SL-Class (R230) 2003 -- 2012: Discussion on the SL500, SL550, SL600

SL/R230: 2003 SL500 R230 error codes

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Old Mar 18, 2009 | 12:01 AM
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Hung Hua's Avatar
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2003 SL500
2003 SL500 R230 error codes

Error codes from 2003 SL500 59K miles. The car is running fine. The AC is working good and providing cold air (39 psi low, 220 psi high, ambient temp 66 F, center vent temp 43 F). I like to fix the error, but can live with them if they are too costly or too hard to fix.

LCP B1010 Control unit faulty. Power supply low
The original 6.5 years old battery will be replaced soon. Should take care of this error code.

AIRCO B1269 CAN communication error with the KLA multifunction sensor.
What does this mean? What are CAN and KLA?

AIRBAG B1315 Child seat recognition. wiring error communication error short circuit to PLUS.
Any idea what to look for? What is PLUS?

PSE B1436 Central locking secure time too long, air capacity too high.
Any idea where to start?

TIA for any help.

Regards
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Old Mar 18, 2009 | 02:33 AM
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2007 SL550
Some I can guess at, others will have to wait for the more knowledgeable folks...

Originally Posted by Hung Hua
What are CAN and KLA?
CAN is the car area network bus. It connects a lot of the interior electronics together. The multifunction display is one part, I'd imagine the locks, power seat settings, etc. are also part of it. Don't know what KLA would be.

Originally Posted by Hung Hua
PSE B1436 Central locking secure time too long, air capacity too high.


I'd imagine this has to do with the vacuum hoses used to lock all the little storage compartments throughout the cabin. Perhaps, after an extended period of time, the car senses (or assumes) that the amount of air leaked into the hoses have decreased the vacuum in the lines to the point where the locks are no longer secure?
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Old Mar 18, 2009 | 09:51 AM
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03 SL500
Replace the battery first.
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Old Mar 18, 2009 | 11:40 AM
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Originally Posted by daltex
Replace the battery first.
+1. A failing battery could be triggering the other codes.
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Old Mar 23, 2009 | 10:07 PM
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Hung Hua's Avatar
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2003 SL500
Compatible 2003 SL500 Mercedes trunk battery?

I purchased a non-Mercedes battery, Energizer, group E48, 700 CCA, 875 CA (32 F) with 3 years replacement and 8 years prorate warrantee. The battery is fully charged but I still get the LCP B1010 error code. Is the battery I bought not compatible?

Regards,
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Old Mar 24, 2009 | 03:54 PM
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03 SL500
Did the other codes clear up?
Have you tried clearing the codes and then rechecking.
Also, I know on later model BMW's, if you are using a diagnostic machine, you need to keep the battery charged with a battery charger while scanning for codes and doing diagnosis code. This is because of the high current draw by the different electronic components.
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Old Mar 24, 2009 | 08:32 PM
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2003 SL500
The LCP B1010 still there with the new battery

You are right about drawing the battery when running the diagnostics with the ignition on. I have a trickle charger connected and I can see that it starts charging once I open the car door. I am not sure if it is the right thing to do by connecting the regular car battery charger to charge the consumer battery while the ignition is on.

As for the error codes they are still there:

LCP B1010 still there even with the new battery.

AIRCO B1269 is still there, at one time I got the B1256 instead of the B1269. B1256 B10/6 evaporator temperature sensor front. A new evaporator temperature sensor is on its way. I am not sure but my guess is that the B1269 could mean that the AC is not running with only the ignition on position and the engine not running.

AIRBAG B1315 seems to only triggered when there is a passenger.

PSE B1436 is till there.
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Old Mar 24, 2009 | 10:08 PM
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03 SL500
I don't think trickle charger is recommended, not on BMW anyways.
Shouldn't be a problem connecting a battery on automatic mode with the ignition on.
Does your Carsoft diagnostic do live time diagnostic.
If it does I would run the tests with the engine running.
Do all these error codes resurface after you clear?
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Old Mar 26, 2009 | 06:56 PM
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Hung Hua's Avatar
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2003 SL500
I keep clear all error codes, but they keep coming back, especially the B1010. Today however, there are only two error codes returned, the LCP B1010 and the AIRCO B1269.

I wonder if the new battery either not compatible or a cell or two is not working, which triggers the LCP B1010.

The new evaporator temperature sensor has arrived. I measured the Ohms and did comparison of the new and the old sensors they seem to be very close, so my AC problem may not be the evaporator sensor. I installed the new sensor anyway, and will keep monitor it when the warm weather comes back.

What could be causing the AC system to stop blowing cold air after a few minutes and blowing hot air instead?
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Old Mar 27, 2009 | 01:51 AM
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If all the functions of the lower control panel (all switches around the gear lever) are working then I wouldn't worry about code B1010, it's likely to be a irrelivant fault.

The A/C code is also a irrelivant fault, usually comes up intermitantly and has no meaning unless it's a current fault. The multifunction sensor is there to get the ambient humidity, and pollution levels. It's mounted in the cabin air intake under the bonnet. They play up occasionally, it does cause a few random A/C problems. I wouldn't say that's your A/C problem based on a fault code alone.

The srs fault (b1315) is probably the child seat sensor in the passenger seat. I would only change the sensor if the SRS warning comes up on the dash with that fault code logged.

The central locking fault is likely to be the boot lock leaking. Clear the fault, check all the soft close doors and boot lid. Also check the multicontour seats to check they work. You'll probably find the soft close boot lid stops working after a few tries. The boot lock in the early R230's does leak quite a bit. It's a bit long winded to do a though check of all pnuematic systems, but it get's the right result every time. Try pluggin the pnuematic line to the boot lock and see if the code comes back, i doubt it would.


Clear all the codes and see what comes back, there are always fault codes's in MB's that mean nothing or only come up using non-gen scanners. No manufacturer will ever admit it but I believe they are deliberately there to through inexperieanced techs and owners off course............keeps my job secure!

Last edited by Ausmbtech; Mar 27, 2009 at 01:55 AM.
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