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96 prelude vtec swap wiring?? HELP PLEASE

 
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Old 08-29-2010, 01:33 AM
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96 prelude vtec swap wiring?? HELP PLEASE

just dropped in new h22a in my 96' (obd2, H23a1) prelude, using obd1 ecu. now time to wire the vtec. can someone please walk me through this? i once heard the 96 ludes were all wired for vtec and the wires needed were just tucked under the dash??? i looked around a little and didnt see them. thanks
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Old 08-29-2010, 05:07 PM
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Re: 96 prelude vtec swap wiring?? HELP PLEASE

H22A into a prelude Si ..all your info is here! - Honda Forum : Honda and Acura Car Forums


all your info should be there.
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Old 08-29-2010, 06:26 PM
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Re: 96 prelude vtec swap wiring?? HELP PLEASE

thanks some good info there, but not what im looking for, its a little diffrent for a 96 prelude being its OBD2 unlike all other 4th gens are OBD1. so basicly i need the vtec pinouts for an OBD2 4th gen prelude. or if the wires are there? and where?
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Old 08-29-2010, 06:40 PM
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Re: 96 prelude vtec swap wiring?? HELP PLEASE

it should be there i think. i dont see OBD2 being any different than OBD1. you are only working with 2 wires. one wire you need to run from the vtec soenoid to the ecu and the other is either looped (or something, i forget) to bypass it, or ran to the vtec pressure switch (what would be bypassed) its a stupid easy wiring procedure.


also i cut the Vtec solenoid wire and oil pressure switch wires at the end of myJDM harness..then stripped them out so i would have a long length of wire attached to these plugs..you will need to use these plugs...the Vtec solenoid pins are A4 and A26..A4 is green wire with a yellow stripe..you count pin locations as follows there are 2 rows top and bottom, start in the far left on top, that is A1, right below that is A2, go up and to the right A3, down again A4..so A4 is the second wire on the bottom...the pins for the Oil pressure switch are D6 and D22..there are only the plugs..the first one is A the scond one is B and the third is D...D6 should be a light blue wire..you can check where your ecu is for these wires, in some of the early models..ie 92-93..the chassis is wired for vtec..mine was...also in the engine bay..if you look at the passenger side strut tower...look in front of that like right behind where your intake tube would pass ( it passes between the shock tower and the battery) there was two connectors monted there..one had two wires in it...both going in and coming out..the other was a single wire coming in from the car...but nohing coming out to the engine..that is the Vtec solenoid wire..again it is Green with a yellow stripe...the oil pressure switch wire is located in that little cluster of three plugs..again look for the ligt blue wire running from the inside of the car...but with no wire on the opposite side of the plug going to the engine....thats where i hooked up my wires..if your car is not prewired as such you will have to run these 2 wires into the car through the firewall and pin into your ecu


if i find some pics ill post here. i dont remember where i got the info for my swap.
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Old 08-29-2010, 07:08 PM
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Re: 96 prelude vtec swap wiring?? HELP PLEASE

thanks, i do think that the pinouts are different between them because i have to buy the obd2 to obd1 conversion harness (wires look pretty crossed up). i guess i could wait till i get the ecu and harness (2 weeks out) run the wires to the pinouts like your saying...id like it it be a little cleaner though, running vtec wires like factory and threw the conversion harness. with OBD2 pinouts i could see if the wires were there already.= no getto wiring. not in front of the car now but isnt the pressure switch 2 wires?
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Old 03-14-2011, 02:54 PM
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Re: 96 prelude vtec swap wiring?? HELP PLEASE

the vtec solenoid has 1 wire that is green with a yellow stripe. the oil pressure switch should have a green plug and that has two pinouts for two wires. one is blue and the other is black. the black can be engine/body grounded.
some ludes are wired for vtec. look on the right shock mount tower and two wires should be there, the green with yellow stripe and blue. once you connect the vtec solenoid and oil pressure switch to those and ground the black wire you should be good to go.
assuming you are using a p13 ecu and the obd2a to obd1 conversion harness.
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Old 03-14-2011, 03:16 PM
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Re: 96 prelude vtec swap wiring?? HELP PLEASE

Here are the obd1 and obd2 pinouts.

Heres pinouts




OBDI 93-95 H22a

Layout
A1->A25--B1->B15--Blank--D1->D21
A2->A26--B2->B16--Blank--D2->D22


Pin---Color---------Desc.
A1----brn-----------Injector #1
A2----yel-----------Injector #4
A3----red1---------Injector #2
A4----grn/yel------VTEC Solenoid Valve
A5----blu-----------Injector #3
A6----or/wht-------HO2S heater coil
A7----grn/blk1-----PGM-FI Main Relay coil
A8----grn/blk2-----Shorted to A7
A9----blk/blu-------IAC Valve
A10
A11----red2--------EGR Control Solenoid
A12----blu/red-----Condenser Fan Relay
A13----blu/wht-----MIL
A14
A15----red/blu-----A/C Clutch Relay
A16----wht/grn-----Alternator
A17----pink---------IAB Solenoid Valve
A18----orn/red-----FAS (A/T)
A19----wht----------Intake Control Solenoid Valve
A20----red/grn-----EVAP Purge Control Solenoid
A21----yel/grn1----ICM
A22----yel/grn2----Shorted to A21
A23----blk1---------GND
A24----blk2---------GND
A25----yel/blk------PGM-FI Main Relay (power)
A26----blk/red------VTEC Pressure Switch (GND)

