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Home >> Honda >> 2009 >> S2000 Base >> Repair and Diagnosis >> Engine Performance >> System >> Advanced Diagnostics >> DTC P0685: Engine Control Module (ECM) Power Control Circuit/Internal Circuit Malfunction >> Diagnosis Details >> Conditions for illuminating the MIL
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Conditions for illuminating the MIL

When a malfunction is detected during the first drive cycle, a Temporary DTC is stored in the ECM memory. If the malfunction recurs during the next (second) drive cycle, the MIL comes on and the DTC and the freeze frame data are stored.