Internal Lambda Control
Some Link G4X ECUs contain internal wideband Lambda sensor controllers. A Bosch LSU 4.9 lambda sensor can be wired directly to the ECU without the need for an external controller.
·The Link G4X Fury has one internal Lambda sensor controller.
The lambda sensor is used to measure exhaust oxygen content and hence estimate air fuel ratio.
Note: Refer HERE for information on wiring a lambda sensor to the Internal Lambda Controller.
This setting is only available when using an internal Lambda and controls whether or not the Lambda sensor is turned on and heated up while the engine is off. It is recommended that this option is set to No for all installations except during tuning of cold start. Oxygen sensors run a very hot ceramic tip and can be easily damaged by excess moisture contacting the tip and suddenly cooling it. Typically the engine is started first, then some time later after it is deemed that the exhaust is warm enough the sensor is gradually heated until it reaches its working temperature.
·No - The ECU will not control the lambda sensor when the engine speed is stalled. This is the recommended mode for normal engine operation as it helps prolong lambda sensor life as the sensor is active only when hot exhaust gases are flowing past.
·Yes - The ECU will control the lambda sensor when the ECU is on. This option is useful for cold start tuning which requires the lambda sensor to be operating before the engine is first started.
Analog Lambda Input
Wideband lambda values can be input into the ECU via the 0-5V analog inputs in conjunction with either the built in calibrations or the configurable calibrations.
The following is a list of the built in sensor calibrations for various Wideband Lambda Sensor controllers. Note that these calibrations can be used with any sensor controller as long as the sensor controllers output has been calibrated to match.
Note: ALWAYS confirm the output calibration of your sensor controller.
Link CAN Lambda
To use a Link CAN Lambda to read in Lambda 1 or 2 you will need to set the Lambda Sensor Control to Link CAN Lambda, setup the appropriate CAN bus and configure the CAN Lambda to write to the correct Lambda.
More information on setting up a Link CAN Lambda can be found here.
Generic CAN Wideband
To use a generic CAN Lambda device you will need to setup a custom CAN stream.
You can either set the relevant Lambda (1 or 2) to Link CAN and then have the CAN stream write directly to the runtime or have the CAN stream write to a CAN analog and select that CAN analog as the source and the appropriate calibration (None calibration will pass the value straight through).
Lambda 3-8 are only writeable directly by CAN.