B1----yel/blk--------PGM-FI Main Relay (power)
B2----brn/blk-------GND
B3----orn1----------AFSA (A/T)
B4----pnk-----------AFSB (A/T)
B5----blu/blk--------To A/C Switch
B6
B7----lt grn---------ATP PN Gear Posisiton (A/T)
B8----red/grn-------PSP Switch
B9----blu/red-------Starter Cut Relay
B10---orn2----------VSS
B11---orn3----------CYP
B12---wht-----------CYP
B13---orn/blu-------TDC
B14---wht/blu-------TDC
B15---blu/grn-------CKP
B16--blu/yel--------CKP

D1----wht/yel-------Battery
D2----grn/wht1-----Brake Switch
D3----red/blu-------KS
D4----brn/wht------SCS
D5
D6----lt blu or lt grn-VTEC Pressure Switch
D7----lt grn/red----Data Link Connector
D8
D9----wht/red------ALT
D10---grn/blk------ELD
D11--red/blk-------TP Sensor
D12---wht/blk------EGR Valve Lift Sensor
D13---yel/blu-------ECT Sensor
D14---wht----------HO2S Sense
D15---red/yel------IAT Sensor
D16
D17---wht/blu------MAP Sensor
D18---lt grn/blk----VREF (A/T)
D19---red/wht------EGR Valve Lift Sensor
D20---yel/wht------TP Sensor
D21---blu/wht------MAP Sensor
D22---grn/wht2----TP Sensor


OBDII H22a 96+

Layout
A1->A11----Blank--C1->C10---D1->D5
A12->A24--Blank--C11->C22--D6->D12
A25->A32--Blank--C23->C31--D13->D16

Pin---Color ---------Desc.
A1----yel------------Injector #4
A2----blu------------Injector #3
A3----red------------Injector #2
A4----brn------------Injector #1
A5----orn/blu-------Secondary O2 heater
A6----blk/wht-------HO2S heater
A7----orn------------EGR Control Solenoid Valve
A8----grn/yel-------VTEC Solenoid Valve
A9----brn/blk-------GND (dig)
A10---blk------------GND (power)
A11---yel/blk-------PGM-FI Power
A12---blk/blu-------Idle Air Control Valve
A13
A14
A15---red/yel-------Evap Purge Control Solenoid Valve
A16---grn/orn-------Fuel Pump Relay
A17---pnk/blu-------A/C Clutch Relay
A18---gry/red-------MIL
A19---wht/grn-------ALT
A20---yel/grn--------ICM
A21
A22---brn/blk--------GND (dig)
A23---blk------------GND (power)
A24---yel/blk--------PGM-FI Power
A25---wht-----------Intake Control Solenoid Valve
A26---red/blu-------IAB Control Solenoid Valve
A27---grn-----------Radiator Fan Relay
A28---grn/wht------EVAP Bypass Solenoid Valve
A29---orn/grn------Evap control cansiter vent shut valve
A30
A31-
A32-

C1---lt grn/blk------Ref. Voltage for ATTS or TCM (not used)
C2---blu------------CKP Detect
C3---grn------------TDCP Detect
C4---yel------------CKP Detect
C5---blu/orn-------A/C Switch Signal Input
C6---blu/red-------Starter Switch Input
C7---red/wht-------SCS
C8---lt grn ---------K Line (scan tool)
C9-- -
C10---wht/yel------ECM Backup Power
C11-- -
C12---wht----------CKP GND
C13---red----------TDC M Side
C14---blk----------CYP M Side
C15---blu/blk------VTEC Pressure Switch
C16---grn----------P/S Pressure Switch
C17---wht/grn-----ALT Detect signal
C18---blu/wht------VSS Signal
C19 -
C20 - -
C21 - -
C22---brn/yel------IMO Immobilizer Code Signal
C23- -
C24 - -
C25 - -
C26 - -
C27 - -
C28 - -
C29 - -

C30 - -
C31 - -

D1----red/blk----------TPS Detect
D2----red/wht---------ECT Engine Coolant Temp. Detect
D3----red/grn---------MAP Detect
D4----yel/red----------Vcc1 (Power for MAP)
D5----wht/blk----------BKSW Brake Switch Detect
D6----red/blu----------KS (Knock Sensor Detect)
D7----wht--------------HO2S Detect
D8----red/yel----------IAT Intake Air Temp Detect
D9----wht/blk----------EGR Valve Lift Sensor
D10---yel/blu----------Vcc2 (Provides Sensor Voltage)
D11---grn/blk----------SG2 (Sensor Ground)
D12---grn/wht---------SG1 (Sensor Ground)
D13- -
D14---wht/red---------SHO2S (Secondary O2 Sensor Detect)
D15---wht/blu---------PTANK (Detects fuel tank pressure signal)
D16---grn/red---------EL (Detects ELD Signal)
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