Παράθεση:
Αρχικό μήνυμα απο
Teoz3
Μάλλον κάπου σε μπερδεψα τα έχω μπερδέψει εγώ.
Το Z3 Facelift είναι του 2001 και μου είπαν ότι το Facelift έχει can-bus το οποίο τους δημιουργούσε πρόβλημα στον κινητήρα s50 και στα όργανα (όργανα e36m3).
Ερώτηση :
1. Το Z3 face-lift όντως έχει can-bus τελικά ;;
2. Αν όντως έχει έπρεπε να παρσμετροποιηθει - αφαιρέσουν για να λειτουργήσει το κοντέρ e36m3 και ο κινητήρας s50;;
To θέμα είναι αρκετά ενδιαφέρον και διαβάζοντας κάποια threads σε άλλα φόρουμ ξεχώρισα αυτό:
https://www.bimmerforums.com/forum/s...2000-Z3-CANbus
Και πιο συγκεκριμένα τα παρακάτω στοιχεία του (αν και αξίζει να το διαβάσεις όλο):
https://www.bmwfans.gr/4images/data/...10/testcan.png
Παράθεση:
Again, CANbus is not an all or nothing thing. Yes, all Z3s have a CANbus. That does not mean all modules are on that bus. The DME, ABS, and EGS are always on the CANbus, all years. For your '00, the cluster is also on the bus. However, previous years and all M's are individual signals to the cluster.
Παράθεση:
My S52 Coupe uses the .C27 daten version instruments, which is very much E36 based, and not nearly as many functions.
My m52tu roadster uses .C02 daten cluster, which is nearly identical to E46 .C02 version.
The M52tu/M54 Z3 clusters diagnose fine via K line and USB KKL if you want to play.
Παράθεση:
I'll restate the info so that it is hopefully easier to understand.
BMW instrument clusters of that era were designed to bridge the transition from displaying the analog values directly from the sensors to displaying values reported over the digital communication links i.e. CAN bus and K-line.
To do that all of the gauges and lights are software driven. The instrument cluster is built with all of the analog input circuitry needed for traditional inputs, plus CAN bus and K-line communication. The microcontroller uses a software setting to decide if it should display the value it reads from a direct input wire, or wait for a CAN bus message with the information.
That way the same instrument cluster can be used with an older engine that had a directly wired temperature sensor and tach output, or an updated engine where that same information is reported using CAN messages. It can be used with a chassis that only has a reed switch on the differential, or one that reports the speed using the ABS controller.
This works-with-everything features was designed for the benefit of the factory, not for you. BMW doesn't document it. People have mostly reversed engineered the software EEPROM settings and the CAN bus messages, but not every detail. The chassis wiring harness is typically optimized for the few engines that the car might be built with, so a MY2000 harness is likely missing some wires that older chassis had e.g. to support the M52 and M52tu engines, just like the MY1999 chassis is missing the wires to support the throttle-by-wire needed with the M54.
