Speedometer Output; Main Relay - ECU Master EMU User Manual

Speedometer output

Speedometer Output function is used to operate an electronic speedometer. On the basis of
vehicle speed, it generates a square wave signal with a frequency proportional to the vehicle
speed. The speedometer can be connected to one of the outputs for Stepper motor or free
INJECTOR / AUX.
PARAMETER
Output
VSS Multiplier

Main Relay

Main relay configuration defines which output is used to connect the main relay. This relay is
responsible for switching voltage of +12V to a relay that powers devices such as injectors, ignition
coils, solenoids etc.
PARAMETER
Main relay output
Invert output
DESCRIPTION
Device output to which the speedometer is connected
The value of the output frequency scaling, which allows to match
speedometer indication to the vehicle speed
EMU
G10
G17
G24
B24
Example of the speedometer wiring diagram
DESCRIPTION
Device output to which the main relay is connected
Reversal of output state. Can be used to test the operation of
the main relay
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