Nissan Note E12. Instruction — part 171
COMPONENT PARTS
EC-23
< SYSTEM DESCRIPTION >
[HR16DE]
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Throttle Position Sensor
INFOID:0000000009022446
Electric throttle control actuator consists of throttle control motor,
throttle position sensor, etc. The throttle position sensor responds to
the throttle valve movement.
The throttle position sensor has two sensors. These sensors are a
kind of potentiometer which transform the throttle valve position into
output voltage, and emit the voltage signals to the ECM. The ECM
judges the current opening angle of the throttle valve from these sig-
nals and controls the throttle valve in response to driving conditions
via the throttle control motor.
WARNING LAMPS/INDICATOR LAMPS
WARNING LAMPS/INDICATOR LAMPS : Engine Oil Pressure Warning Lamp
INFOID:0000000009022441
DESIGN/PURPOSE
When engine oil pressure is low, the engine oil pressure warning
lamp informs the driver of low oil pressure to prevent damage to the
engine.
BULB CHECK
Not applicable
OPERATION AT COMBINATION METER CAN COMMUNICATION CUT-OFF OR UNUSUAL SIG-
NAL
For the operation for CAN communications blackout or abnormal signal reception, refer to
.
SYSTEM DIAGRAM
SIGNAL PATH
ECM calculates an engine oil pressure according to a signal transmitted from the engine oil pressure sensor.
When the engine oil pressure is low, ECM transmits the engine oil pressure warning lamp signal to combina-
tion meter via CAN communication. Then the engine oil pressure warning lamp illuminates.
SHUTOFF CONDITION
When any of the following conditions is satisfied:
• Ignition switch: OFF
• Engine oil pressure is the specified value or more.
LIGHTING CONDITION
PBIB0145E
JPNIA1881ZZ
JSBIA2846GB
EC-24
< SYSTEM DESCRIPTION >
[HR16DE]
COMPONENT PARTS
When any of the following conditions is satisfied:
• Ignition switch: ON
• Engine oil pressure is less than specified value.
TIMING CHART
WARNING LAMPS/INDICATOR LAMPS : Malfunction Indicator Lamp (MIL)
INFOID:0000000009022439
DESIGN/PURPOSE
When a malfunction which increases exhaust gases is detected, ECM turns ON MIL and informs the driver of
the necessity of inspection and repair.
When a malfunction which causes damage to the catalyst is
detected, ECM immediately blinks MIL to alert the driver.
BULB CHECK
The bulb turns ON after turning ON the ignition switch (engine stop) and turns OFF after restarting the engine.
OPERATION AT COMBINATION METER CAN COMMUNICATION CUT-OFF OR UNUSUAL SIG-
NAL
For the operation for CAN communication blackout in the combination meter, refer to
.
SYSTEM DIAGRAM
SIGNAL PATH
JPBIA6026GB
JSBIA1315ZZ
JPBIA6021GB
COMPONENT PARTS
EC-25
< SYSTEM DESCRIPTION >
[HR16DE]
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• When the lighting conditions of the malfunction indicator lamp (MIL) are satisfied, ECM transmits a malfunc-
tion indicator lamp (MIL) signal to the combination meter via CAN communication.
• The combination meter turns ON or blinks the malfunction indicator lamp (MIL), according to a signal
received from ECM.
LIGHTING CONDITION
When all of the following conditions are satisfied:
• Ignition switch: ON
• DTC which influences on exhaust gasses is judged.
For DTCs that the malfunction indicator lamp turns ON and the number of DTC diagnosis trips, refer to
SHUTOFF CONDITION
When any of the following conditions is satisfied:
• Ignition switch: OFF
• Erase DTC
NOTE:
For the conditions of erasing DTC, refer to
EC-43, "DIAGNOSIS DESCRIPTION : DTC and Freeze Frame
TIMING CHART
JPBIA6022GB
EC-26
< SYSTEM DESCRIPTION >
[HR16DE]
STRUCTURE AND OPERATION
STRUCTURE AND OPERATION
Positive Crankcase Ventilation
INFOID:0000000009022447
This system returns blow-by gas to the intake manifold.
The positive crankcase ventilation (PCV) valve is provided to conduct crankcase blow-by gas to the intake
manifold.
During partial throttle operation of the engine, the intake manifold sucks the blow-by gas through the PCV
valve.
Normally, the capacity of the valve is sufficient to handle any blow-by and a small amount of ventilating air.
The ventilating air is then drawn from the air inlet tubes into the crankcase. In this process the air passes
through the hose connecting air inlet tubes to rocker cover.
Under full-throttle condition, the manifold vacuum is insufficient to draw the blow-by flow through the valve.
The flow goes through the hose connection in the reverse direction.
On vehicles with an excessively high blow-by, the valve does not
meet the requirement. This is because some of the flow will go
through the hose connection to the air inlet tubes under all condi-
tions.
PBIB2962E
PBIB1588E
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