Infiniti M35/M45 Y50. Manual — part 509
DTC P1217 ENGINE OVER TEMPERATURE
EC-509
[VQ35DE]
C
D
E
F
G
H
I
J
K
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M
A
EC
Component Inspection
NBS00539
COOLING FAN MOTORS -1 AND -2
1.
Disconnect cooling fan control module harness connectors.
2.
Supply cooling fan control module terminals with battery voltage
and check operation.
Make sure that cooling fan operates.
If NG, replace cooling fan motor.
COOLING FAN RELAY
1.
Disconnect cooling fan relay harness connector.
2.
Check continuity between terminals 3 and 5 under the following
conditions.
If NG, replace cooling fan relay.
Cooling fan motor
Terminals
(+)
(
−
)
1
4
5
2
6
7
PBID0262J
Conditions
Continuity
12V direct current supply
between terminals 1 and 2
Yes
No current supply
No
SEF090M
EC-510
[VQ35DE]
DTC P1220 FUEL PUMP CONTROL MODULE (FPCM)
DTC P1220 FUEL PUMP CONTROL MODULE (FPCM)
PFP:17001
Description
NBS0053A
SYSTEM DESCRIPTION
*: ECM determines the start signal status by the signals of engine speed and battery voltage.
This system controls the fuel pump operation. The amount of fuel flow delivered from the fuel pump is altered
between two flow rates by the FPCM operation. The FPCM determines the voltage supplied to the fuel pump
(and therefore fuel flow) according to the following conditions.
COMPONENT DESCRIPTION
The FPCM adjusts the voltage supplied to the fuel pump to control
the amount of fuel flow. When the FPCM increases the voltage sup-
plied to the fuel pump, the fuel flow is increased. When the FPCM
decreases the voltage, the fuel flow is decreased.
CONSULT-II Reference Value in Data Monitor Mode
NBS0053B
Specification data are reference values.
On Board Diagnosis Logic
NBS0053C
Sensor
Input Signal to ECM
ECM function
Actuator
Crankshaft position sensor (POS)
Camshaft position sensor (PHASE)
Engine speed*
Fuel pump control
Fuel pump control module
(FPCM)
Mass air flow sensor
Amount of intake air
Engine coolant temperature sensor
Engine coolant temperature
Battery
Battery voltage*
Conditions
Amount of fuel flow
Supplied voltage
●
Engine cranking
●
Engine coolant temperature is below 10
°
C (50
°
F).
●
Engine is running under heavy load and high speed conditions
high
Battery voltage
(11 - 14V)
Except the above
low
Approximately 8V
SEF387X
MONITOR ITEM
CONDITION
SPECIFICATION
FPCM
●
Engine: Cranking
HI
●
Engine: Idle
●
Engine coolant temperature: More than 10
°
C (50
°
F)
LOW
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P1220
1220
Fuel pump control module
(FPCM)
An improper voltage signal from the FPCM, which
is supplied to a point between the fuel pump and
the dropping resistor, is detected by ECM.
●
Harness or connectors
(FPCM circuit is shorted.)
●
Dropping resistor
●
FPCM
DTC P1220 FUEL PUMP CONTROL MODULE (FPCM)
EC-511
[VQ35DE]
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A
EC
DTC Confirmation Procedure
NBS0053D
CAUTION:
Always drive vehicle at a safe speed.
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 11V with ignition
switch ON.
WITH CONSULT-II
1.
Turn ignition switch ON and select “DATA MONITOR” mode with
CONSULT-II.
2.
Make sure that “COOLAN TEMP/S” indicates less than 70
°
C
(158
°
F). If not, cool down the engine.
3.
Start engine.
4.
Hold vehicle at the following conditions for 12 seconds.
5.
If 1st trip DTC is detected, go to
EC-513, "Diagnostic Procedure"
WITH GST
Follow the procedure WITH CONSULT-II above.
ENG SPEED
1,550 - 3,250 rpm (AWD models)
1,450 - 3,100 rpm (2WD models)
VHCL SPEED SE
70 - 120 km/h (43 - 75 MPH)
B/FUEL SCHDL
Less than 31.8 msec
Selector lever
Suitable position
SEF189Y
EC-512
[VQ35DE]
DTC P1220 FUEL PUMP CONTROL MODULE (FPCM)
Wiring Diagram
NBS0053E
TBWT1534E
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