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Page Title: Table 2-27. ECB/ATEC Wire Harness Connector MC12 and MC9
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TM 9-2320-364-20-2      2-875 (1)   Disconnect connectors MC50 and MC51. (2)   Loosen screw and disconnect connector MC9 from ATEC ECU. (3)   Is there continuity on wire 210A between connectors MC12, terminal 1 and MC9, terminal 2C? (a)   If there is no continuity, repair wire (see schematic Fig 2-20) or notify DS Maintenance. (b)   If there is continuity, wire 210A is OK. (4)   Repeat Step (3) for terminals and connectors listed in Table 2-27. (5)   Connect connector MC9 to ATEC ECU and tighten screw. CONTINUITY TEST Remove all jewelry such as rings, dog tags, bracelets, etc.  If jewelry or tools contact positive electrical circuits, a direct short may result.  Damage to equipment, injury or death to personnel may occur. Circuit breakers CB5, CB6, CB12, CB20, CB22, CB23 and relays R3, R13 - R19, R26, R28, R32, R33 are always electrically hot and can cause severe injury to personnel.  Care must be exercised when working under the electrical circuit board cover. The following test checks continuity between the terminals on connectors MC12 and the other terminals on the ECB/ATEC wire harness.   Table 2-27 lists the terminal numbers on connector MC12, the wire connected to them and terminal at the other end of the harness.   Terminals on connector MC9 match those on connector MC12. Table 2-27. ECB/ATEC Wire Harness Connector MC12 and MC9. NOTE MC12/MC9 Terminal Wire MC12/MC9 Terminal Wire 1 2 3 4 210A 204 221 206 5 6 7 11 220 218 219 212

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