System Description
INPUT/OUTPUT SIGNAL CHART
|
Sensor |
Input signal to ECM |
ECM function |
Actuator |
|
Engine oil pressure sensor |
Engine pressure |
Engine protection control
|
Combination meter
|
|
Crankshaft position sensor (POS) |
Engine speed |
SYSTEM DESCRIPTION
- The engine protection control at low engine oil pressure warns the driver of a decrease in engine oil pressure by the oil pressure warning lamp a before the engine becomes damaged.
- When detecting a decrease in engine oil pressure at an engine speed less than 1, 000 rpm, ECM transmits an oil pressure warning lamp signal to the combination meter. The combination meter turns ON the oil pressure warning lamp, according to the signal.
Decrease in engine oil pressure
Engine speed
Combination meter
Oil pressure warning lamp
Detection
Less than 1, 000 rpm
ON*
1, 000 rpm or more
ON
*: When detecting a normal engine oil pressure, ECM turns OFF the oil pressure warning lamp.