2006 INFINITI M35 Factory Service Manual

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Page 2905 of 5621

INFINITI M35 2006 Factory Service Manual EC-1362
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DTC P2122, P2123 APP SENSOR
Revision: 2006 January2006 M35/M45
2. CHECK APP SENSOR 1 POWER SUPPLY CIRCUIT
1. Disconnect accelerator pedal position (APP) sensor (1) harness
connector.

Page 2906 of 5621

INFINITI M35 2006 Factory Service Manual DTC P2122, P2123 APP SENSOR
EC-1363
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Revision: 2006 January2006 M35/M45
6. CHECK APP SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity betwee

Page 2907 of 5621

INFINITI M35 2006 Factory Service Manual EC-1364
[VK45DE]
DTC P2122, P2123 APP SENSOR
Revision: 2006 January2006 M35/M45
4. If NG, replace accelerator pedal assembly and go to next step.
5. Perform EC-806, "
Accelerator Pedal Released Po

Page 2908 of 5621

INFINITI M35 2006 Factory Service Manual DTC P2127, P2128 APP SENSOR
EC-1365
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Revision: 2006 January2006 M35/M45
DTC P2127, P2128 APP SENSORPFP:18002
Component DescriptionNBS005OP
The accelerator pedal po

DTC P2127, P2128 APP SENSOR
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Revision: 2006 January2006 M35/M45
DTC P2127, P2128 APP SENSORPFP:18002
Component DescriptionNBS005OP
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 ModeNBS005OQ
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 LogicNBS005OR
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
ACCEL SEN 2*
Ignition switch: ON
(Engine stopped)Accelerator pedal: Fully released 0.4 - 1.1V
Accelerator pedal: Fully depressed 3.7 - 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
2127Accelerator pedal posi-
tion sensor 2 circuit low
inputAn 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
2128Accelerator pedal posi-
tion sensor 2 circuit high
inputAn 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.

Page 2909 of 5621

INFINITI M35 2006 Factory Service Manual EC-1366
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DTC P2127, P2128 APP SENSOR
Revision: 2006 January2006 M35/M45
DTC Confirmation ProcedureNBS005OS
NOTE:
If DTC Confirmation Procedure has been previously conducted, always tu

Page 2910 of 5621

INFINITI M35 2006 Factory Service Manual DTC P2127, P2128 APP SENSOR
EC-1367
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Revision: 2006 January2006 M35/M45
Wiring DiagramNBS005OT
TBWT1056E

Page 2911 of 5621

INFINITI M35 2006 Factory Service Manual EC-1368
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DTC P2127, P2128 APP SENSOR
Revision: 2006 January2006 M35/M45
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM groun

Page 2912 of 5621

INFINITI M35 2006 Factory Service Manual DTC P2127, P2128 APP SENSOR
EC-1369
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Revision: 2006 January2006 M35/M45
2. CHECK APP SENSOR 2 POWER SUPPLY CIRCUIT-I
1. Disconnect accelerator pedal position (APP) se

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