ftp2leta
Samba Member
Joined: October 11, 2004
Posts: 3271
Location: Montreal
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 Posted: Tue Feb 28, 2012 8:46 am Post subject: Wiring diagram schematic 101 (Subi) |
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I just shared that for the Subi Yahoo list and I thought It could be interesting for a few of you. This explain the basic of late Subi wiring.
ALL late harness diagram will look like that, by that I mean the cluster/speed
sensor page always look the same. Pin # may or may not change.
So, on this page that look more complicated then (than??) it is, 3 pin # for ECM
ONLY, but the page show a lot of interesting stuff.
A17: Malfunction light/engine light in car cluster, RED/WHITE (ALWAYS)
A23: RPM, always GREEN (all years)
B26: VSS signal, always GREEN/YELLOW (all years)
That page. It's an interesting one.
VSS, vehicle speed sensor for Manuel 5 speed(right/bottom):
Plug B17
-pin 3/Green White = Positive (Ignition), hooked to Green Red (not shown) later
in the harness process.
-Pin 2/Black/blue (L stand for Blue)= Negative
-Pin 1/Green Yellow = signal
Find the other square with TCU (Automatic TRANSMISSION CONTROL UNIT)
Plug B56
Well, we don't care! All we care about is that B26 wire, automatic or 5 speed
mean nothing for us.
The following are going to the cluster (car or van)
A3 would be our oil pressure Switch, ALWAYS GREEN WHITE, all year.
C9, not important for us.
C10, white/green (All year), our cluster temperature. In need a 28 ohm resistor
for VW cluster temps gauge when you use the Subaru sender unit.
On the bottom of page (UNDER THE LINE) you see ALL connector used above, you can
also see the shape (and sometime colour) of each connector.
EX: ECM (just over the bottom line), B26 (VSS), find B(B135), bottom right, find
pin #26 (B26), see it, look behind that pin # and you will find a Green Yellow
wire!!! IT'S you VSS wire.
Most VSS unit need current, positive and negative + the signal wire.
You can take your positive and negative anywhere you want. But make sure it's on the IGNITION (OFF when key is OFF-OUT)
Now, why are you seeing only ECM plug A & B on this page, because above there is NO other pin used in that page, only A & B. On other pages you may see A B C D.
Final note: All letter, left and right of page, in this case:
C (Left bottom), it mean you need to follow that wire to page 1 (we are on page 2 now), same goes for I (will also go to page 1 AND 5), J (page 9), K (Page 10) and L (page 8 )
Harness are not for everyone (Don't worry Tom...) but be sure of one thing, late Subaru diagram schematic are amazing. It's nice to understand the basic.
I hope some of you enjoyed that little wiring info
Ben
_________________
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