Infiniti Q45. Manual - part 505

DTC P2127, P2128 APP SENSOR

EC-659

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6. 

CHECK THROTTLE POSITION SENSOR

Refer to 

EC-667, "Component Inspection"

 .

OK or NG

OK

>> GO TO 14.

NG

>> GO TO 7.

7. 

REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR

1.

Replace the electric throttle control actuator.

2.

Perform 

EC-78, "Throttle Valve Closed Position Learning"

 .

3.

Perform 

EC-78, "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 M135, F105

●

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 M135, F105

●

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.

Continuity should exist.

Continuity should exist.

EC-660

DTC P2127, P2128 APP SENSOR

12. 

CHECK APP SENSOR

Refer to 

EC-660, "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-77, "Accelerator Pedal Released Position Learning"

 .

3.

Perform 

EC-78, "Throttle Valve Closed Position Learning"

 .

4.

Perform 

EC-78, "Idle Air Volume Learning"

 .

>> INSPECTION END

14. 

CHECK INTERMITTENT INCIDENT

Refer to 

EC-145, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

 .

>> INSPECTION END

Component Inspection

NBS0026B

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-77, "Accelerator Pedal Released Position Learning"

 .

6.

Perform 

EC-78, "Throttle Valve Closed Position Learning"

 .

7.

Perform 

EC-78, "Idle Air Volume Learning"

 .

Removal and Installation

NBS0026C

ACCELERATOR PEDAL

Refer to 

ACC-3, "ACCELERATOR CONTROL SYSTEM"

 .

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

DTC P2135 TP SENSOR

EC-661

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DTC P2135 TP SENSOR

PFP:16119

Component Description

NBS0026D

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-II Reference Value in Data Monitor Mode

NBS0026E

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

NBS0026F

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.

PBIB0145E

MONITOR ITEM

CONDITION

SPECIFICATION

THRTL SEN 1
THRTL SEN 2*

●

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
(The 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. 

EC-662

DTC P2135 TP SENSOR

DTC Confirmation Procedure

NBS0026G

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 10V at idle.

 WITH CONSULT-II

1.

Turn ignition switch ON.

2.

Select “DATA MONITOR” mode with CONSULT-II.

3.

Start engine and let it idle for 1 second.

4.

If DTC is detected, go to 

EC-664, "Diagnostic Procedure"

 .

 WITH GST

Follow the procedure “WITH CONSULT-II” above.

SEF058Y