TPS resistance question
02-09-03, 04:02 PM
#1
My Custom Title > Your's
Thread Starter
TPS resistance question
I tested the TPS with my multimeter and adjusted it to 1k ohm then I plugged it back in and started the car. The voltage for the TPS is showing .63 on the safc (which I verified at the ecu). Bad TPS? Bad ECU? Whats the problem shouldnt setting it to 1k ohm result in a 1V reading at the ECU?
02-09-03, 04:43 PM
#2
HAILERS
Join Date: May 2001
Location: FORT WORTH, TEXAS,USA
Posts: 20,563
Likes: 0
Received 21 Likes
on
19 Posts
There's nothing wrong. Screw the tps to one volt with the engine fully hot and idling.
The bottom line is like you said and have been reading in the fsm. At idle, the tps should be approx one,1volt.
Even if you set your tps using the two LED light method, you would find that your safc would read b/t .095 volts and 1.05 volts. That is *approx* one volts.
If you get up one morning and look at your safc's reading, it will probably be in the 1.90 volt range, if you have the thermowax etc still in place. Do not be alarmed. Heat the car up and the reading will gradually diminish to the original setting of one volt, approx. That high reading would have been a result of the fast idle cam riding on the roll pin in the cold start system.
If you dismantled your cold start system....ignore the above paragraph just above on the cold start.
And P.S. .....the one volt or in your case the .68 or whatever reading, is coming from the tps itself, not the ECU. It is going TO the ECU, not from.
The bottom line is like you said and have been reading in the fsm. At idle, the tps should be approx one,1volt.
Even if you set your tps using the two LED light method, you would find that your safc would read b/t .095 volts and 1.05 volts. That is *approx* one volts.
If you get up one morning and look at your safc's reading, it will probably be in the 1.90 volt range, if you have the thermowax etc still in place. Do not be alarmed. Heat the car up and the reading will gradually diminish to the original setting of one volt, approx. That high reading would have been a result of the fast idle cam riding on the roll pin in the cold start system.
If you dismantled your cold start system....ignore the above paragraph just above on the cold start.
And P.S. .....the one volt or in your case the .68 or whatever reading, is coming from the tps itself, not the ECU. It is going TO the ECU, not from.
Last edited by HAILERS; 02-09-03 at 04:46 PM.
Thread
Thread Starter
Forum
Replies
Last Post
Nosferatu
2nd Generation Specific (1986-1992)
7
09-05-15 02:13 PM