Data link is not working, is there a fuse? - 2001 Volkswagen Beetle

A link error meaning the scanner wont read or the computer wont talk to another component? Check the fuse for the ECM

https://s1.postimg.org/2l474r3mtb/cigar_fuse.jpg

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I looked at Silverado 2500 info. Cigar fuse is in under hood fuse block. That fuse also supplies voltage to pin 16 at data link connector. Use a test lite, check for voltage.

Make sure battery has a full charge and battery connections all good. Check fusible links where applicable. Any component that doesn't work and is fuse protected, not only check the fuse, check the fuse circuit for voltage, use a test lite.
The wiring diagram is for starter circuit, you can see the fuses. Any testing for starter motor, make sure tranny is in park or neutral and parking brake is set. It is possible to jump crank relay to see if starter motor will crank, but, that doesn't mean it will start. Make sure vehicle can't move.

Typically the data link connector gets its power from the cigar fuse. On your vehicle there is a fuse in the underhood fuse block labeled ALDL (assembly line data link).

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

check fuse 41 in the central fuse block. I bet you 12 volt outlets (cigar lighter) is not working also?

Let me know if you have any questions and I'll be happy to answer them. Thank you for using fixya.com

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

check fuse #17 in the passenger compartment fuse box, it is the power supply for the data link connector

Fuse 17 a 20A (Cigar Lighter, OBD2 Data Link
Connector)

From 2000 Buick Regal - Owners Manual, check the position CIGAR LTR,
DATA LINK for Cigarette Lighter, Auxiliary / Power Connection (Power Drop), Data Link on the Instrument Panel Fuse Block.

Check page 304 and next for other details.

Hope helps and remember rated this.

I bought a replacement keyless fob and these instructions came with it - and they worked. They refer to some illustrations but with Haynes manual and maybe some web searching you should be able to figure it out.

1. Turn ignition switch OFF .

2. Use a 3 amp fused jumper wire (two clip leads attached to either side of a 3 amp fuse, or a paperclip works too) and connect terminals at the data link connector as illustrated below (black wire to black/white wire). The data link connector is located on the bottom of dash panel. Connect fused jumper wire between Data Link Connector (DLC) terminals no. 8 (black/white wire) and no. 4 (black wire)

3. Close all the doors.

4. Turn ON the ignition switch.

5. The doors will lock and unlock to confirm it is in programming mode.

6. Press and hold LOCK and UNLOCK on one of the transmitters for 30 seconds.

7. After a 10-15 second delay the doors will LOCK and UNLOCK. DO NOT TURN OFF THE IGNITION!

8. Repeat step 5 for each additional transmitter. (Even transmitters that worked previously must be reprogrammed).

9. Disconnect jumper wire from data link connector.

10.Turn the ignition off and test all transmitters to verify function.

I have the same problem with my 04 stratus cant get car inspected cause data link so the cant inspect emmisons, anyway i was told it may be the bcm (body control module) if it is buy a used one from junk yard they are a little expensive. or it could be relay since fuses usually dont do so many things (dome llight, power locks, radio, data link)

try replacing the fuse to the cig lighter. that is where the data link gets power from that cig fuse. good luck