Battery light on. Alternator D2 td5 - Land Rover Forums : Land Rover and Range Rover Forum
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post #1 of 7 (permalink) Old 07-20-2019, 03:17 PM Thread Starter
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Battery light on. Alternator D2 td5

Hi All. I have a discovery 2 td5. Battery light has appeared on the dash whilst car is running. At the time I lost power steering and my brakes became hard and inactive. I had the alternator changed a couple months ago and I did an alternator test whilst running by disconnecting the negative terminal on the battery which killed the engine. Is it the alternator? Thanks in advance.
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post #2 of 7 (permalink) Old 07-20-2019, 11:23 PM
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It seems that your drive belt is gone hence the steering and brake problems

My friends call me Fery

2000 Discovery Td5 ES manual

Hawkeye v.6, Nanocom EVO,
VDM UCANDAS, oscilloscope


if you think my english is peculiar it means you didnt hear my japanese

ALL MY ADVICES ARE BASED ON MY OWN KNOWLEDGE AND MY WAY OF UNDERSTANDING THE DESCRIPTION AND OPERATION OF SYSTEMS... I'M NOT A LAND ROVER TRAINED SPECIALIST JUST AN ADDICTED ENTHUSIAST.
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post #3 of 7 (permalink) Old 07-21-2019, 02:01 AM Thread Starter
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Hi and thanks! Yep you got it in one. From the top the belt looked on. From below, it was off. At the time it was getting dark and missed it completely. Cut it off and have a replacement belt ready to go. Tomorrow’s project.
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post #4 of 7 (permalink) Old 07-21-2019, 06:30 PM
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I learned if you have an alarm it's very important not to let the battery get below 12 volts or the alarm may continuously sound.

My battery drained below 12volts. After hours of fiddling and self diagnosis and dealing with the dealership I was forced to replace the ECU, BCU, and Instrument Cluster. I also discovered (with no recognition or thanks from even 1 member) that Land Rover does not manufacture new BCU's anymore for the Discovery II. They have been looking for a new supplier since Valeo in France stopped manufacturing these. All their existing stock as been sold off. All of this was told to me by the Land Rover dealership.

You cannot replace the BCU with a used BCU because there is no way to reprogram it. The only option is to get a BCU ECU and Instrument Cluster from a junkyard car until supply dry's up. Again - if your battery falls below 12 volts and your alarm goes off - this may happen to you.

It's a pain to replace it for something so preventable. So if you're battery is low or acting up its important to treat it like an emergency.

Other Land Rover owners are going to find out about this soon.

1999 LR DII Performance Package with various Mods
Valentine One
Passport 9500ix
6 x Anti-Theft Camera System
2 x Anti-Theft Tracking devices
Veil Laser Paint
Anti-Laser Police Laser Jammer (5 heads + Dragon Eye protection) + Parking Sensors
Police Scanner + Waze
Powerful Pro-tuned CB-Radio with Fire-Stik
Remote+Hardwired License Plate Concealer
Armormax Bullet Proof Glass
Armormax Caltrop Deployment System
Steel Undercarriage Guards (Steering, Diff axles, Gas tank)
Voyager Roof Rack+six Jerrycans and five stacked Rotopax
Maxxis Razr Offroad Tires+Lift+LED bar
Allisport UK Aluminum Radiator
Allisport UK aluminum coolant tank with sight glass and coolant level sensor
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post #5 of 7 (permalink) Old 07-21-2019, 11:18 PM
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Originally Posted by WLADiscoII99 View Post
You cannot replace the BCU with a used BCU because there is no way to reprogram it....
Sorry that i have to contradict you again but that information is completely WRONG. Any used BCU is completely reprogrammable with dedicated tester, the only condition is to not be removed from an immobilised vehicle. I've fitted used BCUs not once and they all work, it's a max 10 minute job to program it including the fob's syncronisation.

also if the battery goes flat it's enough to replace it with a new one or charge it to full then unlock with the fob, or if the fob doesnt work it can be remobilised with the EKA code no need to replace any ECU and the instrument cluster has nothing to do with that whatsoever.

My friends call me Fery

2000 Discovery Td5 ES manual

Hawkeye v.6, Nanocom EVO,
VDM UCANDAS, oscilloscope


if you think my english is peculiar it means you didnt hear my japanese

ALL MY ADVICES ARE BASED ON MY OWN KNOWLEDGE AND MY WAY OF UNDERSTANDING THE DESCRIPTION AND OPERATION OF SYSTEMS... I'M NOT A LAND ROVER TRAINED SPECIALIST JUST AN ADDICTED ENTHUSIAST.
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post #6 of 7 (permalink) Old 07-23-2019, 02:42 AM
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Originally Posted by sierrafery View Post
Sorry that i have to contradict you again but that information is completely WRONG. Any used BCU is completely reprogrammable with dedicated tester, the only condition is to not be removed from an immobilised vehicle. I've fitted used BCUs not once and they all work, it's a max 10 minute job to program it including the fob's syncronisation.

also if the battery goes flat it's enough to replace it with a new one or charge it to full then unlock with the fob, or if the fob doesnt work it can be remobilised with the EKA code no need to replace any ECU and the instrument cluster has nothing to do with that whatsoever.
I can only go by my personal experience - then share here.


