Infiniti FX35, FX50 (S51). Manual — part 865
P1220 FUEL PUMP CONTROL MODULE (FPCM)
EC-1001
< DTC/CIRCUIT DIAGNOSIS >
[VK50VE]
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7.
CHECK FUEL PUMP CONTROL CIRCUIT FOR OPEN AND SHORT
1.
Disconnect “fuel level sensor unit and fuel pump (main)” harness connector.
2.
Check the continuity between FPCM harness connector and “fuel level sensor unit and fuel pump (main)”
harness connector.
3.
Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
>> GO TO 8.
NO
>> Repair open circuit, short to ground or short to power in harness or connectors.
8.
CHECK FPCM
EC-1001, "Component Inspection"
.
Is the inspection result normal?
YES
>> GO TO 9.
NO
>> Replace FPCM.
9.
CHECK INTERMITTENT INCIDENT
GI-36, "Intermittent Incident"
.
>> INSPECTION END
Component Inspection
INFOID:0000000005237481
1.
CHECK FUEL PUMP CONTROL MODULE (FPCM)
1.
Check the voltage between FPCM terminals under the following conditions.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace FPCM.
FPCM
Fuel level sensor unit and fuel pump (main)
Continuity
Connector
Terminal
Connector
Terminal
B31
6
B22
3
Existed
7
1
FPCM
Condition
Voltage
Connector
+
−
Terminal
Terminal
B31
7
6
For 1 second after turning ignition
switch ON
Approx. 8.5 V
More than 1 second after turning
ignition switch ON
Approx. 0 V
Idle speed
Approx. 8.5 V
EC-1002
< DTC/CIRCUIT DIAGNOSIS >
[VK50VE]
P1225, P1234 TP SENSOR
P1225, P1234 TP SENSOR
Description
INFOID:0000000005237482
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:0000000005237483
DTC DETECTION 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.
Turn ignition switch ON.
2.
Turn ignition switch OFF and wait at least 10 seconds.
3.
Turn ignition switch ON.
4.
Check 1st trip DTC.
Is 1st trip DTC detected?
YES
>> Go to
EC-1002, "Diagnosis Procedure"
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000005237484
1.
CHECK ELECTRIC THROTTLE CONTROL ACTUATOR VISUALLY
1.
Turn ignition switch OFF.
2.
Remove the intake air duct.
PBIB0145E
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P1225
Closed throttle position learning
performance (bank 1)
Closed throttle position learning value is
excessively low.
• Electric throttle control actuator
(TP sensor 1 and 2)
P1234
Closed throttle position learning
performance (bank 2)
P1225, P1234 TP SENSOR
EC-1003
< DTC/CIRCUIT DIAGNOSIS >
[VK50VE]
C
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3.
Check that no foreign matter is caught between the throttle valve
(1) and the housing.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Remove the foreign matter and clean the electric throttle
control actuator inside.
2.
REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR
1.
Replace malfunctioning electric throttle control actuator.
2.
EC-1003, "Special Repair Requirement"
.
>> INSPECTION END
Special Repair Requirement
INFOID:0000000005237485
1.
PERFORM THROTTLE VALVE CLOSED POSITION LEARNING
EC-581, "THROTTLE VALVE CLOSED POSITION LEARNING : Special Repair Requirement"
>> GO TO 2.
2.
PERFORM IDLE AIR VOLUME LEARNING
EC-582, "IDLE AIR VOLUME LEARNING : Special Repair Requirement"
>> END
JMBIA1556ZZ
EC-1004
< DTC/CIRCUIT DIAGNOSIS >
[VK50VE]
P1226, P1235 TP SENSOR
P1226, P1235 TP SENSOR
Description
INFOID:0000000005237486
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:0000000005237487
DTC DETECTION 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.
Turn ignition switch ON.
2.
Turn ignition switch OFF and wait at least 10 seconds.
3.
Turn ignition switch ON.
4.
Repeat steps 2 and 3 for 32 times.
5.
Check 1st trip DTC.
Is 1st trip DTC detected?
YES
>> Go to
EC-1004, "Diagnosis Procedure"
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000005237488
1.
CHECK ELECTRIC THROTTLE CONTROL ACTUATOR VISUALLY
1.
Turn ignition switch OFF.
2.
Remove the intake air duct.
PBIB0145E
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P1226
Closed throttle position learning
performance (bank 1)
Closed throttle position learning is not
performed successfully, repeatedly.
• Electric throttle control actuator
(TP sensor 1 and 2)
P1235
Closed throttle position learning
performance (bank 2)
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