B Series Truck 2WD L4-2184cc 22L 2200 Ignition Switch Diagrams
Ignition Switch: Description and Operation
The Ignition Switch sends both "START" position and "ON" position signals to the ECU.
When various other parameters have been met, the ECU utilizes ignition "ON" as the signal to active the airflow sensor burn-off control system.
The ECU utilizes the "START" signal in its calculations for controlling these outputs:
Fuel injection quantity and timing
ISC valve
Pressure regulator control solenoid valve
A/C relay/cut-off
Ignition timing control (igniter)
