how to tell if CPS is shot?

[Jon Klein]

I just ran the codes on my 93 atx and I got a 73, and a 122....73 = insufficiant TP change during dynamic test....and 122 = TPS circuit below minimum voltage...so I popped off the TPS and the white rotating piece inside clicked to its resting spot....which apparently wasn't the same as the resting spot of the Throttle plate. Also, if I used a flathead screw driver I could rotate the sensor past the limits of the throttle...does this mean the sensor is done for? thanks guys..

Jon

p.s. I also got a code 532...cluster control assembly circuit failure...and my CE light doesn't work...don't know how to see if its the bulb either...thanks for all the help....u guys r the coolest...

 

[RTStabler51]

http://www.shotimes.com/php-bin/modules.php?op=modload&name=News&file=article&mode=thread&order=0&thold=0&sid=76

 

[rangerj]

Jon,

I will risk making the asumption that you checked your codes because you were having a problem. Was the car stumbling, not responding to the throttle, bogging upon throttle application, running rich, and/or bucking or lagging when the throttle is applied.

These are all possible symptoms of a throttle position sensor (TPS) problem. The code tells you that the computer is not receiving the signal, in this case an amount of voltage, that it is programmed to expect from the TPS.

The maximum is 5 volts(I think), and the minimum is approximately .3 (as in 3/10) volts. Do not automatically assume that the sensor is bad because of the "code". Further diagnostics are required before making that conclusion.

If the circuit between the TPS and the computer is good, that is the connections are making good contact and there is continuity in all the wires, then the TPS is the logical culprit.

Add to the above, the history of the "patient", that is its age and milage, the age of the suspected TPS, and you could conclude that the TPS needs to be replaced. This is especially true if the TPS is the originl sensor.

There is a test for the TPS, a range of ohms resistance, but I do not have access to my reference material currently. Would another forum member please post the ohms range, and the "pins" that the reading is taken from for this test? If the sensor fails this test, it would be prudent to conclude that the sensor needs to be replaced.

As for your cluster code, check your connections, fuzes, and/or relays in this circuit. It would be a good idea to get a look at the bulb in the Check Engine Light circuit. If it is a bad bulb, replace it. If the bulb is good, start looking for a poor connection, or other conductivity problem. Hope this helps, rangerj thumbs_u

 

[Jon Klein]

I know that in the title of my post it says CPS....I meant to type TPS....must still be high on exhaust fumes....sorry about the confusion