2.1.1 POINTS

Connect this wire to the points input wire on your aftermarket ignition system, if you are using one. If you are using the FAST™ eDist, the POINTS wire should be connected to the points input of the eDist, located at pin C2 of the eDist connector.

2.1.2 FP-A/FAN-B/ESC-C

This connector contains the fuel pump (FP-A), fan (FAN-B), and knock sensor (ESC-C) wires. The -A, -B, and -C correlate to the pin that each function is housed on. The fuel pump wire is on pin A of the connector. Connect this wire to the negative side of a relay used to power your fuel pump (relay not included). This output switches to ground when active.  Use this wire to activate the negative side of a relay, and use the relay to provide power to the fuel pump.  Do not connect this wire directly to the fuel pump or to a 12 volt source or ECU damage will occur! The fan wire is housed on pin B. Connect this wire to the negative side of a relay used to power your fan (relay not included). This output switches to ground when active.  Use this wire to activate the negative side of a relay, and use the relay to provide power to the fan.   Do not connect this wire directly to the fan or to a 12 volt source or ECU damage will occur! The knock sensor wire is housed on pin C. Connect this wire to a GM-type ESC (knock sensor) module, typically located on the firewall or inner fender. The knock sensor used should be a GM-type knock sensor. Use of the knock sensor is not recommended for applications where high-octane fuel is used. An option harness for fuel pump and fan control with relays included (part # 30-1406) is available from FAST™.

2.1.3 CALPORT

Connect this plug to the supplied RS-232 communications cable for connection to your computer’s serial port. If the supplied cable is not long enough for your needs, a 40-foot RS-232 cable (part # 30-8021) is available. If your computer does not have a serial port, a USB to serial port adapter (part # 30-7044) is available.

2.1.4 12V+ SWITCH

Connect to a +12V source that is active when the key is in the START and RUN position. This is the wire that actually turns the ECU on, so it is critical that it receives 12 volts when the key is in the ON position and in the START position.

2.1.5 +12V SWITCH H.E.

If you are using a hall effect cam and/or crank sensor, this will need to be connected to a +12V source that is active when the key is in the START and RUN position. The other end of this wire, which is found in the bundle next to your CAM HALL EFFECT connector, needs to be connected to the +12V wire on your sensor(s). If you are not using a hall effect-type sensor this will not need to be connected.

2.1.6 GND GND

stands for ground, and there are two of these in the main harness. One is bound with the Cam Hall Effect connector and one is bound with the CRANK connector. These ground connections should be connected to a clean engine ground. Be sure to remove all paint and corrosion from the point to which this ground is attached.

2.1.7 BAT+ and BAT-

The battery wires should only be connected to the battery terminals, not to an intermediate power source or ground on the chassis or engine. This will ensure maximum noise rejection from ground loops and conducted noise. Connect these only after all other connections are made.

2.1.8 WIDEBAND O2

Connect this plug to the supplied oxygen sensor using the provided extension harness. The oxygen sensor should be located in an exhaust pipe where the sensor will be able to get a good "average" reading from at least one entire bank of cylinders. If you have a turbocharged motor, put the sensor in the downpipe rather than in a collector.

2.1.9 H2O

Connect this plug to your coolant temperature sensor. Coolant temperature sensors are available separately or as part of complete sensor kits from FAST™. Pin A – H2O signal, white (C23) Pin B – H2O return, black (tied to ground)

2.1.10 AIR

Connect this plug to a your air temperature sensor. For speed/density applications, this sensor should be mounted in a position where it samples the charge air in the manifold. For Alpha-N applications, mount this sensor to sample ambient air temperature, as in the hood scoop or in the air cleaner. Air temperature sensors are available separately or as part of complete sensor kits from FAST™. Pin A – Air signal, white/pink (C22) Pin B – Air return, black (tied to ground)

2.1.11 MAP

Connect this plug to a GM-type Manifold Absolute Pressure sensor, such as FAST™ part # 30-7007 for normally aspirated applications. For blown or turbocharged applications, use a 2 bar MAP sensor (part # 30-7008) for up to 15 PSI of boost, a 3 bar MAP sensor (part # 30-7009) for up to 30 PSI of boost, a 4 bar MAP sensor for up to 45 PSI of boost, or a 5 bar MAP sensor (part # 30-7047) for up to 60 PSI of boost. For speed/density applications, this sensor must be connected to an intake manifold vacuum port. For Alpha-N applications, mount this sensor to sample ambient air pressure, as in the hood scoop or in the air cleaner. Manifold absolute pressure sensors are available separately or as part of complete sensor kits from FAST™.

2.1.12 TPS

Connect this plug to the throttle position sensor located on the throttle body. Throttle position sensors are available separately or as part of complete sensor kits from FAST™.

