![]() | Home > Technical (L322) > L322 2010 4.4 tdv8 gearbox fault |
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Haylands Member Since: 04 Mar 2014 Location: East Yorkshire Posts: 8230 ![]() ![]() ![]() |
How long had the car been off..?? 12.6 is a fully charged battery, I bet this is dropping overnight, as you turn on the ignition, the gearbox ECU reads the voltage as low and chucks the fault up.... ?? Pete
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Haylands Member Since: 04 Mar 2014 Location: East Yorkshire Posts: 8230 ![]() ![]() ![]() |
Probably the battery then, it's certainly the cheapest thing to try first anyway... |
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Shawser1203 Member Since: 29 Jul 2017 Location: Aberdeenshire Posts: 88 ![]() ![]() ![]() |
Exactly, process of elimination. Cheapest thing first. |
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GGDR Member Since: 26 Nov 2016 Location: London Posts: 3544 ![]() ![]() ![]() |
even cheaper is a system discharge / battery reset.
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diesel Dave Member Since: 14 Aug 2015 Location: Stockport Posts: 455 ![]() ![]() ![]() |
I was getting similar readings to that, but as Haylands says it's probably losing some power overnight, and once they get weak and you turn the key its game over as the voltage drops right down. |
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Shawser1203 Member Since: 29 Jul 2017 Location: Aberdeenshire Posts: 88 ![]() ![]() ![]() |
How do you do the system reset and discharge? |
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Haylands Member Since: 04 Mar 2014 Location: East Yorkshire Posts: 8230 ![]() ![]() ![]() |
It's in the WIKI, just a battery disconnection procedure, worth a try but don't hold your breath...! Pete
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Shawser1203 Member Since: 29 Jul 2017 Location: Aberdeenshire Posts: 88 ![]() ![]() ![]() |
I think I've tried that. Taking battery leads off, then touching them together? |
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Shawser1203 Member Since: 29 Jul 2017 Location: Aberdeenshire Posts: 88 ![]() ![]() ![]() |
Just got old battery out. There was a label on the breather pipe on old battery dated 18/11/2010 |
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Shawser1203 Member Since: 29 Jul 2017 Location: Aberdeenshire Posts: 88 ![]() ![]() ![]() |
Oh well new battery in, no difference. |
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Shawser1203 Member Since: 29 Jul 2017 Location: Aberdeenshire Posts: 88 ![]() ![]() ![]() |
Also I checked new battery charge percentage it was 70%. After I fitted it, I did the battery replacement on diagnostic tool. After that I put charger back on and it was 50%. Getting a replacement tomorrow to see if its the new battery. |
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Shawser1203 Member Since: 29 Jul 2017 Location: Aberdeenshire Posts: 88 ![]() ![]() ![]() |
Got new battery today. Still the same message. Also noticed not going into low box. |
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Shawser1203 Member Since: 29 Jul 2017 Location: Aberdeenshire Posts: 88 ![]() ![]() ![]() |
Lo box working, didn't do procedure correctly. |
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stu1 Member Since: 06 Dec 2013 Location: UK Posts: 276 ![]() ![]() ![]() |
Interesting - I would have expected a displayed gearbox fault message to have logged at least one DTC indicating as to why it was showing you the message - what did you read the codes with? |
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