P38A Extended height mode

brianp38dse said:

Sounds like a candidate for Arrnott gen 3`s and adapt the height sensors

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Salisbury Nick said:

Thats the best explanation I've ever seen of how the EAS works. Thank you @wammers

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pwood999 said:

From the EAS System Info Doc. (Also might explain the "random high mode" fault several peeps have seen when the valve solenoid connector pins are loose.)

AUTOMATIC HEIGHT SELECTION
The system will default to extended ride height if the system is unable to lower a sensor’s bit
count for any ten-second period, indicating the vehicle is “high centered”. A flashing high
profile lamp will indicate extended ride height. The system will stay in this mode for ten
minutes or until the operator manually requests a lower ride height. The system could also
drop to standard if the vehicle speed exceeds 35 mph.

For manual selection, a momentary button & 10 second timer relay in the 12V wire that triggers the Exhaust Valve to the Driver Pack would probably be best (Pin-9 on ECU C117). This should trigger Extended mode because the ECU then cannot lower any corner, but hopefully avoid faults. I'm assuming that fault detection requires the ECU to see longer than 10 second height change failures ?

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wammers said:

Extended height is not extra extended height which is what the OP was asking about..

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Grrrrrr said:

I thought there was only

Access
Motorway
Standard
High
(Extended high - unselectable but goes on when grounded).

I've been grounded and felt it trying the extra-extended. As others have noted, it didn't help because the diffs were fouled, I didn't have TC and because of the angle the free wheel on each axle just span. Might have stood a chance with diff-locks.

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wammers said:

Ok treat high as extended wade height. After that is none selectable extra extended. Maybe i worded it slightly wrong.

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Grrrrrr said:

I think the Nanocom calls Motorway LOW so there're a lot of interchangeable terms going around. Now I think about it I might have heard Highway used too.

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cornishboater said:

Don’t forget the extra low bounce mode....

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Wazzajnr said:

Otherwise known as broken!

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Rubberknees said:

Few of us been there and got the T-shirt

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Grrrrrr said:

Yeah, drove a mile or so once on the bump-stops. Not pleasant!

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