VTEC Installation

and im a noob ;D

how do i get an ECU code LOL

i was told i got an aftermarket tacho if this helps

Did u find a new pressure switch or is it at least hooked up "temporarily",pics please.

If it is hooked up,connect a small wattage 12V globe between pin A13 on the ecu & a 12V power source such as the ignition supply on your clock.

then turn on the ignition & see if the globe blinks at you & count them,noting any pauses, & long/short flashes.

Could also hook up a 12V small wattage globe,one end to the vtec solenoid wire the other end to ground & go for a drive & see if it lights up at the vtec engagement point for your engine.Dont disconnect the solenoid wire ,just tap the globe wire into it somewhere ,prob at one of the joints youve made in the wire.

ooo nice idea CRXer! btw thanks for comming last night woke up extra early to install it..

i followed the wires from A4 and D6 and found it was on the wiring harness which lead to the shock tower at passenger side.

other side of the plug had no wires or anything connected to it..

so basically cut the two wires from the plug and connected 1 to solenoid 1 to pressure switch (not new just temp was able to plug what you gave and taped it up with electrical tape at this time looks like it holds, took a 30 mins drive to test if it held)

then grounded the last wire

... after reading your post it gave me that good idea..

ill get a bulb i have..

wire the positive to a13 on the ECU? negative ground it anywhere.
edit : from my spreadsheet a13 is : 13 GRN/ORG MIL Code Light Ctrl.

what does this have anythign to do with vtec engaging?

have a drive on the m4/m7 and see if works?

if the bulb lights what will i be liooking for?

Quote:

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Originally Posted by XP02ED

ill get a bulb i have..

wire the positive to a13 on the ECU? negative ground it anywhere.

have a drive on the m4/m7 and see if works?

if the bulb lights what will i be liooking for?

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Other way round.

The ecu grounds the globe,so u could say A13 is the ground & u need to find a 12V supply for the other end of the globe,globes dont have a polarity,just make sure its a small wattage like 2 watts or less,i dont know exactly how much the contacts inside the ecu can handle.

U probably have the codes stored already,since u have started it without the wiring in place previously,so u will have to reset the ecu to clear the codes,by turning the ignition off & pulling out your backup fuse for 10secs & then replacing it.

I dont know what your backup fuse is,maybe one of the civic boys can help u,but it will be in the engine bay fuse box & will be a 7.5 or 10A fuse,so maybe just pull all of them out that have this rating for 10secs.or just disconnect the battery negative terminal as another alternative.

Then go for a short drive,turn your car off,connect the D4 ecu terminal to ground,then turn back on to the ignition on position(not start), & watch the globe.

eg code 3 + code 22 will be,3 short flashes,3-5sec pause,2 long flashes,1sec pause,2 short flashes,then it all repeats again

Edit after your done turn ignition off & remove D4 wire from ground,then reset ecu again.

ooo i guess a kwik way is just to

take out the battery for 1 minute this should clear my ECU right?

BUT what ya just said went past me!

ok well a13 is negative, so thats my griound.. ill wire from positive to globe as my positive then right?

so after i got for a drive connect the d4 wire on ECU to ground on globe? or on wire?

d4 = BROWN WIRE - Diagnostic (timing) < this correct>?

ok looking at ECU layout on plugs B1 is a power input can i run a wire from that as positive then? so keep all wires inside the car while driving

from the flashes and things how do i knoe if vtec was installed?


EDIT :

afdter some thought, i was thinking

get a globe with 2 wires..

wire one end to A4 and another anywhere else depending on ground or positive
is the a4 wire a positive or negative wire?

anywaiz once i figure this out, go for a HARD drive, and if the light glows id assum vtec is working yes?

Quote:

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Originally Posted by XP02ED

ooo i guess a kwik way is just to

take out the battery for 1 minute this should clear my ECU right?just disconnect the neg terminal for 10-20secs.

BUT what ya just said went past me!

ok well a13 is negative, so thats my griound.. ill wire from positive to globe as my positive then right?Yes,tap into a supply with a small fuse on it like your ignition wire to your stereo or clock,etc.Or just run a wire with small fuse in it to battery positive,just make sure u use the less than 2 watt globe.

so after i got for a drive connect the d4 wire on ECU to ground on globe? or on wire?connect D4 straight to ground,its the SCS service check connector u have prob read about.U need to do this to adjust timing as well.

d4 = BROWN WIRE - Diagnostic (timing) < this correct>?see above

ok looking at ECU layout on plugs B1 is a power input can i run a wire from that as positive then? so keep all wires inside the car while drivingyes u could,but u wont get any indications of power supply probs with the ecu,which is not a great deal.

from the flashes and things how do i knoe if vtec was installed?Report back any code flashes u note.also hook up the globe to the solenoid wire as i described above & see if it comes on when u go past your vtec rpm point,i dont know what it is for your engine,prob around the 5krpm mark.

