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SYSTEM ECM-41 < SYSTEM DESCRIPTION > [MR20DD] C D E F G H I J K L M A ECM N P O • When deceleration (accelerator pedal ON → OFF), ECM controls the engine speed by optimizing throttle opening to minimize shift shock and exhaust gas emission. COOLING FAN CONTROL COOLING FAN CONTROL : System Description INFOID:0000000010702822 System Diagram SYSTEM DESCRIPTION ECM controls cooling fan speed corresponding to vehicle speed, engine coolant temperature, refrigerant pres- Cooling Fan Operation ECM transmits a pulse duty (PWM) signal to IPDM E/R. Cooling Fan Relay Operation The ECM controls cooling fan relays in IPDM E/R through CAN communication line. INTAKE VALVE TIMING CONTROL JSBIA5006GB : Less than 30% (OFF ← low-speed) : More than 40% (OFF → low-speed) : Less than 50% (low-speed ← high-speed) : More than 60% (low-speed → high-speed) JSBIA5007GB Cooling fan speed Cooling fan relay 1 2 Stop (OFF) OFF OFF Low (LOW) ON OFF High (HI) ON ON |