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Ferrari California gearbox problem

Discussion in 'Technical Q&A' started by ilDandi, Nov 24, 2019.

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  1. ilDandi

    ilDandi Rookie

    Nov 18, 2019
    4
    Rome
    #1 ilDandi, Nov 24, 2019
    Well, I took a gamble, I bought a 2010 Ferrari California with a new gearbox fitted but still not working. The car is stuck in N no other gear is selectable. The diag shows P1920 and P196C dtcs.

    P1920 Supply voltage 3 (Sensors: Odd Clutch - Shift - Act. 1/2 - Parklock) Too Low
    P196C App Parklock Invalid Signal (High Level Parklock Fault)


    I followed the SD3 instructions for this fault. It says :

    -Check fuse F63 in the fusebox between rear seats
    Fuse's ok

    -Check relay T25 in the same location
    Relay's ok shows a healty 82 ohms on the coil

    -Visually check pins 54-67-50 113-116-117-119 41-42-21-39 on B connector of gearbox ecu
    Apart from the fact that the pins mentioned are in two different connectors, there's nothing wrong with them

    -Check continuity between:
    Pin 42B - Pin 16 Gearset
    Pin 41B - Pin 10 Gearset
    Pin 21B - Pin 12 Gearset
    Pin 39B - Pin 14 CCP
    Pin 54B - Pin 10 CCP
    Pin 67B - Pin 9 CCP
    Pin 50B - Pin 11 SAP

    If they are all ok they suggest to replace the gearbox ecu (NCR)


    The problem is that I don't know what Gearset, CCP and SAP are.

    I removed the two round connectors on the gearbox and I checked continuity between the bigger gearbox connector and I found that pins 5 and 80 are missing.

    Does anybody have the wiring diagram for this car as I can verify if there's something wrong with my car?
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  2. mikeprice

    mikeprice Rookie

    Jun 19, 2010
    24
    #2 mikeprice, Dec 17, 2019
    sounds like a pain, how have you got on?
    I only have the workshop manual and the wiring diagrams are a separate manual, I was thinking of getting when and if I need it.
     
  3. ilDandi

    ilDandi Rookie

    Nov 18, 2019
    4
    Rome
    #3 ilDandi, Dec 23, 2019
    I fixed it, the problem was in the gearbox harness, probably in the past the car has been rear ended and there were bad connection on 3 pins.
     
    Qavion likes this.
  4. Motob

    Motob Formula 3
    Professional Ferrari Technician

    Nov 11, 2003
    2,343
    Frederick, Maryland
    Full Name:
    Brian Brown
    #4 Motob, Dec 23, 2019
    I am glad that it was a inexpensive repair. How long did it take to find it? The connectors on the gearbox are are very difficult to access, did you drop down the rear-subframe/gearbox in order to get to them? Were the bad pins on one of the three gearbox connectors, or on the ECU connector?

    Many of the DCT problems are internal to the gearbox and require removal and disassembly of the gearbox, so you got lucky.
    Did my wiring diagrams help?

    Brian Brown
    San Francisco Motorsports
     

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