Loss of 12v Power on Ignition

What diagnostic tool are you checking for errors with?

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Originally Posted by Saitch

Pressure sensor voltage at all corners is 4.9v.

I have done a 'Hard Reset', to no avail and checked the 70A relay. Relay clicks in and out and shows 0.000 ohms resistance.

I can hear the compressor working normally, too.

Might be time to give my friendly, local auto 'leccie a call and the lure of an ale or two.[bigsmile1]

'Terrain Response' not available either. Due to the lack of height, perhaps?

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Did you also do a clear all faults with the tool? Even though no faults may be showing, a clear all request should still send a signal to the ECU’s to clear any present faults that may not be displaying.

And check the TCCM connections behind the battery box. Prior to finding corrosion on the connectors here it used to take multiple attempts to clear the suspension/terrain response fault and it did not always show fault codes.

So I would do hard resets, and resets with the IID tool, and so on until it cleared (prior to finding the issue with the TCCM connectors).

Pays to eliminate as many common causes before taking it to someone who will start all over again.

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Originally Posted by DiscoJeffster

What diagnostic tool are you checking for errors with?

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I've only got an iCarsoft, which has been sufficient, up to now.

ChookD2 with Nanocom is kindly coming for a drive tomorrow.

OK. The Nanocom shows a 'Loss of Communication to Ride Level Module', which apparently affects the All Terrain setting, which affect blah blah blah. [wink11]

That is pretty normal - comes up even when there are no problems. If after clearing is doesn’t come up straight away it just indicates at some point the handshake between the modules to check all is OK did not pass.

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Originally Posted by DiscoDB

That is pretty normal - comes up even when there are no problems. If after clearing is doesn’t come up straight away it just indicates at some point the handshake between the modules to check all is OK did not pass.

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Yep. The problem is still there. The 'Fault' comes up immediately. I'm giving the auto sparky a call tomorrow. Hopefully, it is only the battery.

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Originally Posted by Saitch

Yep. The problem is still there. The 'Fault' comes up immediately. I'm giving the auto sparky a call tomorrow. Hopefully, it is only the battery.

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Just a thought, you might be better off phoning an Indy instead. They should be in top of all the funny issues that can occur

OK. All sorted, touch wood.
Using the expertise of our local auto electrician, we ascertained that the compressor was working when getting power. After another hard reset, he unplugged the LLAMS module and we got the console lights to come on, on the 'Height Selector' paddle. On starting the vehicle, all was good. However, on turning off, the 'Suspension Fault' warning appeared again.

Sparky then removed the whole LLAMS wiring harness, plugged back to factory EAS, did another reset and everything appears to be back to normal. [thumbsupbig]

He thinks the LLAMS unit and/or harness, may have copped a spike when the crank battery, negative terminal had bad contact.

p.s. Nanocom states: 'No Faults in any ECUs'.