Input Signal Wiring
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wires. These have the following functions.
·
Single Wire Sensor - The wire is the signal output and should be connected directly to
an Analogue Voltage Input.
·
Two Wire Sensor - One wire for the signal output (to Analogue Voltage Input). The
other is the signal ground (Signal Ground (green)).
·
Three Wire Sensor (Heated) - One wire for the signal output (to Analogue Voltage
Input). Two wires for the heater. One of the heater wires should be connected to an
ignition switched 12V supply. The other heater wire can be connected to a convenient
ground (or controlled using an auxiliary output). Heater polarity is not important.
·
Four Wire Sensor (Heated) - As for three wire sensor, but with an extra wire for the
signal ground which must be connected to Sensor Ground (green).
Recommended Narrow Band Oxygen Sensor
The recommended narrow-band EGO sensor is a Bosch 3-wire lead-tolerant unit with Part
Number 0 258 003 070. As with other Bosch 3 wire sensors, the wire colours are:
2 white wires
=
heater (18 watts)
1 black wire
=
output signal
7.7
Wide Band Oxygen Sensor
Wideband exhaust gas oxygen (EGO) sensors are able to accurately measure air/fuel ratios
over a very wide range from very lean to very rich. This makes these devices very suitable
for tuning purposes.
A wideband sensor can be used to run Closed Loop Lambda (CLL) for improved economy
and emission. A wideband sensor is a necessity if Quick Tune (refer to the PCLink Tuning
Software online help) is going to be used to tune the engine.
Any Analogue Volt channel may be used to accept the signal from a wide-band EGO sensor
controller. Note that G4 ECU's cannot accept the signal directly from a wide-band sensor.
A wide-band controller works as an interface between a wide-band O2 sensor and the ECU.
The controller should connect directly to the sensor and output a voltage between 0 and 5V.
The sensor calibration (the voltages that correspond to given air/fuel ratios) must be known
and this information must be entered into the ECU via PCLink Tuning Software.
The recommended Wideband Oxygen Sensor controller is the Innovate LC-1 Wide-Band
controller
7.8
GP Pressure & Temperature Sensing
Any Analogue Volt channel may be used as inputs from additional general purpose (GP)
pressure and temperature sensors. The only restriction is that the sensor must have a 0-5V
output. The sensor calibration (the voltages that correspond to given
pressures/temperatures) must be known and this information must be entered into the ECU
via PCLink Tuning Software.
GP Pressure and Temperature Sensor Wiring:
·
Signal – Analogue Volt Channel
·
Power – As per sensor manufacturers specification (can use ECU's +5V out if
required)
·
Ground – Ground to ECU's Sensor Ground.