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millerj90



Member Since: 25 Oct 2010
Location: London
Posts: 195

United Kingdom 2012 Range Rover Westminster TDV8 Santorini Black

**** Update ****

So after a couple of weeks I think I'm finally getting to grips with this.

Both switch packs changed to resolve the non functioning horn.
If it helps anyone LR029644 has been superseded to LR057123. This was actually the cause of the non functioning horn.

The actual number on the part (sticker) for LR057123 is CH42-13D-767-BB1

I have obtained what I think is the original LR029644 which has the sticker code of CH42-13D-767-BA1, and all is good, with both horn buttons working.

Just for completeness the RHS switch pack is labelled CH42-13D-767-DA1


The only thing left to solve now is an intermittent "Cruise Not Available", this appears to occur when ACC is bringing the car to a halt, and is proceeded by a "Driver Intervene" message.

The manual states that this combination of messages could also be attributed to an ACC Failure, with that in mind the IID fault codes read are as follow: -

CCM-Cruise Control
U0401-67 (2Cool Invalid data received from engine control module/powertrain control module - Algorithm based failure - signal is incorrect after the event.

and

PCM-Engine
U2108-00 (2Cool Adaptive speed control

I realise that this system is at best a little "flaky" but others seem to have gotten it working properly. The only thing I can thing of at the moment is that my Radar Unit software is variant is BH32-9G768 AC, which is down-level from the latest AD version.

Any ideas welcome Very Happy

Post #515440 15th May 2019 5:16pm
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GraemeS



Member Since: 07 Mar 2015
Location: Wagga area
Posts: 939

Australia 2012 Range Rover Autobiography TDV8 Bournville

I favour the updating of the radar unit to the latest s/w version but if your PCM version is back-level further than mine then it might also need updating.

Post #515462 15th May 2019 9:46pm
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millerj90



Member Since: 25 Oct 2010
Location: London
Posts: 195

United Kingdom 2012 Range Rover Westminster TDV8 Santorini Black

So far so good.
I obtained a software update from GAP, loaded it and set the radar to recalibrate as instructed. A short drive to allow the unit to recalibrate, and all seems good so far.

Cruise functions, adaptive cruise functions and stop & start appear to function with no errors. Al ,I get drive tomorrow will give the system a more thorough shake down.

Many thanks to GraemeS who inspiration and knowledge got me this far Very Happy

Post #515539 16th May 2019 6:24pm
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millerj90



Member Since: 25 Oct 2010
Location: London
Posts: 195

United Kingdom 2012 Range Rover Westminster TDV8 Santorini Black

I'm still having a few niggles with this. The latest being "intermittent "Cruise Not Available", this appears to occur when ACC is bringing the car to a halt, and is proceeded by a "Driver Intervene" message".

IID only show one fault that may have bearing and its: - "U0401-67 (2Cool Invalid data received from engine control module/powertrain control module"

I'm wondering if a Powertrain ECU reflash to the latest software may solve this.

PCM-Engine TDV8 4.4L
Assembly (F113)
Current: BH42-12A650-NAC
New: BH42-12A650-NTL

Strategy (F118)
Current: BH42-12A204-NTC
New: BH42-12A204-NTD

Calibration
Current: BH42-K532-NTJ
New: BH42-K532-NTL

If anyone is out with their IID tool and could take the time to let me know what settings they have, it'd be much appreciated.

Best Regards
John

Post #515945 20th May 2019 2:29pm
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GraemeS



Member Since: 07 Mar 2015
Location: Wagga area
Posts: 939

Australia 2012 Range Rover Autobiography TDV8 Bournville

Mine from mid last year.

PCM-Engine TDV8 4.4L (Update available)
Assembly (F113) BH42-12A650-NAC -> BH42-12A650-NCK
Calibration (F124) BH42-12K532-NCH -> BH42-12K532-NCK
Hardware (F111) BH42-12B684-NA = Up-to-date Serial 1254005125031220
Strategy (F188) BH42-14C204-NTC -> BH42-14C204-NTD

I don't use ACC to bring the vehicle to a stop so I can't say if it would always work without error.

Post #516006 20th May 2019 9:53pm
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millerj90



Member Since: 25 Oct 2010
Location: London
Posts: 195

United Kingdom 2012 Range Rover Westminster TDV8 Santorini Black

Many thanks GraemeS

Do you just cancel the cruise before ACC brings you to a stop, or have you switched it off in the CCF?

I noticed from your previous postings that you have "Speed control � Adaptive speed control, stop and go" set.

Post #516010 20th May 2019 10:24pm
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GraemeS



Member Since: 07 Mar 2015
Location: Wagga area
Posts: 939

Australia 2012 Range Rover Autobiography TDV8 Bournville

Coming into urban areas I cancel CC the first time that traffic slows (usually traffic moving slowly entering a particular round-about) and don't use CC again until back into higher speed zones.

Living in and therefore driving mostly in a rural area I upgraded to ACC for use on the open road where I found it tedious to constantly adjust the set speed when behind vehicles doing more or less the speed limit, so would cancel CC then have to constantly check that I hadn't inadvertently exceeded the speed limit.

Post #516040 21st May 2019 7:54am
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