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Old 02-17-2009, 10:04 PM
waw waw is offline
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Undervoltage Consumer Defective

I have a 2002 C320 & I was driving for about 20 minutes or so, & the message
"Undervoltage Consumer Defective" popped up on my screen. What does
that mean? Is there something wrong with my battery?

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Old 02-18-2009, 02:14 AM
compress ignite's Avatar
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Sounds Like German for:

Something (Consumer) is not getting enough Voltage and the Computer thinks
It is (the Under-Voltage Consumer) Defective.
'Don't know whether the computer thinks it's defective due to Low Voltage
Consumption...Or there is not enough Volts being delivered to the UVC.

Or the computer may be trying to tell you It's not getting enough Voltage.
And you are to find the problem and fix it or be hounded into lunacy.

One of those $100,000.00 Mercedes Diagnostic Machines could probably
tell you what's going on

This is an official "Arthur Dalton" type question.

Hey,a Cheapo Multi-Meter from HF (Or Sears on Sale) is only about 12 bucks.

Autozone,Advance,Etc.,Etc.,O'Reillys will all check your charging system
for free.
'84 300SD sold

Last edited by compress ignite; 02-18-2009 at 07:56 PM.
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Old 02-18-2009, 08:00 AM
Join Date: Mar 1999
Location: Tucker, Ga USA
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Most likely a charging system issue.

Many 2002-2005 cars have voltage regulator issues. Bosch made in England part??
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Old 02-18-2009, 06:39 PM
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Oh No!


Are we talking "Lucas Electric" producing regulators under contract for Bosch?

Lucas the "Prince of Darkness"

The Lucas motto: "Get home before dark."

Lucas is the patent holder for the short circuit.

Lucas - Inventor of the first intermittent wiper.

Lucas - Inventor of the self-dimming headlamp.

The three position Lucas switch - Dim, Flicker and Off.

The Original Anti-Theft Device - Lucas Electrics.

Lucas systems actually uses AC current; it just has a random frequency.

Lucas is an acronym for Loose Unsoldered Connections and Splices

Recommended procedure before taking on a repair of Lucas equipment: Check the position of the stars,kill a chicken and walk three times clockwise around your car chanting:" Oh mighty Prince of Darkness protect your unworthy servant.."

"Here is presented for your perusal one Lucas Replacement Wiring Harness Smoke kit, P/N 530433, along with the very rare Churchill Tool 18G548BS adapter tube and metering valve. These kits were supplied surreptitiously to Lucas factory technicians as a trouble-shooting and repair aid for the rectification of chronic electrical problems on a plethora of British cars. The smoke is metered, through the fuse box, into the circuit which has released it's original smoke until the leak is located and repaired. The affected circuit is then rectified and the replacement smoke re-introduced. An advantage over the cheap repro smoke kits currently available is the exceptionally rare Churchill metering valve and fuse box adapter. It enables the intrepid and highly skilled British Car Technician to meter the precise amount of genuine Lucas smoke required by the circuit.

Unlike the cheap, far-eastern replacement DIYsmoke offered by the "usual suppliers", this kit includes a filter to ensure that all the smoke is of consistent size, It has been our experience in our shop that the reproduction Tiawanese smoke is often "lumpy", which will cause excessive resistance in our finely-engineered British harnesses and components. This is often the cause of failure in the repro electrical parts currently available, causing much consternation and misplaced cursing of the big three suppliers.

These kits have long been the secret weapon of the "Ultimate Authorities" in the trade, and this may be the last one available. Be forewarned, though, that it is not applicable to any British vehicle built after the discontinuing of bullet connectors, so you Range Rover types are still on your own...

This Genuine Factory Authorised kit contains enough smoke to recharge the entire window circuit on a 420 Jaguar, and my dear friend and advisor George Wolf of British Auto Specialty assures me that he can replace ALL the smoke in a W&F Barrett All-Weather Invalid Car(147 CC) with enough left over to test a whole box of Wind-Tone horns for escaped smoke. How much more of an endorsement do you need?

