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Old 08-02-2006, 04:28 PM   #1
sixkiller
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Member#: 117091
Join Date: Jun 2006
Chapter/Region: NWIC
Location: Carnation WA
Vehicle:
2001 Impreza RS
Black

Default TPS Adjustment problem

This is on a '02 2.5L Impreza.
The TPS was pulled off and when put back on doesn't adjust even close to the .45 - .55 v spec in the manual - my meter's reading 4.5 vdc.
The manual doesn't say dc but I'm assuming that's what I'm looking for.
That's with the key on and throttle closed.
I'm pretty sure I'm on the correct ECM wires Light green and red - connector B136 or "c" - measuring across pins 15 and 17.
I double checked and made sure the sensor flange is on the right way so it moves if you open the throttle.
Any advice would be great.
Thanks.
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Old 08-02-2006, 04:44 PM   #2
LetItSnow
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Join Date: Jun 2003
Chapter/Region: Tri-State
Location: Cicero, NY
Vehicle:
'10 &'12 Foresters
another Miata convert

Default

TPS is B136, pins as follows:
15 - Power (5V)
16 - Ground (0V)
17 - Signal (0.2V-1.0V closed, 4.2V-4.7V open)

If you're reading from 15 to 17:
5-((0.2+1.0)/2)=4.6V on the average

I'd say you're dead on.
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Old 08-02-2006, 07:03 PM   #3
sixkiller
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Location: Carnation WA
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2001 Impreza RS
Black

Default

Appreciate that explanation. Since I set it for 4.5 and it worked and drives well and now I know why.
Course now I have a constant cel which I'm thinking the out of spec voltage caused.
Thanks again.
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Old 08-02-2006, 08:57 PM   #4
SCOOBY2.5RS
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What is a TPS?
Wow, what a nebie question! lol
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Old 08-02-2006, 09:13 PM   #5
sixkiller
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2001 Impreza RS
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It's a throttle position sensor. And as my stepson found out, if it's way out of adjustment the poor car is quite confused...
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Old 08-02-2006, 09:27 PM   #6
SilverScooby04
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Ummm... yeaaaaahh.. We're putting the new cover sheet on the TPS Reports before they go out, did you get that memo?
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