[guy]

Hi all,
my year 2000 4.6 had a hard fault on the eas. i fitted a new air spring,and went to a local indie to have the fault cleared.
Their Rovercom could not sync,just showed an error,unable to connect check ecu and relay.The indie said that is the first time that has happened to them.
any thoughts anyone?

 

[RRToadHall]

Dirty OBD port, loose EAS ECU connection, Loose or dirty timer relay connection. I would pull down the kick panel that the OBD port is mounted in and check it first. THey can become corroded even down right foul if there is any leaking above it.

 

[BBS SPY]

Besides Power and ground, EAS communications requires good connections on 3 other pins, where all other systems require just 1 or 2. These pins are also not used to communicate with any other system, and our diagnostic systems are well honed in terms of communication reliability as indicated by the Indies surprise, so it is highly likely you just have a problem with one of these Pins at the OBDII connector or there is another wiring problem on the EAS Diagnostic connection circuit which includes the delay timer relay unit. If you cant see any problem with a visual inspection along the lines of rrtoadhalls very sound advice, get yourself a copy of the wiring diagram and meter through the diagnostic lines to the ECU and the Timer relay. :thumb:

 

[guy]

Thank you Gentlemen.

 

[guy]

Another question,
i pulled the cover off the delay timer,the EAS delay timer relay is just a small part of that curcuit,there seems to be a small fairly complex control curcuit built in as well.
What does the delay timer actually do?

also do the height sensors still operate when the delay timer is disconnected? and do they still operate when the ECU is in a hard fault?

 

[BBS SPY]

It provides power (or not) to the EAS system and is controlled by 3 factors.
A) IGN on or off sense
B) its own built in timing (ie when ign is off, at 20 min intervals it applies power to the EAS for self levelling)
C) Over ride control from pin 1 of the OBDII connector.


It's all in the technical manuals that LR provide :thumb:

 

[guy]

Thank you BBS SPY,
i am a Mechanical engineer, but electronics is all Black magic to me!

B) its own built in timing (ie when ign is off, at 20 min intervals it applies power to the EAS for self levelling)

That i find interesting,that can only be by dumping air from the system ,so the self leveling will always be lower?

 

[BBS SPY]

Thats why a bit of a leak in one corner EAS bag means you find your vehicle totally on the floor on all four corners in the morning :lol:
I got a bag leak on my L322, i figured which corner it was by de activating the EAS and leaving it to see which corner drops.