95vr6man

i have a built obd2 d16y8 in a 89 hatch and using all the obd2 wiring harness and automatic ecu. i can turn on the starter and fuel pump but there should be a way to turn on the ecu as well before the car will start correct? well what do i need to do to jump the ecu so it turns on? this will be a track car only so thats why im not to worried about wiring up the dash or anything like that. any help would be greatly apreciated.

95vr6man

does anybody know?

95vr6man

bump.... somebody has to know this..... i need help

DJ_SaNdOz

if the ECU is plugged in teh harness, and the key is on access atleast, the ECU should be "on"

95vr6man

there is no key, there is just an engine harness and ecu and fuel pump. the wiring harness is not hooked up to ANY dash components. there is about to be no dash at all except for a few toggle switches and a push botton start. its a TRACK ONLY car.

IHateJDM

look for the wires that go to the ignition. when you turn the key to the acc position, that's when the ecu gets power (you can see your cel come on for a sec while the ecu runs a self-check). Find some way to trick the ecu into thinking there is a key in the ignition and you are good to go.

95vr6man

thanks for the help. BUT. the ignition is an 88 civic dx, and the ecu is a 98 civic ex. the wires will be different colors and different positions on the ecu cuz they are different ecu's right?


Modified by 95vr6man at 11:32 AM 5/4/2005

IHateJDM

yeah, obd0 to obd2 is a big change. I wish i could help you more than that, but honestly i can't. you need to get pinouts for the obd0 and obd2, then one by one change/add wires. it'll be a pita.

95vr6man

i would do that, but im not keeping any of the origonal dash or anything. i want my dash to consist of a few toggles (fuel pump relay, ecu relay) then a push botton start. maybe if i could find a how to on a push botton start i could find the right wires.... anybody else have any ideas? i know somebody has done this before.

IHateJDM

then just find the obd2 pinout and run the wires directly for the parts you are going to use. same idea, it just won't take as long.

95vr6man

ok ive found a pin out but it just says a 3 letter abreviation of what each wire is. i need to know which one turns the ecu to "ON" so i can start the car, the whole harness is hooked up to the motor like its suposed to be other than that.


here is what im looking at right now. can u identify what i need to put power to to get the ecu to turn on?
http://www.we-todd-did-racing....DE%3D

IHateJDM

These should help. you may still need wire colors for the main relay though, i'm not sure where those are posted at.

https://honda-tech.com/zerothread?id=558245

KEY:
(Wire color), (Function/Description (if need be)), (Voltage Value (DC Volts Unless otherwise specified)
V = Volts
Wht = White
Blk = Black
Grn = Green
Yel = Yellow
Brn = Brown
Blu = Blue
Org = Orange

KOEO = Key on; Engine OFF
KOER = Key on; Engine Running

OBD1
A1-INJ1 INJ1 Brown, Battery Voltage with KOEO
A2-INJ4 INJ4 Yellow, Battery Voltage with KOEO
A3-INJ2 INJ2 Red, Battery Voltage with KOEO
A4-VTS VTEC solenoid GRN/YEL, N/a
A5-INJ3 INJ3 Blue, Battery Voltage with KOEO
A6-PO2SHTC O2 sensor (heating element) Org/Wht, Battery Voltage with KOEO
A7-FLR1 fuel pump Grn/BLK, Battery Voltage with KOEO
A8-empty A7 and A8 have the same circurt, so they can be the same
A9-IACV IAC valve Blk/Blu, About 10v KOEO on Warm engine
A10-empty
A11- This is EGR Control Solenoid Valve (if the ECU has) Red, N/A
A12-FANC engine coolant temp switch Blu/red, N/A
A13-MIL MIL (check engine light) Blu/wht, N/A
A14-empty
A15-ACC (a/c compressor clutch) Red/Blu, N/A
A16-ALT C alternator Wht/Grn, N/A
A17-IAB IAB Solenoid Pink, N/A
A18- Org/Red, Transmission Control Module (A/T), N/A
A19- White, Intake control solenoid, Battery Voltage with KOEO
A20-PCS EVAP purge control solenoid Red/Grn, N/a
A21-ICM ICM Yel/Grn, Ignition Control Module (ICM) Output signal, About 10V KOEO
A22- *per Sander* Ignitor same as A21
A23-PG1 ground Black, Power ground, less than 1V
A24-PG2 ground same as A23
A25-IGP2 to main relay and to gound for o Yel/blk, Battery positive from Main relay, Battery Voltage with KOEO
A26-LG1 gound Blk/red, less than 1V

