2007 INFINITI M35 coolant

DTC P1217 ENGINE OVER TEMPERATURE
EC-499
[VQ35DE]
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Revision: 2007 April2007 M35/M45
DTC P1217 ENGINE OVER TEMPERATUREPFP:00000
DescriptionNBS00532
SYSTEM DESCRIPTION
NOTE:

If DTC P1217 is displayed with DTC U1000 or U1001, first perform the trouble diagnosis for DTC
U1000, U1001. Refer to EC-161, "
DTC U1000, U1001 CAN COMMUNICATION LINE" .

If DTC P1217 is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010.
Refer to EC-164, "
DTC U1010 CAN COMMUNICATION" .
Cooling Fan Control
*1: The ECM determines the start signal status by the signals of engine speed and battery voltage.
*2: This signal is sent to ECM through CAN communication line.
ECM controls cooling fan speed corresponding to vehicle speed, engine coolant temperature, air conditioner
ON signal, refrigerant pressure, target A/C evaporator temperature and A/C evaporator temperature.
Cooling fan control signal is sent to IPDM E/R from ECM by CAN communication line. Then, IPDM E/R sends
ON/OFF pulse duty signal to cooling fan control module. Corresponding to this ON/OFF pulse duty signal,
cooling fan control module gives cooling fan motor operating voltage to cooling fan motors. Cooling fan speed
is controlled by duty cycle of cooling fan motor operating voltage sent from cooling fan control module.
COMPONENT DESCRIPTION
Cooling Fan Control Module
Cooling fan control module (1) receives ON/OFF pulse duty signal
from IPDM E/R. Corresponding to this ON/OFF pulse duty signal,
cooling fan control module sends cooling fan motor operating volt-
age to cooling fan motor. The revolution speed of cooling fan motor
is controlled by duty cycle of the voltage.

: Vehicle front

Cooling fan motor-1 (2)

Cooling fan motor-2 (3)
Sensor Input signal to ECM ECM function Actuator
Crankshaft position sensor (POS)
Camshaft position sensor (PHASE)Engine speed*
1
Cooling fan
control

IPDM E/R

Cooling fan relay

Cooling fan control
module Battery
Battery voltage*
1
Wheel sensor
Vehicle speed*2
Engine coolant temperature sensor Engine coolant temperature
Air conditioner switch
Air conditioner ON signal*
2
Refrigerant pressure sensor Refrigerant pressure
Unified meter and A/C amp.
Target A/C evaporator temperature*
2
Intake sensor
A/C evaporator temperature*2
PBIB3352E

EC-500
[VQ35DE]
DTC P1217 ENGINE OVER TEMPERATURE
Revision: 2007 April2007 M35/M45
Cooling Fan Motor
Cooling fan motor receives cooling fan motor operating voltage from
cooling fan control module (1). The revolution speed of cooling fan
motor is controlled by duty cycle of the voltage.

: Vehicle front

Cooling fan motor-1 (2)

Cooling fan motor-2 (3)
CONSULT-II Reference Value in Data Monitor ModeNBS00533
Specification data are reference values.
On Board Diagnosis LogicNBS00534
If the cooling fan or another component in the cooling system malfunctions, engine coolant temperature will
rise.
When the engine coolant temperature reaches an abnormally high temperature condition, a malfunction is
indicated.
This self-diagnosis has the one trip detection logic.
CAUTION:
When a malfunction is indicated, be sure to replace the coolant. Refer to CO-11, "
Changing Engine
Coolant" . Also, replace the engine oil. Refer to LU-9, "Changing Engine Oil" .
1. Fill radiator with coolant up to specified level with a filling speed of 2 liters per minute. Be sure to
use coolant with the proper mixture ratio. Refer to MA-13, "
Anti-Freeze Coolant Mixture Ratio" .
2. After refilling coolant, run engine to ensure that no water-flow noise is emitted.
Overall Function CheckNBS00535
Use this procedure to check the overall function of the cooling fan. During this check, a DTC might not be con-
firmed.
WARNING:
Never remove the radiator cap when the engine is hot. Serious burns could be caused by high pres-
sure fluid escaping from the radiator.
Wrap a thick cloth around cap. Carefully remove the cap by turning it a quarter turn to allow built-up
pressure to escape. Then turn the cap all the way off.
PBIB3352E
MONITOR ITEM CONDITION SPECIFICATION
FA N DU T Y

Engine: Running 0 - 100%
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P1217
1217Engine over tempera-
ture (Overheat)

Cooling fan does not operate properly (Over-
heat).

Cooling fan system does not operate prop-
erly (Overheat).

Engine coolant was not added to the system
using the proper filling method.

Engine coolant is not within the specified
range.