2.1.13 IAC

Connect this plug to the Idle Air Control motor. Idle air control motors are available separately or as part of complete sensor kits from FAST™. For blown, turbocharged, or other special applications, use Remote Idle Air Control unit, part # 30-7016.

2.1.14 CAM HALL EFFECT

This connector doubles not only as the cam sensor input, but also as the overall ignition adapter harness connector. FAST™ ignition adapter harnesses will plug this connector directly into your ignition source without the need for cutting or splicing existing connections. A camshaft sensor input is only required for sequential systems with individual cylinder control.  It is recommended for all sequential systems, however.  If your engine does not have a camshaft sensor and one is required, contact your FAST™ dealer for assistance. Unless specifically noted elsewhere, bank-to-bank configurations do not require a camshaft sensor.

2.1.15 CRANK

Connect this plug to an inductive pickup type crankshaft sensor (typically a inductive pickup crank trigger or distributor), and connect the ring terminal to a ground point such as the engine block.  The following chart shows the wire colors to connect for some common crank triggers.  Virtually any crank trigger system should be compatible, so long as it is properly connected. The FAST™ IPU ignition adapter harness will supply you with the MSD style connectors.  

NOTE: If you are not using a FAST™ ignition adapter harness, the ECU will accept either discrete/Hall Effect or inductive type signals as its crank and cam inputs. There is a separate ECU pin for each type.

The inductive crank input is ECU pin A4. It can be found in the CRANK connector on the harness as pin A. The discrete/Hall Effect crank input is ECU pin A8. It can be found in the CAM HALL EFFECT/HEI connector on the harness as pin F. Whichever input is not being used should be connected to ground. This will prevent the unused input from floating and falsely triggering the ECU.

The inductive cam input is ECU pin A3. The discrete/Hall Effect cam input is ECU pin A7. Both can be found in the CAM HALL EFFECT/HEI connector on the harness as pin A and pin C respectively. Whichever input is not being used (or both inputs if no cam sensor is being used) should be connected to ground. This will prevent the unused inputs from floating and falsely triggering the ECU.

2.1.16 INJECTOR

This plug will be connected to your FAST™ fuel injector harness. FAST™ has fuel injector harnesses available for all popular engine applications.

If you need to reconfigure your injector harness, refer to the following chart. The 10-pin connector on the end of the injector harness can easily be reconfigured to work with many different engine types. Terminals A through H on the connector are designated for each of the eight injector connectors on the harness and can be reconfigured as per the following chart. Terminals J and K should not be changed under any circumstances.

2.1.17 POWAD

This connector contains the power adder function wires.  There are 6 wires in this connector that control 4 completely separate stages as well as the power adder enable wire and a new power adder hold function.  A Power Adder option harness (part # 30-1400) is available from FAST™.

The pink wire on pin E is the enable wire.  Connecting this wire to +12V enables the power adder system.  This is typically connected to a toggle switch.

The pink wire on pin F is the power adder hold enable wire.  Connecting this wire to ground enables the power adder hold function.

The blue/white wire is the control output for the first stage.  This output switches to ground when active.  Use this wire to activate the negative side of a relay, and use the relay to provide power to your power adder control source.  

The blue/yellow wire is the control output for the second stage.  This output switches to ground when active.  Use this wire to activate the negative side of a relay, and use the relay to provide power to your power adder control source.

The blue/green wire is the control output for the third stage.  This output switches to ground when active.  Use this wire to activate the negative side of a relay, and use the relay to provide power to your power adder control source.  

The blue/orange wire is the control output for the fourth stage.  This output switches to ground when active.  Use this wire to activate the negative side of a relay, and use the relay to provide power to your power adder control source.   

Do not connect the blue (/white/yellow/green/orange) wires directly to a 12 volt source or ECU damage will occur!

2.1.18 DIAG

This connector is for your diagnostic and flash functions. A Flash Kit option harness (part # 30-1401) is available from FAST™.

2.1.19 ANALOG

This connector houses the 8 analog inputs that can be used for things such as a fuel pressure sensor, oil pressure sensor, EGT probes, etc.  An Analog Auxiliary input harness kit (part # 30-1402) is available from FAST™.

2.1.20 SHAFT

This connector is for the auxiliary shaft sensor input circuit. The FAST™ VSS and auxiliary shaft harness kit (part # 30-1403) will supply you with the harness, sensor, and magnets to monitor things such as driveshaft speed and torque converter/clutch slippage.

2.1.21 VSS

This connector is for vehicle speed sensor input. If your vehicle has a vehicle speed sensor an option harness kit (part # 30-1403) is available from FAST™.