Question about 1998 Mitsubishi Montero Sport

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HELP ME I changed out my throttle position sensor because the diagnostics tester said that it was bad but i drove it for a little bit and it keep doing it put the tester back on it and it said the same thing

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The tester tells you there is a problem in the TPS circuit, it does not mean that the sensor is bad, it means the entire circuit has a problem, what does this mean? well the TPS can be the problem, the connector may have a bad pin, the wiring harness may have a problem due to a broken wire from engine flex on the harness (fiarly common), the Powertrain Control Module (PCM) may also have a connection problem at the PCM main connector, or the PCM may be the problem, in real life the sensor is most the common problem, the wiring to it the 2nd, and last is the PCM. This is why dealers have 10's of thousands of $'S in test equipment, to find issues like you have, the next thing to do is pin out the entire harness from the TPS back to the PCM, twist and bend every inch of the harness while you have a ohm meter on it, anymore than 5 ohms is a problem in any of the wires, make sure you go from the PCM out to the the TPS, the PCM and TPS must be disconnecteed during this pin point testing.

Posted on Nov 16, 2008

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How to Replace a Throttle Position Sensor
(DIY & Save up to $135.75 ) - Time: 2.1 hours

Parts:
1. Throttle Position Sensor - $ 55.44

Tools:
1. Scan Tool
2. Screwdriver
3. Multimeter

Procedure:
1. Locate the OBD data link connector (DLC). Refer to your owner’s manual for the specific location.
  • Tip: The OBD-I data link connector is usually located in the engine compartment near the battery or the fuse box. The OBD-II connector (post 1995 cars) is usually located beneath the instument panel next to the steering column.
2. Turn your key to the“ON” position. Do not start the engine.

3. Plug your scan tool into the OBD data link connector. Turn on the scan tool and select the appropriate steps to read the diagnostic trouble code (DTC).

    6db8845.jpg

Scanner plugged into OBD-II data link connector.
  • Tip: The OBD-II diagnostic trouble code (DTC) is a 5 character alphanumeric code. The first digit is a letter that indicates the component group, the second digit is OBD mandated or manufacturer specfic, the third digit is a subgroup, and the fourth and fifth digits define the component and basic problem.
  • 4. Locate the throttle position sensor.
6182d26.jpg

  • Throttle position sensor

  • 5. Disconnect the electrical connector from the throttle position sensor.
fc565b1.jpg

  • Electrical connector removed
6. Test the resistance of the throttle position sensor (TPS) with a digital multi-meter. If the resistance is out of specifications, the TPS must be replaced.
  • 7. Remove the throttle position sensor.

  • d3a8007.jpg

    Removing sensor mounting screws

    8. Install the new throttle position sensor. Tighten the mounting screws and attach the electrical connector.
  • 9. Erase the diagnostic trouble code (DTC) with the scan tool using the“delete” or“erase” command. Road test your vehicle to see if the check engine light returns.
fde01cf.jpg

    Check engine light

  • Tip: If the check engine light returns, repeat the diagnostic process for additional DTCs or take your vehicle to a certified repair shop.
Direct OE replacement

Hope helped with this. Good luck (remember rated this help).

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