Infiniti FX35, FX50 (S51). Manual - part 662

 

  Index      Infiniti     Infiniti FX35, FX50 (S51) - service repair manual 2010 year

 

Search            

 

 

 

 

 

 

 

 

 

Content   ..  660  661  662  663   ..

 

 

Infiniti FX35, FX50 (S51). Manual - part 662

 

 

P0122, P0123, P0227, P0228 TP SENSOR

EC-189

< DTC/CIRCUIT DIAGNOSIS >

[VQ35HR]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

P0122, P0123, P0227, P0228 TP SENSOR

Description

INFOID:0000000005236790

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 two sensors. These sensors are a
kind of potentiometer which transform the throttle valve position into
output voltage, and emit the voltage signal to the ECM. The ECM
judges the current opening angle of the throttle valve from these sig-
nals and controls the throttle valve opening angle in response to
driving conditions via the throttle control motor.

DTC Logic

INFOID:0000000005236791

DTC DETECTION LOGIC

NOTE:
If DTC P0122, P0123, P0227 or P0228 is displayed with DTC P0643, first perform the trouble diagnosis
for DTC P0643. Refer to 

EC-359, "DTC Logic"

.

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always perform the following procedure
before conducting the next test.
1.

Turn ignition switch OFF and wait at least 10 seconds.

2.

Turn ignition switch ON.

3.

Turn ignition switch OFF and wait at least 10 seconds.

TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 10 V at idle.

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Start engine and let it idle for 1 second.

2.

Check DTC.

Is DTC detected?

YES

>> Go to 

EC-190, "Diagnosis Procedure"

.

NO

>> INSPECTION END

PBIB0145E

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P0122

Throttle position (TP) 
sensor 2 (bank 1) circuit 
low input

An excessively low voltage from the TP sensor 
2 is sent to ECM.

• Harness or connectors

(TP sensor 2 circuit is open or shorted.)

• Electric throttle control actuator

(TP sensor 2)

P0123

Throttle position (TP) 
sensor 2 (bank 1) circuit 
high input

An excessively high voltage from the TP sensor 
2 is sent to ECM.

P0227

Throttle position (TP) 
sensor 2 (bank 2) circuit 
low input

An excessively low voltage from the TP sensor 
2 is sent to ECM.

P0228

Throttle position (TP) 
sensor 2 (bank 2) circuit 
high input

An excessively high voltage from the TP sensor 
2 is sent to ECM.

EC-190

< DTC/CIRCUIT DIAGNOSIS >

[VQ35HR]

P0122, P0123, P0227, P0228 TP SENSOR

Diagnosis Procedure

INFOID:0000000005236792

1.

CHECK GROUND CONNECTION

1.

Turn ignition switch OFF.

2.

Check ground connection M95. Refer to Ground Inspection in 

GI-39, "Circuit Inspection"

.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace ground connection.

2.

CHECK THROTTLE POSITION SENSOR 2 POWER SUPPLY CIRCUIT

1.

Disconnect electric throttle control actuator harness connector.

2.

Turn ignition switch ON.

3.

Check the voltage between electric throttle control actuator harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

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

3.

CHECK THROTTLE POSITION SENSOR 2 GROUND CIRCUIT FOR OPEN AND SHORT

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Check the continuity between electric throttle control actuator harness connector and ECM harness con-
nector.

4.

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

Is the inspection result normal?

YES

>> GO TO 4.

NO

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

4.

CHECK THROTTLE POSITION SENSOR 2 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1.

Check the continuity between electric throttle control actuator harness connector and ECM harness con-
nector.

2.

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

Is the inspection result normal?

YES

>> GO TO 5.

NO

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

5.

CHECK THROTTLE POSITION SENSOR

Refer to 

EC-191, "Component Inspection"

.

DTC

Electric throttle control actuator

Ground

Voltage (V)

Bank

Connector

Terminal

P0122, P0123

1

F6

6

Ground

Approx. 5

P0227, P0228

2

F27

1

DTC

Electric throttle control actuator

ECM

Continuity

Bank

Connector

Terminal

Connector

Terminal

P0122, P0123

1

F6

3

F101

40

Existed

P0227, P0228

2

F27

4

48

DTC

Electric throttle control actuator

ECM

Continuity

Bank

Connector

Terminal

Connector

Terminal

P0122, P0123

1

F6

5

F101

34

Existed

P0227, P0228

2

F27

3

35

P0122, P0123, P0227, P0228 TP SENSOR

EC-191

< DTC/CIRCUIT DIAGNOSIS >

[VQ35HR]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> GO TO 6.

6.

REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR

1.

Replace malfunctioning electric throttle control actuator.

2.

Go to 

EC-191, "Special Repair Requirement"

.

>> INSPECTION END

7.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-36, "Intermittent Incident"

.

>> INSPECTION END

Component Inspection

INFOID:0000000005236793

1.

CHECK THROTTLE POSITION (TP) SENSOR

1.

Turn ignition switch OFF.

2.

Reconnect all harness connectors disconnected.

3.

Perform 

EC-25, "THROTTLE VALVE CLOSED POSITION LEARNING : Special Repair Requirement"

.

4.

Turn ignition switch ON.

5.

Set selector lever position to D. 

6.

Check the voltage between ECM harness connector terminals under the following conditions.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> GO TO 2.

2.

REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR

1.

Replace malfunctioning electric throttle control actuator.

2.

Go to 

EC-191, "Special Repair Requirement"

.

>> INSPECTION END

Special Repair Requirement

INFOID:0000000005236794

1.

PERFORM THROTTLE VALVE CLOSED POSITION LEARNING

Refer to 

EC-25, "THROTTLE VALVE CLOSED POSITION LEARNING : Special Repair Requirement"

>> GO TO 2.

2.

PERFORM IDLE AIR VOLUME LEARNING

ECM

Condition

Voltage (V)

Connector

+

Terminal

Terminal

F101

30

[TP sensor 1 (bank 1)]

40

Accelerator pedal: Fully released

More than 0.36

Accelerator pedal: Fully depressed

Less than 4.75

31

[TP sensor 1 (bank 2)]

48

Accelerator pedal: Fully released

More than 0.36

Accelerator pedal: Fully depressed

Less than 4.75

34

[TP sensor 2 (bank 1)]

40

Accelerator pedal: Fully released

Less than 4.75

Accelerator pedal: Fully depressed

More than 0.36

35

[TP sensor 2 (bank 2)]

48

Accelerator pedal: Fully released

Less than 4.75

Accelerator pedal: Fully depressed

More than 0.36

EC-192

< DTC/CIRCUIT DIAGNOSIS >

[VQ35HR]

P0122, P0123, P0227, P0228 TP SENSOR

Refer to 

EC-25, "IDLE AIR VOLUME LEARNING : Special Repair Requirement"

>> END

 

 

 

 

 

 

 

Content   ..  660  661  662  663   ..