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alex0264
Member Since: 16 Apr 2012
Location: Taunton
Posts: 136
  
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| New battery / BMS query plus cold start issue |
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Good morning all and happy new year to you. I have a couple of queries I would like to run past you please. I will add that the car is under warranty, and I will be contacting the garage when they are open again.
The main vehicle battery failed on me Christmas day - just after we had loaded everything up! Luckily we have another car so that wasn't a problem, and I knew the battery had problems anyway. I decided not to cut any corners and purchased a genuine LR094642 battery and fitted it on Thursday, problem solved. The question I have is that I replaced a Lucas 95Ah 800CCA battery and the car was configured for a 950CCA battery. The genuine LR battery I have fitted is rated for 850CCA, but my GAP IID tool doesn't seem to have an option for this capacity of battery, so I have left it on 950CCA. I did do the BMS reset for the main battery in the CCF menu, so perhaps I don't need to do anymore with it?
The second thing is an odd issue I'm experiencing when starting the car from cold. I press the start/stop button and wait for a few seconds, then I press the brake pedal and the start/stop button, the blower motors turn off, the glow plug light illuminates for around 2-3 seconds, then the car starts. I should add that the glow plug light never illuminates, only when this happens which I find a bit odd. I never experienced this issue with my previous two D4s, so I'm a bit worried, but I guess it's still under warranty so all should be well.
Many thanks
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 1st Jan 2024 11:49 am |
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eightfoot
Member Since: 12 Apr 2015
Location: sunny essex
Posts: 806
 
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when you start from cold all you need to do is press the brake pedal then the start button you don't need to hold the button in i don't quite understand why you press the button first the press the brake then press the button again that's not necessary please excuse any grammer/punctuation mistakes,i'm thick,thankyou
current vehicles 2005 d3 2013 d4
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| 1st Jan 2024 12:15 pm |
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alex0264
Member Since: 16 Apr 2012
Location: Taunton
Posts: 136
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I always press the button first - it's the equivalent of turning the key to the ignition position before starting. I've always done this to ensure the glow plug light has gone out before attempting to start the vehicle. ------------------------------------------------------------------------------------
2016 - D4 HSE Luxury Scotia Grey - Pending...
2014 - D4 HSE Indus Silver - A total mystery
2011 - D4 HSE Stornoway Grey - Legendary car
2006 - D3 HSE Buckingham Blue - Moneypit v1
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| 1st Jan 2024 12:18 pm |
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eightfoot
Member Since: 12 Apr 2015
Location: sunny essex
Posts: 806
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you don't need to just foot on brake press button and release then the glow plug cycle will start and you will get a delay until the starter cranks depending on how long the glow plugs need
when you want to turn the ignition on without starting you press the button without your foot on the brake pedal (glow plugs don't cycle)
have a look in the owners handbook it will explain, I've had my d4 for 5yrs now that's how mines always worked
ps just reread your fist post prob saved you an embarrassing conversation with you local dealer lol  please excuse any grammer/punctuation mistakes,i'm thick,thankyou
current vehicles 2005 d3 2013 d4
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| 1st Jan 2024 12:32 pm |
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Gary_P
Member Since: 03 May 2016
Location: Kent
Posts: 1664
 
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| Re: New battery / BMS query plus cold start issue |
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Quote:
The second thing is an odd issue I'm experiencing when starting the car from cold. I press the start/stop button and wait for a few seconds, then I press the brake pedal and the start/stop button, the blower motors turn off, the glow plug light illuminates for around 2-3 seconds, then the car starts. I should add that the glow plug light never illuminates, only when this happens which I find a bit odd. I never experienced this issue with my previous two D4s, so I'm a bit worried, but I guess it's still under warranty so all should be well.
This is normal behaviour for the car. As has been stated no need to press the start button before putting foot on brake. After you press it the first time, you're effectively turning the ignition off by pressing again. I guess holding it in on the second press with the brake pedal eventually turns it all back on again and starts the car.
Sorry, can't answer your query ref battery. I thought the correct battery was 950.
Cheers[/quote] Gary
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Discovery 4 HSE 2016MY
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| 1st Jan 2024 2:23 pm |
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faulksy
Member Since: 24 Dec 2023
Location: powys
Posts: 338
 
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alex0264 wrote:I always press the button first - it's the equivalent of turning the key to the ignition position before starting. I've always done this to ensure the glow plug light has gone out before attempting to start the vehicle.
i always do that when its cold. but now i will do it the proper way  had a d1 ,d2 a land mark d4 for 3 days now have awsome d4 in orkney grey hse sdv6 my12
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| 5th Jan 2024 7:19 pm |
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HairyFool
Member Since: 04 Jan 2023
Location: North Essex
Posts: 676
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The ECU won't turn on the glow plugs unless an actual Start has been requested.
A traditional key would have 0/1/2/3 (Start) positions with the Start spring loaded. Yes 2 would allow you to preheat the glow plugs before turning further against the spring to engage the starter.
The Start button with no brake is position 1 not 2, 2 is button + brake and the ECU automatically goes to 3 once initial tests are complete and the glow plugs are up to temp. It is impossible for the starter motor to engage unless they are hot. A visitor from the dark side, my other vehicle is an is still an EV. Strictly speaking its SWMBO.
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| 5th Jan 2024 8:59 pm |
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faulksy
Member Since: 24 Dec 2023
Location: powys
Posts: 338
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tried it correctly today before doing the turbo bypass mod.
started is per instructions, it didn't start immediately, it waited untill the glow light went off then tuned over. approx 2 second delay then all was good had a d1 ,d2 a land mark d4 for 3 days now have awsome d4 in orkney grey hse sdv6 my12
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| 6th Jan 2024 7:34 pm |
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Gary_P
Member Since: 03 May 2016
Location: Kent
Posts: 1664
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Yes, that's exactly what mine does this time of year. I guess it's waiting for glow plugs to heat. In the summer when it's warmer , the time between pressing the button and starting is almost nothing. Gary
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Discovery 4 HSE 2016MY
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| 6th Jan 2024 7:46 pm |
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faulksy
Member Since: 24 Dec 2023
Location: powys
Posts: 338
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had a d1 ,d2 a land mark d4 for 3 days now have awsome d4 in orkney grey hse sdv6 my12
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| 6th Jan 2024 9:17 pm |
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alex0264
Member Since: 16 Apr 2012
Location: Taunton
Posts: 136
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This was a definite learning curve, no surprise it was operator error on my part! Needless to say now I depress the brake pedal and then press the button, wait a few seconds and off it goes. Honestly, these forums are worth their weight in gold, even just for sanity checking sometimes it is so helpful. Thanks all ------------------------------------------------------------------------------------
2016 - D4 HSE Luxury Scotia Grey - Pending...
2014 - D4 HSE Indus Silver - A total mystery
2011 - D4 HSE Stornoway Grey - Legendary car
2006 - D3 HSE Buckingham Blue - Moneypit v1
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| 28th Feb 2024 3:41 pm |
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