Infiniti F50. Manual - part 470

 

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Infiniti F50. Manual - part 470

 

 

DTC P1225 TP SENSOR

EC-521

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EC

DTC P1225 TP SENSOR

PFP:16119

Component Description

EBS00MK4

Electric throttle control actuator consists of throttle control motor,
acceleration pedal position sensor, 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.

On Board Diagnosis Logic

EBS00MK5

The MIL will not light up for this diagnosis.

DTC Confirmation Procedure

EBS00MK6

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.

Turn ignition switch “OFF” and wait at least 10 seconds.

4.

Turn ignition switch “ON”.

5.

If 1st trip DTC is detected, go to 

EC-522, "Diagnostic Procedure"

.

 WITH GST

Follow the procedure “WITH CONSULT-II” above.

PBIB0145E

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P1225
1225

Closed throttle position learning 
performance problem

Closed throttle position learning value is 
excessively low.

Electric throttle control actuator
(TP sensor 1 and 2)

SEF058Y

EC-522

DTC P1225 TP SENSOR

Diagnostic Procedure

EBS00MK7

1. 

CHECK ELECTRIC THROTTLE CONTROL ACTUATOR VISUALLY

1.

Turn ignition switch “OFF”.

2.

Remove the intake air duct.

3.

Check if foreign matter is caught between the throttle valve and
the housing.

OK or NG

OK

>> GO TO 2.

NG

>> Remove the foreign matter and clean the electric throttle

control actuator inside.

2. 

REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR

1.

Replace the electric throttle control actuator.

2.

Perform 

EC-46, "Accelerator Pedal Released Position Learning"

 .

3.

Perform 

EC-46, "Throttle Valve Closed Position Learning"

 .

4.

Perform 

EC-46, "Idle Air Volume Learning"

 .

>> INSPECTION END

Removal and Installation

EBS00MK8

ELECTRIC THROTTLE CONTROL ACTUATOR

Refer to 

EM-17, "INTAKE MANIFOLD"

 .

PBIB0083E

DTC P1226 TP SENSOR

EC-523

C

D

E

F

G

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L

M

A

EC

DTC P1226 TP SENSOR

PFP:16119

Component Description

EBS00MK9

Electric throttle control actuator consists of throttle control motor,
acceleration pedal position sensor, 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.

On Board Diagnosis Logic

EBS00MKA

The MIL will not light up for this diagnosis.

DTC Confirmation Procedure

EBS00MKB

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.

Turn ignition switch “OFF” and wait at least 10 seconds.

4.

Turn ignition switch “ON”.

5.

Repeat steps 3 and 4 for 32 times.

6.

If 1st trip DTC is detected, go to 

EC-524, "Diagnostic Procedure"

.

 WITH GST

Follow the procedure “WITH CONSULT-II” above.

PBIB0145E

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P1226
1226

Closed throttle position 
learning performance 
problem

Closed throttle position learning is not performed 
successfully, repeatedly.

Electric throttle control actuator
(TP sensor 1 and 2)

SEF058Y

EC-524

DTC P1226 TP SENSOR

Diagnostic Procedure

EBS00MKC

1. 

CHECK ELECTRIC THROTTLE CONTROL ACTUATOR VISUALLY

1.

Turn ignition switch “OFF”.

2.

Remove the intake air duct.

3.

Check if foreign matter is caught between the throttle valve and
the housing.

OK or NG

OK

>> GO TO 2.

NG

>> Remove the foreign matter and clean the electric throttle

control actuator inside.

2. 

REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR

1.

Replace the electric throttle control actuator.

2.

Perform 

EC-46, "Accelerator Pedal Released Position Learning"

 .

3.

Perform 

EC-46, "Throttle Valve Closed Position Learning"

 .

4.

Perform 

EC-46, "Idle Air Volume Learning"

 .

>> INSPECTION END

Removal and Installation

EBS00MKD

ELECTRIC THROTTLE CONTROL ACTUATOR

Refer to 

EM-17, "INTAKE MANIFOLD"

 .

PBIB0083E

 

 

 

 

 

 

 

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