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Old 11-04-2001, 11:02 PM   #1
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Member#: 10362
Join Date: Sep 2001
Location: Baltimore MD y Allen TX
WRX 03>04Rallystylz
+ 02 F150 6 cyl 5 speeed!

Default a/f ratio o2 sensor meter tap apex tt

Where on the ecu do i tap for my turbo timer's air/fuel ratio meter. I guess it is the front o2 sensor but it reads 2+ volts and my turbo timer calculates based on 0 to 1 volt. Also where do I ground the tt
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Old 11-05-2001, 12:38 AM   #2
Jon [in CT]
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Member#: 2992
Join Date: Nov 2000
Chapter/Region: NESIC
Location: Connecticut, USA
02 WRX Sedan


May I assume that you're aware of the 2002 WRX ECM wiring description at http://www.northursalia.com/m...in/wrxpin.html? Then you'll have to splice into the rear O2 sensor's signal (B17) since, as you've observed, the US WRX's front A/F sensor is incompatible with your A/F gauge. Grounding possibilities are too numerous to mention.
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Old 11-05-2001, 09:14 AM   #3
Scooby Newbie
Member#: 8577
Join Date: Jul 2001
Location: socal
2002 wRx wHiTe OnE
AsPiRiNg I-cLuB RyCeBoI


i have the exact same TT as you, tap the a/f line into b17(white) and the ground into b19(green/red)
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