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 

CO-24, "THERMOSTAT AND

WATER CONTROL VALVE"

 .

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 

MA-10, "RECOM-

MENDED FLUIDS AND 
LUBRICANTS"

 , 

3

●

Coolant level

●

Visual

Coolant up to MAX level 
in reservoir tank and radi-
ator filler neck

See 

MA-12, "Changing 

Engine Coolant"

 , 

4

●

Radiator cap

●

Pressure tester

59 - 98 kPa (0.6 - 1.0 kg/

cm

2

 , 9 - 14 psi) (Limit)

See 

LU-4, "LUBRICA-

TION SYSTEM"

 .

ON*

2

5

●

Coolant leaks

●

Visual

No leaks

See 

LU-4, "LUBRICA-

TION SYSTEM"

 .

ON*

2

6

●

Thermostat

●

Touch the upper and 
lower radiator hoses

Both hoses should be hot

See 

CO-24, "THERMO-

STAT AND WATER CON-
TROL VALVE"

 , and 

CO-

12, "RADIATOR"

 .

ON*

1

7

●

Cooling fan

●

CONSULT-II

Operating

See trouble diagnosis for 
DTC P1217 (

EC-514

 ).

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

See 

MA-12, "Changing 

Engine Coolant"

 .

OFF*

4

10

●

Coolant return from 
reservoir tank to radia-
tor

●

Visual

Should be initial level in 
reservoir tank

See 

MA-12, "ENGINE 

MAINTENANCE"

 .

OFF

11

●

Cylinder head

●

Straight gauge feeler 
gauge

0.1 mm (0.004 in) Maxi-
mum distortion (warping)

See 

EM-65, "CYLINDER 

HEAD"

 .

12

●

Cylinder block and pis-
tons

●

Visual

No scuffing on cylinder 
walls or piston

See 

EM-80, "CYLINDER 

BLOCK"

 .

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