Infiniti FX35 / FX45. Manual - part 588

DTC P2127, P2128 APP SENSOR

EC-1113

< SERVICE INFORMATION >

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1.

Disconnect accelerator pedal position (APP) sensor harness
connector.

2.

Turn ignition switch ON.

3.

Check voltage between APP sensor terminal 4 and ground with
CONSULT-III or tester.

OK or NG

OK

>> GO TO 8.

NG

>> GO TO 3.

3.

CHECK APP SENSOR 2 POWER SUPPLY CIRCUIT-II

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Check harness continuity between APP sensor terminal 4 and ECM terminal 91.
Refer to Wiring Diagram.

OK or NG

OK

>> GO TO 5.

NG

>> GO TO 4.

4.

DETECT MALFUNCTIONING PART

Check the following.
• Harness connectors E211, M41
• Harness for open or short between ECM and accelerator pedal position sensor

>> Repair open circuit.

5.

CHECK APP SENSOR 2 POWER SUPPLY CIRCUIT-III

Check harness for short to power and short to ground, between the following terminals.

OK or NG

OK

>> GO TO 6.

NG

>> Repair short to ground or short to power in harness or connectors.

6.

CHECK THROTTLE POSITION SENSOR

Refer to 

EC-788, "Component Inspection"

.

OK or NG

OK

>> GO TO 14.

PBIB1548E

Voltage: Approximately 5V

PBIB0915E

Continuity should exist.

ECM terminal

Sensor terminal

Reference Wiring Diagram

91

APP sensor terminal 4

EC-1111

47

Electric throttle control actuator terminal 6

EC-785

EC-1114

< SERVICE INFORMATION >

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DTC P2127, P2128 APP SENSOR

NG

>> GO TO 7.

7.

REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR

1.

Replace the electric throttle control actuator.

2.

Perform 

EC-663, "Throttle Valve Closed Position Learning"

.

3.

Perform 

EC-663, "Idle Air Volume Learning"

.

>> INSPECTION END

8.

CHECK APP SENSOR 2 GROUND CIRCUIT FOR OPEN AND SHORT

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Check harness continuity between APP sensor terminal 1 and ECM terminal 83.
Refer to Wiring Diagram.

4.

Also check harness for short to ground and short to power.

OK or NG

OK

>> GO TO 10.

NG

>> GO TO 9.

9.

DETECT MALFUNCTIONING PART

Check the following.
• Harness connectors E211, M41
• Harness for open or short between ECM and accelerator pedal position sensor

>> Repair open circuit or short to ground or short to power in harness or connectors.

10.

CHECK APP SENSOR 2 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1.

Check harness continuity between ECM terminal 98 and APP sensor terminal 2.
Refer to Wiring Diagram.

2.

Also check harness for short to ground and short to power.

OK or NG

OK

>> GO TO 12.

NG

>> GO TO 11.

11.

DETECT MALFUNCTIONING PART

Check the following.
• Harness connectors E211, M41
• Harness for open or short between ECM and accelerator pedal position sensor

>> Repair open circuit or short to ground or short to power in harness or connectors.

12.

CHECK APP SENSOR

Refer to 

EC-1128, "Component Inspection"

.

OK or NG

OK

>> GO TO 14.

NG

>> GO TO 13.

13.

REPLACE ACCELERATOR PEDAL ASSEMBLY

1.

Replace accelerator pedal assembly.

2.

Perform 

EC-662, "Accelerator Pedal Released Position Learning"

.

3.

Perform 

EC-663, "Throttle Valve Closed Position Learning"

.

4.

Perform 

EC-663, "Idle Air Volume Learning"

.

Continuity should exist.

Continuity should exist.

DTC P2127, P2128 APP SENSOR

EC-1115

< SERVICE INFORMATION >

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>> INSPECTION END

14.

CHECK INTERMITTENT INCIDENT

Refer to 

EC-717

.

>> INSPECTION END

Component Inspection

INFOID:0000000001327014

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-662, "Accelerator Pedal Released Position Learning"

.

6.

Perform 

EC-663, "Throttle Valve Closed Position Learning"

.

7.

Perform 

EC-663, "Idle Air Volume Learning"

.

Removal and Installation

INFOID:0000000001327015

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-1116

< SERVICE INFORMATION >

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DTC P2135 TP SENSOR

DTC P2135 TP SENSOR

Component Description

INFOID:0000000001327016

Electric throttle control actuator consists of throttle control motor,
throttle position sensor, etc. The throttle position sensor responds to
the throttle valve movement.
The throttle position sensor has the 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 addi-
tion, 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 sig-
nals and the ECM controls the throttle control motor to make the
throttle valve opening angle properly in response to driving condi-
tion.

CONSULT-III Reference Value in Data Monitor Mode

INFOID:0000000001327017

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:0000000001327018

This self-diagnosis has the one trip detection logic.

FAIL-SAFE MODE

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

DTC Confirmation Procedure

INFOID:0000000001327019

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-1118, "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.