Nissan Sentra Service Manual: Sensor power supply 2 circuit
Description
ECM supplies a voltage of 5.0 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 simultaneously in the sensors belonging to the same group as the shorted-circuit sensor.
Sensor power supply 1
- Battery current sensor
- Crankshaft position (CKP) sensor (POS)
- Throttle position (TP) sensor
- Accelerator pedal position (APP) sensor 1
NOTE:
If sensor power supply 1 circuit is malfunctioning, DTC P0643 is displayed.
Sensor power supply 2
- Camshaft position (CMP) sensor (PHASE)
- Mass air flow (MAF) sensor
- Engine oil pressure (EOP) sensor
- Exhaust valve timing (EVT) control position sensor
- Accelerator pedal position (APP) sensor 2
- Intake manifold runner control valve position sensor
Diagnosis Procedure
1.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.
Is the inspection result normal? YES >> GO TO 4.
NO >> GO TO 2.
2.CHECK ACCELERATOR PEDAL POSITION SENSOR 2 POWER SUPPLY CIRCUIT-2
- Turn ignition switch OFF.
- Disconnect ECM harness connector.
- Turn ignition switch ON.
- Check the continuity between APP sensor harness connector and ECM.
CVT models
Is the inspection result normal? YES >> GO TO 3.
NO >> Repair or replace error-detected parts.
3.CHECK SENSOR POWER SUPPLY CIRCUITS
Check harness for short to power and short to ground, between the following terminals.
Is the inspection result normal? YES >> GO TO 4.
NO >> Repair or replace error-detected parts.
4.CHECK COMPONENTS
Check the following.
Is the inspection result normal? YES >> GO TO 5.
NO >> Repair or replace malfunctioning component.
5.CHECK APP SENSOR
Check APP sensor. Refer to EC-436, "Component Inspection (APP Sensor)".
Is the inspection result normal? YES >> Check intermittent incident. Refer to GI-39, "Intermittent Incident".
NO >> Replace accelerator pedal assembly. Refer to ACC-3, "Removal and Installation".
P2138 APP Sensor
DTC Logic
DTC DETECTION LOGIC
NOTE:
If DTC P2138 is displayed with DTC P0643, first perform the trouble
diagnosis for DTC P0643. Refer to
EC-353, "DTC Logic".
DTC No.
CONSUL ...
Brake pedal position switch
Component Function Check
1.CHECK BRAKE PEDAL POSITION SWITCH FUNCTION
With CONSULT
Turn ignition switch ON.
Select “ENGINE” using CONSULT.
Select “BRAKE SW1” in “DA ...
Other materials:
Component parts
Component Parts Location
EPS control unit (view with steering
column removed from vehicle)
EPS motor (view with steering column
removed from vehicle)
Torque sensor (view with steering
column removed from vehicle)
ABS actuator and electric unit (control
unit)
EC ...
Cooling fan
Component
Fan shroud and motor assembly
WARNING:
Do not remove the radiator cap when the engine is hot. Serious burns
could occur from high-pressure
engine coolant escaping from the radiator. Wrap a thick cloth around the cap.
Slowly push down and
turn it a quarter turn to allow b ...
P2859 Clutch A Pressure
DTC Logic
DTC DETECTION LOGIC
DTC
CONSULT screen terms
(Trouble diagnosis content)
DTC detection condition
Possible causes
P2859
CLUTCH A PRESSURE
(Clutch A Pressure Disengagement
Performance)
The detection conditions continuously for 200
msec or more un ...
