wired1000
Posts: 9
Joined: Mon Feb 03, 2014 11:41 am
Delivery Date: 23 Jan 2014

Re: Power Steering Works Intermittently... ideas?

Sat Oct 21, 2017 6:11 am

Whoops... thanks.

wired1000
Posts: 9
Joined: Mon Feb 03, 2014 11:41 am
Delivery Date: 23 Jan 2014

Re: Power Steering Works Intermittently... ideas?

Sat Oct 21, 2017 6:15 am

Any thoughts on the fault codes though?

GerryAZ
Gold Member
Posts: 1463
Joined: Mon Nov 22, 2010 6:47 pm
Delivery Date: 12 Jun 2011
Location: Phoenix, AZ

Re: Power Steering Works Intermittently... ideas?

Sat Oct 21, 2017 6:46 am

The only error code for the EPS (electric power steering) is battery voltage. The power steering runs from the 12-volt battery so double check the battery voltage, negative ground connections (I found an issue with the chassis ground on my 2011), and all wiring harness connections associated with the power steering unit. Since your problem was intermittent at first, there is likely a loose connection somewhere in the 12-volt circuit.

Edited to add: If you connected the booster battery directly to positive and negative terminals of the LEAF battery, a loose or corroded chassis ground connection would still cause voltage drop to the auxiliary systems in the car. Use your multimeter to check the chassis ground connection by measuring the voltage between the negative battery post and the body of the car with the car in Park, parking brake set, in Ready mode, and with high beam headlights on. Any voltage reading higher than about 0.2 or 0.3 volts is cause for concern. Voltage from positive battery post to car body under these conditions should be about 13.0 volts (or higher if ambient temperature is low). I found paint under the chassis ground connection of the negative battery cable (it looks like a cable support clamp, but is actually the ground connection) so the actual ground connection was only through the threads of the bolt. I removed paint under the lug to provide more electrical contact area and reduce the voltage drop in that ground connection.

I suggest that you clear all of the codes and see which ones come back. The HVAC error codes associated with the EV system could be concerns if they come back.
Last edited by GerryAZ on Sat Oct 21, 2017 7:31 am, edited 2 times in total.
Gerry
Silver LEAF 2011 SL rear ended (totaled) by in-attentive driver 1/4/2015 at 50,422 miles
Silver LEAF 2015 SL purchased 2/7/2015

DaveinOlyWA
Gold Member
Posts: 12243
Joined: Sat Apr 24, 2010 7:43 pm
Delivery Date: 10 Nov 2016
Leaf Number: 314199
Location: Olympia, WA
Contact: Website

Re: Power Steering Works Intermittently... ideas?

Sat Oct 21, 2017 7:06 am

LeftieBiker wrote:I second the voltage check. Dealerships are used to installing partially-charged 12 volt batteries in ICEs, because the car will immediately charge it right up. Not the case with the Leaf, of course. Nissan should have instructed their dealers to always fully charge replacement 12 volt batteries before installing them, but I doubt that they did.


In a lead acid battery???

Cmon Man!!
2011 SL; 44,598 miles. 2013 S; 44,840 miles.2016 S30 (build 10/2016)"low water marks" 26,100.2 miles.363GID Ahr 79.55Hx95.35%kwh28.1QCs227,L2's 237
My Blog; http://daveinolywa.blogspot.com" onclick="window.open(this.href);return false;

LeftieBiker
Posts: 7202
Joined: Wed May 22, 2013 3:17 am
Delivery Date: 31 May 2013
Location: Upstate New York, US

Re: Power Steering Works Intermittently... ideas?

Sat Oct 21, 2017 11:20 am

Have you been drinking? There is nothing funny about what I wrote. Lead-acid batteries lose charge on the shelf, often a lot of charge. Since ICE cars will charge them right up to full with an hour or two of driving, service technicians usually skip charging them. The Leaf doesn't provide a strong enough charge to top off a battery that is down 25% or more if the driver's habits don't allow for long charging periods while driving. Do I need to use smaller words...?
2013 "Brilliant Silver" SV with Premium Package and no QC, and 2009 Vectrix VX-1 with 18 Leaf cells.

The most offensive, tasteless phrase in use here is "Pulled the trigger." I no longer respond to posts that use it.

