Nissan Sentra B18 (2020-2025) Service Manual: Sensor Power Supply 2 Circuit
Diagnosis Procedure
ECM supplies a voltage of 5 V to some of the sensors systematically divided into 2 groups, respectively.Accordingly, when a short circuit develops in a sensor power source, a malfunction may occur simultaneouslyin the sensors belonging to the same group as the short-circuited sensor.
Sensor power supply 1
-
APP sensor 1
-
Crankshaft position sensor
-
EGR volume control valve position sensor
-
Exhaust camshaft position sensor
-
Intake manifold runner control valve position sensor
-
Manifold absolute pressure sensor
-
Throttle position sensor
If sensor power supply 1 circuit is malfunctioning, DTC P0643 is displayed.
Sensor power supply 2
-
APP sensor 2
-
Intake camshaft position sensor
-
Engine oil pressure sensor
-
Fuel rail pressure sensor
-
Mass air flow sensor
-
Refrigerant pressure sensor
-
CHECK ACCELERATOR PEDAL POSITION SENSOR 2 POWER SUPPLY CIRCUIT-1
-
Turn ignition switch OFF.
-
Disconnect accelerator pedal position (APP) sensor harness connector.
-
Turn ignition switch ON.
-
Check the voltage between APP sensor harness connector and ground.
+
−
Voltage
(Approx.)
APP sensor
Connector
Terminal
E12
5
Ground
5 V
Is the inspection result normal?
YES >>INSPECTION END
NO >>GO TO 2.
-
-
CHECK ACCELERATOR PEDAL POSITION SENSOR 2 POWER SUPPLY CIRCUIT-2
-
Turn ignition switch OFF.
-
Disconnect ECM harness connector.
-
Check the continuity between APP sensor harness connector and ECM harness connector.
APP sensor
ECM
Continuity
Connector
Terminal
Connector
Terminal
E12
5
E16
152
Existed
Is the inspection result normal?
YES >>GO TO 3.
NO >>Repair or replace malfunctioning part.
-
-
CHECK SENSOR POWER SUPPLY 2 CIRCUIT
Check harness for short to power and short to ground, between the following terminals.
ECM
Sensor
Connector
Terminal
Name
Connector
Terminal
E16
152
APP sensor 2
E12
5
F24
24
Intake camshaft position sensor
F39
1
27
Mass air flow sensor
F31
1
43
Refrigerant pressure sensor
E35
3
Engine oil pressure sensor
F2
3
Fuel rail pressure sensor
F101
1
Is the inspection result normal?
YES >>GO TO 4.
NO >>Repair or replace malfunctioning part.
-
CHECK COMPONENTS
Check the following.
-
Accelerator pedal position sensor 2 (Refer to Component Inspection.)
-
Intake camshaft position sensor (Refer to Component Inspection.)
-
Engine oil pressure sensor (Refer to Component Inspection.)
-
Fuel rail pressure sensor (Refer to Component Inspection.)
-
Mass air flow sensor (Refer to Component Inspection.)
-
Refrigerant pressure sensor (Refer to Diagnosis Procedure.)
Is the inspection result normal?
YES >>Refer to Intermittent Incident.
NO >>Replace malfunctioning part.
-
Refrigerant Pressure Sensor
Component Function Check
Component Function Check
CHECK REFRIGERANT PRESSURE SENSOR
FUNCTION
Start engine and warm it up to normal
operat ...
Throttle Control Motor
Component Inspection
Component Inspection
CHECK THROTTLE CONTROL MOTOR
Turn ignition switch OFF.
Disconnect electric throttle con ...
Other materials:
How to Erase Permanent Dtc
Description
Description
WHEN A DTC IS STORED IN TCM
When a DTC is stored in TCM and MIL is ON, a permanent DTC is
erased with MIL shutoff if the same malfunction is not detected after performing
the driving pattern for MIL shutoff three times in a raw.
Note:
The following timing ...
Diagnosis System (bcm)
Common Item
Consult Function (bcm - Common Item)
CONSULT Function (BCM - COMMON ITEM)
BCM
Refer to CONSULT Function (BCM - COMMON ITEM).
Head Lamp
Consult Function (bcm - Head Lam ...
Service equipment
RECOVERY/RECYCLING RECHARGING EQUIPMENT
Be certain to follow the manufacturer’s instructions for machine operation
and machine maintenance. Do not
introduce any refrigerant other than that specified into the machine.
ELECTRICAL LEAK DETECTOR
Be certain to follow the manufacturer’s ...
