Questions and Answers

Chevrolet Camaro Has A Dead DLC Q. The problem I am having with this vehicle is that I am not getting any voltage at my data link connector [DLC] to power my scan tool. I tested the scan tool on another vehicle and the tool works fine. In my Actron OBD-II scan tool manual in the troubleshooting section for troubleshooting the DLC it says to measure voltage between pins 4 and 16. I got zero voltage on my MM.

Then it says if voltage is less than 8 volts check battery. Battery and its connections are good. Then it says measure resistance between pin 4 and frame. I got 27 ohms. Then it says if there is more than 5 ohms then repair ground circuit. As I re-checked resistance I noticed that resistance went down to about 11 ohms but still more than 5 ohms.

My question is where does the ground for this circuit trace back to or how is it grounded? Or am I headed in the wrong direction and if so how do I restore voltage to the DLC? I also checked all fuses and they were good. There are no problems with the engine starting and running smoothly. Any suggestions with this would be greatly appreciated.

• 1998 Chevrolet Camaro Z28
• 5.7L V-8 LS1
• Automatic transmission
• 132,000 miles
• Fuel Injection
• ABS Brakes
• P/S, A/C,- Cruise control
• Rack and Pinion steering

A. There is most likely a blown fuse somewhere. Re-check all the fuses visually and with a voltmeter. There should be a fuse block under the left side of the dash and one under the hood.