Fuel Injection Harness pinout locations

Gotta love that wiring . . .
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BammBamm
Posts: 240
Joined: Fri Jul 31, 2015 1:23 am
Your car is a: 1982 Pininfarina Spider
Location: az

Fuel Injection Harness pinout locations

Post by BammBamm »

I rebuilt my harness with all new connectors and I didnt take enough pictures. While I have created a excel matrix of all the connectors and connections, (and matched them to the wiring diagram) but Im missing a couple of details. The large yellow wire with a shield wire goes to the coil from pin 1 of ECM connector. I want to verify it goes to the coil +. Next there is a separate white wire labeled "22" going to pinout 22 on the ECM plug, where does that go? I know it goes to the coil but not sure positive or negative coil terminal. Also I couldnt find any wire that ties to pinout 12 on the ECM connector nor in the wiring diagram. Please assist.
Here is my matrix for the connectors

ECU Connector Cooresponding Connector
Pin 1 Ignition Coil +
Pin 2 Throttle Position Sensor - Pin 1
Pin 3 Throttle Position Sensor - Pin 3
Pin 4 Relay 86, Cold Start Pin 2, Thermo Pin 2
Pin 5 Gnd Pin 2, Coolant Temp Pin 2, Ign Coil Shield
Pin 6 Mass Airflow Sensor Pin 3
Pin 7 Mass Airflow Sensor Pin 6
Pin 8 Mass Airflow Sensor Pin 5
Pin 9 Mass Airflow Sensor Pin 4
Pin 10 Mass Airflow Sensor Pin 1, Ign Relay 88a
Pin 11 NA
Pin 12
Pin 13 Coolant Temp Pin 1
Pin 14 Fuel Injector #4 Pin 2
Pin 15 Fuel Injector #1 Pin 2
Pin 16 Ground #1 Injectors
Pin 17 Ground #1 Injectors
Pin 18 Throttle Position Sensor Pin 2
Pin 19 NA
Pin 20 Mass Airflow Sensor Pin 2, 86b Pin 1
Pin 21 NA
Pin 22 White 22
Pin 23 O2 Sheild
Pin 24 O2 Sensor
Pin 25 NA
Pin 26 NA
Pin 27 Mass Airflow Sensor Pin 7
Pin 28 Fuel Injector Relay 85 Pin 3
Pin 29 Fuel Injector Relay 88e Pin 5
Pin 30 NA
Pin 31 NA
Pin 32 Fuel Injector #3 Pin 2
Pin 33 Fuel Injector #2 Pin 2
Pin 34 Bypass Pin 2
Pin 35 NA


Device Connector Connector Pin Out ECU Connector Pinout
Throttle Position Sensor 1,2,3 2,18,3
Mass Airflow Sensor 1,2,3,4,5,6,7 10,20,6,9,8,7,27
Ground #1 16,17
Ground #2 5
Coolant Temp Sensor 1,2 13,5
O2 Sensor 24
Ignition Coil + 1
White #22 22
Cold Start Injector 1,2 46, 4/47/Relay 86
Thermo Switch 1,2 45,46
Fuel Injector Relay 1,2,3,4,5,6,7,8,9 86b,88c, , ,88a,88b,86
Bypass Valve 1,2 88c,34
Fuel Injector #4 1,2 88b, 14
Fuel Injector #3 1,2 88b, 32
Fuel Injector #2 1,2 88e/5, 33
Fuel Injector #1 1,2 88e/5, 15
Bill Woodbury
Design Engineer
Zero Shock Seating
1982 Spider 2000
spider2081
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Posts: 3015
Joined: Fri Jan 27, 2006 11:45 pm
Your car is a: 1981 Spider 2000
Location: Wallingford,CT

Re: Fuel Injection Harness pinout locations

Post by spider2081 »

I think the coil + has a pink wire from the ignition switch connector C 31, a red wire to the ignition control module and a black wire to the radio filter capacitor.
The D terminal of the coil has the yellow shielded wire from the ECU pin 1, The black wire to the ECU and the brown/white wire to the tachometer.
The white 22 wire is not used. I'm not sure of its original purpose. Some people think it provides a means of measuring the fuel mixture.
Hope this helps
BammBamm
Posts: 240
Joined: Fri Jul 31, 2015 1:23 am
Your car is a: 1982 Pininfarina Spider
Location: az

Re: Fuel Injection Harness pinout locations

Post by BammBamm »

Spider2081. I’m a little confused. I know the pink comes from the ignition switch to coil +. The brown and white from the tach to coil - (I think). I have a ground wire from the engine block to coil -. That leaves me the white 22 And the yellow shielded. You say the yellow goes to coil D. What is coil D? I only have coil + & -. Please advise.
Bill Woodbury
Design Engineer
Zero Shock Seating
1982 Spider 2000
spider2081
Patron 2024
Patron 2024
Posts: 3015
Joined: Fri Jan 27, 2006 11:45 pm
Your car is a: 1981 Spider 2000
Location: Wallingford,CT

Re: Fuel Injection Harness pinout locations

Post by spider2081 »

You say the yellow goes to coil D. What is coil D? I only have coil + & -. Please advise.
The Coil "D" terminal is the same a a coil's - terminal. I think the original Magneti Marelli coils used the letter "D" to identify the - terminal. The wire diagram shows a + and a D on the coil. If you coil has a - symbol on it I think its an aftermarket coil and the yellow shielded wire center conductor connects to that coil terminal. The shield is left unconnected (floating) about 1/2 inch from the center conductors terminal.

The ground wire that connects to the cam box connects to the coil's heat sink bracket not to either of the coils low voltage terminals.
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