L322 ABS fault or something else ???
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3rd Gear
Joined: Feb 2025
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From: North Wales
L322 ABS fault or something else ???
Hi all looking for a little bit of help if anyone can help I'm a mechanic full time but this has me stumped and I'm left scratching my head 🤣
So I've got a 2006 rangerover L322 my own car now my problem started about 6 months ago I got the 3 amigos come on but it also locked a front wheel up so couldn't drive luckily I was not to far from home so managed to pull it into a parking Bay next day I could drive again then I noticed it started to do it a lot more over the coming weeks so replaced the discs and pads all around found the passenger rear caliper was not best so replaced it and what a nightmare I had trying to bleed it up took me about 6 hours to get a pedal.
Again was ok for a couple of weeks and started again so I had a look around and on the forum someone said about cracking off the brake pipes at the abs pump this worked a treat and was a short term solution but it still kept happening totally random.
I read something about the brake booster failing so I brought a replacement and replaced the master cylinder at the same time but still had the same issue I ended up unplugging the brake booster and hay presto it all seemed fine only down side I had was now the adjustable suspensio is set to default but the fault still happens from time to time. So again I was having a read around my I add there are no codes stored when everything is together only Light Control module faults.
So I've replaced all 4 abs sensors and brake booster discs and pads and a caliper but the thing that is absolutely frying my brain is this.
On the live date in the VDS ( vehicle dynamic system ) the wheel speed when parked is 328mph on all 4 wheels and as you drive that increases at 30mph the live data says I'm doing 1035mph on all 4 wheels.
But and here's the strange bit if I go into live data via the TCM ( transmission control module ) all 4 wheels read 0 when parked and at 30mph the live data says 30mph on all 4 wheels
So my understanding is the 2 control modules are acting against each other and causing the brakes to come on to slow the car down as there's 2 different readings.
Sorry it's such a long read and probably not the best explained but if anyone has any ideas I'd be super super greatful it's driving me mental 🤦
So I've got a 2006 rangerover L322 my own car now my problem started about 6 months ago I got the 3 amigos come on but it also locked a front wheel up so couldn't drive luckily I was not to far from home so managed to pull it into a parking Bay next day I could drive again then I noticed it started to do it a lot more over the coming weeks so replaced the discs and pads all around found the passenger rear caliper was not best so replaced it and what a nightmare I had trying to bleed it up took me about 6 hours to get a pedal.
Again was ok for a couple of weeks and started again so I had a look around and on the forum someone said about cracking off the brake pipes at the abs pump this worked a treat and was a short term solution but it still kept happening totally random.
I read something about the brake booster failing so I brought a replacement and replaced the master cylinder at the same time but still had the same issue I ended up unplugging the brake booster and hay presto it all seemed fine only down side I had was now the adjustable suspensio is set to default but the fault still happens from time to time. So again I was having a read around my I add there are no codes stored when everything is together only Light Control module faults.
So I've replaced all 4 abs sensors and brake booster discs and pads and a caliper but the thing that is absolutely frying my brain is this.
On the live date in the VDS ( vehicle dynamic system ) the wheel speed when parked is 328mph on all 4 wheels and as you drive that increases at 30mph the live data says I'm doing 1035mph on all 4 wheels.
But and here's the strange bit if I go into live data via the TCM ( transmission control module ) all 4 wheels read 0 when parked and at 30mph the live data says 30mph on all 4 wheels
So my understanding is the 2 control modules are acting against each other and causing the brakes to come on to slow the car down as there's 2 different readings.
Sorry it's such a long read and probably not the best explained but if anyone has any ideas I'd be super super greatful it's driving me mental 🤦
Last edited by Alex1983; Feb 21, 2025 at 01:31 PM.
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