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Author Topic: 018CH -> 018CA crossflash -> CEL Nonfunctional  (Read 1928 times)
RENOxDECEPTION
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« on: March 25, 2022, 03:35:44 AM »

I have performed a 5120 on 018CA, unfortunately, I didn't realize that the CEL is not functioning even on a stock 018CA file.

I realize 018CA is a Euro file.

Is there anything I can do to get the CEL to function?

Boost control works beautifully, but I'd like to be alerted if for example my o2 sensor dies.

Thanks.


Link to bin: http://nefariousmotorsports.com/forum/index.php?topic=3027.msg97858#msg97858
« Last Edit: March 25, 2022, 03:47:13 AM by RENOxDECEPTION » Logged
Sandstorm3k
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« Reply #1 on: March 25, 2022, 04:04:26 AM »

This also seems to happen with immo 3 clusters paired with immo 2 software on the ECU. Not sure what version your files are.

Seen this problem on Leon, Passat, Ibiza.
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fknbrkn
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mk4 1.8T AUM


« Reply #2 on: March 25, 2022, 04:57:32 AM »

CDMIL or something like that (cant remember correctly)
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RENOxDECEPTION
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« Reply #3 on: March 25, 2022, 09:39:49 AM »

Thanks for that push in the right direction, CWNOMIL 1 -> 0 and my CEL self-test works now, but when unplugging things that should throw a CEL, nothing.


Engine was restarted a few times with things like maf, map, intake temp, fuel injector, etc. disconnected.

Code:
Friday, 25 March 2022, 09:34:48:0
Control Module Part Number: 4B0 906 018 CA
  Component and/or Version: 1.8L R4/5VT     G   0003
           Software Coding: 16201
            Work Shop Code: WSC 87119
                      VCID: 62B7298BFD57
           Additional Info: XXXXXXXXXXXXXXXXX     XXXXXXXXXXXXXX
7 Faults Found:
18010 -  Power Supply Terminal 30: Voltage too Low
        P1602 - 35-10 -   - - Intermittent
17834 -  EVAP Purge Valve (N80): Open Circuit
        P1426 - 35-00 -   -
16622 -  Manifold Pressure / Boost Sensor (G31): Signal too High
        P0238 - 35-10 -   - - Intermittent
16497 -  Intake Air Temp. Sensor (G42): Signal too High
        P0113 - 35-10 -   - - Intermittent
16490 -  Manifold / Barometric Pressure Sensor (G71) / (F96): Implausible Signal
        P0106 - 35-10 -   - - Intermittent
17645 -  Fuel Injector for Cylinder 1 (N30): Open Circuit
        P1237 - 35-10 -   - - Intermittent
16486 -  Mass Air Flow Sensor (G70): Signal too Low
        P0102 - 35-00 -   -

ecm is immo 3, cluster is coded to immo 3, tried immo 2 for the hell of it, and the normal dtc's for that came up, no CEL either way.
« Last Edit: March 25, 2022, 12:54:10 PM by RENOxDECEPTION » Logged
RENOxDECEPTION
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« Reply #4 on: March 25, 2022, 01:17:34 PM »

b_mil with engine off is 1

b_mil with engine on is 0

The ecm is definitely not requesting a CEL with codes active.
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RENOxDECEPTION
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« Reply #5 on: March 25, 2022, 07:11:46 PM »

Apologies if I'm doing this wrong but this is difficult to wrap my head around.


I assume the S/R blocks are set and reset?

Green pathways appear happy, red unhappy.

And made assumptions of AND for "&" and OR for "v"




What I can gather from this image in the english FR is that when CWNOMIL is 0 that pathway is low, and is then inverted at the end to high.
b.kl15 is Terminal 15 power and is switched 12v, so always high.

that group is AND gated with the output of an OR gate, b.milst which is "MIL turn-on, test function during start", which is SET during ecm initialization, and RESET when n_mot is active + TLAED which is "Waiting time until error lamp off after start".

Since the above OR pathway is high, that appears to by my only happy pathway to b.mil=1


As for the getDfpmMIL() pathway, since misfires don't cause blinking, confirmed. And P-codes don't cause MIL on, confirmed, those pathways are red. Albeit, off is a pathway that appears to be constant and idk if I can test that.

C.NACHL is the "ECU condition for ECU switch off delay" so if OFF and C.NACHL are both constant high, then perhaps a constant reset is being issued?



I guess this leads me to asking, wtf is "getDfpmMIL()", it's a function, but is there something that disables its output somewhere?

Also, why tf is MIL disabled on a stock file, it doesn't make sense.





So here is the example of the MIL shutting off when n_mot detected.


what a load of shit for turning on a damn LED.


ps, there are other pathways but I removed them as they didn't seem relevant.

full image here



« Last Edit: March 25, 2022, 07:26:10 PM by RENOxDECEPTION » Logged
RENOxDECEPTION
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« Reply #6 on: March 26, 2022, 03:08:33 AM »

screw it, did 5120 to 018CH 360854. I'll post how in 5120 thread soon.
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fknbrkn
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« Reply #7 on: March 26, 2022, 04:36:36 AM »

Did you checked CLAsses? MIL event encoded in every class
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