Famousfive
Member Since: 12 Aug 2014
Location: Southampton
Posts: 1831
  
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Not sure what i've done here  but managed to  something up on MY15 D4 that is sat on my drive. Its a lockdown project of either new D4 for me or sell on but that's another thread for later.
I had both a new main and SS battery in December and as its been sat waiting for its MOT and service I've been in and out of it periodically and kept battery on CTEK charging. On Sunday I started car with CTEK still attached and ever since get the Charging System Fault. 
Here is what the IID is showing
Quote:GWM-Gateway module
• P0A1A-87 (2F) Generator control module - Bus signal/message failure - missing a message
Seen a few threads but wondered where to start troubleshooting (and hoping not alternator)
https://disco4.com/forum/charging-system-fault-192527.html Stolen - D4 Loire Blue
D4 Bali Blue
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 26th Jan 2021 4:46 pm |
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robsta
Member Since: 19 Mar 2011
Location: La Lucia, Durban
Posts: 52
 
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Hello
Is this issue resolved. I had the same after I replaced my battery a few years ago. Eventually found a thin wire, covered in a black sheath leading from the + (positive) terminal to a computer box which had been pinched somehow and broke. Although the battery was charging as normal, I still had the same warning come on. Rejoined or reconnected the wire and fault cleared. Previously Freelander II
Previously '08 Disco 3 TDV6 SE
Previously '10 Disco4 TDV / SDV6 HSE
Now: '12 Freelander II SD4 HSE -
Now '11 Disco4 V8 HSE
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| 11th Feb 2021 9:47 am |
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eightfoot
Member Since: 12 Apr 2015
Location: sunny essex
Posts: 806
  
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| Re: Charging System fault |
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Famousfive wrote:Not sure what i've done here but managed to something up on MY15 D4 that is sat on my drive. Its a lockdown project of either new D4 for me or sell on but that's another thread for later.
I had both a new main and SS battery in December and as its been sat waiting for its MOT and service I've been in and out of it periodically and kept battery on CTEK charging. On Sunday I started car with CTEK still attached and ever since get the Charging System Fault.
Here is what the IID is showing
Quote:GWM-Gateway module
• P0A1A-87 (2F) Generator control module - Bus signal/message failure - missing a message
Seen a few threads but wondered where to start troubleshooting (and hoping not alternator)
https://disco4.com/forum/charging-system-fault-192527.html
did you reset the batt monitering system ? please excuse any grammer/punctuation mistakes,i'm thick,thankyou
current vehicles 2005 d3 2013 d4
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| 11th Feb 2021 10:20 am |
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Famousfive
Member Since: 12 Aug 2014
Location: Southampton
Posts: 1831
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robsta wrote:Is this issue resolved. I had the same after I replaced my battery a few years ago. Eventually found a thin wire, covered in a black sheath leading from the + (positive) terminal to a computer box which had been pinched somehow and broke.
I've looked at the wire battery side and it looks ok but i'll trace all the way the to the module to be sure 
eightfoot wrote:did you reset the batt monitering system ?
Yes on main and ss battery and did again after error.
I drove round the block after it first appeared and it went away but now its back and doesn't go away.
I've noticed that the heated steering wheel and heated seats don't work now either...couldn't see any issues with fuses...
hoping that its a wire pinched and not a new alternator as this project is starting to keep me awake at night! Stolen - D4 Loire Blue
D4 Bali Blue
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| 11th Feb 2021 11:00 am |
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robsta
Member Since: 19 Mar 2011
Location: La Lucia, Durban
Posts: 52
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Hello again
Something I found with the Disco4 which my 3 did not do. As soon as you have some sort of low voltage, the electrical system starts shedding some optional extras. such as the MOT, the heated seating etc. Have you looked at the voltage the alternator is providing via the MOT screen.
You would need to enter the hidden menu and then go to vehicle signals. Will give you the voltage sensed after the voltage regulator. If it is low, then it could be the alternator. BUT...On my V8, when my alternator packed up...sounded like a supercharger about to explode, I had no warning indications, or charging faults, just saw the voltage was down to 11,7v, and shortly thereafter a Low Battery warning.
Good Luck Previously Freelander II
Previously '08 Disco 3 TDV6 SE
Previously '10 Disco4 TDV / SDV6 HSE
Now: '12 Freelander II SD4 HSE -
Now '11 Disco4 V8 HSE
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| 15th Feb 2021 10:52 am |
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Famousfive
Member Since: 12 Aug 2014
Location: Southampton
Posts: 1831
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As diagnosed by the masses - the alternator was intermittently failing which was causing this error.
To be swapped out this week all being well Stolen - D4 Loire Blue
D4 Bali Blue
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| 6th Apr 2021 4:31 pm |
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robsta
Member Since: 19 Mar 2011
Location: La Lucia, Durban
Posts: 52
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Hello
Glad you found the fault....Seems to have been similar to mine.
Regards Previously Freelander II
Previously '08 Disco 3 TDV6 SE
Previously '10 Disco4 TDV / SDV6 HSE
Now: '12 Freelander II SD4 HSE -
Now '11 Disco4 V8 HSE
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| 7th Apr 2021 12:55 pm |
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We88ie
Member Since: 08 Mar 2021
Location: Liverpool
Posts: 14
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Must be something in the air. Same thing charging warning then limp mode.
In having new one fitted as we speak. Had low battery warning but resolved after a good drive.
G. ______________________
Current: D4 HSE
Current: Defender 110 D300SE Hardtop
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| 7th Apr 2021 5:16 pm |
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