The Land Rover Dealership, who has the best computer called a test book, told me it was absolutely impossible to reprogram a used BCU. They said it had to be a new BCU and wanted 3 thousand something dollars in parts and service (I have the estimate) plus replacement of the door actuator which they said was malfunctioning - and they refused to guarantee the work. Then I took it to an independent mechanic because they told me via email they could do it with auto-logic for $140. When I got there there she started playing games trying to size me up for a new BCU - which she didn't know couldn't be sourced. The dealer said it was a 6 month wait - when they find a supplier. You can call Land Rover Las Vegas and talk to Gary the sales manager. That's what I was told.

Later the indy shop said they could not program the BCU with an autologic.

I solved this problem myself by reading the forums and getting a used same make and model IC, BCU and ECU from Ebay (the indy shop disagreed and showed complete contempt for this solution when I mentioned it) , disconnecting the battery, and installing all 3 at the same time. The car fired up and works perfectly. The door actuator fixed itself (if there was anything wrong with it) and all scans show no codes present.

The total cost was next to nothing.





Not sure what you're talking about regarding the battery. Not only did I replace the battery with a new one - I bought a Oddessy Marine 4 head for $500 direct from Odessy - the most expensive and biggest battery you can get for the DII without replacing the battery tray - it takes up the entire tray and is really bad-ass. This sucker cranks quick and will run solo for 200 hours with a 2 year storage life.

It did not work. The BCU retains the memory of the alarm trip and it would not stop no matter what I tried. When I pulled the horn fuse Rover shut down after 5 minutes of driving.

I can only go by what happened to me. As I said before I allowed the battery to drain and thought nothing of it. When it got below 12 volts ... the alarm went off (continous horn sounding) when the passenger door was opened. Nothing would work. I tried to replace the BCU with a used one and it didn't work . Only replacing all 3 modules at the same time worked. And like i said before - the dealer says they are totally out of stock AND don't have a supplier for the BCU. I called another dealer in and they said the same thing. This time Valeo was mentioned and that Land Rover is looking for a new supplier to manufacture this part and if they cannot find one it will be discontinued.


I hope I helped some readers by sharing my experience.
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1999 LR DII Performance Package with various Mods
Valentine One
Passport 9500ix
6 x Anti-Theft Camera System
2 x Anti-Theft Tracking devices
Veil Laser Paint
Anti-Laser Police Laser Jammer (5 heads + Dragon Eye protection) + Parking Sensors
Police Scanner + Waze
Powerful Pro-tuned CB-Radio with Fire-Stik
Remote+Hardwired License Plate Concealer
Armormax Bullet Proof Glass
Armormax Caltrop Deployment System
Steel Undercarriage Guards (Steering, Diff axles, Gas tank)
Voyager Roof Rack+six Jerrycans and five stacked Rotopax
Maxxis Razr Offroad Tires+Lift+LED bar
Allisport UK Aluminum Radiator
Allisport UK aluminum coolant tank with sight glass and coolant level sensor
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post #7 of 7 (permalink) Old 07-23-2019, 02:04 PM
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Quote:
I can only go by what happened to me. As I said before I allowed the battery to drain and thought nothing of it. When it got below 12 volts ... the alarm went off (continous horn sounding) when the passenger door was opened. Nothing would work. I tried to replace the BCU with a used one and it didn't work . Only replacing all 3 modules at the same time worked.
All i can say is that IMHO you was unlucky enough to be a victim of main dealer's or other ''specialists's" incompetence or ignorance(sorry for that)... the simple solution was to unlock with the fob to remobilise it once the battery was recharged/changed or remobilise it with the EKA code withoiut changing anything as long as the problem was caused ONLY by the dropped voltage without any other issues... but what do i know after i've remobilised plenty of them just like that, ....let's stress all the owners that if the battery goes flat they'll have to replace the BCU, ECM and IC all together just cos you was ripped off by some schmucks...

i insist : read the WSM/Owner's handbook and learn what EKA code means

P.S Please, mister @WLADiscoII99... from other posts of your's it sems that you are a real D2 enthusiast so you should give a minimal trust to the vehicle's builders/LR engineers that they were not so stupid to let the owners in such mess to replace 3 vital and expensive components(BCU, ECM, IC) just cos the battery went flat for some reason, main dealers dont have enough knowledge about more than 5 years old vehicles anymore nor the desire to fix such old vehicles, they don't care about these, they only want to sell new ones.... it's more simple than what you had to do based on theyr's advice, believe me or not despite of your own saga which was not your fault IMO.

Good luck and my apologies for such ''agressive'' attitude

My friends call me Fery

2000 Discovery Td5 ES manual

Hawkeye v.6, Nanocom EVO,
VDM UCANDAS, oscilloscope


if you think my english is peculiar it means you didnt hear my japanese

ALL MY ADVICES ARE BASED ON MY OWN KNOWLEDGE AND MY WAY OF UNDERSTANDING THE DESCRIPTION AND OPERATION OF SYSTEMS... I'M NOT A LAND ROVER TRAINED SPECIALIST JUST AN ADDICTED ENTHUSIAST.
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