Infiniti M45 (Y34). Manual — part 457
DTC P1217 ENGINE OVER TEMPERATURE
EC-517
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EC
13.
CHECK THERMOSTAT
1.
Remove thermostat.
2.
Check valve seating condition at normal room temperatures.
It should seat tightly.
3.
Check valve opening temperature and valve lift.
4.
Check if valve is closed at 5
°
C (9
°
F) below valve opening tem-
perature. For details, refer to
.
OK or NG
OK
>> GO TO 14.
NG
>> Replace thermostat.
14.
CHECK ENGINE COOLANT TEMPERATURE SENSOR
Refer to
EC-197, "Component Inspection"
OK or NG
OK
>> GO TO 15.
NG
>> Replace engine coolant temperature sensor.
15.
CHECK MAIN 12 CAUSES
If the cause cannot be isolated, go to
EC-517, "Main 12 Causes of Overheating"
>> INSPECTION END
Main 12 Causes of Overheating
ABS0033B
Valve opening temperature:
95
°
C (203
°
F) [standard]
Valve lift:
More than 8.0 mm/108
°
C
(0.315 in/226
°
F)
SLC343
Engine
Step
Inspection item
Equipment
Standard
Reference page
OFF
1
●
Blocked radiator
●
Blocked condenser
●
Blocked radiator grille
●
Blocked bumper
●
Visual
No blocking
—
2
●
Coolant mixture
●
Coolant tester
50 - 50% coolant mixture
See
3
●
Coolant level
●
Visual
Coolant up to MAX level
in reservoir tank and radi-
ator filler neck
See
,
4
●
Radiator cap
●
Pressure tester
59 - 98 kPa (0.6 - 1.0 kg/
cm
2
, 9 - 14 psi) (Limit)
See
ON*
2
5
●
Coolant leaks
●
Visual
No leaks
See
ON*
2
6
●
Thermostat
●
Touch the upper and
lower radiator hoses
Both hoses should be hot
See
STAT AND WATER CON-
TROL VALVE"
, and
.
ON*
1
7
●
Cooling fan
●
CONSULT-II
Operating
See trouble diagnosis for
DTC P1217 (
).
OFF
8
●
Combustion gas leak
●
Color checker chemical
tester 4 Gas analyzer
Negative
—
EC-518
DTC P1217 ENGINE OVER TEMPERATURE
*1: Turn the ignition switch ON.
*2: Engine running at 3,000 rpm for 10 minutes.
*3: Drive at 90 km/h (56 MPH) for 30 minutes and then let idle for 10 minutes.
*4: After 60 minutes of cool down time.
For more information, refer to
CO-5, "OVERHEATING CAUSE ANALYSIS"
ON*
3
9
●
Coolant temperature
gauge
●
Visual
Gauge less than 3/4
when driving
—
●
Coolant overflow to
reservoir tank
●
Visual
No overflow during driv-
ing and idling
OFF*
4
10
●
Coolant return from
reservoir tank to radia-
tor
●
Visual
Should be initial level in
reservoir tank
OFF
11
●
Cylinder head
●
Straight gauge feeler
gauge
0.1 mm (0.004 in) Maxi-
mum distortion (warping)
12
●
Cylinder block and pis-
tons
●
Visual
No scuffing on cylinder
walls or piston
Engine
Step
Inspection item
Equipment
Standard
Reference page
DTC P1220 FUEL PUMP CONTROL MODULE (FPCM)
EC-519
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EC
DTC P1220 FUEL PUMP CONTROL MODULE (FPCM)
PFP:17001
Description
ABS002PR
SYSTEM DESCRIPTION
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
ABS002PS
Specification data are reference values.
On Board Diagnosis Logic
ABS002PT
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
Ignition switch
Start signal
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
●
When cranking engine
HI
●
Idle at 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
EC-520
DTC P1220 FUEL PUMP CONTROL MODULE (FPCM)
DTC Confirmation Procedure
ABS002PV
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 10V 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-522, "Diagnostic Procedure"
.
WITH GST
Follow the procedure WITH CONSULT-II above.
ENG SPEED
1,100 - 2,450 rpm
VHCL SPEED SE
More than 70 km/h (43 MPH)
B/FUEL SCHDL
1 - 10 msec
Selector lever
Suitable position
SEF189Y
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