Infiniti FX35 / FX45. Manual - part 440

 

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Infiniti FX35 / FX45. Manual - part 440

 

 

DTC P2135 TP SENSOR

EC-521

< SERVICE INFORMATION >

[VQ35DE]

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1.

Disconnect electric throttle control actuator harness connector.

2.

Turn ignition switch ON.

3.

Check voltage between electric throttle control actuator terminal
1 and ground with CONSULT-III or tester.

OK or NG

OK

>> GO TO 7.

NG

>> GO TO 3.

3.

CHECK THROTTLE POSITION SENSOR POWER SUPPLY CIRCUIT-II

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Check harness continuity between electric throttle control actuator terminal 1 and ECM terminal 47.
Refer to Wiring Diagram.

OK or NG

OK

>> GO TO 4.

NG

>> Repair open circuit.

4.

CHECK THROTTLE POSITION SENSOR POWER SUPPLY CIRCUIT-III

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

OK or NG

OK

>> GO TO 5.

NG

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

5.

CHECK APP SENSOR

Refer to 

EC-517, "Component Inspection"

.

OK or NG

OK

>> GO TO 11.

NG

>> GO TO 6.

6.

REPLACE ACCELERATOR PEDAL ASSEMBLY

1.

Replace accelerator pedal assembly.

2.

Perform 

EC-85, "Accelerator Pedal Released Position Learning"

.

3.

Perform 

EC-85, "Throttle Valve Closed Position Learning"

.

4.

Perform 

EC-85, "Idle Air Volume Learning"

.

PBIB1557E

Voltage: Approximately 5V

PBIB0082E

Continuity should exist.

ECM terminal

Sensor terminal

Reference Wiring Diagram

47

Electric throttle control actuator terminal 1

EC-519

91

APP sensor terminal 4

EC-513

EC-522

< SERVICE INFORMATION >

[VQ35DE]

DTC P2135 TP SENSOR

>> INSPECTION END

7.

CHECK THROTTLE POSITION SENSOR GROUND CIRCUIT FOR OPEN AND SHORT

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Check harness continuity between electric throttle control actuator terminal 5 and ECM terminal 66.
Refer to Wiring Diagram.

4.

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

OK or NG

OK

>> GO TO 8.

NG

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

8.

CHECK THROTTLE POSITION SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1.

Check harness continuity between the following;
ECM terminal 50 and electric throttle control actuator terminal 4,
ECM terminal 69 and electric throttle control actuator terminal 2.
Refer to Wiring Diagram.

2.

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

OK or NG

OK

>> GO TO 9.

NG

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

9.

CHECK THROTTLE POSITION SENSOR

Refer to 

EC-522, "Component Inspection"

.

OK or NG

OK

>> GO TO 11.

NG

>> GO TO 10.

10.

REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR

1.

Replace the electric throttle control actuator.

2.

Perform 

EC-85, "Throttle Valve Closed Position Learning"

.

3.

Perform 

EC-85, "Idle Air Volume Learning"

.

>> INSPECTION END

11.

CHECK INTERMITTENT INCIDENT

Refer to 

EC-139

.

>> INSPECTION END

Component Inspection

INFOID:0000000001326409

THROTTLE POSITION SENSOR

1.

Reconnect all harness connectors disconnected.

2.

Perform 

EC-85, "Throttle Valve Closed Position Learning"

.

3.

Turn ignition switch ON.

4.

Set selector lever to D. 

Continuity should exist.

Continuity should exist.

DTC P2135 TP SENSOR

EC-523

< SERVICE INFORMATION >

[VQ35DE]

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5.

Check voltage between ECM terminals 50 (TP sensor 1signal),
69 (TP sensor 2signal) and ground under the following condi-
tions.

6.

If NG, replace electric throttle control actuator and go to the next
step.

7.

Perform 

EC-85, "Throttle Valve Closed Position Learning"

.

8.

Perform 

EC-85, "Idle Air Volume Learning"

.

Removal and Installation

INFOID:0000000001326410

ELECTRIC THROTTLE CONTROL ACTUATOR

Refer to 

EM-19

.

Terminal

Accelerator pedal

Voltage

50
(Throttle position sensor 1)

Fully released

More than 0.36V

Fully depressed

Less than 4.75V

69
 (Throttle position sensor 2)

Fully released

Less than 4.75V

Fully depressed

More than 0.36V

PBIB1608E

EC-524

< SERVICE INFORMATION >

[VQ35DE]

DTC P2138 APP SENSOR

DTC P2138 APP SENSOR

Component Description

INFOID:0000000001326411

The accelerator pedal position (APP) sensor is installed on the upper
end of the accelerator pedal assembly. The sensor detects the
accelerator 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-III Reference Value in Data Monitor Mode

INFOID:0000000001326412

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 Logic

INFOID:0000000001326413

This self-diagnosis has the one trip detection logic.
NOTE:
If DTC P2138 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643.
Refer to 

EC-424

.

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

P2138
2138

Accelerator pedal posi-
tion sensor circuit range/
performance

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

• Harness or connector

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

• Accelerator pedal position sensor

(APP sensor 1 and 2)

• Electric throttle control actuator

(TP sensor 1 and 2)

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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