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throttle position sensor
Posted 18 October 2001 - 06:19 PM
Posted 18 October 2001 - 08:19 PM
Here's the procedure out of the chilton's manual to test the TPS switch.
1. Turn the ignition switch ON.
2. Measure the voltage between the ECU connector terminal and ground. Voltage should be as follows:
Terminal 2 and ground: 4.4-4.8 volts with the throttle fully open
Terminal 2 and ground: .7-1.6 volts with the throttle fully closed
Terminal 3 and ground: 5 volts
Terminal 1 and ground: 0 volts
3. Ensure voltage smoothly decreases in response to throttle opening. If measurements are not within specification, check and repair ECU terminals or harness.
4. Disconnect the connector from the throttle sensor. Measure the resistance between throttle sensor terminals 2 and 3. Resistance should be 12 kilo-ohms.
5. Measure the resistance between terminals while slowly opening the throttle valve from the closed position. Resistance should be as follows:
Terminals 2 and 4: 10-12 kilo-ohms with the throttle valve fully closed
Terminals 2 and 4: 3-5 kilo-ohms with the throttle valve fully open
6. Ensure resistance smoothly increases in response to throttle opening. If measurements are not within specification, replace the throttle sensor.
7. Disconnect connectors from ECU and throttle sensor.
8. Measure resistance between ECU connector and throttle sensor connectors. Resistance should be as follows:
ECU terminal 1 and throttle sensor terminal 2: 0 ohms
ECU terminal 2 and throttle sensor terminal 4: 0 ohms
ECU terminal 3 and throttle sensor terminal 3: 0 ohms
9. Measure resistance between throttle sensor connectors and ground. Resistance should be as follows:
Terminal 2 and ground: 1 mega-ohm minimum
Terminal 4 and ground: 1 mega-ohm minimum
Terminal 3 and ground: 1 mega-ohm minimum
10. If resistance is not within specification, check and repair the harness or connector.
I'll try and scan in the sensor wiring diagram tomorrow at work, so you know what pins are what.
Posted 19 October 2001 - 04:20 AM
Posted 19 October 2001 - 06:56 AM
Posted 21 October 2001 - 11:44 AM
Posted 21 October 2001 - 02:29 PM
Josh, would like to know how 'permanent' the location (i.e., server and URL) of that pic is, if the server isn't owned by you and the pic moves it'll break the link. I have my own server & domain so I'd be glad to give it a permanent home. Let me know.
Posted 21 October 2001 - 02:58 PM
I may have to go through some of my old archived posts and edit pic links off my psu account when I move my site.....still need a good domain....any ideas anyone??
Posted 21 October 2001 - 03:04 PM
Here are the directions I found for cleaning a tps.
1. Carefully scribe the rotational position of the tps, disconnect the cable, remove the 2 screws holding the tps.
2. Look into the connector end of the tps and observe a very small hole between the pins. Using contact cleaner ( Radio Shack) and a small tube (like a wd-40 Tube, DO NOT USE WD-40) flush the unit completely,rotating the wiper several timesand letting the fluid drain from the shaft.
4. Using canned air, blow through the hole until the unit is dry.
5. Reasemble,ensuring that the scribe lines match, reconnect.
*** moderator edit: fixed the link. ***
Posted 24 October 2001 - 03:14 PM
Just a note to anyone with this procedure in mind, according to the instructions on my previous post, there is supposed to be a small hole in between the pins that one can squirt the contact cleaner through, however there wasn't a hole on mine, just some spaces around the edges of the unit that allowed access.
Posted 19 November 2001 - 08:34 AM
Archive me some more.....come on....I dare ya....double dog dare.......tripple DOG DARE YA!
Ahh the holidays.....it just can't be christmas with the movie, "A Christmas Story"
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