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Monday, March 29, 2010

EVA Meeting this Saturday - Telsa Motors

San Francisco Electric Vehicle Association
Saturday, April 3rd, 11am-1pm
Right here at LG

Tesla Motors to present on the latest and greatest, from the Roadster to the Model S.
Chapter elections also to be held.

Read up on TeslaMotors.com

(pic from LG’s field trip to the Tesla service facility, Menlo Park, CA, last August)


Carolyn's avatarPosted by Carolyn Permalink Categories: Community »

Thursday, March 25, 2010

Sneak peek: LG 2.0

As some of you already know, LG will be moving to a new location, 475 9th St, beginning in May!  This is a very exciting time with huge potential for the great things we’ve already got going.

A few comments: First, because we’re adding two more lifts, rest assured there will be no lost workdays.  We’ll transfer essentials from Clementina the first weekend in May and then move our current lifts afterwards.  In short, no disruption of services!  Second, I am compelled to share that this new shop, while 3 times larger in workspace, will actually cost us LESS money in rent due to the tremendous shift in the SF commercial real estate market since we opened 3 years ago.  Our lease was up for renewal here; upon finding this new spot, there was no looking back.  So while we are thrilled to be upgrading our facility, there will be absolutely no increase in cost to our customers.  If anything we hope to be more efficient in the new space, with room to accommodate more items in bulk, and therefore lower our costs.

There is still a lot to be done.  Stay tuned here for more info on the green building features and other news; all customers will be notified multiple times before the move occurs, so don’t worry about losing track of us.  For now, it’s fun to get a sneak peek:

Cameo of Kevin Main of KLM Utilities.
Construction courtesy of Cardea Building Co.

Lots more info to come…

Questions, comments, encouragements, don’t hesitate to use the contact page!

Carolyn's avatarPosted by Carolyn Permalink Categories: Facility »

LG in Motor Trade magazine

“A Repairer of the Future: Luscious Garage”, the cover plus a two page spread!  Thanks John Chapman for including us on your US tour and for bringing the news about green auto repair back to South Australia.

More on the Motor Trade Association:  mta.sa.asn.au


John and Luscious back in November:


Carolyn's avatarPosted by Carolyn Permalink Categories: LG in the News »

Toyota Prius code P3030 “High Voltage Line Snapped”

First generation Prius (model years 2001, 2002, 2003) typically need a new battery by 150,000 miles, depending on how often they are driven.  When the cars are driven regularly (every day, for instance) the batteries tend to last longer; we have several customers with the original battery well over 220k miles.  Cars driven rarely can need batteries sooner. image But it’s impossible to predict.  For more information on battery failure, click here.

However, since battery replacement is common, when HV problems arise it is equally common that the battery is condemned prematurely.  This is the case of two DTCs (diagnostic trouble codes) P3009 and P3030.  If your car has either of these codes, we can repair the car for MUCH LESS MONEY while confirming that the battery itself is still usable.  The following blog is dedicated to P3030.

For more information on P3009 related to the battery, click here.
For more information on P3009 related to the transmission, click here.

imageP3030 translates to “High Voltage Line Snapped”.  It sets whenever the HV Battery ECU detects an open circuit to one of the battery blocks.  The Prius battery has bus bars that run down either side of the pack, to connect the modules in series; on one side of the battery it also runs “sensing wires” to each bus bar (effectively monitoring every two modules, which it calls a “block”).  This is how the computer keeps track of total battery voltage (by summing the values of all the blocks) and the balance of those blocks. 

(Pic of “freeze frame”, a data snapshot, when P3030 set. Note the loss of voltage reading at block 10 (0.83v), but also that the car substitutes a max voltage value (20v) at the previous block, 9.  I am not sure why this is the case, but it happens at whatever block is just before the one with the broken wire.  I assume it has something to do with how the ECU calculates voltage from one block to the next, but it also makes sense that it would max another value to help compute total battery voltage.)

imageAt this point you know there is a broken or corroded circuit in the harness, creating an open.  The sensing circuits are very small 22 gauge wires connected to thin flat tabs that mount at the bus bars, which are easily fractured. 

The fracture can be fine enough to create intermittent continuity or simply increase resistance in the circuit, such that the Battery ECU confuses the reduced voltage for a weakened cell. In this case the vehicle will also set DTC P3006.  This is VERY VERY important because most techs will interpret P3006 as a bad battery at face, when really the problem is the sensing wire.

Being able to differentiate between a valid P3006 and a bogus one is, frankly, a matter of experience: how many battery failures has a technician seen?  Does this look like a typical weak battery or are the values strong, with only occasional voltage drop outs?  The “signature” of a failing battery is wide voltage swings under load (heavy assist or heavy regen) either between blocks or across the battery as a whole. 

imageWhether the issue is a harness or the whole battery (or corrosion versus a whole battery, such as DTC P3009), the dealer approach is just replace the whole thing.  After all, a new battery will include a new harness, and have no corrosion.  No one will know the difference.  And wasn’t the car going to need it soon anyway?

Here at LG, we see a worthy and reliable repair.

A new battery—from the dealer or LG—is $3000 out the door.  A rebuilt battery, from LG, is $2365.  Compare that to:

Remove battery cover and inspect: $240
Replace battery harness: $60
New battery harness, Toyota Part Number 82165-47030: $119.35
Sales Tax: $11.34

Total to replace the battery harness: $430.69

Click here to book an appointment

As always we charge $60 to diagnose Prius warning lights, and in this case can confirm battery health as a part of that diagnosis.

Original harness next to replacement:


Sensing tab with almost invisible fracture:


Fracture visible now:


Very delicate sensing wires:


Carolyn's avatarPosted by Carolyn Permalink Categories: Repair »


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