Infiniti M45 (Y34). Manual — part 460

DTC P1226 TP SENSOR

EC-529

C

D

E

F

G

H

I

J

K

L

M

A

EC

DTC P1226 TP SENSOR

PFP:16119

Component Description

ABS002Q4

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

ABS002Q5

The MIL will not light up for this diagnosis.

DTC Confirmation Procedure

ABS002Q6

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-530, "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-530

DTC P1226 TP SENSOR

Diagnostic Procedure

ABS002Q7

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-44, "Accelerator Pedal Released Position Learning"

.

3.

Perform

EC-44, "Throttle Valve Closed Position Learning"

.

4.

Perform

EC-44, "Idle Air Volume Learning"

.

>> INSPECTION END

Removal and Installation

ABS002Q8

ELECTRIC THROTTLE CONTROL ACTUATOR

Refer to

EM-18, "INTAKE MANIFOLD"

.

PBIB0083E

DTC P1229 SENSOR POWER SUPPLY

EC-531

C

D

E

F

G

H

I

J

K

L

M

A

EC

DTC P1229 SENSOR POWER SUPPLY

PFP:16119

On Board Diagnosis Logic

ABS002Q9

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

ABS002QA

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-533, "Diagnostic Procedure"

.

WITH GST

Follow the procedure WITH CONSULT-II above.

DTC No.

Trouble diagnosis

name

DTC detecting condition

Possible cause

P1229
1229

Sensor power supply
circuit short

ECM detects a voltage of power source for
sensor is excessively low or high.

●

Harness or connectors
(The TP sensor 1 and 2 circuit is shorted.)
(APP sensor 1 circuit is shorted.)
(MAF sensor circuit is shorted.)
(EVAP control system pressure sensor circuit
is shorted.)
(Power steering pressure sensor circuit is
shorted.)
(Refrigerant pressure sensor circuit is
shorted.)

●

Electric throttle control actuator
(TP sensor 1 and 2)

●

Accelerator pedal position sensor
(APP sensor 1)

●

MAF sensor

●

EVAP control system pressure sensor

●

Power steering pressures sensor

●

Refrigerant pressures sensor

Engine operation condition in fail-safe mode

ECM stops the electric throttle control actuator control, throttle valve is maintained at a fixed opening (approx. 5 degrees) by the return
spring.

SEF058Y

EC-532

DTC P1229 SENSOR POWER SUPPLY

Wiring Diagram

ABS002QB

TBWA0301E