B1-IGP2 to pin A25 Yel/Blk, Battery positive from Main relay, Battery Voltage with KOEO
B2-LG2 ground to shields for CYP & TDC Brown/Blk, Less than 1V
B3- Orange, upshift/downshift comparative input, N/A
B4- Pink, upshift/downshift comparative input, N/A
B5-ACS a/c switch Blu/Blk, A/c input, About 5V with KOEO & A/C off; less than 1V KOER with A/C & blower on
B6-empty
B7- Light green, Park/Neutral switch (A/T), Less than 1V in Park or Neutral with KOEO; 5V in Park or neutral with KOER; Battery voltage in all other positions
B8-PSPSW PSP switch Red/Green, Power steering oil pressure switch, 0V KOEO; Battery Voltage KOER While slowly turning steering wheel
B9-STARTER SIGNAL starter signal Blue/red, Battery Voltage in the START position (clutch depressed on M/T models)
B10-VSS vehicle speed sensor Orange, Pulses 0-12V while turning the left front wheel
B11-CYP P CYP -P Orange, CYP sensor input, N/A
B12-CYP M CYP -M White, CYP sensor signal, N/A
B13-TDC P TDC -P Org/Blue, TDC sensor input, N/A
B14-TDC M TDC -M Wht/Blue, TDC sensor signal, N/A
B15-CKP P CKP -P Blu/Green, CKP Sensor input, N/A
B16-CKP M CKP -M Blu/yel, CKP Sensor signal, N/A

D1-VBU Back Up Power Wht/Yel, Battery positive From battery through Fuse Box, Battery Voltage at ALL times
D2-BKSW brake switch Grn/wht, Battery voltage at all times
D3-KS Knock Sensor Red/Blue, N/A
D4-SCS service check connector Brown/Wht, About 5V (M/T); About 11V (A/T)
D5-empty
D6-VTM VTEC pressure switch Light Blue, N/A
D7-TXD/RXD (data link connector) Light Green/Red, N/A
D8-empty
D9-ALT F alternator Wht/Red, Alternator Charging Signal, About 4.5V KOEO; Decreases under Electrical load (Headlights & rear defogger on) At warm idle
D10-ELD electric load detector input Grn/Blk, N/A
D11-TPS TPS Signal Red/Blk, About 0.5V KOEO with throttle fully closed; About 4.5V KOEO with throttle fully open
D12- Wht/Blk, EGR Valve Lift sensor, About 1.2V KOEO
D13-ECT ECT sensor input Yel/Blu, About 5V KOEO (varies with temperature)
D14-PHO2S O2 sensor White, heated 02 sensor Signal, 0.4-0.5V when ignition is turned on; drops to less than 0.1V within 2 minutes
D15-IAT IAT sensor Red/Yel, Intake Air Temperature signal, .05-4.5V KOEO(Varies with temperature)
D16-VREF VREF shows BLANK on my diagram
D17-MAP Map Signal Wht/Blu, About 3V KOEO (Varies with Temperature)
D18- Light Green/Blk, Transmission Control Module (A/T Only), N/A
D19 - Red/Wht, Reference Voltage, About 5V KOEO
D20 - Yel/Wht, Reference Voltage, About 5V KOEO
D21 - Blue/Wht, Sensor ground, Less than 1V
D22 - Green/Wht, Sensor ground, Less than 1V

95vr6man

yea i might need the colors, thank you sooooo much. this car has been sitting for way too long. if you run accross those wires anywhere please post them, but this should be good for now. thanks!