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Discussion Starter · #1 · (Edited)
So, I have absolutely no idea what is going on, on the way to work the car bat completely shut down on me, had to start it back up, then all of a sudden IMA light BATTERY light, VSA and hill assist light came on, out of NOWHERE. Now I’m stuck to figure out why they’d all come on at once. A code p1586 popped up but I have no idea what it is
 

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So, I have absolutely no idea what is going on, on the way to work the car bat completely shut down on me, had to start it back up, then all of a sudden IMA light BATTERY light, VSA and hill assist light came on, out of NOWHERE. Now I’m stuck to figure out why they’d all come on at once. A code p1586 popped up but I have no idea what it is
Replace or load test the under hood battery first. There will be lots of lights and codes when it fails. They last an average of 5 years and usually show issues when the weather gets colder. Once battery is proven good or replaced then research any errors that still exist after x miles or y starts.
 

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Replace or load test the under hood battery first. There will be lots of lights and codes when it fails. They last an average of 5 years and usually show issues when the weather gets colder. Once battery is proven good or replaced then research any errors that still exist after x miles or y starts.
thank you i did see the battery needs to be replaced. but would that pull the IMA code for the junction board? it sounds like they tie together but wanted your opinion
 

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Till under hood battery is known good, then all other things could be or not be and are speculation. Fix battery first then as I said if codes still exist after X miles or Y starts then get code(s) and if IMA Mr. @PeterPerkins can maybe assist in narrowing down the issue. We have seen over the years lots of lights random codes and other issues that all went away when the battery was replaced.

Low under hood battery voltage/capacity can cause false errors. Fix what we know is wrong first.

DO NOT RESET anything till battery is replaced. Replacing the battery may reset things, but do not do anything to force a reset of anything till the battery is known good. You want to retain the codes or have them naturally reoccur or reset on their own.


It is possible it is failing and caused the under hood battery issue, so once the under hood battery is replaced, keep it on a charger maintainer when parked and have the process for that code followed either by you with @PeterPerkins help or at the dealer.

thank you i did see the battery needs to be replaced. but would that pull the IMA code for the junction board? it sounds like they tie together but wanted your opinion
 

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Discussion Starter · #5 ·
Till under hood battery is known good, then all other things could be or not be and are speculation. Fix battery first then as I said if codes still exist after X miles or Y starts then get code(s) and if IMA Mr. @PeterPerkins can maybe assist in narrowing down the issue. We have seen over the years lots of lights random codes and other issues that all went away when the battery was replaced.

Low under hood battery voltage/capacity can cause false errors. Fix what we know is wrong first.

DO NOT RESET anything till battery is replaced. Replacing the battery may reset things, but do not do anything to force a reset of anything till the battery is known good. You want to retain the codes or have them naturally reoccur or reset on their own.


It is possible it is failing and caused the under hood battery issue, so once the under hood battery is replaced, keep it on a charger maintainer when parked and have the process for that code followed either by you with @PeterPerkins help or at the dealer.
Till under hood battery is known good, then all other things could be or not be and are speculation. Fix battery first then as I said if codes still exist after X miles or Y starts then get code(s) and if IMA Mr. @PeterPerkins can maybe assist in narrowing down the issue. We have seen over the years lots of lights random codes and other issues that all went away when the battery was replaced.

Low under hood battery voltage/capacity can cause false errors. Fix what we know is wrong first.

DO NOT RESET anything till battery is replaced. Replacing the battery may reset things, but do not do anything to force a reset of anything till the battery is known good. You want to retain the codes or have them naturally reoccur or reset on their own.


It is possible it is failing and caused the under hood battery issue, so once the under hood battery is replaced, keep it on a charger maintainer when parked and have the process for that code followed either by you with @PeterPerkins help or at the dealer.

So update, replaced the battery, all the lights went away without me clearing them. HOWEVER, something new has happened. i now have to crank it like a regular car to start it instead of it just starting like a crz would. which honestly i don't mind. but i would like to know what that is. the code p1586 is still in the system its just not showing the light anymore
 

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Interesting. I wonder which came first the failed 12v battery or the P1586 disabling the dc-dc and causing the 12v battery to keel over.

I would try resetting the P1586 with a proper code reader that can talk to the IMA. (HDS clone or equivalent.)

If it persists then you will have to do the IMA current sensor diagnostics and/or possibly replace it.

The IMA and probably the dc-dc as will not work with a faulty current sensor.
 

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Discussion Starter · #7 ·
Interesting. I wonder which came first the failed 12v battery or the P1586 disabling the dc-dc and causing the 12v battery to keel over.

I would try resetting the P1586 with a proper code reader that can talk to the IMA. (HDS clone or equivalent.)

If it persists then you will have to do the IMA current sensor diagnostics and/or possibly replace it.

The IMA and probably the dc-dc as will not work with a faulty current sensor.
Thank you for the information! Unfortunately the battery light and IMA light came on at the same time
 
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