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SL/R230: DTC for TPS. Where do I star to look to fix?

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Old 02-23-2019, 03:03 PM
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2003 R230
DTC for TPS. Where do I star to look to fix?

I got a Icarsoft MB II and ran the auto check for codes. The TPS system is not sending measurements to the screen for all 4 tires. I am also getting a message that says the screens are malfunctioning. This is the only code I got on the dash from the Icarsoft. What do I need to start looking at?

BTW I also got a message for 2 areas that the unit could not communicate with the ECU and to check connection, if the car had the system and was ignition on. All were good, why no readings?
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Old 02-23-2019, 04:54 PM
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Does your car even have TPMS? I didn't think the early R230s even had it.
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Old 02-23-2019, 05:45 PM
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Originally Posted by Rudeney
Does your car even have TPMS? I didn't think the early R230s even had it.
Mine is 2003 and it does have it. It is listed among other options originally installed in the car. Besides, I actually saw the sensor in the wheel well,
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Old 02-23-2019, 07:37 PM
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Yes it does. Took the car in for the SBC recall work and now the TPMS is not showing any values on the screen.
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Old 02-23-2019, 07:51 PM
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There's been an "A" and I think a "B", so with this thread I've arrived at Exhibit C of why purchasing an iCarsoft product in lieu of Star Diagnosis is a mistake.

Spyder has retrieved a fault code which I believe does not exist in Mercedes literature (Rodney, Alex, please correct me if I am mistaken). With Star Diagnosis a proper code would surely have been reported, and instructions on how to troubleshoot and correct the issue would be at Spyder's fingertips. If needed, electrical schematics and part locating aids would be available as well.
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Old 02-23-2019, 09:11 PM
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B111C is a valid DTC for the ICM:

http://benzbits.com/dtc/R230-ICM.pdf

The SDS diagnostics steps take you through using the special CAN bus diagnostic tools to test it. I think what I'd do is start at the TPMS moduel N88 (in the trunk, left side, by the PSE module) and make sure its wiring is good. Honestly, I can't see how any work on the SBC could affect this.
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Old 02-24-2019, 12:54 AM
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Originally Posted by bobterry99
Spyder has retrieved a fault code which I believe does not exist in Mercedes literature...
B111C is indeed not a valid fault code. But it is a valid event code. Unlike SDS, Spyder's iCarsoft device fails to distinguish faults from events (!), evidently, and I was mislead by the text which describes the event.
Last edited by bobterry99; 02-24-2019 at 12:58 AM.
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Old 02-24-2019, 07:04 AM
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Originally Posted by Rudeney
B111C is a valid DTC for the ICM:

http://benzbits.com/dtc/R230-ICM.pdf

Honestly, I can't see how any work on the SBC could affect this.

I would tend tend to agree. But you never know with electronics. The issue appeared after it was in the shop and they had to do some re-sets with STAR.

Found this thread here. Any thoughts on fixes that don't cost a grand just for the part?
https://mbworld.org/forums/sl-class-...trol-unit.html
Last edited by White Spyder; 02-24-2019 at 07:13 AM.
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Old 02-24-2019, 01:17 PM
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What are your symptoms? And do you have the "highline" TPMS where it give you individual pressures, or just the simple one that only tells you when "some" tire is low?
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Old 02-24-2019, 04:48 PM
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Originally Posted by Rudeney
What are your symptoms? And do you have the "highline" TPMS where it give you individual pressures, or just the simple one that only tells you when "some" tire is low?
Along with the DTC above, the info center in the dash shows the car but no tire pressure at any of the 4 locations (Highline). I also get a dash malfunction message. I am on the road for work and can not recall the exact wording.

Thanks for any assistance.
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Old 02-24-2019, 08:56 PM
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Check fuse 70 (rear panel) it control the TPMS module. i doubt that's it, but it's worth a try.
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Old 02-25-2019, 02:22 PM
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Originally Posted by Rudeney
Check fuse 70 (rear panel) it control the TPMS module. i doubt that's it, but it's worth a try.

the one one behind the passenger seat?
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Old 02-26-2019, 05:32 PM
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Correct. Here's a set of fuse charts I compiles from WIS. It's "mostly" correct I think:

http://benzbits.com/r230/fuses/
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Old 05-19-2019, 04:09 PM
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I just pulled fuse 70 5 amp from behind the passenger seat. It was good so I put it back and now the problem is solved. Not sure if it reset the module or what but it sure was a quick pleasant fix. 2005 SL65. Just an FYI.

Tom
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Old 03-14-2023, 09:28 AM
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Originally Posted by compunow
I just pulled fuse 70 5 amp from behind the passenger seat. It was good so I put it back and now the problem is solved. Not sure if it reset the module or what but it sure was a quick pleasant fix. 2005 SL65. Just an FYI.

Tom
Worked for me too!!!!!!!!!
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