More, you say? Well, I once let the smoke out of the overdrive wiring on my friend Roger Hankey's TR3B, and was able to drive over 200 miles home from The Roadster Factory Summer Party by carefully introducing smoke into the failed circuit WITHOUT even properly repairing the leak. Another friend, Richard Stephenson, was able to repair the cooling fan circuit of his Series 1 E-type by merely replacing a fuse and injecting a small quantity of smoke back into the wires. So there!"

Q: Once I have re-introduced smoke into my TR-2, do you warranty that it's system will resume operating at the speed of dark?
A: If you reintroduce the smoke through a microwave oven, you may even go back in time!
Q: I have been very diligent over the years and have maintained the smoke in my Sunbeam's wires perfectly. The problem is that that special Lucas perfume has disappeared from the dash, carpets and seats. In fact, at the last Concours d'Elegance I lost out to a frogeye with period odors. Is the smoke in your kit fresh enough to bring back the OEM smells of burning plastic and bakelite and are you including an adapter to replace same.
A: No adapter needed, but have you tried just STARTING that overrestored trailer queen? It might bring back the aroma by itself.

Q: This has been a most informative thread which set me off thinking about wider global environmental changes that have happened since the mid 70's. Could it be that the copious release of smoke from Lucas wiring looms around that time has significantly contributed to the holes in the ozone layer and the onset of global warming? Could it be that, had your excellent device been more available at that time, we could have saved the planet for future generations instead of fighting a rear guard action? Hindsight is such a wonderful thing isn't it.
A: Hey- This is a serious site- we're not discussing "junk science" like Global Climate Change!
Q: I have a questions. For some time. My object is to restore a the few pre-Chrysler Rootes Sunbeam Tigers to original factory condition, with ALL the LAT racing options. So far, I have been quite successful, but unaware of your Lucas Smoke Kit. I am perplexed as to it's satistactory application to this original British Classic that Mr. Carroll Shelby has enhanced with a lot of Ford (USA) parts. This includes a large portion, but not all, of the electrics. It is very easy to differentiate between the Lucas Parts and the Ford Parts, as the Ford Parts still work. While we can admire Mr. Lucas for the development of the intermittent windshield wiper, the self-dimming lighting system, and the colorful turn signal spark generator, it is unclear whether your offering will work satisfactorily with so much of the electrics originating in the US. Is this device compatible, as the US parts do not show signs of leaking smoke?
A: The Lucas smoke may cause failure of the connecting interstices, the Ford Electrics (although they may appear to work) will Burst into Flame based on some predetermined planned obsolescence scheme from Detroit.
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'84 300SD sold

Last edited by compress ignite; 02-18-2009 at 07:55 PM.
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Old 02-18-2009, 06:55 PM
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Bosch (?Lucas Electric?)

'Cause my "New to Me" 143 Amp Alternator's New Voltage Regulator has the "Mark of Cain" on it...
I wonder if a "German" Bosch Regulator is Available?
Attached Thumbnails
Undervoltage Consumer Defective-screenhunter_09-feb.-18-18.51.jpg   Undervoltage Consumer Defective-screenhunter_06-feb.-18-18.47.gif  
'84 300SD sold
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Old 02-18-2009, 07:57 PM
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Compress! Have pity on all those owners of 1990's Range Rovers with Lucas electrics
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Old 02-19-2009, 12:34 AM
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Don't be too hard on the Lucas folks - on my '77 Jag XJ6 all the electrical problems have been in the wiring modifications made to import the car to the US. I would like to personally award a Rube Goldberg medal to whomever designed the electro-mechanical climate control system, however! It DOES still work, but it's motorial gyrations have to be heard to be believed.
Richard Wooldridge
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Old 02-19-2009, 01:31 AM
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Other side of the Pond


All those tasty tidbits on Lucas were from Albion's side of the Atlantic.

'84 300SD sold
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