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CHECK BEFORE CONNECTING — Investigate scan tool communication problems at the DLC. Access all 16 OBD2 pins to check supply voltage, grounds and signal activity before further diagnosis. READ INDIVIDUAL PINS — Check voltage without reaching for a separate meter. SELECT cycles through the 16 pins on the built-in display, with 0.1V resolution; RESET returns to pin 16. WATCH BATTERY VOLTAGE — Get an audible warning below 11.8V on 12V systems or 23.6V on 24V systems during module programming. A self-resetting PTC fuse provides output overload protection. KEEP THE SCANNER CONNECTED — Use the pass-through connection while testing 12V or 24V vehicles. LEDs indicate pulse activity on CAN and other supported lines to guide further measurements. CONNECT YOUR TEST EQUIPMENT — Reach the DLC with the attached 0.8m cable. Includes two pin adapters for 4mm connections, plus 16 test sockets for multimeter or oscilloscope measurements.