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Blue bits

Quote:

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Originally Posted by XP02ED

EDIT :

afdter some thought, i was thinking

get a globe with 2 wires..

wire one end to A4 and another anywhere else depending on ground or positive
is the a4 wire a positive or negative wire?

anywaiz once i figure this out, go for a HARD drive, and if the light glows id assum vtec is working yes?

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A4 is a 12V positive output to the solenoid to activate it.So hook up the other end of the globe to ground.

Dont forget your tapping into this A4 wire,dont disconnect it from the solenoid.

If u connect your globe at the ecu end then its not going to tell u that the power is reaching the solenoid,u have to tap it into the solenoid end to make sure.

This test will only tell ya that all conditions have been met to allow vtec activation via the solenoid,it will not tell ya that the actual hyraulics in the cams are working correctly,but youll prob notice this anyway,as it will be running pretty crappy in the high rpm's

ok reading that... this is what i understand...

1.Disconnect Negative from batter..
2.Grab a bulb less than 2 watts.. connect it to A13 (ecu) for ground and a wire to somewhere for the positive end
3.Go for a drive trying to maximise speed or RPM
4.Connect a wire from D4(ecu) to ground (i got no idea what this is gna do and how its gna work)
5. d/c my battery again.
6. Put car On (not ignition) then see what happens with bulb?

im not getting how this is gna work / and what its gna do

well what im gna do to test Vtec engaging would be

Tap into Vtec wiring on A4 and use it as a positive to a light bulb,
Ground the negative,
run my car if it glows vtec engages, so this mean that vtec was wired correctly.. to see if it is working i'll have to do the method you posted above, which im having diffuctly understanding

Quote:

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Originally Posted by XP02ED

ok reading that... this is what i understand...

1.Disconnect Negative from batter..yes to clear codes already stored in ecu,only have to do for 10-20 secs
2.Grab a bulb less than 2 watts.. connect it to A13 (ecu) for ground and a wire to somewhere for the positive endyes
3.Go for a drive trying to maximise speed or RPMIn the speed limit of course.U only have to be doing over about 30km/hr,but vtec will engage at about 5krpm,like i said i dont know the exact figure for your car
4.Connect a wire from D4(ecu) to ground (i got no idea what this is gna do and how its gna work)Puts the ecu into diagnostic mode
5. d/c my battery again.do this last after u have seen if any codes flash
6. Put car On (not ignition) then see what happens with bulb?Put car onto ignition "on",ie oil & battery lights come up on your dash,u dont have to start engine.

im not getting how this is gna work / and what its gna do

well what im gna do to test Vtec engaging would be

Tap into Vtec wiring on A4 and use it as a positive to a light bulb,
Ground the negative,
run my car if it glows vtec engages, so this mean that vtec was wired correctly.. to see if it is working i'll have to do the method you posted above, which im having diffuctly understandingJust do the code check first & then when all the codes are sorted,hook the vtec light up

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blue bits

4.Connect a wire from D4(ecu) to ground (i got no idea what this is gna do and how its gna work)Puts the ecu into diagnostic mode

yeh so i ground that wire, right then what else do i do? is that all?
i dont get how its gna tell the bulb the codes?
and while i wire this to ground will the bulb be wired to a13 for grounding and a wire to positive on the battery (pr anywhere)

is the steps correct besides #5, i do that last

Yes the bulb from A13 to ground is your check engine light which u dont have on your stock cluster,this is a temporary arrangement so u can do the code check.

If the ecu is in diagnostic mode by grounding D4,it will flash the fault codes it has stored after your drive once you turn the car off then turn it back on to the ignition "on" position.Ground D4 after u turn the car off.Hopefully the bulb will just stay on not flashing at all,telling u that it has not detected any faults.

ok basic end summary before i test it tmz morning :

.Disconnect Negative from batter..yes to clear codes already stored in ecu,only have to do for 10-20 secs
2.Grab a bulb less than 2 watts.. connect it to A13 (ecu) for ground and a wire to somewhere for the positive endyes
3.Go for a drive trying to maximise speed or RPMIn the speed limit of course.
4.Connect a wire from D4(ecu) to ground
5. Put car On (not ignition) then see what happens with bulb?
6. if the bulb doesnt flash. remove battery again

remove current setup

get a wire from where vtec connects in engine bay connect wire to positive of wire to the bulb, and ground the other end.
have a drive and see if bulb lights on to see if vtec engages!

hopefully this is right if so ill let ya know tmz what happens!