Vehicle in Battery Saver Mode

[oncechance]

I received this message in FP. I have hooked up to a Noco 10a battery tender. WTH?

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[oncechance]

And it's a new battery and charger states fully charged.

 

[Riddick]

How is the charger hooked up? On the negative side don't put it on the battery terminal, should be on BMS lead.

You also need to reset BMS data.

 

[oncechance]

Yes, it's attached to ground on engine well. I reset the BMS when I installed battery a few months ago.

 

[RcFlyer330]

How often do drive the vehicle? and do you get the system off to save battery message when you turn the vehicle off?

 

[oncechance]

How often do drive the vehicle? and do you get the system off to save battery message when you turn the vehicle off?

Not much during the winter. I drive my 2014. When it does get driven, no messages when turned off.

 

[RcFlyer330]

How long since the last time the truck was run?
So I think (someone correct me if i am wrong) that message is just telling you the truck is going into a low power state due to not being driven not because the battery charge is low.

 

[oncechance]

It's been sitting for roughly 2 weeks. Guess I'll need to get it out.

 

[jrhhunter]

How is the charger hooked up? On the negative side don't put it on the battery terminal, should be on BMS lead.

You also need to reset BMS data.

Are you sure? I thought the negative lead just needs to be on a chassis ground. I I do not know WHAT Patt EXACTLY IS the BMS lead.

 

[Riddick]

Are you sure? I thought the negative lead just needs to be on a chassis ground. I I do not know WHAT Patt EXACTLY IS the BMS lead.

Chassis ground is perfectly fine. I should have worded my post differently by stating the negative needs to be on a chassis ground or before the BMS sensor. There is a lead going into the sensor you can hook the negative to. If you place the lead directly on the negative battery terminal the sensor won't pick up at the battery is charging.

 

[Static]

Mine did the same thing after not driving it for a couple weeks, even though I have it on a battery tender. Must just be a timing thing, I took it for a quick spin and everything is back to normal. Battery SOC has been around 95% for a while now, well before the battery saver message popped up.

 

[oncechance]

Mine did the same thing after not driving it for a couple weeks, even though I have it on a battery tender. Must just be a timing thing, I took it for a quick spin and everything is back to normal. Battery SOC has been around 95% for a while now, well before the battery saver message popped up.

I did some research and I think we are on point:

Triggering factors:

• Extended periods of inactivity: Leaving the vehicle parked for several days without driving can trigger battery saver mode.

 

[Fomoco65]

Do a bms reset.

 

[oncechance]

Do a bms reset.

I'll give that a try. I haven't taken out for a drive yet, weather is a little crappy. I know my battery (upgraded to a H7 and yes, I did a BMS reset) is good and on a maintainer but the truck hasn't been driven in three weeks.

 

[Kanuck]

When it gets nicer out, go for a nice 30 to 60 minute drive drive. I wouldn't reset anything.

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