Idle Control
Idle Control Wiring
This article explains the most common types of idle air control valves and how to wire them up using a Haltech Nexus or Elite ECU: Bypass Air Control (BAC) Two Wire This type of idle valve is the simplest to wire up, being a solenoid with just two ...
Throttle Follower
Throttle Follower Target Axis selection and changing values This table is intended to be used with RPM set as the first/x (left to right) axis and Pedal Position Source as the second/y (bottom to top) axis, though these axes are user configurable to ...
Ignition Correction
This table sets an ignition correction that allows for ignition timing to be advanced or retarded when the RPM is above or below the Target RPM, and idle control is active. Typically the timing will be advanced when below the Target RPM to add engine ...
Proportional, Integral and Derivative Gain
These tables allow mapping of the PID system, which controls the responsiveness of the Closed Loop Idle Control system. For information on how to tune PID systems, see the PID User's Guide. Proportional Gain In simple terms the Proportional Gain ...
Min Output
This table sets the minimum amount of Idle Output that can be used. This will override any calculations or commanded Idle Output amounts.
Post Start Base Offset
This table sets an amount of extra Base Output that is used to assist Idle Control in reaching the additional RPM added by the Post Start Target Offset. This is normally mapped to return to zero after a certain amount of time. Up to 3D mapping is ...
Post Start Target Offset
This table sets an amount of RPM that is added to the Target RPM upon engine startup. It is used to help an engine become stable after initial starting and is timed to eventually give no extra RPM. Up to 3D mapping is available.
Base - Closed Loop
In Closed loop mode, the ECU can make adjustments to the idle control motor duty based on RPM feedback. This table should still be set so that the amount of Base Output results in your actual engine RPM matching your Target RPM. However, when it is ...
Target RPM
Only available when Controller Mode is set to Closed Loop. This table sets the RPM that the Idle Control will try and achieve.
Base - Open Loop
In an Open Loop system, the ECU cannot make any adjustments to the idle control motor duty based on RPM feedback. his mean that the Base - Open Loop table fully controls the idle motor. The idle valve will simply move to the position set in this ...
Long Term Trim
Long Term Trim This node allows you to enable, disable and reset the long term trim learning in the ECU. The Apply to Base Table button will apply any long term trims to your Base Idle Control table. Long Term Trim Gain This table controls the rate ...
Idle Up
Air Conditioning Air Con Idle Base Offset - Active only when Air Conditioner has been enabled. The Base Duty will be increased by this amount of duty cycle when the Air Conditioner Output is active. Air Con Idle RPM Offset - Active only when Air ...
Idle Control
Idle Control The Idle Control function allows your ECU to control the engine idle speed. There are multiple ways this is achieved with either Drive-By-Wire (DBW) control, a Bypass Air Control (BAC) solenoid with either two or 3 wire types, or via a ...