Infiniti FX35 / FX45. Manual - part 439

DTC P2127, P2128 APP SENSOR

EC-517

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4.

Perform 

EC-85, "Idle Air Volume Learning"

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>> INSPECTION END

14.

CHECK INTERMITTENT INCIDENT

Refer to 

EC-139

.

>> INSPECTION END

Component Inspection

INFOID:0000000001326401

ACCELERATOR PEDAL POSITION SENSOR

1.

Reconnect all harness connectors disconnected.

2.

Turn ignition switch ON.

3.

Check voltage between ECM terminals 106 (APP sensor 1 sig-
nal), 98 (APP sensor 2 signal) and ground under the following
conditions.

4.

If NG, replace accelerator pedal assembly and go to next step.

5.

Perform 

EC-85, "Accelerator Pedal Released Position Learning"

.

6.

Perform 

EC-85, "Throttle Valve Closed Position Learning"

.

7.

Perform 

EC-85, "Idle Air Volume Learning"

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Removal and Installation

INFOID:0000000001326402

ACCELERATOR PEDAL

Refer to 

ACC-3

.

Terminal

Accelerator pedal

Voltage

106
 (Accelerator pedal position 
sensor 1)

Fully released

0.5 - 1.0V

Fully depressed

3.9 - 4.7V

98
(Accelerator pedal position 
sensor 2)

Fully released

0.15 - 0.60V

Fully depressed

1.95 - 2.40V

MBIB0023E

EC-518

< SERVICE INFORMATION >

[VQ35DE]

DTC P2135 TP SENSOR

DTC P2135 TP SENSOR

Component Description

INFOID:0000000001326403

Electric throttle control actuator consists of throttle control motor,
throttle position (TP) sensor, etc. The throttle position sensor
responds to the throttle valve movement.
The throttle position sensor has two sensors. These sensors are a
kind of potentiometers which transform the throttle valve position into
output voltage, and emit the voltage signal to the ECM. In addition,
these sensors detect the opening and closing speed of the throttle
valve and feed the voltage signals to the ECM. The ECM judges the
current opening angle of the throttle valve from these signals and the
ECM controls the throttle control motor to make the throttle valve
opening angle properly in response to driving condition.

CONSULT-III Reference Value in Data Monitor Mode

INFOID:0000000001326404

Specification data are reference values.

*: Throttle position sensor 2 signal is converted by ECM internally. Thus, it differs from ECM terminal voltage signal.

On Board Diagnosis Logic

INFOID:0000000001326405

This self-diagnosis has the one trip detection logic.

FAIL-SAFE MODE

When the malfunction is detected, the ECM enters fail-safe mode and the MIL lights up.

DTC Confirmation Procedure

INFOID:0000000001326406

NOTE:
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 8V at idle.

1.

Start engine and let it idle for 1 second.

2.

Check DTC.

3.

If DTC is detected, go to 

EC-520, "Diagnosis Procedure"

.

PBIB0145E

MONITOR ITEM

CONDITION

SPECIFICATION

TP SEN 1-B1
TP SEN 2-B1*

• Ignition switch: ON

(Engine stopped)

• Selector lever: D

Accelerator pedal: Fully released

More than 0.36V

Accelerator pedal: Fully depressed

Less than 4.75V

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P2135
2135

Throttle position sensor 
circuit range/perfor-
mance

Rationally incorrect voltage is sent to ECM 
compared with the signals from TP sensor 1 
and TP sensor 2.

• Harness or connector

(TP sensor 1 and 2 circuit is open or 
shorted.)
(APP sensor 2 circuit is shorted).

• Electric throttle control actuator

(TP sensor 1 and 2)

• Accelerator pedal position sensor.

(APP sensor 2)

Engine operation 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. 

DTC P2135 TP SENSOR

EC-519

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Wiring Diagram

INFOID:0000000001326407

Specification data are reference values and are measured between each terminal and ground.

CAUTION:

Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.

TBWM0406E

EC-520

< SERVICE INFORMATION >

[VQ35DE]

DTC P2135 TP SENSOR

Diagnosis Procedure

INFOID:0000000001326408

1.

CHECK GROUND CONNECTIONS

1.

Turn ignition switch OFF.

2.

Loosen and retighten ground screw on the body.
Refer to 

EC-144, "Ground Inspection"

.

OK or NG

OK

>> GO TO 2.

NG

>> Repair or replace ground connections.

2.

CHECK THROTTLE POSITION SENSOR POWER SUPPLY CIRCUIT-1

TER-

MI-

NAL 

NO.

WIRE 

COLOR

ITEM

CONDITION

DATA (DC Voltage)

47

L

Sensor power supply (Throt-
tle position sensor)

[Ignition switch: ON]

Approximately 5V

50

W

Throttle position sensor 1

[Ignition switch: ON]
• Engine stopped
• Selector lever: D
• Accelerator pedal: Fully released

More than 0.36V

[Ignition switch: ON]
• Engine stopped
• Selector lever: D
• Accelerator pedal: Fully depressed

Less than 4.75V

66

B

Sensor ground
(Throttle position sensor)

[Engine is running]
• Warm-up condition
• Idle speed

Approximately 0V

69

R

Throttle position sensor 2

[Ignition switch: ON]
• Engine stopped
• Selector lever: D
• Accelerator pedal: Fully released

Less than 4.75V

[Ignition switch: ON]
• Engine stopped
• Selector lever: D
• Accelerator pedal: Fully depressed

More than 0.36V

91

G

Sensor power supply
(APP sensor 2)

[Ignition switch: ON]

Approximately 5V

PBIB2625E