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Home >> Honda >> 2013 >> Insight Base >> Repair and Diagnosis >> Engine Performance >> System >> Advanced Diagnostics >> DTC U1221 (35): Motor Control Module (MCM) Lost Communication with DC-DC Converter >> Enable Conditions

Enable Conditions

Condition Minimum Maximum
Elapsed time after the ignition switch is turned to ON (II) 5 seconds -
Battery module voltage 40 V -
Battery voltage 7.5 V -
No active DTCs set (prevents monitor from running) P0602 (91), P0602 (92), P062F (60), P06B1, P0A1B, P0A3C, P0A3F, P0A5E, P0A5F, P0A61, P0A62, P0A64, P0A65, P0A78, P0A7E, P0AC0, P0AC1, P0AC2, P0AE1, P0B0F, P0B10, P0B11, P0BE6, P0BEA, P0BEE, P0BFD, P1437, P1440, P1570, P1575, P1586, P15A5, P1634, U0038, U0311, U0312, U1204