ETAS
Functional Description
ES430.1 - User’s Guide
36
5.5.5
RI Nom
Shows the desired value of the sensor internal resistance which is used for
heater control.
5.5.6
Correction Factor
Shows the linear correction factor for the pump current which is used to correct
the starting values of older lambda sensors (see section 6.8 on page 68).
5.5.7
Heater Curve
Shows the name of the heater curve which the module uses when heating the
lambda sensor.
5.6
Diagnostic Functions
The ES430.1 constantly checks that the lambda sensor is working correctly.
Any deviations are shown via the LED. The operational state diagnosed is dis
-
played in the calibration software.
5.6.1
Internal Sensor Resistance Ri
Shows whether the internal sensor resistance R
i
deviates more than 10% above
or below the desired temperature value 300 Ohm.
5.6.2
Lambda Control
Shows the operational state of the lambda control, any lack of supply voltage
to the sensor or an internal defect in lambda control.
5.6.3
Sensor Type
Shows whether the ES430.1 is connected to the correct lambda sensor type
(LSU4.9). This is detected via the identification of the special cable.
5.6.4
Sensor Supply
Shows whether the sensor supply voltage is within the range permissible for
sensor heating. In the case of a value under the minimum input voltage defined,
"lambda control" displays an error, as lambda control then does not work any
more.
5.6.5
Lambda Sensor Short
Shows shorts of the cables and connectors involved in measuring which lead
to incorrect measurements. Shorts of the sensor heater result in an overheated
heater current and blow the fuse in the sensor cable. As a result, the “lambda
control” error is displayed when this overcurrent problem occurs.