Harness or connectors
(The cooling fan circuit is open or
shorted.)

IPDM E/R

Cooling fan control module

Cooling fan motor

Radiator hose

Radiator

Radiator cap

Water pump

Thermostat
For more information, refer to EC-507,
"Main 12 Causes of Overheating" .

DTC P1217 ENGINE OVER TEMPERATURE
EC-501
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Revision: 2007 April2007 M35/M45
WITH CONSULT-II
1. Check the coolant level in the reservoir tank and radiator.
Allow engine to cool before checking coolant level.
If the coolant level in the reservoir tank and/or radiator is below
the proper range, skip the following steps and go to EC-504,
"Diagnostic Procedure" .
2. Confirm whether customer filled the coolant or not. If customer
filled the coolant, skip the following steps and go to EC-504,
"Diagnostic Procedure" .
3. Turn ignition switch ON.
4. Perform “FAN DUTY CONTROL” in “ACTIVE TEST” mode with
CONSULT-II.
5. Make sure that cooling fan speed varies according to the per-
cent.
6. If the results are NG, go to EC-504, "
Diagnostic Procedure" .
WITH GST
1. Check the coolant level in the reservoir tank and radiator.
Allow engine to cool before checking coolant level.
If the coolant level in the reservoir tank and/or radiator is below
the proper range, skip the following steps and go to EC-504,
"Diagnostic Procedure" .
2. Confirm whether customer filled the coolant or not. If customer
filled the coolant, skip the following steps and go to EC-504,
"Diagnostic Procedure" .
3. Perform IPDM E/R auto active test and check cooling fan motors
operation, refer to PG-23, "
Auto Active Test" .
4. If NG, go to EC-504, "
Diagnostic Procedure" .
SEF621W
PBIB2737E
SEF621W

EC-504
[VQ35DE]
DTC P1217 ENGINE OVER TEMPERATURE
Revision: 2007 April2007 M35/M45
Diagnostic ProcedureNBS00537
1. CHECK COOLING FAN OPERATION
With CONSULT-II
1. Turn ignition switch ON.
2. Perform “FAN DUTY CONTROL” in “ACTIVE TEST” mode with
CONSULT-II.
3. Make sure that cooling fan speed varies according to the per-
cent.
Without CONSULT-II
1. Perform IPDM E/R auto active test and check cooling fan motors
operation, refer to PG-23, "
Auto Active Test" .
2. Make sure that cooling fan operates.
OK or NG
OK >> GO TO 2.
NG >> GO TO 5.
2. CHECK COOLING SYSTEM FOR LEAK
Refer to CO-11, "
LEAK CHECK"
OK or NG
OK >> GO TO 3.
NG >> Check the following for leak.

Hose

Radiator

Water pump
3. CHECK COMPONENT PARTS
Check the following.

Radiator cap. Refer to CO-16, "Checking Radiator Cap" .

Thermostat. Refer to CO-29, "WATER INLET AND THERMOSTAT ASSEMBLY" .

Engine coolant temperature sensor. Refer to EC-218, "Component Inspection" .
OK or NG
OK >> GO TO 4.
NG >> Replace malfunctioning component.
4. CHECK MAIN 12 CAUSES
If the cause cannot be isolated, go to EC-507, "
Main 12 Causes of Overheating" .
>>INSPECTION END
PBIB2737E

DTC P1217 ENGINE OVER TEMPERATURE
EC-507
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Revision: 2007 April2007 M35/M45
12. DETECT MALFUNCTIONING PART
Check the following.

10A fuse

Fuse block (J/B) connector E102

50A fusible link

Harness for open or short between cooling fan relay and fuse

Harness for open or short between cooling fan relay and battery
>> Repair open circuit or short to ground or short to power in harness or connectors.
13. CHECK COOLING FAN CONTROL MODULE POWER SUPPLY CIRCUIT-III
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R harness connector E9.
3. Check harness continuity between the following;
Cooling fan relay terminal 2 and IPDM E/R terminal 56,
Cooling fan relay terminal 5 and cooling fan control module terminal 3.
Refer to wiring diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 14.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
14. CHECK COOLING FAN RELAY
Refer to EC-509, "
Component Inspection" .
OK or NG
OK >> GO TO 15.
NG >> Replace cooling fan relay.
15. CHECK INTERMITTENT INCIDENT
Perform EC-153, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
OK or NG
OK >> Replace IPDM E/R. Refer to PG-18, "IPDM E/R (INTELLIGENT POWER DISTRIBUTION MOD-
ULE ENGINE ROOM)" .
NG >> Repair or replace harness connectors.
Main 12 Causes of OverheatingNBS00538
Continuity should exist.
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 mixtureMA-13, "Anti-Freeze
Coolant Mixture Ratio"
3
Coolant level
Visual Coolant up to MAX level
in reservoir tank and radi-
ator filler neckMA-15, "Changing
Engine Coolant"
4
Radiator cap
Pressure tester 59 - 98 kPa
(0.6 - 1.0 kg/cm2 , 9 - 14
psi) (Limit)CO-16, "
Checking Radia-
tor Cap"

