The Target RPM table only appears when idle control's Controller Mode is set to Closed Loop. It holds the idle speed the ECU aims for. The closed loop controller compares actual rpm to this target and adjusts the idle valve or drive by wire throttle to close the gap, starting from the closed loop base position.
Most people map the target against coolant temperature, with a higher idle on a cold engine that settles down as it warms. When setting it:
- Keep the warm target at a speed the engine idles smoothly at without help from the controller.
- Make sure the base position gets close to each target by itself. The controller should trim, not do all the work.
- If idle hunts around the target, look at the PID gains before changing the target.
Need a screenshot of a typical table? Ask us and we'll send it over with advice for your build.
