Thread: Best fault diagnostics solution

You are far more expert at this than me Graeme !

My understanding is something like this (from the GAP manual and experience) is that the internal value for the ECU has a maximum of 250mm - this does not correspond to mm in ride height (it is height sensor calibration) - the calibration values will differ from vehicle to vehicle and from corner to corner to achieve "flat at rest". So in my case the values at normal ride height (flat) are around 200mm (varying by +/-15 per corner as this is not ride height). Using the adjust all command in IIDtool, I can adjust normal ride height in 10mm increments up to the 250mm limit (as defined by the highest corner setting and rounded down to the nearest 10mm increment) - reality is I currently am able to get +30 with this approach. If you take the time to set 2 profiles you can do it corner by corner (which IIRC effectively gives me about +40 front and +45 rear).

Having mucked around with this a little, I normally just use "adjust all" which gives me roughly an extra inch at normal ride height (and that works for me because I am not that hardcore). If I did want more accessible/quicker/flexible heights, I would buy your product and/or some rods. Hope those ramblings make some sense.

Yes, you can get more than +25mm.

The tool allows you to add or subtract from current calibration heights, within limits. For example from the manual ...

If the current calibration is:
Sensor Calibration height value (mm)
Front Left 205
Front Right 200
Rear Left 195
Rear Right 183

And the limits of the EAS ECU are:
Sensor Limit Value (mm)
Upper Front 250
Upper Rear 250
Lower 150

The front can be raised by a maximum of 250-205 = 45 mm.
The front can be lowered by a maximum of 200-150= 50 mm.

The rear can be raised by a maximum of 250-195 = 55 mm.
The rear can be lowered by a maximum of 183-150 = 33 mm.

The IIDTool automatically calculates these values and allows only changes within these parameters.

Originally Posted by Graeme

I understood that standard height can only be recalibrated a max of 25mm higher, regardless of the tool making the changes. IIRC the GAP people advocate fitting shorter rods and then recalibrating standard height lower for normal use because standard height can be lowered further than raised.

NB The GAP tool doesn't fool the suspension ecu - it changes the calibration values for normal height within the ecu. It doesn't change the speed limit for off-road height nor for any other special height.

Yes I do realize the IID tool does not "fool" the cpu, the LLAMS and Rods do.
For simplicity is why I grouped them together, yes I should of elaborated more.

Perhaps I'm recalling that the ecu allows only 25mm increase at a time meaning that 2 changes are required to get more, but this might not be correct either. My unit adjusts the sensor signals rather than ecu values so I've not needed to delve into the workings of the ecu.