2010 NISSAN LATIO Service Repair Manual

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Page 2233 of 3745

NISSAN LATIO 2010 Service Repair Manual EC-968
< SERVICE INFORMATION >[MR18DE]
DTC P2122, P2123 APP SENSOR
NG >> Repair or replace ground connections.
2.CHECK APP SENSOR 1 POWER SUPPLY CIRCUIT
1. Disconnect accelerator pedal position (APP)

Page 2234 of 3745

NISSAN LATIO 2010 Service Repair Manual DTC P2122, P2123 APP SENSOREC-969
< SERVICE INFORMATION > [MR18DE]
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2. Perform
EC-580, "Accelerator Pedal Released Position Learning".
3. Perform EC-580, "
Throttle Va

Page 2235 of 3745

NISSAN LATIO 2010 Service Repair Manual EC-970
< SERVICE INFORMATION >[MR18DE]
DTC P2127, P2128 APP SENSOR
DTC P2127, P2128 APP SENSOR
Component DescriptionINFOID:0000000005532862
The accelerator pedal position sensor is installed on the up

EC-970
< SERVICE INFORMATION >[MR18DE]
DTC P2127, P2128 APP SENSOR
DTC P2127, P2128 APP SENSOR
Component DescriptionINFOID:0000000005532862
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 potentiometers which transform the accelerator pedal
position into output voltage, and emit the voltage signal to the ECM.
In addition, these sensors detect the opening and closing speed of
the accelerator pedal and feed the voltage signals 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 oper-
ation such as fuel cut.
CONSULT-III Reference Value in Data Monitor ModeINFOID:0000000005532863
Specification data are reference values.
*: Accelerator pedal position sensor 2 signal is converted by ECM internally. Thus, it differs from ECM terminal voltage.
On Board Diagn
osis LogicINFOID:0000000005532864
These self-diagnoses have the one trip detection logic.
FA I L - S A F E M O D E
When the malfunction is detected, ECM enters fail-safe mode and the MIL lights up.
PBIB1741E
Monitor item Condition Specification
ACCEL SEN 1 • Ignition switch: ON
(Engine stopped) Accelerator pedal: Fully released
0.6 - 0.9 V
Accelerator pedal: Fully depressed 4.0 - 4.8 V
ACCEL SEN 2* • Ignition switch: ON
(Engine stopped) Accelerator pedal: Fully released
0.6 - 0.9 V
Accelerator pedal: Fully depressed 3.9 - 4.8 V
CLSD THL POS • Ignition switch: ON
(Engine stopped) Accelerator pedal:
Fully released ON
Accelerator pedal: Slightly depressed OFF
DTC No. Trouble diagnosis nameDTC detecting conditionPossible cause
P2127
2127 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.]
(EVAP control system pressure sensor
circuit is shorted.)
(Refrigerant pressure sensor circuit is
shorted.)
• EVAP control system pressure sensor
• Accelerator pedal position sensor (APP sensor 2)
• Crankshaft position sensor (POS)
• Refrigerant pressure sensor
P2128
2128
Accelerator pedal position
sensor 2 circuit high input An excessively high
voltage from the APP
sensor 2 is sent to ECM.
Engine operating condition in fail-safe mode
The ECM controls the electric throttle control actuator in regulating the throttle opening in order for the idle position to be within +10
degrees.
The ECM regulates the opening speed of the throttle valve to be slower than the normal condition.
So, the acceleration will be poor.
Revision: January 20102010 Versa

Page 2236 of 3745

NISSAN LATIO 2010 Service Repair Manual DTC P2127, P2128 APP SENSOREC-971
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DTC Confirmation ProcedureINFOID:0000000005532865
NOTE:
If DTC Confirmation Procedure has been previo

Page 2237 of 3745

NISSAN LATIO 2010 Service Repair Manual EC-972
< SERVICE INFORMATION >[MR18DE]
DTC P2127, P2128 APP SENSOR
Wiring Diagram
INFOID:0000000005532866
Specification data are reference values and are measured between each terminal and ground.
CAU

Page 2238 of 3745

NISSAN LATIO 2010 Service Repair Manual DTC P2127, P2128 APP SENSOREC-973
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Diagnosis ProcedureINFOID:0000000005532867
1.CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2.

Page 2239 of 3745

NISSAN LATIO 2010 Service Repair Manual EC-974
< SERVICE INFORMATION >[MR18DE]
DTC P2127, P2128 APP SENSOR
OK or NG
OK >> GO TO 2.
NG >> Repair or replace ground connections.
2.CHECK APP SENSOR 2 POWER SUPPLY CIRCUIT-I
1. Disconnect acceler

Page 2240 of 3745

NISSAN LATIO 2010 Service Repair Manual DTC P2127, P2128 APP SENSOREC-975
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• Refrigerant pressure sensor (Refer to
MTC-38.)
OK or NG
OK >> GO TO 10.
NG >> Replace malfunctio

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