Haltech E6M - Manual (Page 107)

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Active AUX In.
This field defines the active state of the Air conditioning request line installed in your
vehicle. If the line is active high this means that the signal on the line when an Air
conditioning request is made is ~5 volts and when the line is idle the voltage is ~0
volts. If the line is active low this means the Air conditioning request is ~0 volts and
the idle line is ~5 volts. (see 13.1 The Input/Output Page)
Note: When using the A/C function, the Aux. In Function in the Identification
must be set for A/C Request. When using A/C, other functions that use the
Aux. In Function cannot be used.
16.17 Engine Control Relay
This feature allows the 12 volt supply to the engine to be disconnected when the ECU is not
powered up. There are no parameters for this feature. The engine control relay should be
wired as shown in figure 16.17. The ECU is not capable of supplying power to the relay or
the components it drives but can sink the current required to energise the primary winding of
the relay.
Figure 16.17 Engine Control Relay wiring diagram
16.18 VTECH
This feature allows the operation of the variable valve timing associated with some modern
engines. This feature acts purely to control a switching solenoid and is not capable of
controlling continuously variable valve timing.
On RPM
This field defines the engine speed above which the VTECH is enabled. This field
must be greater than Off RPM or it will be ignored.
Off RPM
12V 12V 12V
OR
To PWMx To PWMx
To Engine
To Engine