Auto Meter 4378 - Manual (Page 5)

Auto-Dim mode:
This product incorporates an Auto-Dimming feature that allows it to adjust automatically for varying lighting conditions. This is accomplished
with a sensor light embedded in the dial. You may enable or disable this feature depending upon your viewing preference. When Auto-Dim
mode is disabled, the product and LED’s operate at maximum brightness regardless of atmospheric lighting conditions. The auto-dim mode
is set to “off” from the factory.
To view your current Auto-Dim setting:
From Real-Time Mode, press mODE (-) to scroll until the display indicates “Br” for brightness, then press SELECT (+) to display your
current Auto-Dim setting which will be indicated as either “ON” or “OFF” in the SSD.
If neither button is pressed for 3 seconds after the Auto-Dim Setting is displayed, the gauge will return to Real-Time Mode.
To Change your Auto-Dim setting:
When the current Auto-Dim setting is displayed, press mODE (-) to toggle between “On” and “OFF”.
After you have selected your new Auto-Dim setting, the gauge will flash your new setting 5 times on the display and then the SSD
will display “S C” for Save/Cancel.
To confirm your new Auto-Dim setting, press
mODE (-). This will save your Auto-Dim setting changes and return
the gauge to Real-Time mode.
To cancel the changes and return to your previous set point, press
SELECT (+). This will cancel the Auto-Dim setting changes and
return the gauge to Real-Time mode.
Heater Control mode:
All O2 sensors must be heated before an accurate signal is produced. Potential sensor damage can occur if the gauge begins to heat the
sensor before the engine is running due to condensation that forms on the sensor tip and in the exhaust. To accommodate this, an internal
trigger within the gauge will automatically begin heating the sensor when 13.5 volts or higher is seen on the Red wire (“Normal” operating
mode). While the gauge does not require 13.5 volts to operate (12 volts will suffice), this voltage is used to indicate to the gauge that the
engine is running, as most regulated charging systems will maintain 14 volts or higher. Once the gauge sees 13.5 volts, it will begin
heating the sensor and transition from (---) to a 20 second countdown on the seven-segment display. When the countdown is complete,
the sensor is heated, and the gauge will begin reading air/fuel ratio in real-time.
In applications where a standard charging system is not used (vehicles without a regulated alternator, for example) there is an override
available that will allow sensor heating to occur without the gauge reading a 13.5 volt trigger. This can be accomplished while the seven-
segment display shows (---) (thereby overriding “Normal” operating mode) or set to trigger when 12 volts is applied on the Red wire
(“On” operating mode).
To View your current Heater Operating Mode:
From Real-Time Mode, press mODE (-) to scroll until the display indicates “Htr”, then press SELECT (+) to display your current
Heater Operating Mode.
If neither button is pressed for 3 seconds after the Heater Operating Mode is displayed, the gauge will return to Real-Time Mode.
To Override “Normal” Operating Mode:
While displaying (---), press any button to begin the 20-second heater process.
To Switch Between Heater Operating Modes:
When the current heater operating mode is displayed (either “Nor” or “On”), press SELECT (+) to choose the current setting or
mODE (-) to switch to the alternate setting.
After you have selected your new Heater Operating Mode, the SSD will display “S C” for Save/Cancel.
To confirm your new Heater Operating Mode, press mODE (-). This will save your current Heater Operating Mode and return the
gauge to Real-Time mode.
To cancel the changes and return to your previous Heater Operating Mode, press SELECT (+). This will cancel the Heater
Operating Mode change and return the gauge to Real-Time mode.