Mercedes SLK World banner
Status
Not open for further replies.

Bugs that Bugged me while in Debug mode :)

2.9K views 13 replies 3 participants last post by  BaD_81  
#1 · (Edited)
OWN RISK!

Key words here.

So, I am novice in MB Diagnostic tool for multiple reasons.

I have plugged the C3 about 5 times in total. The long lasting BUG no AC module connection!
Initially the A/C was working with close to null effect - A/C compressor starts, hissing sound very audible on top of the driver's vent (above the light module) but no matter outdoor temp the "cold air" was not felt. So yes, there is a r134 agent in the system just insufficient. And knowing that I wasn't really bugged it can't connect. Last autumn I charged the A/C - I extracted 530gr out of 850 on label (surprised NOT) vacuumed until the TORR gauge showed good level (really don't remember, but under 2 is OK in most cases) and charged total of 920g (virgin-means fresh, not reclaimed) - that includes the quantity in 3 hoses lengths - blue hose -low P-cold, red hose -high P-hot and yellow hose refrigerant cylinder - manifold body. Manifold gauges were left under pressure as there is no way, they can be sucked into the system (regular A/C and fridge - different story). NOW knowing the A/C works as blowing 4C out of the driver's vent finally got the time to hook-up the diagnostic tool!
Quick check showed, not so much of surprises, but too many surprises!

Did i mentioned it will be long?
What I saw into saved:

Lost connection - well I had the central console out and probably the key was rotated too much to unlock the steering wheel or whatever happened (the VIN was entered as details priod the screens, but as obvious only one of them has it - own risk right). That b1000 was checked and before and the specific module was not part of the data-card/options/hardware of the vehicle (why is enabled I can't say). Don't mind the dates it works*

Some clarity on the sticking indicator, hazard clickers! What wire, fuse, relay is playing up is being discussed and before (haven't open the ccm module to see the relay contacts- yet) waiting for better days as DaDude is outside. Not new, the access to the AC module kicks in again! But the stored errors are visible (QUESTION TO SELF where are they stored if the TAC module is not accessible?) and kinda make sense if block unplugged and key was turned...
Oh and don't worry about the battery - first few check were without the engine running, just moving the acid inside the battery :)
Picture limitation - last one for the moment:
obviously the Engine ECU has feedback the A/C is working! But the diagnostic can not see it! I have not forgotten the Question to Self :)!

I will continue with another entry as the Q to S are multiplying with the diagnostic.

Another "gremlin" is low level of shakes in the rpms - can not say in warm engine only, but honestly can't say it is with coolant reaching 40C let's say.
 
#2 ·
Another "gremlin" is low level of shakes in the rpms - can not say in warm engine only, but honestly can't say it is with coolant reaching 40C let's say.
Some details:

The very first time I see fault written there! I've checked and before, but this is the first time I see the fault over 0!
Q to S is it only the coil (wasted spark feeds 2 cylinders) of the ECU is going the wrong direction? I have another set of coils - used almost for free, but never swapped or...might be a good time/idea!
When the Super Charger (air compressor) kicks-in? 1200rpm with no gear selected and 950rpm when on D is my usual answer until today:

As it looks it is 2000rpms - small clarification it was in P, need to dig the old screens if on P or N, just to clarify is the connected diagnostic "changes" settings/behavior! Pics limitation...
 
#3 ·
Another small detail that is "waiting":

And some "actual values"

I know what the F stands for, I know what the check stands for, but I really have no idea what the not selected F or check means. Not installed module - OK, but some of them should be there! Like 0605 engine control module, like 0500 front left vehicle speed...Q to S find how to confirm missing vs faulty? And how much of an issue is that?
 
#4 ·
There is another bug:
A/C compressor is reported working or not on previous screen but missing as input on this one !?!
Keep going:

I know the brakes are working (have not ran anyone over) and I know the ABS is working (not needed to test it but...M1 drivers), however the module isn't happy to "connect"
Well the details are correct:

Now this one is a bugger:
As it was visible on the other pics the passenger window is lowered, the cable of the diagnostic goes out and in the engine bay. Q to S was it operated after the diagnostic started or the end switches - do not know? If there are end switches!
And another bugger:

DAS2 doesn't answer, or it was not fitted and the error B1000 FFZ N54/3 is a ghost (screen says IFZ)!
Haven't calculated the time and quantity of pics, will have to finish tomorrow!

Anyways if anyone has answered any of the Questions to Self, I will be happy to hear!
Shower and bed time now!
 
#6 ·
Few more Q to S on DAS:

Diagnosis cable - they are wire to ...let's say PCB and continuity check with multi-meter could answer that!
Control module - not reporting error, starting the car...not impossible - let's say less likely!
Voltage supply - engine was running the battery is not flat...
Can link - between what? And was it not going to show on the "quick diagnostic"?
I think I've seen them all!
Some control measurements:
Maximum Speed Limit - I would say it is about the speed limit option I have not in my vehicle, not General limitation of the top speed!l Could be wrong of course! To clarify, speed maintainer works - outstanding! If not wrong every 1 "click" up or down changes the "target speed: with 1 kmph!
I am skipping screens as not important or not out of acceptable/ordinary/etc.
Have you asked yourself how much the A/C costs you? I haven't measured while moving, but on a spot (20-30)% probably that is why the German Engineers used ECO button VS A/C button! The picture is 1.30, but it was jumping 1.20-1.30 l/h

And as Germany - Europe - SI the consumption is l/100 km.
OIL change records next!
 
