Help with TPS volt reading

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Mar 14, 2013 | 07:17 AM

Borgli

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Joined: Sep 2010

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Year: 1992

Model: Cherokee

Engine: 4.0L

Help with TPS volt reading

Hi, I just did a reading on my tps. At idle it was .43v and on open throttle it showed 2.63-2.65v. What does this mean? Is it toast? My only engine issues are rough idle.

Mar 17, 2013 | 01:22 AM

go-part

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Model: Cherokee

According to the maufacturer specs:
Idle: greater than .2V
WOT: less than 4.8V

Looks like the tps is ok. Check/ clean the IAC next.

Mar 17, 2013 | 02:56 AM

salad

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Joined: Nov 2011

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From: Parham, ON

Year: 1999

Model: Cherokee

Engine: 4.0L OBD-II

Your TPS definitely sounds shot. 2.8V at WOT is FAR too little. The TPS' signal is read as a percentage of it supply voltage, being 5VDC. Output should be 0.2 to 0.5 when shut and 4.5-4.9 VDC when open.

Mar 17, 2013 | 03:42 AM

Borgli

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Year: 1992

Model: Cherokee

Engine: 4.0L

Quote:

Originally Posted by salad

Thats what I though, just to be sure: I am probing the connector with three wires, I understand that that is for the ECM. Also. My color coding does not add up. My + is supposed to be output and my output is supposed to be +, according to the test guide... Someone eliminated the connector at some point.