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ECU Pinout

Discussion in 'ECU's, Electronics, and Tuning' started by Kyle21nluvnit, Jul 19, 2007.

  1. Kyle21nluvnit

    Kyle21nluvnit New Member

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    Hey does anyone have an ECU pinout diagram for the 96 accord LX. I found it for the H22A if anyone is interested I just need the corresponding information for the accord. All help is greatly appreciated.

    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)
    Note: some of the pins listed for OBDII don't apply to te 96 and were only added in 97 but the layout is the same.
     
  2. Kyle21nluvnit

    Kyle21nluvnit New Member

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    Hey people I stayed up late last night and went over both wiring diagrams and came up with the conversion for the obd1 h22a into a obd2 accord lx manual. I used the list from above and added the required accord harness pin to the right of the p13 connector pins. I only did what i needed to make it work in my car but it might help someone else.

    OBDI 93-95 H22a to OBD2 96 accord lx

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

    Pin---Color---------Desc.
    A1----brn-----------Injector #1 / A4
    A2----yel-----------Injector #4 / A1
    A3----red1---------Injector #2 /A3
    A4----grn/yel------VTEC Solenoid Valve /A8
    A5----blu-----------Injector #3 /A2
    A6----or/wht-------HO2S heater coil / A6
    A7----grn/blk1-----PGM-FI Main Relay coil /A16
    A8----grn/blk2-----Shorted to A7 / A16
    A9----blk/blu-------IAC Valve / A12
    A10
    A11----red2--------EGR Control Solenoid / A7
    A12----blu/red-----Condenser Fan Relay / A27
    A13----blu/wht-----MIL / C7
    A14
    A15----red/blu-----A/C Clutch Relay / A17
    A16----wht/grn-----Alternator / A19
    A17----pink---------IAB Solenoid Valve
    A18----orn/red-----FAS (A/T)
    A19----wht----------Intake Control Solenoid Valve / A25
    A20----red/grn-----EVAP Purge Control Solenoid / A15
    A21----yel/grn1----ICM / A20
    A22----yel/grn2----Shorted to A21 / A20
    A23----blk1---------GND
    A24----blk2---------GND / A22
    A25----yel/blk------PGM-FI Main Relay (power) / A24
    A26----blk/red------VTEC Pressure Switch (GND) / ANY OPEN SLOT
    B1----yel/blk--------PGM-FI Main Relay (power) / A24
    B2----brn/blk-------GND / A9-A10
    B3----orn1----------AFSA (A/T)
    B4----pnk-----------AFSB (A/T)
    B5----blu/blk--------To A/C Switch / C5
    B6
    B7----lt grn---------ATP PN Gear Posisiton (A/T)
    B8----red/grn-------PSP Switch / C16
    B9----blu/red-------Starter Cut Relay / C6
    B10---orn2----------VSS / C18
    B11---orn3----------CYP / C4
    B12---wht-----------CYP / C14
    B13---orn/blu-------TDC / C3
    B14---wht/blu-------TDC / C13
    B15---blu/grn-------CKP / C2
    B16--blu/yel--------CKP / C12
    D1----wht/yel-------Battery / C10
    D2----grn/wht1-----Brake Switch / D5
    D3----red/blu-------KS
    D4----brn/wht------SCS / C7
    D5
    D6----lt blu or lt grn-VTEC Pressure Switch / ANY OPEN SLOT
    D7----lt grn/red----Data Link Connector / C8
    D8
    D9----wht/red------ALT / C17
    D10---grn/blk------ELD / D16
    D11--red/blk-------TP Sensor / D1
    D12---wht/blk------EGR Valve Lift Sensor / D9
    D13---yel/blu-------ECT Sensor / D2
    D14---wht----------HO2S Sense / D7
    D15---red/yel------IAT Sensor / D8
    D16
    D17---wht/blu------MAP Sensor / D4
    D18---lt grn/blk----VREF (A/T)
    D19---red/wht------EGR Valve Lift Sensor
    D20---yel/wht------TP Sensor / D10
    D21---blu/wht------MAP Sensor / D3
    D22---grn/wht2----TP Sensor
     
  3. Black Widow g2

    Black Widow g2 *princess*

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    So you can do it without having to use the conversion harness? I just learned something! Thank you for that info... if I notice anyone else doing a similar swap, I will point them your way!
     
  4. Kyle21nluvnit

    Kyle21nluvnit New Member

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    you can do it without the conversion kit but you would still have to remove the ecu connector from the prelude harness and repin from the designated pins on the right to the pins on the left. its still much more work than the conversion harness but if your capable of doing it, why not save some money?
     
  5. Kyle21nluvnit

    Kyle21nluvnit New Member

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    Hey just want to let everyone know that I got the OBD2a to OBD1 conversion harness and vtec subharness from rywire.com, above is the directions to make your own conversion harness I promise its all right. But the rywire harness was amazing, If I had more time on this I would have done everything myself but if your going to buy a harness i strongly suggest getting it from rywire.
     
  6. Kyle21nluvnit

    Kyle21nluvnit New Member

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