Infiniti M35/M45 Y50. Manual — part 511
DTC P1220 FUEL PUMP CONTROL MODULE (FPCM)
EC-517
[VQ35DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
12.
CHECK INTERMITTENT INCIDENT
Refer to
EC-153, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"
>> INSPECTION END
Component Inspection
NBS0053G
FUEL PUMP CONTROL MODULE
1.
Start engine and warm it up to normal operating temperature.
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.
: Vehicle front
1.
FPCM
2.
Dropping resistor
Condition
Voltage
When engine cranking
Approx. 0V
After starting engine
Approx. 5V
PBIB2708E
PBIB0101E
EC-518
[VQ35DE]
DTC P1225 TP SENSOR
DTC P1225 TP SENSOR
PFP:16119
Component Description
NBS0053H
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 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
NBS0053I
The MIL will not light up for this diagnosis.
DTC Confirmation Procedure
NBS0053J
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, wait at least 10 seconds.
4.
Turn ignition switch ON.
5.
If 1st trip DTC is detected, go to
EC-519, "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
Closed throttle position learning value is exces-
sively low.
●
Electric throttle control actuator
(TP sensor 1 and 2)
SEF058Y
DTC P1225 TP SENSOR
EC-519
[VQ35DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
Diagnostic Procedure
NBS0053K
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-86, "Throttle Valve Closed Position Learning"
3.
Perform
EC-86, "Idle Air Volume Learning"
>> INSPECTION END
Removal and Installation
NBS0053L
ELECTRIC THROTTLE CONTROL ACTUATOR
Refer to
EM-21, "INTAKE MANIFOLD COLLECTOR"
PBIB1556E
EC-520
[VQ35DE]
DTC P1226 TP SENSOR
DTC P1226 TP SENSOR
PFP:16119
Component Description
NBS0053M
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 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
NBS0053N
The MIL will not light up for this diagnosis.
DTC Confirmation Procedure
NBS0053O
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, 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-521, "Removal and Installa-
.
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
Closed throttle position learning is not per-
formed successfully, repeatedly.
●
Electric throttle control actuator
(TP sensor 1 and 2)
SEF058Y
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