360 - Right Bank Motronic Bosch Engine Management System absent? | FerrariChat
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360 Right Bank Motronic Bosch Engine Management System absent?

Discussion in '360/430' started by DanNE, Jul 13, 2023.

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  1. DanNE

    DanNE Formula Junior

    Jun 7, 2013
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    #1 DanNE, Jul 13, 2023
    I've had a Launch OBD2 scanner and recently just got a ThinkDiag2 which I tried today. The Launch OBD2 scanner last had Ferrari database 10.95 (but I had used it with previous versions since 2018 I recall) and the ThinkDiag2 has Ferrari database 11.10.

    For the life of me I can't get the Right bank motronic bosch to show up, it appears as 'absent'. The 'Recovery' is showing active/enabled.

    I've included an old scan from Launch showing 'Abnormal' on the Right bank. Also a screenshot from the ThinkDiag2 to illustrate what I mean. Note that in the system scan the Right bank is missing.

    Has anybody else had this issue and what could be the cause? I haven't done any ECU work/swap/etc. on the car ever, and car runs great (other than a P0152 O2 sensor issue that appeared a few weeks ago).

    Thanks for all your help!


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  2. flash32

    flash32 F1 Veteran

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    #2 flash32, Jul 13, 2023
    Make sure immobilizer is off .. also try with engine running
     
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  3. DanNE

    DanNE Formula Junior

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    #3 DanNE, Jul 14, 2023
    Tried both ways you suggested and there's still no Right side ECU? Car runs fine (great actually)....the "Recovery" Right side ECU is present.

    Any thoughts? Wiring maybe?
     
  4. Qavion

    Qavion F1 World Champ
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    #4 Qavion, Jul 14, 2023
    Possibly. Can you do a continuity check between the OBD2 port and the RH ECU?

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    If that is open circuit, there are a few inline connectors between the OBD2 port and the ECU you can reset or clean the pins on.

    Do you have a Modena or Spider?
     
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  5. flash32

    flash32 F1 Veteran

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    #5 flash32, Jul 14, 2023
    I am going to say it is the launch software ..nothing to do with your car ...it is a guess ..but I have seen this before and when I restart the dongle or go thru system selection it works ..not every time ..so that is why I don't believe it is your car

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  6. DanNE

    DanNE Formula Junior

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    #6 DanNE, Jul 14, 2023
    This car is a spider. Thanks for the advice I will check tomorrow.
     
  7. Qavion

    Qavion F1 World Champ
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    #7 Qavion, Jul 14, 2023
  8. DanNE

    DanNE Formula Junior

    Jun 7, 2013
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    #8 DanNE, Oct 18, 2023
    Hi guys a quick follow-up on this issue - I do not have continuity between the two pins so I need to re-seat the connectors in between? Or could it be a disconnected/loose/broken wire somewhere?

    On top of this my current Launch software does not communicate with the TCU anymore...I even got another OBD2 scanner that is supposed to work very well with the 360s and both the Right Side ECU (as above) and now the TCU cannot connect properly.

    Is there a systematic way to debug wiring issues? Is the OBD2 mapping to various harness points available from the electrical diagram or documented anywhere else?

    I would assume that for both the right side ECU *and* now the TCU I'd have to disconnect the harnesses at various points starting from the longest connection and ohm out the various pins?

    Thank you!
     
  9. Qavion

    Qavion F1 World Champ
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    #9 Qavion, Oct 18, 2023
    Standby... I'll recheck my diagrams. The wire goes through several connectors.
     
  10. Qavion

    Qavion F1 World Champ
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    #10 Qavion, Oct 18, 2023
    The signal path:

    OBD port pin 7 >>> splice "S170C" >>> connector 2E/3E >>> connector 7D/20D pin 5 >>>> connector 6G/11G pin 1 >>> ECU.

    The connectors have different labels depending on the side of the connector you are looking at.

    2E/3E

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    7D/20D

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    7D/20D has caused issues before (reconnecting fixed the problem). I think it's forward of the centre console, under the dash.

    6G/11G (behind the right hand seat, above the relays)

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    You could progressively do wiring checks between the RH ECU, OBD port and each plug.

    Good luck!
     
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  11. Qavion

    Qavion F1 World Champ
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    #11 Qavion, Oct 18, 2023
  12. DanNE

    DanNE Formula Junior

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    #12 DanNE, Oct 18, 2023
    This looks like a pain...but it'll have to be tackled as I have a check engine light and it does not pop up in any diagnostic system.

    @Qavion is there a mapping of all the OBD2 pins? I am also having an issue with getting the TCU recognized...
     
  13. Qavion

    Qavion F1 World Champ
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    #13 Qavion, Oct 18, 2023
    I don't actually have a map. However, the TCU seems to use the same splice S170C for at least one of the OBD2 wires. Hope you don't have a splice issue as Ferrari doesn't tell us where they are.

    Anyway, check the wiring between OBD pin 7 and pin 49 of the TCU's larger plug. Also check OBD2 pin 15 to TCU pin 37 (grey/red wire)


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  14. Qavion

    Qavion F1 World Champ
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    #14 Qavion, Oct 18, 2023
    There is only one plug between the OBD2 port and the F1 TCU. That is in the same area as in the photograph (forward of the console). i.e. a 14 pin plug labelled 6D/1P in the wiring diagrams.

    Pins 2 & 3 (so next to each other). Grey/yellow and grey/red. I don't know if the plugs have different colours, but it would be handy to know them for future reference.

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    TCU side shown, looking at the face of the plug.
     
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  15. DanNE

    DanNE Formula Junior

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    #15 DanNE, Oct 19, 2023
    Thank you, I will work on building some thin jumper wires to reach around all these locations and will start looking into probing this. I assume you just use the ohmmeter and have a thin lead wire that can reach each of the pins and make good contact...there's no need to check for signal integrity with a scope or otherwise?
     
  16. Qavion

    Qavion F1 World Champ
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    #16 Qavion, Oct 19, 2023
    Correct. Simple ohm checks. All the resistances should be a few milliohms.

    Some of the sockets can be small. I sometimes use old fashioned household fuse wire to probe the smaller sockets. Maybe also invest in some small insulated crocodile clips. Note that the quality of crocodile clips can vary. Sometimes the open circuit can be due to a faulty clip.

    Body earths can be unreliable, so I do like to use a long piece of wire instead of using the car chassis as the wire (if you know what I mean).

    It may be best to turn off the battery when doing these checks as there may be live power running through some of these plugs.
     

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