3Vz–E - Toyota 22R-E Service Manual

IG–13
IGNITION SYSTEM – (3VZ– E)
(3VZ–E)
DESCRIPTION
The ECM is programmed with data for optimum ignition timing under ail operating conditions.
Using data provided by sensors which monitor various engine functions (RPM, intake air volume,
engine coolant temperature, etc.), the microcomputer (ECM) triggers the spark at precisely the
right instant.