When it comes to Mode $01, there are up to 254 values that can be extracted from an ECU, but J1979 only describes the first 30. $06 Test results, non-continuously monitored J1979 describes the first 9 'Modes' for retrieving information from an ECU, and the 'PIDS' used for Mode 01 access to Data. J1979 was created by the EPA for accessing certain parameters from the onboard ECU.
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The next stop in our description of how to access data on a BA Falcon network is this standard - J1979. Last edited by Lukeyson on Fri 11:50 pm, edited 6 times in total.
The BA/BF Falcon and SX/SY Territory has a 500kbps 11-bit CAN Bus, which connects the ABS/Traction Control Module, Audio Control Module (ACM - in the ICC), HVAC INtegrated Module (HIM), Instrument Cluster (IC), Body Electronics Module (BEM) and Powertrain Control Module (PCM).
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* ISO 15756 CAN - 250kbps or 500kbps - By 2008, all vehicles sold in the US will be required to implement CAN. * ISO9141 - 10.4kbps, used by Chrysler, European and Asian Cars - and by the BA/BF Falcon and SX/SY Territory for ABS/Traction Control Module (for Diagnostics Only - (ABS/TCS)), ABS/EVAC FILL Module, Parking Aid Module (PAM) and Restraints Control Module (RCM) * SAEJ1850 PWM - 41.6kbps, used a lot by Ford The 'Networks', the standards that describe them, and some basic usage information for each type of 'Network' are as follows The 'Networks' are described by even more standards themselves, and describe speeds and messaging protocols so that you can read - or write - data to or from devices - or 'ECU's' - on each Network. The J1962 standard describes which particular 'Networks' are accessible and on which particular pins you'll find them. Any scantool that is OBDII compliant must have a connector that can insert into a port of this nature. sell lots of different types of cable for this port. But essentially it's the port in the Fuse Box on every BA Falcon (or above). This standard defines the size, shape, pins, voltages - all sorts of stuff. The 'Port' used to access the 'Networks' on any OBDII Compliant Vehicle, including the BA Falcon, is described by Standard SAE J1962. The Commodore V6 was not compliant until the Australian built HFV6 was introduced in the VZ (None of the Buick V6 Commodores supported OBDII in Australia, even though they had OBDII support in the US from 1995), although the LS1 V8 Commodores have been OBDII compliant for quite some time (I don't have a year yet). the BA Falcon, however, was compliant when it was first introduced back in 2002 - which I think is neat.
In Australia, it was mandatory that all carssold from the start of 2006 and onwards support OBDII. I am going to bias this discussion heavily on the BA Falcon and newer, inclusive of BF Falcon and SX/SY Territory, but will include maybe a little but of relevance for other vendors (but not much). The OBDII standard includes a number of onboard 'network protocols' used to connect different computerised modules, or 'ECU's, on a car. Think of OBDII as a standard definition of a 'Portal' for accessing all of the 'Networks' in your car.Īnd by 'Network' I mean just that - a strand of 1 or more wires that links modules in your car over which information can be transmitted back and forth. OBDII is a 'generic term used to describe a standards-based method for accessing a vehicle's self diagnostic and reporting capability'. (As more beers go in, more 'speel' checking will be needed. If I waffle while half munted, then later on we can pull all this together and make a tech article out of it. OK, a few beers in me, especially some nice 8.5% abv Belgian stuff (Gouden Carolus Classic - absolutely AWESOME beer), and I'm going to start waffling. I'm like this with every bloody car I buy.ĬAN bus communication is based on the OSI 7-layer model of communications, and I'm currently a Network Engineer, so there's a natural segue for me. I started by just trying to understand how to do a MCC to ACC upgrade, but I can't control my curiosity. (3) Extend my understanding of how these things work.
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Some of this stuff is already available in software such as Digimoto, but as it uses J1797 low-res stuff I don't think it's that accurate. With access to higher resolution I can potentially run a rolling-dyno and do electronic 0-100km/h times. The basic stuff is already visible - RPM, Speed, Mainfold Pressure etc - at 'low' resolution. By making the display accessible using Media Player, I could theoretically drive th display from the remote. Many people are now putting CarPC's in their cars. (2) To be able to read specific values and put them up on display. (1) To be able to read the custom values from the PCM, BEM, ICC and IC for diagnostics and trouble shooting.