Nissan Cube. Manual - part 375
EC-386
< DTC/CIRCUIT DIAGNOSIS >
[MR18DE]
P2127, P2128 APP SENSOR
P2127, P2128 APP SENSOR
Description
INFOID:0000000009947521
The accelerator pedal position sensor is installed on the upper end
of the accelerator pedal assembly. The sensor detects the accelera-
tor position and sends a signal to the ECM.
Accelerator pedal position sensor has two sensors. These sensors
are a kind of potentiometer which transform the accelerator pedal
position into output voltage, and emit the voltage signal to the ECM.
The ECM judges the current opening angle of the accelerator pedal
from these signals and controls the throttle control motor based on
these signals.
Idle position of the accelerator pedal is determined by the ECM
receiving the signal from the accelerator pedal position sensor. The
ECM uses this signal for the engine operation such as fuel cut.
DTC Logic
INFOID:0000000009947522
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 8 V at idle.
>> GO TO 2.
2.
PERFORM DTC CONFIRMATION PROCEDURE
1.
Start engine and let it idle for 1 second.
2.
Check DTC.
Is DTC detected?
YES
>> Go to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000009947523
1.
CHECK GROUND CONNECTION
1.
Turn ignition switch OFF.
2.
Check ground connection E38. Refer to
PBIB1741E
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P2127
Accelerator pedal position
sensor 2 circuit low input
An excessively low voltage from the APP
sensor 2 is sent to ECM.
• Harness or connectors
(APP sensor 2 circuit is open or shorted.)
[Crankshaft position sensor (POS) circuit
is shorted.]
(Refrigerant pressure sensor circuit is
shorted.)
(EVAP control system pressure sensor
circuit is shorted.)
(Battery current sensor circuit is shorted.)
• Accelerator pedal position sensor
(APP sensor 2)
• Crankshaft position sensor (POS)
• Refrigerant pressure sensor
• EVAP control system pressure sensor
• Battery current sensor
P2128
Accelerator pedal position
sensor 2 circuit high input
An excessively high voltage from the APP
sensor 2 is sent to ECM.