j_rov
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of course, but I'm quite competent with plumbing and electronics!
P38A Extended height mode
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RangeRoller dt
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Then fix your valve block 
j_rov
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I will if that's the problem!Then fix your valve block
RangeRoller dt
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Listen to Wammers
Hope you get to the bottom of it, I just nipped it in the bud and put coils on mine
Hope you get to the bottom of it, I just nipped it in the bud and put coils on mine
j_rov
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I really dont want to do that. I think the EAS is a very good system (when working A1).Listen to Wammers
Hope you get to the bottom of it, I just nipped it in the bud and put coils on mine
RangeRoller dt
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Yes don’t!
NRVs aren’t expensive just potch to get to, compressor rebuild is cheap enough, electrical gremlins require time and hair loss, maybe a few pulls
NRVs aren’t expensive just potch to get to, compressor rebuild is cheap enough, electrical gremlins require time and hair loss, maybe a few pulls
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NRV 1 is in the valve block it seals air in the pressure tank. Air travels out of the compressor past the sealed diaphragm valve and out through an 8 mm pipe to drier, through drier and into the valve block via an 8 mm pipe. It then passes NRV 1 into the tank line and into the tank. When the compressor stops air is evacuated from the fill/exhaust gallery via the deactivated diaphragm valve in the reverse direction of fill, to blow condensation out of the drier. The fill pipe to the tank then becomes the pressure feed line to the corner valve gallery via NRV2. When the suspension rises the ECU opens the inlet valve and also opens the corner valves and air passes into bags until the height sensors read the correct height for the height selected. Rear rises first then front. If the suspension needs to drop the ECU opens the exhaust valve and the corner valves and air flows out of the bags past the exhaust valve and through NRV 3 into the fill/exhaust galley and out to atmosphere past the diaphragm valve. Front drops first then rear until sensors detect the required height then all valves are closed.
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Also if chassis grounds and extra extension takes place, before the suspension is moved to extra extended height the system drops to the bump stops first. Only then will it rise to extra extended height.
tomcat59alan
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RangeRoller dt
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So the extra extension is a system within the ecu? And would be very difficult if at all possible to make it manually controllable?
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Salisbury Nick
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Salisbury Nick
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j_rov
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nope, not me. Mines got it's full arse and traction control is suspect!
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Same place. Good quality stuff as they do trucks and aerospace.
j_rov
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Sorry, i meant where abouts in the pipework did you connect your gauge to!
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Talk to KurtJohnson on here. He can supply NRVs or probably a whole valve block.
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I'll take a photo next time I am out there. Cannot remember off the top of my head.
RangeRoller dt
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It’s these things
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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 ?
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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