EC-508
[VQ35DE]
DTC P1217 ENGINE OVER TEMPERATURE
Revision: 2007 April2007 M35/M45
*1: Turn the ignition switch ON.
*2: Engine running at 3,000 rpm for 10 minutes.
*3: Drive at 90 km/h (55 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-7, "
OVERHEATING CAUSE ANALYSIS" . ON*
25
Coolant leaks
Visual No leaksCO-11, "LEAK CHECK"
ON*26
Thermostat
Touch the upper and
lower radiator hosesBoth hoses should be hotCO-29, "WATER INLET
AND THERMOSTAT
ASSEMBLY"
ON*17
Cooling fan
CONSULT-II Operating See trouble diagnosis for
DTC P1217 (EC-499
).
OFF 8

Combustion gas leak
Color checker chemical
tester 4 Gas analyzerNegative —
ON*
39
Coolant temperature
gauge
Visual Gauge less than 3/4
when driving—

Coolant overflow to
reservoir tank
Visual No overflow during driving
and idlingMA-15, "Changing
Engine Coolant"
OFF*410
Coolant return from
reservoir tank to radia-
tor
Visual Should be initial level in
reservoir tankMA-15, "Changing
Engine Coolant"
OFF 11
Cylinder head
Straight gauge feeler
gauge0.1 mm (0.004 in) Maxi-
mum distortion (warping)EM-102, "CYLINDER
HEAD"
12
Cylinder block and pis-
tons
Visual No scuffing on cylinder
walls or pistonEM-124, "CYLINDER
BLOCK"
Engine Step Inspection item Equipment Standard Reference page

EC-510
[VQ35DE]
DTC P1220 FUEL PUMP CONTROL MODULE (FPCM)
Revision: 2007 April2007 M35/M45
DTC P1220 FUEL PUMP CONTROL MODULE (FPCM)PFP:17001
DescriptionNBS0053A
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 ModeNBS0053B
Specification data are reference values.
On Board Diagnosis LogicNBS0053C
Sensor Input Signal to ECM ECM function Actuator
Crankshaft position sensor (POS)
Camshaft position sensor (PHASE)Engine speed*
Fuel pump controlFuel 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 conditionshighBattery 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
1220Fuel 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-522
[VQ35DE]
DTC P1421 COLD START CONTROL
Revision: 2007 April2007 M35/M45
DTC P1421 COLD START CONTROLPFP:23710
DescriptionNBS005S9
ECM controls ignition timing and engine idle speed when engine is started with prewarming up condition.
This control promotes the activation of three way catalyst by heating the catalyst and reduces emissions.
On Board Diagnosis LogicNBS005SA
DTC Confirmation ProcedureNBS005SB
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.

If DTC P1421 is displayed with other DTC, first perform the trouble diagnosis for other DTC.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 11V at idle.
WITH CONSULT-II
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Select “DATA MONITOR” mode with CONSULT-II.
4. Check that the “COOLAN TEMP/S” indication is between 4°C
(39°F) and 36°C (97°F).
If “COOLAN TEMP/S” indication is within the specified value, go
to the following step.
If “COOLANT TEMP/S” indication is out of the specified value,
cool engine down or warm engine up and go to step 1.
5. Start engine and let it idle for 5 minutes.
6. If 1st trip DTC is detected, go to EC-522, "
Diagnostic Procedure"
.
WITH GST
Follow the procedure “WITH CONSULT-II” above.
Diagnostic ProcedureNBS005SC
1. PERFORM IDLE AIR VOLUME LEARNING
Perform EC-86, "
Idle Air Volume Learning" .
Is Idle Air Volume Learning carried out successfully?
Ye s o r N o
Yes >> GO TO 2.
No >> Follow the instruction of Idle Air Volume Learning.
2. CHECK INTAKE SYSTEM
Check for the cause of intake air volume lacking. Refer to the following.

Crushed intake air passage

Intake air passage clogging
OK or NG
OK >> GO TO 3.
NG >> Repair or replace malfunctioning part
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P1421
1421Cold start emission reduction
strategy monitoringECM does not control ignition timing and engine
idle speed properly when engine is started with
prewarming up condition.

Lack of intake air volume

Fuel injection system

ECM
SEF174Y