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Old 10-08-2012, 11:42 PM   #1
Russ Jerome
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Member#: 255397
Join Date: Aug 2010
Location: Milwaukee WI
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2003 Multiple

Default What ECM pin feeds ground to front O2?

People have posted scans of pinouts but they are expired, simple pin location would help greatly. No ground feed to front o2, heater code with good power feed but weak (6v) ground side (no load, dvm).

Edit, correct answer is:

Connector "D" has pins for front O2 sensor:

Sensor + D19
Sensor - D29
Heater 1/2 is D4 and D5.


Disregard colors as they change between ECM and underhood connector.
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Last edited by Russ Jerome; 10-09-2012 at 11:30 PM.
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Old 10-09-2012, 09:36 AM   #2
Uncle Scotty
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what code is it throwing????

the CODE....the verbage is irrelevant

and it isnt the ecu....there is a fuse that may be blown....but ya not gonna figure this out without the factory manual....poke and hope anint gonna get it with these things
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Old 10-09-2012, 07:54 PM   #3
Russ Jerome
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2003 Multiple

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Front o2 heater code low input, battery voltage to heater is KOEO at 12+ volts, ECM ground apears weak at 6v with DVM at o2 connector at strut tower.

Simply need pinout for heater ground supply from ecm (that apears to be ecm means of monitoring heater function thru amp draw).
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Old 10-09-2012, 11:29 PM   #4
Russ Jerome
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Member#: 255397
Join Date: Aug 2010
Location: Milwaukee WI
Vehicle:
2003 Multiple

Default

Connector "D" has pins for front O2 sensor:

Sensor + D19
Sensor - D29
Heater 1/2 is D4 and D5.

Disregard colors as they change between ECM and underhood connector.
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Old 10-10-2012, 12:34 PM   #5
Uncle Scotty
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what exactly are you trying to accomplish here???

i THINK you may be pissing in the wind and could accomplish what you need without doing anything that you THINK you need to do or want to do

this is quite common as subarus are DIFFERENT and people who are used to other kinds of cars quite often chase their asses with both hands and never figure it out

and the fix they were chasing was a VERY simple one...IF you know subarus
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Old 10-10-2012, 12:35 PM   #6
Uncle Scotty
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also....the factory manual is quite easily found...for free...if you look around
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Old 10-10-2012, 12:36 PM   #7
Uncle Scotty
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and you STILL didnt tell us the CODE....the CODE that it is throwing....you gave the irrelevant verbage
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Old 10-11-2012, 05:31 PM   #8
Russ Jerome
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Quote:
Originally Posted by Uncle Scotty View Post
and you STILL didnt tell us the CODE....the CODE that it is throwing....you gave the irrelevant verbage
Since nobody has answered the question the code realy doesnt matter does it??? 30yr ASE master tech simply asked if you knew the pinout for the grounding circut of front sensor, I posted the answer if the original question was unclear, thanks for help.
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Old 10-11-2012, 10:56 PM   #9
Uncle Scotty
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Quote:
Originally Posted by Russ Jerome View Post
Since nobody has answered the question the code realy doesnt matter does it??? 30yr ASE master tech simply asked if you knew the pinout for the grounding circut of front sensor, I posted the answer if the original question was unclear, thanks for help.


that's bloody marvelous



ive seen lotsa stupid car techs out there....30 years or not


and it is an almost certanty that people who ask these kinds of questions around here are just about to do something stupid to REALLY stupid

but I dont know nuthin......

Last edited by Uncle Scotty; 10-11-2012 at 11:02 PM.
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