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#ALDL CONNECTOR CODE#

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? 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 ! -) 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. In this connector are two terminals that need to be connected with a wire jumper.

#ALDL CONNECTOR CODE#

The bridge should normally connect pin A and B, not A and G ! To start diagnostic trouble code gathering locate the ALDL (assembly line data link) connector which is located on the driver’s side lower part of the dash on most cases. 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. If it passes the above test, the hardware has passed a basic minimal test.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) If your cable fails the above test, it will almost certainly need to come back to us for repair.

Finally, click the “Test For Valid Interface Using Settings” to perform a test on the cable.

Next, select “Configure Plug-in Component” Then make sure “Standard Serial” is selected and the COM port shown matches the COM port of your cable. Then make sure “TunerPro Data Acquisition I/O Interface” is selected.

Go to Tools … Preferences and select “Use Plug-in” for Interface type.

Load a valid XDF / ADS-ADX combination for your vehicle.

Start TunerPro RT with your cable plugged into your computer but unplugged from the vehicle.

You will need to have TunerPro RT version 5.0 or later installed. Take a look at the USB troubleshooting guide if you have any questions or concerns here. Before you continue, you should have verified USB connectivity and you will need to know which COM port your cable is using. The first step towards determining if your ALDU1 is working correctly is to look at the USB side. Take a look at the OBD1 GM section of our online store here Test Procedure Save preferred products you can export and share.

Pins 4 and 5 are connected to RJ45 pin 1 Shop 1,000+ rugged connectors, available for purchase on TE.com.

This is the late model ALDL connector used in 1995:

pin E and pin M are connected to RJ45 pin 3.

This is the 86-94 original ALDL connector: In the event you need to build a custom cable, use the following pin outs for the RJ45 connector: It can be interfaced with many pieces of software, including TunerPro. The ALDU1 can be purchased by itself, or as a combo with either the CABL1 or CABL2.ĬABL1 is used for ~88-94 GM OBD1 vehicles with a rectangular ALDL connector like this:ĬABL2 is used only on 95 (and some late-year 94) vehicles that still speak ALDL but have the D shaped “OBD2-style” connector like this: The ALDU1 is compatible with the CABL1 and the CABL2, which are interface cables that connect to GM OBD I and OBD II vehicle respectively. The ALDU1 is a datalogger designed to work with OBD I GM vehicles.