My jumper (A and G) is putting the Groung to Bidirectional Data Lead and I have no idea what it should do, no idea if the bridge A-G on alarm ALDL should be there.Īlarm_ALDL_drawing. Then to make a bridge between A and H (on picture A is the ground terminal left side first at bottom, H is the Alarm controller terminal 5 on right side). I found this description (see photo) on service manual, section ML, where it's written that THERE IS an existing bridging link, but does not say which pins are shorted! So, maybe the jumper was on wrong connector. On my S4 there are no parking sockets for this 2 connectors, they are floating in the air (I am sure because I have removed the alarm system controller from behind the glove box, and I remained surprised when I did not find the parking sockets!). The jumper on your SIR/ABS ALDL is between A and G like the bridge I found in my car?
ALDL PLUG PC
Of course should Freescan or your laptop have problems, maybe you will be glad you have this bridge, so maybe keep it "just in case", but make sure you correct its wiring first ! -) The simplest ALDL interface circuit i could find consisted of one transistor and two 10k resistors it simply connected the data pin on the ALDL plug to the RxD(Receive Data) port on the RS232 on the PC through the transistor. So since you have Freescan, you don't need this bridging plug anymore. and shorted the wrong pin ! And he also forgot to unplug the bridge before selling the car to you -) I assume Lotus sells this bridge for too much, some previous owner tried to make his own to save money. The bridge should normally connect pin A and B, not A and G ! Only problem is that as you say, and as shows your pic, the bridge you have here connects pins A and G, which actually grounds the ALDL line ! So no wonder that Freescan can't connect to the ECU, it is muted ! -) It's a poor man's freescan if you will -) What you have is a nice bridging plug which is used to switch the ECU into diagnostic mode, in this mode, the ECU will use the CEL (by blinking it) to indicate trouble codes. For more than 100 years, Delphi has focused on providing greater product performance and driving tomorrows technology. The standard Diagnostic Plugs are a Round Deutsch plug with 6 or 9 Pin Postions and for historic reasosn the Rectangular 12 Pin ALDL plug that is used by. For the assembly plant test system computer that was connected to this vehicle connector and known by the same name, see the article IBM Series/1. OBD offers decent diagnostic capabilities, while OBD2 features better-messaging formats and signaling protocols.It's all explained in your workshop manual, please see section EMH1 page 9 (talks about the bridging plug you have here) and EMH4 page 5 (which explicits the wiring of the ECU and ALDL plug) Do you need an ALDL plug for an OBD2 connector Assembly Line Diagnostic Link or ALDL is a proprietary on-board diagnostics system developed by General Motors before the standardization of OBD-2.
![aldl plug aldl plug](https://m.media-amazon.com/images/I/71CN1ihGHWL._AC_SL1500_.jpg)
OBD was used in the early years of the vehicle manufacturing industry. Main Differences of OBD and OBD2 OBD is connected to the console of a vehicle, while OBD is remotely connected. What is the difference between OBD and obd2? The OBD-II port is where the Hum System is installed so that the network can communicate with the vehicle directly. The On-Board Diagnostics II ( OBD-II) port is used to access the vehicle's computer for various tasks, such as emissions tests and diagnostics. Keeping this in view, what is the obd2 port used for? Because i can buy ELM327 obd2 to usb adapter here, so if it's compatible with the ecu and making an aldl to obd2 cable comes to a result, then i hope, i can scan the car with a software. These are known as protocols, and are specific to vehicle manufacturers. Currently beside of making an aldl to obd2 adapter, i'm struggling to find the compatible chip with the ecu of the car. You will find below several pictures which will help you find your OBD connector in your car.
![aldl plug aldl plug](http://aldlcable.com/photos/8948.jpg)
Every system is mostly the same, but there are slight variations. As a result, in 1996 car manufacturers started to equip cars and trucks with an OBD-II port. The data link connector ( DLC) is the multi-pin diagnostic connection port for automobiles, trucks, and motorcycles used to interface a scan tool with the control modules of a given vehicle and access on-board diagnostics and live data streams.Īlso, are all obd2 ports the same? However, it had many problems and shortfalls. For the assembly plant test system computer that was connected to this vehicle connector and known by the same name, see the article IBM Series/1.Īlso question is, what is a data link connector in a car? Assembly Line Diagnostic Link or ALDL is a proprietary on-board diagnostics system developed by General Motors before the standardization of OBD-2. I espescially like that the cable is terminated with an ALDL socket not merely bare pins like many competitors products.