Control Outline

When ignition switch is turned to the START position, the ECM receives the start signal (ignition switch status signal) from BCM and actuates the starter relay, pressure regulating valve, fuel injectors, quantity control valve, and fuel pump (via FPCM).

The ECM coordinates the injection sequence when it start to use signals from the crankshaft position sensor and camshaft position sensor.

The start injection quantity control in the ECM serves to calculate a specific start injection quantity at engine start irrespective of the position of the accelerator pedal position sensor.

With automatic transmission, when the engine cranking speed reaches 400 to 700 RPM, or it takes 5 to 40 seconds to start (depending on coolant temperature), the ECM interrupts the negative activation of the starter relay and thus terminates the starting procedure.

With manual transmission, when the engine cranking speed reaches 400 to 700 RPM, the ECM interrupts the negative activation of the starter relay and thus terminates the starting procedure.