Quote:
Now how it is done using a CAN data bus;
if you can imagine all the control units are interlinked via two data transmitting wires (CAN data bus) all that has to be done now is the crank angle signal is put onto the CAN data bus via the HFM which continues on through all the modules and then any module that requires an engine RPM signal is programmed to accept that signal if the control unit doesn't need that signal say, like seat adjustment module then that CAN signal will pass straight thru. so its a little bit like sending a letter, you address the letter (crank angle signal) you put the letter in the mail box and it gets sorted (HFM) it then gets delivered (CAN data bus) and goes to the address on the letter (control units programmed to accept that signal) if you receive a letter thats not addressed to you, you put it back into the postal system (control units not requiring this signal)
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Thank you very much for the very detailed elaboration Ozzy, I have fully
understand your explanation but I have one last (annoying and apology) query for you
1. Referring to the bolded sentence, may I ask : since it will be put back into the postal system (
control units not requiring this signal), I understand that the proposed letter (
control units programmed to accept that signal) will not function but how come the right signal will come back again 5-10mins after several attempts? Does it mean that the mail box and sorter (HFM) has reset itself (
and the fault is stored)?
2. Where are you from anyway Ozz? I am from Brunei Darussalam, located in the island of Borneo.
Many advance apologies and and thank yous again for your patient comments.