#7 ·
Oil change figures and ASSYST math :) I am just surprised how these numbers are explained:

My own records are like that:
26 Apr 2020 Oil+Filter 58758 miles (94561 km) next - 65800
4 Sep 2021 Oil+Filter 60225 miles (96922 km) next - 67000
Current mileage visible 64341 miles (103546 km) since last change 6624 km but I am using 1 mile = 1.60934 km for calculation and it looks OFF when it comes to the diagnostic! Even using 1.61 km for a mile it is still off. So I will ignore that. However 4888.6 km do not match the driven numbers (nor even miles if we assume it is error) - the idles ... I can't say, traffic, battery maintainer in the previous winter...I just can't say!
108 days left 15.5 weeks about 25 Sep 2023 or about 2 years as explained before.
Next screens/pics are a bit scary! Just a bit. I know why I changed the oil - the screen was showing due dates - etc. and the car says 1 day later at 97 200km (almost as my calculations) with plenty of mileage left!

Before that: 94 600km with plenty of mileage left and overdue about 4 years! @M4rCu5 you remember sharing an observation about "diesel" like sound coming from the 2.3 liters petrol engine...not surprised!

Previous one 84 900 just a year later, compared to the schedule!

Previous one 79 800 about 2.5 years overdue!

Previous 67 500 let's say on time:

I doubt it is the first oil change at 42 000 miles but can't be sure where the service book is at this moment to check!
Anyway if someone tells you (during sale negotiation) that the car has Full Service History, do your best to scan it with Independent garage (factory level equipment) for those service intervals!

Now the scanning screen are done - saved. Back to reading, checking, sweating, swearing.....and whatever's next, not needed to be in this order!

Again if anyone has been asking these Questions and has the answers (or findings), will be happy to read about their experience!
 
#8 · (Edited)
Wasted sparks are not 1st and 3rd on 1 coil and 2nd plus 4th on the other coils (as I wished to be) but the 4th and 1st on coil over cylinder 4 and 2nd + 3rd on the coil over cylinder 2.
Well I can't say I am surprised as when I got the used set (I know used means as good as the one I have) for £5.59-5.99 whatever it was 2 years ago, I checked and matched the leads and the spark plugs to have as close to each one resistance as possible. And ended up with 2 leads from the other set (1st and 3rd cylinder) and originals (mine) on 4th and 2nd cylinder.
So today the job was to swap not coils but leads. In other words now DaDude has all 4 leads being from the set that I got on the price of next day delivery - tracked and signed letter!
The not so pleasant part was:
Gas Auto part Circle Metal Composite material
Fixture Gas Auto part Machine Metal

I can only guess it is not unusual! For 25 YO!
Happily nothing inside:
Eye Automotive tire Motor vehicle Tree Rim
Rim Motor vehicle Bicycle part Gas Automotive tire
Fluid Gas Auto part Circle Machine
Automotive tire Rim Gas Automotive wheel system Bicycle part

And the leads are almost as clean as you would imagined:
Automotive tire Motor vehicle Rim Bumper Gas
Automotive tire Bumper Gas Motor vehicle Rim
Automotive tire Motor vehicle Bumper Gas Automotive exterior
Automotive tire Hood Automotive lighting Automotive exterior Asphalt

Not saying they were not dipped in the oil while trying to remove the cables from the Module to the Coil, just saying I wasn't careful enough to make sure I didn't do it.
Man Vs Machine +1 for the machine! Regrettably I still see the engine shaking while idling.

Haven't been checking if untrained eye can get the difference between good looking (still doing the job) engine mount(support) and a goner. I will prepare my inspection mirrors just in case.
And to be sure I will not miss a thing will charge a set of battery for the endoscope, if it still works, as lidl products tend to go bad in their "shelving" life. Corded and battery operated.
 
#9 ·
So reading this and that, having time for that and this, I drove to @M4rCu5 and tried (again) the new unit of his. As before it didn't connect for whatever reason.
And...own risk right?...What do You Know?!?!?
C4 - diagnostics, not bombsquad - saw different number of modules, and my A/C module too!
C4 - accessed, interrogated, communicated, whatever you wanna say that A/C module. Showed the values, the sub-menus...obviously newer machine, worked in that specific module.
The modules recognised (seen) by both multiplexers were different numbers. And differently arranged.
Attaching the C3, after the C4 changed nothing, that A/C module is not accessible, end of story!
So if anyone has been bumping his head against the wall ...if I can't access the module, it must be the problem...you might be wrong! If you know the module works (like my A/C) but the diagnostic unit can't access it, don't be in a hurry to replace.
And as usual, if it works - don't repair it!
 
#14 · (Edited)
Hey @borris1954
I ran into the answer of yours here:
Can you advise if the scan was done on C3 or C4? I read you were thinking to upgrade. The screen is from the pdf you shared and it looks like the modules C3 sees on Mark’s vehicle above(FL), but mine 1998 doesn't have separate entry for ETC:
Font Number Parallel Document

Unfortunately, I haven’t got a screen from C3 and quick scan result for DaDude available at this time to share. Will check the PC tomorrow.
edit
I found one the very first I think I had done with the help of Mark:
Rectangle Font Parallel Screenshot Number

One is the report the other is the screen from the quick scan screen.
 
Status
Not open for further replies.
You have insufficient privileges to reply here.