Toyota Corolla (E120): Window defogger system

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For vehicles equipped with srs airbag and seat belt pretensioner
Hint: the vehicle is equipped with an srs (supplemental restraint system), such as the horn button assembly, the instrument panel passenger airbag assembly, the front seat airbag assembly, the center airbag sensor assembly, the front airbag sensor, the side airbag sensor and the seat belt p ...

Circuit description
Hint: these dtcs indicate a malfunction related to the primary circuit. If dtc p0351 is displayed, check the no.1 Ignition coil with igniter circuit. If dtc p0352 is displayed, check the no.2 Ignition coil with igniter circuit. If dtc p0353 is displayed, check the no.3 Ignition coil ...

Source voltage drop
The srs is equipped with a voltage–increase circuit (dc–dc converter) in the airbag sensor assy center in case the source voltage drops. When the battery voltage drops, the voltage–increase circuit (dc–dc converter) functions to increase the voltage of the srs to normal voltage. ...