im converting my brothers crx from obd0 to obd1.he is using a p28 ecu.he gave the plugs for it that he got from a salvaged car lot. the problem i have is i have extra wires that i dont know what there for. every single wiring diagrams i look these wires dont have any function . these are the wires A-17 green B-3 B-4 B-7 also green, D-7 light blue D-15 yellow red D-18 white red. please H-t wiring gurus i need your help identifiyng what these wires are for thanks.

 

any1 now

 

D-15 is red/yellow and its Intake temperature and it goes t o C-5 on obd-0
the rest i dont have.dont know sorry man
on P30 ECU those numbers are empty except this one. (those numbers that you listed)

 

A plug (1992-1995 plug)

A1 (A1) ----> A1 (A1) Injector 1
brn --------> brn
A2 (A3) ----> A2 (A3) Injector 2
red --------> red
A3 (A5) ----> A3 (A5) Injector 3
lt. blu ----> lt. blu
A4 (A7) ----> A14 (A12) Main Relay
grn/yel ----> grn/blk
A5 (A9) ----> A5 (A11) EACV
grn/wht ----> blu/yel
A7 (A13) ---> B13 (B6) Check Engine Light
grn/org ----> grn/org
A8 (A15) ---> B2 (B3) A/C Clutch Relay
blk/red ----> yel
A11 (A21) --> B8 (B15) Ignition Unit Signal
red/grn ----> wht
A12 (A23) --> A9 (A2) Main Relay
blk --------> blk
A13 (A25) --> A6 (A13) Main Relay
yel/blk ----> yel/blk
A14 (A2) ---> A4 (A7) Injector 4
yel --------> yel
A15 (A4) ---> (VTEC) grn/yel at on the engine harness, your choice elsewhere
org/wht ----> (your choice)
A16 (A6) ---> (O2S heater) to orn/blk on engine harness, your choice elsewhere
org/blk ----> (your choice)
A17 (A8) ---> A15 (A14) Main Relay
grn/yel ----> grn/blk
A19 (A12) --> B12 (B4) Radiator Fan Relay
yel/grn ----> yel/grn
A21 (A16) --> B3 (B5) Alternator
wht/yel ----> wht/yel
A23 (A20) --> A11 (A6) Purge Control Solenoid
red --------> grn
A24 (A22) --> B9 (B17) Ignitor Unit
red/grn --------> wht
A25 (A24) --> A10 (A4) Ground
blk --------> blk
A26 (A26) --> A17 (A18) “Multiground”
blk/red ----> blk/red

B Plug (1992-1995 plug)

B1 (B1) ----> A7 (A15) Main Relay
yel/blk ----> yel/blk
B3 (B5) ----> B14 (B8) A/C Switch
blu/red ----> blu/red
B5 (B9) ----> B7 (B13) Main Relay
blu/wht ----> blu/wht
B6 (B11) ---> B15 (B10) **
org --------> org
B7 (B13) ---> C2 (C3) **
org/blu ----> org/blu
B8 (B15) ---> C1 (C1) **
blu/grn ----> blu/grn
B9 (B2) ----> A16 (A16) Multiground
brn/blk ----> brn/blk
B13 (B10) --> B18 (B16) Vehicle Speed Sensor
yel/blu ----> yel/red
B14 (B12) --> B16 (B12) **
wht --------> wht
B15 (B14) --> C10 (C4) **
wht/blu ----> wht/blu
B16 (B16) --> C9 (C2) **
blu/yel ----> blu/yel

D Plug (1992-1995 Plug - NO C plug on 1992-1995 Plugs)

D1 (D1) ----> B1 (B1) Hazard
wht/blu ----> wht/grn
D2 (D3) ----> (Knock Sensor) B-series engines only!
red/blu ----> (your choice shielded wire)
D5 (D9) ----> B17 (B14) Alternator
pnk --------> blu
D6 (D11) ---> C4 (C7) Throttle Position Sensor
red/blu(or pastel green) ----> red/blu
D7 (D13) ---> C11 (C6) Coolant Temperature Sensor
red/wht ----> red/wht
D8 (D15) ---> C3 (C5) Intake temperature
red/yel ----> red/yel
D9 (D17) ---> C6 (C11) Map Sensor
wht --------> wht
D10 (D19) --> C8 (C15) Map Sensor
yel/grn ----> yel/red
D11 (D21) --> C15 (C14) Map Sensor
grn/blu ----> grn/wht
D12 (D2) ---> C13 (C10) Brake Switch
grn/wht ----> grn/wht
D13 (D4) ---> B20 (B20) Service Connector
brn --------> brn
D14 (D6) ---> (VTEC Pressure Switch) Blue/blk wire in engine harness
org/blu ----> (your choice)
D16 (D10) --> B10 (B19) Electronic Load Sensor
grn/red ----> grn/red
D18 (D14) --> C16 (C16) O2 Sensor
wht --------> wht
D21 (D20) --> C7 (C13) Throttle Position Sensor
yel/wht ----> yel/wht
D22 (D22) --> C14 (C12) Coolant temp/TPS/O2/etc…ground kind of thing
grn/wht ----> grn/wht

 

<U>A17, B3, B4, & B7</U> all have to do with automatic transmissions.

<U>D-18</U> is for an econo shift light which the OBD0 doesn't have

<U>D-7</U> is for the data link connector (you don't need this wire)

If i were you I would just remove those pins and save them for later. Who knows when you may need them? They're nice to have handy. I ran into these same extra wires when i was doing my conversion.

<U>D-15</U> is for the IAT, it connects to C5 on the OBD0 connector, which someone mentioned earlier

Hope this helps.

Kris