Cooling fan control : system diagram
Cooling fan control : system description
INPUT/OUTPUT SIGNAL CHART
Sensor | Input signal to ECM | ECM function | Actuator |
Crankshaft position sensor (POS) Camshaft position sensor (PHASE) | Engine speed*1 Piston position | Cooling fan speed request signal | IPDM E/R ↓ Cooling fan relay ↓ Cooling fan motor |
Engine coolant temperature sensor | Engine coolant temperature | ||
Battery | Battery voltage*1 | ||
Refrigerant pressure sensor | Refrigerant pressure | ||
Combination meter | Vehicle speed signal*2 | ||
BCM | A/C ON signal*2 Blower fan signal*2 |
*1: The ECM determines the start signal status by the signals of engine speed and battery voltage.
*2: This signal is sent to ECM through CAN communication line.
SYSTEM DESCRIPTION (EXCEPT FOR SINGLE CONNECTOR COOLING FAN WITHOUT A/C)
ECM controls cooling fan speed corresponding to vehicle speed, engine coolant temperature, refrigerant pressure, air conditioner ON signal. Then control system has 3step control [HIGH/LOW/OFF].
Cooling Fan Operation
Cooling Fan Relay Operation
The ECM controls cooling fan relays through CAN communication line.
Cooling fan speed | Cooling fan low relay | Cooling fan high relay | Cooling fan relay |
Stop (OFF) | OFF | OFF | OFF |
Low (LOW) | ON | OFF | OFF |
High (HI) | ON | ON | ON |
SYSTEM DESCRIPTION (FOR SINGLE CONNECTOR COOLING FAN WITHOUT A/C)
ECM controls cooling fan speed corresponding to vehicle speed, engine coolant temperature, refrigerant pressure, air conditioner ON signal. Then control system has 2step control [HIGH/OFF].
Cooling Fan Operation
Cooling Fan Relay Operation
The ECM controls cooling fan relays through CAN communication line.
Cooling fan speed | Cooling fan low relay |
Stop (OFF) | OFF |
Operate (HI) | ON |
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Throttle valve closed position
learning
Description
Throttle Valve Closed Position Learning is a function of ECM to learn the
fully closed position of the throttle
valve by monitoring the throttle position sensor output signal. It must be
performed each time harness connector
of electric throttle control actuator or ECM is discon ...
Fuel tank
Exploded View
1. Fuel tank 2. Fuel tank mounting band (RH) 3. Fuel tank mounting band (LH)
4. Clamp 5. Fuel filler hose 6. Fuel filler tube
7. Grommet 8. Fuel filler cap 9. Clamp
10. Vent hose
Removal and Installation
WARNING:
Be sure to read "General Precautions" before working on the fu ...