Thread: Warning Will Robinson - multiple D4 fault alerts!

Originally Posted by DiscoDB

I am actually surprised this did not work. I have a similar fault which is locking out the height controls and drops the suspension to lowered height. I just went into GAP and used the adjust height to set it at +20mm. Then went to service test and said re-enable EAS and hit continue and it immediately raised the height.

Obviously yours is a different fault plus mine is a D3. I suspect my fault is a bad splice on the power feed to the TCM module or a bad earth - but I still expected yours to try to raise as I noticed that the instruction to drop to lowered height only happens when you start driving.

All the time I had all the warning lights on or flashing - even after clearing all faults.

I also have GOE rods set to +50mm, so right now the car thinks it is in the lowered height but actually sitting 70mm above this at present.

I don't have the rods fitted so I'm reliant on the OEM settings/GAP etc.

As an aside, I had a timely visit yesterday from a local guy who volunteered to drive over and take a look. He's a D4 owner and very experienced mechanic with all the analytics gear and electronic wizardry, and actually understands wiring diagrams. After an hour of head scratching and tweaking, he's narrowed it down to a probable disconnect in the C2293 connector which sits under the left headlight. Unfortunately this connector requires removal of the power steering reservoir to gain access, a job made more difficult because of the way some electrical mods brackets have been bolted in adjacent to the reservoir.

One of the tests we did was checking the right rear wheel speed sensor using the IID tool while driving. All that confirmed was a complete lack of signal from that sensor.

Disco 4 wiring 1.jpg

Originally Posted by GregMilner

I don't have the rods fitted so I'm reliant on the OEM settings/GAP etc.

As an aside, I had a timely visit yesterday from a local guy who volunteered to drive over and take a look. He's a D4 owner and very experienced mechanic with all the analytics gear and electronic wizardry, and actually understands wiring diagrams. After an hour of head scratching and tweaking, he's narrowed it down to a probable disconnect in the C2293 connector which sits under the left headlight. Unfortunately this connector requires removal of the power steering reservoir to gain access, a job made more difficult because of the way some electrical mods brackets have been bolted in adjacent to the reservoir.

One of the tests we did was checking the right rear wheel speed sensor using the IID tool while driving. All that confirmed was a complete lack of signal from that sensor.

Disco 4 wiring 1.jpg

I hope you provided beer

Originally Posted by josh.huber

I hope you provided beer

Of course! Isn’t it the universal LR currency?

I'm far more suspicious of the wire having sustained damage either by rocks or chaffing from the recent trip somewhere along its path. That connector is also used by the LF height sensor, the compressor and the LR ABS and height sensor so the bundle is likely to be exposed in various places, with the rear the most vulnerable.

Edit: removed reference to LF ABS sensor.

Originally Posted by Graeme

I'm far more suspicious of the wire having sustained damage either by rocks or chaffing from the recent trip somewhere along its path. That connector is also used by the LF height sensor, the compressor and the LR ABS and height sensor so the bundle is likely to be exposed in various places, with the rear the most vulnerable.

Edit: removed reference to LF ABS sensor.

Thanks Graeme, I'll check it out on the hoist tomorrow.

Rats!

The little b****rds have chewed through wiring.

Oh well, off to Coles for some Rodent Extermination Devices....

Originally Posted by GregMilner

Rats!

The little b****rds have chewed through wiring.

Oh well, off to Coles for some Rodent Extermination Devices....

Wow! Do you use the car regularly or is it parked up a lot?? At least you found the issue. Saying that I used to have them sit on the engine of my old Magna and eat the palm fruits. Thankfully they didn’t eat anything other than the fruit

Originally Posted by DiscoJeffster

Wow! Do you use the car regularly or is it parked up a lot?? At least you found the issue. Saying that I used to have them sit on the engine of my old Magna and eat the palm fruits. Thankfully they didn’t eat anything other than the fruit

It sits in the carport sometimes for several days at a time without moving. Strategically placed baits in the engine bay could be the next trick. The indy has also recommended a new battery, a Delcor 638, which I've told them to order...unless anybody has a better idea?