Hi all! I would like to flash some codes in on the dashboard, but my 1995 456 GT does not have the diagnostic push button on the ECU. There are 3 plugs coming out from the main loom, a 3-connector which I presume is for the SD-1 and two single connectors with a blue and black wire. Any knowledge on which wire I should short to ground - preferably without frying the ecu? Image Unavailable, Please Login
I only have one wiring diagram for the 456GT (2.7), and that is the Left Bank Engine diagram. It shows the following: Image Unavailable, Please Login HN = grey with black stripe N = Black HR = Grey with red stripe Your colours look different. On the Ferrari 348, I have these colours: Image Unavailable, Please Login HR = Grey with red stripe N = Black HM = Grey with brown stripe. That seems to be a better match. Anyway, in either case, just short out the black and grey/red as per the test procedure. In the diagram, the 456GT blue and black wires are labelled "For excluding idle speed control", whatever that means. They are joined together to produce that effect, but I guess they are not normally joined.
Assuming that wire on the right is grey/red... Image Unavailable, Please Login Make sure that you have bulbs in the Check Engine lights. I heard that some Euro cars don't have bulbs.
Here's the test procedure for the Ferrari 348. I don't have any codes for the 456GT Image Unavailable, Please Login
Thanks! The 3-pin connector has the correct wires - grey/red and black. I got the correct bulbs fitted in the binnacle. I'll have a go flashing codes later today!
It worked perfectly, just had to hold the switch longer than I thought to make it work (approx 4 sec.) I made a plug and play switch to make things a bit easier. Image Unavailable, Please Login
Got 1121 with the engine not running, I'm guessing it's the rpm pickup not detecting the engine rotating. Other than that it was clean.
That is actually quite useful to know. They should be connected when adjusting the throttle and balancing the engine!
So my wires are brown/black, solid grey and brown/green! 1995 456 GT euro car. Image Unavailable, Please Login Image Unavailable, Please Login Image Unavailable, Please Login Image Unavailable, Please Login
Codes can be very different between V8's and V12's, not just cylinder numbering. The P0xxx numbers are usually standard. Weird. If I had to guess which wires to short.... Image Unavailable, Please Login I would confirm by checking to see if the middle wire goes to ground (and ECU pin 19). The other wire (to be shorted) should go to pin 13.
My mistake. I found another similar plug (with the correct coloured wires) on the drivers side of my LHD car, nearest to the clutch pedal. I shorted the wires and got a code 2411. Anyone know what this indicates please? Image Unavailable, Please Login
No idea. In the link provided earlier, someone speculated that "2" indicated the left bank, but Ferrari codes don't usually work like that. If it were true, it might point to injector #7. Is there anything currently wrong with the car? Google says a faulty throttle pedal position sensor... definitely N/A.
I thought you could connect a Fiat/Alfa cable to the 3 pin connector and then use an OBDII reader on a 1995 car with OBDI ? I tried mine a while ago, and it seemed to connect, but I got no codes from it - so I guess that says no. or is the flashing lights only for US cars ?
The 3 pin/OBD2 adaptor is only for 5.2 cars without an OBD2 port. My Australian F355 5.2 doesn't have an OBD2 port, just a 3 pin plug.
Left side ECU - Ignition on, engine not running, AC off 1113 throttle potentiometer Right side ECU 0 ignition on, engine not running, AC off 1121 RPM sensor 1121 (this code will be shown if checked when your engine is off) So given that the left side light occasionally flashes on steady rpm (2k), I guess the throttle potentiometer is maybe a bit dirty - I will look to clean and/or replace. Thanks @Qavion and @Aerosurfer for your help above in getting me to this point, you are a credit to this community
