System Description
NOTE:
If DTC P1217 is displayed with DTC U1000 or U1001, first perform the trouble diagnosis for DTC U1000, U1001. Refer to
"DTC U1000, U1001 CAN COMMUNICATION LINE
".
Cooling Fan Control
ECM FUNCTION CHART
| Sensor | Input Signal to ECM | ECM function | Actuator | ||||
|---|---|---|---|---|---|---|---|
| Crankshaft position sensor (POS) Camshaft position sensor (PHASE) |
Engine speed(1) | Cooling fan control | Cooling fan relays | ||||
| Battery | Battery voltage(1) | ||||||
| Wheel sensor | Vehicle speed(2) | ||||||
| Engine coolant temperature sensor | Engine coolant temperature | ||||||
| Air conditioner switch | Air conditioner ON signal | ||||||
| Refrigerant pressure sensor | Refrigerant pressure | ||||||
|
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The ECM controls the cooling fan corresponding to the vehicle speed, engine coolant temperature, refrigerant pressure, and air conditioner ON signal. The control system has 3-step control [HIGH/LOW/OFF].