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Wiring help needed

I have recently bought a vehicle dynamics processor for the zed and it says in the installation manual that 1 of the wires has to be connected to the vehicles speed detection circuit. :confused:

can one of you gurus please tell me where i would find this circuit as I am totally lost!

 

Cheers chaps (and chapesses)

Scotty

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    300zxecu.jpg

     

     

    ecu in passenger footwell, under piece of wood

    [sIGPIC][/sIGPIC]

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    1990-1995 Nissan 300ZX Pin numbers for the whole connector

    1 Ignition 1 Coil #1

    2 Ignition 2 Coil #2

    3 Ignition 3 Coil #3

    4 AAC Valve

    5 A/T Control Unit PW

    6 Cooling Fan Relay (300ZX Turbo Only)

    7 Tachometer

    8 AIV Solenoid (90-92 300ZX)

    9 Air Conditioner Relay

    10 ECM Ground

    11 Ignition 4 Coil #1

    12 Ignition 5 Coil #2

    13 Ignition 6 Coil #3

    14 A/T Control Unit

    15 A/T Control Unit

    16 ECM Self-Shutoff Power Source

    17 Data Link Connector

    18 Fuel Pump Relay

    19 Cooling Fan Relay

    20 ECM Ground

    21 Diagnostics Receive Data

    22 Diagnostics Transmit Data Switch

    23 Knock Sensor

    24

    25 Wastegate Solenoids (Turbo Only)

    26 Mass Air Flow Sensor Ground

    27 Mass Air Flow Sensor MAF

    28 Engine Coolant Temperature Sensor

    29 Right Side Heated Oxygen Sensor

    30 Sensor Ground

    31 Diagnostics Clock EGT

    32 Malfunction Indicator Lamp

    33 FICD Solenoid

    34 Power Steering Oil Pressure

    35 Fuel Pump Voltage Control (300ZX Turbo Only)

    36 Fuel Temperature Sensor

    37 --- Spare Temp Input Avail, 0-5 Volt

    38 Throttle Position Sensor TPS

    39 EGR Temperature Sensor

    40

    41 Camshaft Position Reference Signal

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