Test A: Scan Tool Does Not Power Up: Description

Data Link Connector (DLC) provides operating power for scan tool through terminal No. 16 (Orange wire) and ground through terminal No. 4 (Black wire). DLC provides class 2 serial data signal through terminal No. 2 (Purple wire) and ground through terminal No. 5 (Black/White wire). Scan tool will power up with ignition switch in OFF position.