Prelude L4-2056cc DOHC (1990)
Igniter: Description and Operation
Igniter Unit
The igniter unit, mounted on the right strut tower, controls ignition timing and is itself controlled by the ECU. The ECU contains memories for basic
ignition timing at various engine speeds, manifold pressures and coolant temperatures. The ECU retards or advances the timing to match these
memories through the igniter unit.
