How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask MASTER TECH Your Own Question
MASTER TECH, Honda Service Technician
Category: Honda
Satisfied Customers: 5754
Experience:  28 years of Honda training and a master Honda tech
Type Your Honda Question Here...
MASTER TECH is online now
A new question is answered every 9 seconds

Civic P28 pin out diagram VTEC 92-95

This answer was rated:

civic P28 pin out diagram VTEC '92-'95

hello welcome to the site.

what wiring are you looking for ?


Customer: replied 8 years ago.
looking for wiring diagram for honda civic EPU P28, specificly vtec
ok please give me year on these and i can post the etm pin outs

the p28 is obd 1 correct ?


Customer: replied 8 years ago.
92-95 ECU (not ETM)

Yes obd 1 is correct

ok give me some time while i load the info. you just need the pin locations.

your putting a b series motor in correct ?

Customer: replied 8 years ago.
I'm not sure, my grandson is swapping motors, I'll try and call him and get back to you
Customer: replied 8 years ago.
Yes it is a 95 b series

sorry for not asking all this at once.

what harness are you using stock b series engine harness ?

you need knock and vtec .


Customer: replied 8 years ago.
95 b series single cam motor, hatchback, need signal to vtec if that makes sense

ok a B series motor is a duel over head cam motor the D series is a single.

so your upgrading from a none vtec to a vtec motor. yes ?

Customer: replied 8 years ago.
the motor is a D15B, so I'm assuming yes

also the # XXXXX ecu is APR0692

ok you will need to run 2 wires from the vtec switch and the pressure solenoid .

the blk/blu wire will run to the pcm connector c406 and put in terminal D6 and the single pressure solenoid wire will run to c404 pin A4


MASTER TECH and 3 other Honda Specialists are ready to help you
let me know if this helps