13
Wire List
Ion Pump –
Connection to internal component of wideband oxygen sensor. Must be
properly connected for sensor to operate.
Sense Cell (-)
- Connection to internal component of wideband oxygen sensor.
Must be properly connected for sensor to operate.
Heater (-)
– Controls the internal heating element inside the wideband oxygen
sensor. Must be properly connected for sensor to operate.
Aux. Input 1
– Auxiliary input used for triggering data log function record session.
Triggered by applying an electrical ground to the wire.
Aux. Input 2
– Programmable Input for Single and Dual Channel models with
firmware versions 2.0 and higher. Triggered by applying an electrical ground to the
wire.
Aux. Input 3
– Programmable Input for Dual Channel models. Triggered by
applying an electrical ground to the wire.
Gauge Output
– Connects to signal input of 77063S gauge kit. Provides a voltage
from 8 to 18 volts, with the voltage being equal to the measured air/fuel ratio (12.8
volts = 12.8:1 a/f ratio). This output must be connected to a self-powered digital
gauge or voltmeter only – it is not compatible with analog gauges.
0-5V Out
– This is the main voltage output from the controller. A 0 volt output
represents the richest possible reading from the controller, and 5 volts represents
the leanest possible reading. The output can be configured to represent an average
of two sensor readings in dual sensor applications, or it can be configured to
represent the reading from a single sensor. Refer to the DIP switch chart in this
manual for information on configuring this option.
Sense Cell (+)
- Connection to internal component of wideband oxygen sensor.
Must be properly connected for sensor to operate.
Calibration Resistor (+)
– Connects to one side of the built-in calibration resistor
inside the wideband oxygen sensor connector.
It is critical that the original calibration resistor included with the sensor remains with
its associated sensor. This component is installed in the sensor by the sensor
manufacturer to calibrate the sensor and ensure accuracy. It is not installed by
Accel DFI. Tampering with this calibration resistor may result in sensor inaccuracy,
poor engine performance, or engine damage!
RPM Input
– Receives information on engine speed for recording and reviewing
air/fuel ratio information as a function of engine speed. Input signal specifies 5V or
12V square wave form. Typical connections are from a CD spark enhancer module
or Distributorless ignition module with Tachometer output. Otherwise connect to a
distributor with either a 5V or 12V ignition module. Consult your owner’s manual for
more information. NOTE: DO NOT connect the RPM Input to the Coil (-) negative
lead when using a Capacitive Discharge or CD Ignition system. Severe damage will
occur to the electronic control unit.
