Nissan Murano: System / Engine Protection Control at Low Engine Oil Pressure
System Description
SYSTEM DIAGRAM

SYSTEM DESCRIPTION
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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 before the engine becomes damaged.
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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.
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When detecting a decrease in engine oil pressure at an engine speed 1,000 rpm or more, 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 signals. When detecting a decrease in engine oil pressure, ECM cuts fuel if the engine speed exceeds the specified value.
| Decrease in engine oil pressure | Engine speed | Combination meter | Fuel cut |
| Oil pressure warning lamp |
| Detection |
Less than 1,000 rpm |
ON* |
NO |
| 1,000 rpm or more |
ON |
YES |
*: When detecting a normal engine oil pressure, ECM turns OFF the oil pressure warning lamp.
System Description
SYSTEM DIAGRAMINPUT/OUTPUT SIGNAL CHART Sensor Input signal to ECM ECM function Actuator
Crankshaft position sensor (POS)
Engine speed and piston position
Exhaust valve timing control
Exhaust valve timing control solenoid valve
Camshaft position sensor (PHASE)
Engine oil temperature sensor
Engine oil temperature
Exhaust valve timing control position sensor
Exhaust valve timing signal
Combination meter
CAN communication
Nissan Murano Vehicle speed signal
SYSTEM DESCRIPTIONThis mechanism hydraulically controls cam phases continuously with the fixed operating angle of the exhaust valve...
System Description
SYSTEM DIAGRAMSYSTEM DESCRIPTIONThe fuel filler cap warning system alerts the driver to the prevention of the fuel filler being left uncapped and malfunction occurrences after refueling, by turning ON the fuel filler cap warning display on the combination meter...
Other information:
DTC Description
DTC DETECTION LOGIC
A high voltage from the sensor is sent to ECM under light load driving condition.
A low voltage from the sensor is sent to ECM under heavy load driving condition.
DTC
CONSULT screen terms
(Trouble diagnosis content)
DTC detection condition
P0101
MAF SEN/CIRCUIT-B1
(Mass or volume air flow “A” circuit range/performance)
1
Diagnosis condition
—
Signal (terminal)
Voltage signal transmitted from MAF sensor to ECM
Threshold
A high voltage from the sensor is sent to ECM under light load driving condition
Diagnosis delay time
—
2
Diagnosis condition
—
Signal (terminal)
Voltage signal transmitted from MAF sensor to ECM
Threshold
A low voltage from the sensor is sent to ECM under heavy load driving condition
Diagnosis delay time
—
POSSIBLE CAUSE
Harness and connectors (The sensor circuit is open or shorted...
Exploded View
1.
NATS antenna amp.
2.
Push-button ignition switch
Removal and Installation
REMOVALRemove the shift selector finisher. Refer to Exploded View.
Release the pawl on each side of the push-button ignition switch (1) and remove from the shift selector finisher (2)...