Infiniti M45 (Y34). Manual - part 459

DTC P1220 FUEL PUMP CONTROL MODULE (FPCM)

EC-525

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8. 

DETECT MALFUNCTIONING PART

Check the following.

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Harness connectors F105, M135

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Harness connectors M141, B211

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Harness for open or short between ECM and FPCM

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

9. 

CHECK FPCM OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1.

Check harness continuity between ECM terminal 25 and FPCM terminal 1.
Refer to Wiring Diagram.

2.

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

OK or NG

OK

>> GO TO 11.

NG

>> GO TO 10.

10. 

DETECT MALFUNCTIONING PART

Check the following.

●

Harness connectors F105, M135

●

Harness connectors M141, B211

●

Harness for open or short between ECM and FPCM

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

11. 

CHECK FPCM

Refer to 

EC-525, "Component Inspection"

 .

OK or NG

OK

>> GO TO 12.

NG

>> Replace FPCM.

12. 

CHECK INTERMITTENT INCIDENT

Refer to 

EC-132, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

 .

>> INSPECTION END

Component Inspection

ABS002PY

FUEL PUMP CONTROL MODULE

1.

Start engine and warm it up to normal operating temperature.

Continuity should exist.

PBIB1129E

EC-526

DTC P1220 FUEL PUMP CONTROL MODULE (FPCM)

2.

Turn ignition switch OFF and wait at least 10 seconds.

3.

Check voltage between FPCM terminal 4 and ground under the
following conditions.

4.

If NG, replace fuel pump control module.

Condition

Voltage

When engine cranking

Approx. 0V

After starting engine

Approx. 5V

PBIB0101E

DTC P1225 TP SENSOR

EC-527

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DTC P1225 TP SENSOR

PFP:16119

Component Description

ABS002PZ

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

ABS002Q0

The MIL will not light up for this diagnosis.

DTC Confirmation Procedure

ABS002Q1

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-528, "Diagnostic Procedure"

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 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.

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Electric throttle control actuator
(TP sensor 1 and 2)

SEF058Y

EC-528

DTC P1225 TP SENSOR

Diagnostic Procedure

ABS002Q2

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"

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3.

Perform 

EC-44, "Throttle Valve Closed Position Learning"

 .

4.

Perform 

EC-44, "Idle Air Volume Learning"

 .

>> INSPECTION END

Removal and Installation

ABS002Q3

ELECTRIC THROTTLE CONTROL ACTUATOR

Refer to 

EM-18, "INTAKE MANIFOLD"

 .

PBIB0083E