How do I wire my VTEC solenoid to the ECU

Tiny
ACURACL2324
  • MEMBER
  • 1998 ACURA CL
  • 120,000 MILES
The car originally had a f23(non-vtec I believe), and it was swapped to a h22a1. And they have the vtec solenoid wired into the wiring harness, but I dont get vtec. Can I get a diagram, for the correct wiring. Ive been told, non-vtec wiring harness's are actually wired for vtec, but the wire is cut off somewhere along it.

can I get answers from, preferably a honda expert please.
thanks.
Do you
have the same problem?
Yes
No
Monday, October 15th, 2012 AT 5:22 AM

8 Replies

Tiny
KHLOW2008
  • MECHANIC
  • 41,815 POSTS
First thing is you need to have the correct PCM. At the PCM check connector B terminal #12 for a Green/Yellow wire. If it is there, the next place to check where it ends would be the main connector in engine compartment.

If the Green/Yellow wire is not present at PCM terminal, that is where you need to start you wire.

Previously the wireharness are rigged for both models and it seems this practice has been stopped some time back so most likely you won't find the wire there.
Was this
answer
helpful?
Yes
No
Monday, October 15th, 2012 AT 6:46 AM
Tiny
ACURACL2324
  • MEMBER
  • 22 POSTS
I checked out the wiring, the grn/ylw wire goes all the way from the vtec solenoid to the ecu. I have an aftermarket chipped p28 VTEC ecu. So im completely lost on why I have no vtec. Are there any other things I would need to check out?
Was this
answer
helpful?
Yes
No
Monday, October 15th, 2012 AT 3:57 PM
Tiny
ACURACL2324
  • MEMBER
  • 22 POSTS
Does my speedometer not working at all, have anything to do with it?
Was this
answer
helpful?
Yes
No
Monday, October 15th, 2012 AT 4:01 PM
Tiny
KHLOW2008
  • MECHANIC
  • 41,815 POSTS
Did you test the VTEC solenoid to see if it is working? Clogged oil lines and low engine oil can cause that too.

Are you getting any trouble codes?
Was this
answer
helpful?
Yes
No
-1
Monday, October 15th, 2012 AT 4:02 PM
Tiny
KHLOW2008
  • MECHANIC
  • 41,815 POSTS
Speedometer not working can affect performance and gear shifting if it is an automatic transmission.
Was this
answer
helpful?
Yes
No
Monday, October 15th, 2012 AT 4:08 PM
Tiny
WRENCHTECH
  • MECHANIC
  • 20,758 POSTS
How are you able to determine that you don't have VTEC?
Was this
answer
helpful?
Yes
No
Monday, October 15th, 2012 AT 4:25 PM
Tiny
ACURACL2324
  • MEMBER
  • 22 POSTS
When I plug in a scanner to it, it wont even let me run it to see if it throws codes. But I have no check engine light or anything.
Its not an automatic.
And vtec doesnt engage at all is how I know its not working. Id know if vtec hit, its not quiet.
Was this
answer
helpful?
Yes
No
Monday, October 15th, 2012 AT 9:16 PM
Tiny
KHLOW2008
  • MECHANIC
  • 41,815 POSTS
Your previous engine was a VTEC engine as well, just that it is a SOHC with different operating conditions. For the H22A1, VTEC turns on at 5200 rpm and engine noise would sound different with extra pull.

If the scan tool cannot communicate, it can mean something is not wired correctly. If you have battery voltage at terminal # 16 and scan tool does not read, try the manual code retrieval to see if you can get the MIL to flash codes. Bridge terminal # 4 and # 9 and turn ignition switch on to see if it works.

If engine performance is below par, check the exhaust system for clogging.
Was this
answer
helpful?
Yes
No
Tuesday, October 16th, 2012 AT 8:52 AM

Please login or register to post a reply.

Sponsored links