected car via links, so may be relevant.
  1. TPS is located on throttle body. Disconnect TPS connector. Measure resistance between TPS terminals No. 4 (sensor ground) and No. 1 (sensor power). See Fig 1 .
  2. Resistance should be approximately 3500-6500 ohms. If resistance is not within specification, replace TPS. If resistance is within specification, go to next step.
  3. Connect an ohmmeter between terminals No. 4 (sensor ground) and No. 2 (sensor output). See Fig 1 . Operate throttle valve slowly from idle position to fully open position. Resistance should change smoothly in proportion to throttle valve opening angle. Replace TPS if it does not test as described.
Fig 1: Testing Throttle Position Sensor
G91I08000Courtesy of CHRYSLER CORP.
RENDER: 1.0x

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Stop DIY work and contact a certified mechanic immediately if any of the following apply:

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