Haltech E8 - Manual (Page 53)

Haltech E11/E8 Instruction Manual
Edit panel contains the parameters required to be setup for each output function. Included in every set of
parameters is the ability to invert the output of the signal. Inverting the output signal does not allow the
output to drive a +12V signal, the output from the driver will still be a ground output when switched on –
inverting the output swaps the “off” and “on” signals – so what would be “on” in normal mode is “off” in
inverted mode.
Discrete Output Types
These output types are on/off style outputs. These types are available on all channels, each output is
capable of driving a maximum of 800mA, if more output current is required to drive the device connected
to that output a relay is required.
Air-Conditioning Control
The air conditioning control can perform two tasks.
Air conditioning control can be used to assist in turning off the air con compressor when under high loads.
This allows more power to be used to drive the wheels.
The air con control output can also be used to trigger increased idle speed to accommodate the extra load
from the air-con compressor.
The air-conditioning control requires input from either the air conditioning switch, or from the output of the
thermostat that drives the air conditioner compressor clutch.
If this output is used for task 1 only, then it is possible to intercept the output from the switch and connect
the output of the ECU to the air-con switch wire.
Figure 47 - AC Control Wiring Without Idle-up
If the idle control needs to be altered when the air-con compressor clutch is engaged, then the ECU must
be connected between the air-con thermostat output and the compressor clutch to ensure that the output
of the ECU has a direct relationship with the compressor clutch.
Figure 48 - AC Control Wiring With Idle-up
The A/C output control is disabled when engine speed is below the cranking RPM. This is to reduce the
load when cranking and to help prevent stalling if engine RPM falls too low.
• TPS Threshold - AC output is disabled when TPS is above this value. This removes the air
conditioning compressor load from the engine under high driver demand.
Copyright © Haltech 2008 Page: 53
Air Con
Switch
ECU
Air Con
Thermost
Compressor
Clutch
Air Con
Switch
ECU
Air Con
Thermostat
Compressor
Clutch
Aux Out
Aux Out Aux In
Aux In