Function Sequence For Ignition Off

When ECM receives Ignition Switch OFF signal (i.e. cut off the ignition power supply), the following components is switched off and the processor power-down is started:

• Pressure regulating valve
• Fuel injectors
• Quantity control valve
• Fuel pump over the FPCM (Fuel Pump Control Module)

Processor power-down is determined by ECM and performed for approximately four seconds. Processor power-down may continue for a few minutes depending on a function, such as on-board diagnosis system and thermal management.

During processor power-down, System Test is performed by ECM and Malfunctioning Memory is updated.