Haltech Wideband 02 Controller Manual - Manual (Page 11)

6. Remote display and recording of Lambda and/or AFR
In many applications it may be desirable to monitor the air-fuel data remotely using a dash-
mounted instrument. The HWC provides two options for that application.
6.1 Analog Lambda/AFR instrument.
There are many analog lambda/AFR displays on the market. They are essentially voltmeters for a
voltage between 0 and 1 V and measure the analog voltage of a narrow band oxygen sensor.
Some are true analog instruments while others provide a LED bar. Because of the very limited
sensing range of a narrow band sensor they are essentially useless as true AFR meters. With the
HWC, connecting these meters to the second analog output of the HWC allows them to be used
as true remote AFR meters, provided the HWC analog output is programmed to the
characteristics of the used meter. The HWC 's analog output 2 is factory programmed to provide
a linear output between 0V and 5V for an AFR of 10 to 20, allowing a digital voltmeter to be used
as the AFR display.
6.2 Connection to Haltech ECU’s
The addition of the HWC to the Haltech Engine Management System will allow for far greater
tune ability and functionality. The HWC will allow the AFR to be monitored and logged in real
time, making it possible for accurate tuning to be done anywhere. All Haltech ECU’s require the
use of the Analog output 2 (0-5v signal).
For E8 and E11v2: Using
the Brown wire (Analog output 2), the HWC can be
connected to either the O2A wire (Pin 12 on the 26Pin ECU
Connector), or any of the Spare A/D channels. Alternatively for
easy installation, the HWC can be connected into the Spare A/D
2 (Trim connector found near the ECU connector), using the 4-
pin connector.
For software setup please see the ECU instruction manual.
For E6X, F10X and E6GMX:
Using the Brown wire (Analog output 2), the HWC can be
connected to the O2 wire (Pin 2 on the ECU Connector).
Alternatively for easy installation, the HWC can be connected
into the Trim or Spare A/D connectors found near the ECU
connector), using the 4-pin connector.
For software setup please see the ECU instruction manual.
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