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Home >> Mazda >> 2003 >> MPV ES >> Repair and Diagnosis >> Engine Performance >> Theory and Operation >> Engine Controls [Theory & Operation] >> Ignition Systems >> Ignition Timing Control Systems >> Detonation (Knock) Retard Operation

Detonation (Knock) Retard Operation

Ignition retard system consists of a Knock Sensor (KS) and PCM. The KS detects engine detonation (knocking) in the engine and sends a signal to the PCM. The PCM retards ignition timing until KS input is no longer present.