3 unrelated questions on the 360 & CS

I'll answer question no 1. first...

See diagram, since the engine oil flow goes through the engine and gearbox on the 360 its actually used as the combined engine/gearbox oil temperature sensor. (see item 2 on diagram 2, or item 25T on first diagram)

You can see from the pictures, its directly wired to the Ignition Computers so it can determine if the oil is warm so it can adjust its air/fuel compensation maps accordingly. The Dashboard clocks show Oil Pressure (a different VDO sensor located at the base of the oil filter).

Ferrari Part no. is 104628, however there are many manufacturers that make this part at a fraction of the price. Its been used for decades on other hundreds of car models across multiple manufacturers so many substitution Part no. exist from many manufacturers.

Here's the main substitute part numbers (there may be more, these are a fraction of the price of the Ferrari part number so useful if you ever wanted to swap it).
FIAT 7 542 186
FIAT 7 548 005
FIAT 7 588 803
FIAT 7 588 883
INTER MOTOR 52402
FACET 7.3084 (73084)
BERU 0824121154
BERU ST097
CALORSTAT WS2511
EBERSPACHER 90.094.03
ERA 330102
FAE 31590
HAVAM 1.830.084
HELLA 6PT 009 107-621
LUCAS SNB177
MARELLI 116596489902
OE EPS1830084
PEX 3.40.080
VALEO 700041
VEMO V24-72-0027
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I'll take the 4th Question next...

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4th, see picture, I noticed there's a connector hanging around the OBD2 port ( picture shows OBD2 port plugged with scantool). What is this thing for? Did it come from the factory like that(modena leftover) or pervious owner did some mod?
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Its not a modification, it is a diagnostics port that's standard on the factory wiring loom, its used to test port for the Digitek Dashboard Clocks.

 

The gearbox oil is warmed up and cooled down by the coolant in the heat exchanger located in the middle of the 2 banks. So, I though that the TCU was doing an assessment of the oil temperature based on the coolant temperature. May be it uses also the engine oil temp. I never checked with the Texa to which of those temperatures the gearbox oil was the closest.

The oil temperature sensor is directly linked to the dash, not the engine ECUs. The oil temp is then broadcasted on the CAN bus which makes it available for the ECU/TCU which have to use it.

 

Thanks Eric,
I did originally think the Oil Temp worked the way you described (I haven't actually snooped/sniffed the Dash CAN bus to determine precise messages sent yet) but I then recall that once I took out completely my Dashboard clocks out when I was trying to diagnose a fault (I actually physically disconnected the entire set of looms) and the car still started up and ran just fine without them! And thus without Oil Temperature readings it seems!

...This made me think that it would have been more logical for the Bosch Ignition computers to read them but obviously that is not the case. It makes me think that maybe they just ran out of spare GPIO pins on the Ignition ECU's so felt it was easier to read the temp's in with the Dashboard clocks ecu then relay the readings from there over CAN to both the TCU and Ignition ECU's. Or perhaps they wanted both Ignition computers to get the message at the precise same time so they where synchronized? I'm just guessing..

The fact the engine ran just fine without the oil temp reading must means that the Bosch ignition computers must do something else to determine or try to estimated engine operating temps (i.e. estimate them based on other outputs like o2 sensors)? Do you have any more details?

-T