2006 INFINITI FX35 Service Manual

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Page 2641 of 4462

INFINITI FX35 2006 Service Manual DTC P2122, P2123 APP SENSOR EC-1257
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Revision: 2006 December 2006 FX35/FX45
Specification data are reference values and are measured between each termina

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INFINITI FX35 2006 Service Manual EC-1258
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DTC P2122, P2123 APP SENSOR
Revision: 2006 December 2006 FX35/FX45
2. CHECK APP SENSOR 1 POWER SUPPLY CIRCUIT
1. Disconnect accelerator pedal position (APP) sensor harness connector

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INFINITI FX35 2006 Service Manual DTC P2122, P2123 APP SENSOR EC-1259
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Revision: 2006 December 2006 FX35/FX45
6. CHECK APP SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness

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INFINITI FX35 2006 Service Manual EC-1260
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DTC P2122, P2123 APP SENSOR
Revision: 2006 December 2006 FX35/FX45
4. If NG, replace accelerator pedal assembly and go to next step.
5. Perform EC-743, "
Accelerator Pedal Released

Page 2645 of 4462

INFINITI FX35 2006 Service Manual DTC P2127, P2128 APP SENSOR EC-1261
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Revision: 2006 December 2006 FX35/FX45
DTC P2127, P2128 APP SENSORPFP:18002
Component DescriptionNBS004FZ
The accele

DTC P2127, P2128 APP SENSOR EC-1261
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Revision: 2006 December 2006 FX35/FX45
DTC P2127, P2128 APP SENSORPFP:18002
Component DescriptionNBS004FZ
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-II Reference Value in Data Monitor ModeNBS004G0
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 Diagnosis LogicNBS004G1
These self-diagnoses have the one trip detection logic.
FAIL-SAFE MODE
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 0.5 - 1.0V
Accelerator pedal: Fully depressed 4.0 - 4.8V
ACCEL SEN 2*
Ignition switch: ON
(Engine stopped) Accelerator pedal: Fully released 0.3 - 1.2V
Accelerator pedal: Fully depressed 3.9 - 4.8V
CLSD THL POS
Ignition switch: ON
(Engine stopped) Accelerator pedal: Fully released ON
Accelerator pedal: Slightly depressed OFF
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P2127
2127 Accelerator pedal posi-
tion sensor 2 circuit low
input An excessively low voltage from the APP sen-
sor 2 is sent to ECM.
Harness or connectors
(APP sensor 2 circuit is open or
shorted.)
(TP sensor circuit is shorted.)
Accelerator pedal position sensor
(APP sensor 2)
Electric throttle control actuator
(TP sensor 1 and 2)
P2128
2128 Accelerator pedal posi-
tion sensor 2 circuit high
input An excessively high voltage from the APP sen-
sor 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.

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INFINITI FX35 2006 Service Manual EC-1262
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DTC P2127, P2128 APP SENSOR
Revision: 2006 December 2006 FX35/FX45
DTC Confirmation ProcedureNBS004G2
NOTE:
If DTC Confirmation Procedure has been previously conducted, always turn i

Page 2647 of 4462

INFINITI FX35 2006 Service Manual DTC P2127, P2128 APP SENSOR EC-1263
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Revision: 2006 December 2006 FX35/FX45
Wiring DiagramNBS004G3
TBWM1355E

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INFINITI FX35 2006 Service Manual EC-1264
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DTC P2127, P2128 APP SENSOR
Revision: 2006 December 2006 FX35/FX45
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM

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