Want to get Air Bag codes? No problem! Want to disable the TPMS light? No problem! Command the HVAC system? No Problem! Turn the wipers on, unlock the doors, turn the lights on or off, check ABS codes, eject a CD or DVD, open the windows, command the injectors off, purge the EVAP lines etc. But with FCA vehicles, it's never an issue when the TIPM is present. Most of us know that once you go beyond the basic OBDII generic powertrain set of codes and parameters, it becomes hard and expensive to do more. Any other manufacturer? Not really.maybe some Nissan/Infiniti's.that's it! The TIPM allows us to communicate with every module in our vehicle using JUST those 2 CAN wires!!! That may not sound exciting, but think of it this way:Ĭan I get body-related trouble codes via CAN pins with a GM? No. UNLESS I request it directly from the TIPM.īut, now for where the TIPM becomes absolutely amazing for any of us wanting more than just standardized engine codes and data. On a TIPM vehicle, nothing happens, and I wouldn't see anything.
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Or, I can use an ELM327 or STN Bluetooth device (for about $20-$30 off Amazon or eBay etc.) and monitor the raw data, in hexadecimal.
On a GM vehicle, I can check with a meter or oscilloscope at pins 6 and 14 of the OBDII connector and see what's going on. In other words, all communication at the OBDII connector via a scan tool, must be REQUESTED before anything will happen. The one downsize is that because of this, there's no "live" activity occurring ever at the OBDII connector.
This is why the OBDII connector of a TIPM-equipped vehicle has ONLY the 2 CAN wires, aside from the mandatory 2 grounds and 1 constant 12v power. The benefit of this is what I just said above. The TIPM in our cars and trucks, used over the past 12 years or so, replaced the FCM (Forward Control Module) and basically acts the centric 'hub' or 'gateway' of all our vehicles on-board communications. Like I said, almost no other vehicle manufacturer (some Nissan's are in this beneficial boat as well though) allows communication with ALL vehicle modules to be possible using just pins 6 & 14 of the OBDII connector aka High and Low Speed CAN wires/pins. But, that doesn't mean every aspect of them is terrible. HOWEVER, because we FCA (Dodge, Chrysler, Jeep) vehicle owners drive vehicles utilizing the infamous TIPM (Totally Integrated Power Module), we most certainly can, without any doubt! The TIPM, for the most part, has a really BAD name! I'm sure if you google 'tipm' you will see all sorts of swear words and lawsuits associated with them. The problem with most vehicle manufacturers is that they use multiple CAN networks, so accessing all the information via the OBDII cable is for the most part, not possible. The reason? To allow regular people, who can't afford thousands of dollars worth of equipment and tools, to be able to do OEM level diagnostics and commands using just a basic ELM327, ELM329 or STN1100(OBDLink) device and their smartphone.
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In an effort to share what I've learned over the years, I decided to start filming some videos for upload to YouTube and learn how to create apps for the mobile devices on android and apple platform. We specialized in a lot of electrical and diagnostic repairs as well as mobile service to wholesale, commercial dealers and retail customers. In 2017 I opened my own small 2 bay shop with a friend who is a licensed technician. I had to teach them everything from how to use the scan tools and pass-thru programming to how to properly read a wiring schematic or diagnose module communication issues. I spent a lot of my time as a manager actually teaching licensed auto techs how to properly diagnose and repair electrical and drivability issues. Which later became a dealership group covering the brands Saturn, Saab, Suzuki, Jaguar, Land Rover, Mitsubishi and Volvo.
In 2008, I became Service Manager of a GM dealer. Mostly because the manufacturer already includes it, or because they make it nearly impossible to alter. Of course, after the "fast and furious" fad wore out for the most part on the general public, the number of customers kept declining and declining until we're at the point now where almost nobody changes or modifies the electronics in their vehicle. I loved the job and the days of the booming car audio and remote start industry.
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I got my Ontario 310A License as an Automotive Electronics & Accessory Technician a few years later. Then, around 2003 I started working as an Automotive Electronics Technician. I just thought that "talking" to your vehicle was the best thing ever. Back then I didn't know much, but I wanted to know everything. I remember spending all of my extra money on all kinds of scan tools. Since 1997, I have been literally OBSESSED with vehicle diagnostics and communication.
A 38 year old from London, Ontario, Canada. Let me start off by introducing who I am: And no, I'm not out to become rich! lol
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