Throttle position sensor problems.
24 April 2011, 01:29 PM
#1
Throttle position sensor problems.
Hi all I have a problem on my 95 wrx.
It came up with a fault 42 throttle position sensor so I bought a second hand one off a member on here and after fitting it as JGM website says,it ran ok for a few days then started coming up with a fault 31 idle switch. Now am I right in saying that these two things are on the same unit?
Anyways I swapped back to my original one and its back with fault 42.
If they are the same unit is it likely that Ive bought a faulty unit or is there something else lurking that could be causing the problem?
Thanks.
It came up with a fault 42 throttle position sensor so I bought a second hand one off a member on here and after fitting it as JGM website says,it ran ok for a few days then started coming up with a fault 31 idle switch. Now am I right in saying that these two things are on the same unit?
Anyways I swapped back to my original one and its back with fault 42.
If they are the same unit is it likely that Ive bought a faulty unit or is there something else lurking that could be causing the problem?
Thanks.
24 April 2011, 05:34 PM
#4
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My bad...
What is the idle switch? I am getting a 31 and a 42. Have replaced the throttle sensor and tried to set it up (can get the exact closed voltage, but then the open voltage is out??) but still running crap aswell.
What is the idle switch? I am getting a 31 and a 42. Have replaced the throttle sensor and tried to set it up (can get the exact closed voltage, but then the open voltage is out??) but still running crap aswell.
24 April 2011, 07:27 PM
#5
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I imagine the idle switch is a virtual switch calculated/based on the TPS voltage. i.e. TPS voltage should be greater than 4.2V at idle.
However I am 100% sure that code 42 is cured purely by adjusting the TPS.
However I am 100% sure that code 42 is cured purely by adjusting the TPS.
Last edited by saiklon; 24 April 2011 at 07:29 PM.
24 April 2011, 07:59 PM
#6
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I can't seem to adjust my sensor so that the open and closed voltages are to the required spec. Closed is 4.7 but then it knocks my open voltage out.
What's going on there?
25 April 2011, 08:03 AM
#7
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What is your open throttle voltage?
Aim for closed throttle voltage of 4.5V (you don't want to adjust for the edge of acceptable range as you have been doing).
Looking at logs that I made last week, with a closed throttle voltage of 4.5V, open throttle voltage is about 2V to 1.7V.
Aim for closed throttle voltage of 4.5V (you don't want to adjust for the edge of acceptable range as you have been doing).
Looking at logs that I made last week, with a closed throttle voltage of 4.5V, open throttle voltage is about 2V to 1.7V.
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25 April 2011, 03:59 PM
#8
Musso
Have someone fully depress the accelerator and manually check on the throttle body that its fully opening it might be that your throttle cable needs adjusting as mine did.
This hasn't cured my problem just enabled me to set the tps correctly.
Have someone fully depress the accelerator and manually check on the throttle body that its fully opening it might be that your throttle cable needs adjusting as mine did.
This hasn't cured my problem just enabled me to set the tps correctly.
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