Freelander 1 G-sensor/ Longitudinal Accelerometer

[GrumpyGel]

It might have been useful GG - as the D2 also uses a similar HDC with the G-sensor. As Nodge mentions, it should also function as an inclinometer as well - so it would have "known" that you were descending a hill - and perhaps under these circumstances a first gear crawl with HDC assistance would have made for a slightly more comfortable experience???

You'll have to come round for a beer Rob. I'll take you over to the hill and we'll see what 5mph feels like going down it and whether we'd be happy at that on ice

I turned the engine off for a bit and after that didn't get enough speed up to activate the ABS until I was back on the flat again - which is about the slowest HDC will keep to.

This hill is very steep and has sharp 90 degree bends - in normal driving conditions I've been overtaken by cyclists coming down this hill - which was a shock

Edit : We could just go down it with HDC

 

[Dartmoor Navigator]

in normal driving conditions I've been overtaken by cyclists coming down this hill - which was a shock

That can be solved with a bit of erratic driving and broom handle out of the driver's window

 

[GrumpyGel]

That can be solved with a bit of erratic driving and broom handle out of the driver's window

lol. Wrong window though - would need to have been out of the passenger window

 

[rob_bell]

You'll have to come round for a beer Rob. I'll take you over to the hill and we'll see what 5mph feels like going down it and whether we'd be happy at that on ice

I turned the engine off for a bit and after that didn't get enough speed up to activate the ABS until I was back on the flat again - which is about the slowest HDC will keep to.

This hill is very steep and has sharp 90 degree bends - in normal driving conditions I've been overtaken by cyclists coming down this hill - which was a shock

Edit : We could just go down it with HDC

Now that sounds like an invitation I'd like to take you up on!

Point taken about the topology of the hill! Sounds as though you really just needed a ski lift. LOL

 

[GrumpyGel]

Now that sounds like an invitation I'd like to take you up on!

The invitation is out there if you ever fancy popping over

I shall be popping over to East London later in the year.

Point taken about the topology of the hill! Sounds as though you really just needed a ski lift. LOL

Funny you should say that, cos 1 opened up in the last few months!

There's a big multi-million dollar mountain bike run network and zip line complex opened right next to the road I was on!

https://www.christchurchadventurepark.com/bike-trails

I was on Dyers Pass Road on the left of the map on that page. Its not a ski lift as such - its a chair lift that you can put bikes on as well. It rises 430M then you come back down on your bike, or the 4 zip lines - the longest of which is over a KM long

I haven't been yet, might go next month when all the kids are back at school.

 

[GrumpyGel]

Here's a pic of 1 of the zip lines - looks fun

 

[rob_bell]

The zip wire looks fun! And if you're in east London, we should meet up for a drink (I'm in North London)

I've taken the plunge and ordered a second hand G-sensor, SBB101310G - the correct part from a same-age Freelander. Advertised as being in "Good Working Order" - so if it isn't I'll get me money back. Fingers crossed it will work though - although the proof of the pudding will be to get the car back onto T4 - which it'll need anyway to re-calibrate the system for the new sensor.

Need to get some time to investigate the right front wheel speed sensor now...

 

[Dippypud]

Here's a pic of 1 of the zip lines - looks fun

View attachment 115381

There's a long zip-wire in Wales, I think it's a mile, but you do it lying down .... steady missus ....

https://www.zipworld.co.uk/location/detail/bethesda

 

[rob_bell]

Crumbs! One for my kids when they're older! lol

 

[GrumpyGel]

Looks a cool place - I've seen videos of the trampolines in the caverns doing the rounds on Facebook - quite unique

 

[ER1C]

Crumbs! One for my kids when they're older! lol

They have smaller ones for kids to do as well...

 

[rob_bell]

My daughter would certainly be up for it: she's fearless LOL

 

[Nodge68]

This is all the electrical manual says about the G sensor. It looks like it is a 2 axis accelerometer though.

 

[rob_bell]

An up date for this thread: I had the Hippo on Philip's T4. As you'll recall from earlier in the thread, the G-sensor voltage was out of range, and the HDC/ABS/TC ECU reported this as an intermittent "inappropriate" signal fault.

I bought a second hand G-sensor from a same model-year Freelander and was ready to fit it. However, it occurred to me that the G-sensor calibration might be out, as T4 provides the option to re-calibrate the sensor. The workshop manual also states that any new sensor needs to be calibrated. So what if someone had replaced the G-sensor previously and hadn't calibrated it???

So with a single button press within T4, the original G-sensor was recalibrated (within a second: I thought it would be more long-winded than that!) and now it is providing appropriate acceleration estimates in m/s2.

Let's see whether the three amigos stay away now and whether this extremely simple (with T4!!) "fix" has done the trick.

Still not sure why my G-sensor was incorrectly calibrated, but who knows what someone has done in years of previous ownership (I only know that that the OSF ABS sensor had been replaced according to the history file provided with the car, but clearly the three Amigos had been a recurrent companions for previous owners! LOL

 

[GrumpyGel]

An up date for this thread: I had the Hippo on Philip's T4. As you'll recall from earlier in the thread, the G-sensor voltage was out of range, and the HDC/ABS/TC ECU reported this as an intermittent "inappropriate" signal fault.

I bought a second hand G-sensor from a same model-year Freelander and was ready to fit it. However, it occurred to me that the G-sensor calibration might be out, as T4 provides the option to re-calibrate the sensor. The workshop manual also states that any new sensor needs to be calibrated. So what if someone had replaced the G-sensor previously and hadn't calibrated it???

So with a single button press within T4, the original G-sensor was recalibrated (within a second: I thought it would be more long-winded than that!) and now it is providing appropriate acceleration estimates in m/s2.

Let's see whether the three amigos stay away now and whether this extremely simple (with T4!!) "fix" has done the trick.

Still not sure why my G-sensor was incorrectly calibrated, but who knows what someone has done in years of previous ownership (I only know that that the OSF ABS sensor had been replaced according to the history file provided with the car, but clearly the three Amigos had been a recurrent companions for previous owners! LOL

Interesting snippet of info

 

[rob_bell]

Bad news: the three Amigos returned. Ive borrowed Philip's T4 and have interrogated the ECU. Good news I think: the only fault stored on the HDC/ABS ECU was the G-sensor. Inappropriate signals.

Replacing the g-sensor was easier than I thought; I only had to take out the centre cubby box liner and then a couple of extensions for the 1/4" socket to remove the three retaining nuts. Replaced the sensor from the bay of E, and calibrated it on T4. Hopefully job done now! Time will Tell...

Took some pictures: wildl upload later