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Charging System fault
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Famousfive
 


Member Since: 12 Aug 2014
Location: Southampton
Posts: 1806

Ukraine 2013 Discovery 4 3.0 TDV6 GS Auto Loire BlueDiscovery 4
Charging System fault

Not sure what i've done here Laughing but managed to Censored 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. Evil or Very Mad Evil or Very Mad

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 
 
Post #220553726th Jan 2021 4:46 pm
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Famousfive
 


Member Since: 12 Aug 2014
Location: Southampton
Posts: 1806

Ukraine 2013 Discovery 4 3.0 TDV6 GS Auto Loire BlueDiscovery 4

Looks like heated wheel not working either Neutral

Do we think this is the way to go?

https://www.landroverworld.org/threads/int...ult.30261/
 Stolen - D4 Loire Blue
D4 Bali Blue 
 
Post #220585127th Jan 2021 5:18 pm
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robsta
 


Member Since: 19 Mar 2011
Location: La Lucia, Durban
Posts: 52

South Africa 2011 Discovery 4 5.0 V8 HSE Auto Alaska WhiteDiscovery 4

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 
 
Post #220964111th Feb 2021 9:47 am
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eightfoot
 


Member Since: 12 Apr 2015
Location: sunny essex
Posts: 760

United Kingdom 2005 Discovery 3 TDV6 S Auto Bonatti GreyDiscovery 3
Re: Charging System fault

Famousfive wrote:
Not sure what i've done here Laughing but managed to Censored 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. Evil or Very Mad Evil or Very Mad

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 
 
Post #220964911th Feb 2021 10:20 am
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Famousfive
 


Member Since: 12 Aug 2014
Location: Southampton
Posts: 1806

Ukraine 2013 Discovery 4 3.0 TDV6 GS Auto Loire BlueDiscovery 4

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 Thumbs Up

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 
 
Post #220967011th Feb 2021 11:00 am
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robsta
 


Member Since: 19 Mar 2011
Location: La Lucia, Durban
Posts: 52

South Africa 2011 Discovery 4 5.0 V8 HSE Auto Alaska WhiteDiscovery 4

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 
 
Post #221084915th Feb 2021 10:52 am
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Famousfive
 


Member Since: 12 Aug 2014
Location: Southampton
Posts: 1806

Ukraine 2013 Discovery 4 3.0 TDV6 GS Auto Loire BlueDiscovery 4

As diagnosed by the masses - the alternator was intermittently failing which was causing this error.

To be swapped out this week all being well Thumbs Up
 Stolen - D4 Loire Blue
D4 Bali Blue 
 
Post #22227746th Apr 2021 4:31 pm
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robsta
 


Member Since: 19 Mar 2011
Location: La Lucia, Durban
Posts: 52

South Africa 2011 Discovery 4 5.0 V8 HSE Auto Alaska WhiteDiscovery 4

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 
 
Post #22229537th Apr 2021 12:55 pm
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We88ie
 


Member Since: 08 Mar 2021
Location: Liverpool
Posts: 14

United Kingdom 2010 Discovery 4 3.0 TDV6 HSE Auto Zambezi SilverDiscovery 4

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.
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Post #22230107th Apr 2021 5:16 pm
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