Nextelbuddy

i finally got my wiring correct by tracing back to the ecu by color....

im stil getting a cel showing only code 3 looked up in ecu thread and it says map sensor... but there is anotehr map sensor code 5..

after reading through archives i se most people get code 5 not code 3 but i am getting code 3... what does this mean?? is it possible that by trying so many different wire combonations i shorted out the map sensor ??

just trying to figure out whats the difference between code 3 and 5

Turbogixxer

Nothing. Code 3 is for MAP curcuit and so it is code 5. The only difference is that code 5 is for D15b7 (DX/LX). The map for the d15b7 has different vacuum lines and vavles then other d-series.

If you find the problem for code 3, it will probably find the problem for code 5 too.

BTW, you getting code 13 by chance?

Nextelbuddy

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Turbogixxer &raquo;</TD></TR><TR><TD CLASS="quote">Nothing. Code 3 is for MAP curcuit and so it is code 5. The only difference is that code 5 is for D15b7 (DX/LX). The map for the d15b7 has different vacuum lines and vavles then other d-series.

If you find the problem for code 3, it will probably find the problem for code 5 too.

BTW, you getting code 13 by chance?</TD></TR></TABLE>

funny you ask that because at one point in time last night i did get that CEL code 13... but now i dont get it anymore just only CEL 3 and thats it..

Chiovnidca

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Nextelbuddy &raquo;</TD></TR><TR><TD CLASS="quote">

just trying to figure out whats the difference between code 3 and 5</TD></TR></TABLE>
Code 3 point toward an electrical problem. Code 5 points toward a mechanical problem.

Ej1_coupe

I was throwing a code 3 for almost 6 months. Finally the map sensor took a **** on me and the car would just shut off in the middle of driving sometimes. I purchased a new one from honda and it ran like a charm.

Nextelbuddy

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Ej1_coupe &raquo;</TD></TR><TR><TD CLASS="quote">I was throwing a code 3 for almost 6 months. Finally the map sensor took a **** on me and the car would just shut off in the middle of driving sometimes. I purchased a new one from honda and it ran like a charm. </TD></TR></TABLE>

realy? well im going to get a new one today anyways..

i have anothe question though.. when you throw a CEL cod 3 for MAP VTEC does not engage correct? i was under the assumption that when ever you have a CEL vtec does not engage...

but my last civic vtec would engage even if i through say a o2 sensor cel just trying to get some confirmation here...

i was throwing code 21 last night for vtec solonoid.. fixed that now i dont throw a 21 code anymore only code 3 but still vtec does not engage .. i was pretty sure that it was because of the CEl so i wasnt that worried last nigh about it

Turbogixxer

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Nextelbuddy &raquo;</TD></TR><TR><TD CLASS="quote">

funny you ask that because at one point in time last night i did get that CEL code 13... but now i dont get it anymore just only CEL 3 and thats it.. </TD></TR></TABLE>

You running the TB mounted MAP sensor or runnning the stock DX MAP sensor on the firewall?

Nextelbuddy

im using the throttle body mounted sensor that came with the b16a2...

whats a good way to check the MAP sensor with a volt meter to see if its fried or not?

Turbogixxer

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Nextelbuddy &raquo;</TD></TR><TR><TD CLASS="quote">
i have anothe question though.. when you throw a CEL cod 3 for MAP VTEC does not engage correct? i was under the assumption that when ever you have a CEL vtec does not engage...</TD></TR></TABLE>

If it is a code for a main sensor (MAP, TPS, etc) the ECU will disable vtec. 02 sesnor codes will not disable vtec.

Nextelbuddy

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Turbogixxer &raquo;</TD></TR><TR><TD CLASS="quote">

If it is a code for a main sensor (MAP, TPS, etc) the ECU will disable vtec. 02 sesnor codes will not disable vtec.</TD></TR></TABLE>

thanx gixxer for your fast responses.


i just reread my posts and realized how poorly i worded my questions lol

Turbogixxer

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Nextelbuddy &raquo;</TD></TR><TR><TD CLASS="quote">whats a good way to check the MAP sensor with a volt meter to see if its fried or not?</TD></TR></TABLE>

Pull the map off and see if it holds vacuum, if not, replace it.

Yes, With the key in the on position, measure the voltage between D17 (+) and D21(-). You should have about 3v

Now, start the engine and let it idle for a bit, measure it again. It should be around 1v.

If either one is not reading right, first check the wiring (I posted it in your other thread) then, replace it.