Electronic Spark Advance (Esa) - Toyota 22R-E Service Manual

IG–3
IGNITION SYSTEM – (22R– E)
SYSTEM CIRCUIT

ELECTRONIC SPARK ADVANCE (ESA)

The ECM is programmed with data for optimum ignition timing under any and all operating
conditions. Using data provided by sensors which monitor various engine functions (rpm, intake
air volume, engine temperature, etc.) the microcomputer (ECM) triggers the spark at precisely the
right instant.