GerryAZ
Gold Member
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Joined: Mon Nov 22, 2010 6:47 pm
Delivery Date: 12 Jun 2011
Location: Phoenix, AZ

Re: Power Steering Works Intermittently... ideas?

Sat Oct 21, 2017 6:12 pm

LeftieBiker wrote:Have you been drinking? There is nothing funny about what I wrote. Lead-acid batteries lose charge on the shelf, often a lot of charge. Since ICE cars will charge them right up to full with an hour or two of driving, service technicians usually skip charging them. The Leaf doesn't provide a strong enough charge to top off a battery that is down 25% or more if the driver's habits don't allow for long charging periods while driving. Do I need to use smaller words...?


DC-DC converters in both my 2011 and 2015 deliver at least 80 amperes to a discharged battery. They would easily charge a depleted battery (that is not defective and will accept current) in an hour of driving or while charging the traction battery overnight. I have NEVER used an external charger on the 12-volt battery in a LEAF. I just drove the car and charged the traction battery normally after either jump starting when the battery was drained or after replacing a defective battery.
Gerry
Silver LEAF 2011 SL rear ended (totaled) by in-attentive driver 1/4/2015 at 50,422 miles
Silver LEAF 2015 SL purchased 2/7/2015

LeftieBiker
Posts: 7202
Joined: Wed May 22, 2013 3:17 am
Delivery Date: 31 May 2013
Location: Upstate New York, US

Re: Power Steering Works Intermittently... ideas?

Sat Oct 21, 2017 9:18 pm

And whenever I connect my maintainer - which is often - the battery is usually down two or more amp-hours. The degree to which the charging system maintains the 12 volt battery is all over the map, depending on year and driving habits. It would then be foolish to just assume, at least on pre-2015 cars, that a new 12 volt battery, especially one that is older stock, would get fully charged after installation. Charging it up is cheap insurance.
2013 "Brilliant Silver" SV with Premium Package and no QC, and 2009 Vectrix VX-1 with 18 Leaf cells.

The most offensive, tasteless phrase in use here is "Pulled the trigger." I no longer respond to posts that use it.

DaveinOlyWA
Gold Member
Posts: 12243
Joined: Sat Apr 24, 2010 7:43 pm
Delivery Date: 10 Nov 2016
Leaf Number: 314199
Location: Olympia, WA
Contact: Website

Re: Power Steering Works Intermittently... ideas?

Sun Oct 22, 2017 1:57 pm

LeftieBiker wrote:Have you been drinking? There is nothing funny about what I wrote. Lead-acid batteries lose charge on the shelf, often a lot of charge. Since ICE cars will charge them right up to full with an hour or two of driving, service technicians usually skip charging them. The Leaf doesn't provide a strong enough charge to top off a battery that is down 25% or more if the driver's habits don't allow for long charging periods while driving. Do I need to use smaller words...?

Maybe where u live dealers are ok with ruining batteries and eating the loss but here batteries are topped off regularly to insure they don't suffer permanent loss.

Lead acid has to be stored at full charge
2011 SL; 44,598 miles. 2013 S; 44,840 miles.2016 S30 (build 10/2016)"low water marks" 26,100.2 miles.363GID Ahr 79.55Hx95.35%kwh28.1QCs227,L2's 237
My Blog; http://daveinolywa.blogspot.com" onclick="window.open(this.href);return false;

LeftieBiker
Posts: 7202
Joined: Wed May 22, 2013 3:17 am
Delivery Date: 31 May 2013
Location: Upstate New York, US

Re: Power Steering Works Intermittently... ideas?

Sun Oct 22, 2017 3:03 pm

Assuming that all dealerships follow best practices is naive at best. In the case of Nissan dealerships it's...misguided.
2013 "Brilliant Silver" SV with Premium Package and no QC, and 2009 Vectrix VX-1 with 18 Leaf cells.

The most offensive, tasteless phrase in use here is "Pulled the trigger." I no longer respond to posts that use it.

wired1000
Posts: 9
Joined: Mon Feb 03, 2014 11:41 am
Delivery Date: 23 Jan 2014

Re: Power Steering Works Intermittently... ideas?

Sun Oct 22, 2017 5:47 pm

Tomorrow's my day off... will check voltages and connections as recommended.

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