2008 INFINITI FX35 engine

EC-1030
< SERVICE INFORMATION >[VK45DE]
DTC P1217 ENGINE
OVER TEMPERATURE
DTC P1217 ENGINE OVER TEMPERATURE
DescriptionINFOID:0000000001326896
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-724
.
 If DTC P1217 is displayed with DTC U1010, first pe rform the trouble diagnosis for DTC U1010. Refer
to EC-726
.
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.
The ECM controls the cooling fan corresponding to the vehicle speed, engine coolant temperature, refrigerant
pressure, and air conditioner ON signal. The contro l system has 3-step control [HIGH/MIDDLE/OFF].
Cooling Fan Operation
Cooling Fan Relay Operation
The ECM controls cooling fan relays in the IPDM E/R through CAN communication line.
Sensor Input signal to ECM ECM function Actuator
Crankshaft position sensor (POS)
Camshaft position sensor (PHASE) Engine speed*
1
Cooling fan
controlIPDM E/R
(Cooling fan relay)
Battery
Battery voltage*
1
Wheel sensor
Vehicle speed*2
Engine coolant temperature sensor Engine coolant temperature
Air conditioner switchAir conditioner ON signal*
2
Refrigerant pressure sensor Refrigerant pressure
PBIB2560E
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C

DTC P1217 ENGINE OVER TEMPERATUREEC-1031
< SERVICE INFORMATION > [VK45DE]
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COMPONENT DESCRIPTION
Cooling Fan Motor
The cooling fan at each speed when the current
flows in the cooling fan motor as follows.
CONSULT-III Reference Value in Data Monitor ModeINFOID:0000000001326897
Specification data are reference values.
On Board Diagnosis LogicINFOID:0000000001326898
If the cooling fan or another component in the cooling system malfunctions, engine coolant temperature will
rise.
When the engine coolant temperature reaches an abnorma lly high temperature condition, a malfunction is
indicated.
This self-diagnosis has the on e trip detection logic.
CAUTION:
When a malfunction is in dicated, be sure to replace the coolant. Refer to CO-37, "
Changing Engine
Coolant". Also, replace the engine oil. Refer to LU-24, "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-10, "
Anti-Freeze Coolant Mixture Ratio".
Cooling fan speed Cooling fan relay
13
Stop (OFF) OFF OFF
Middle (MID) OFF ON
High (HI) ON ON
Cooling fan speed Cooling fan motor terminals
(+) (-)
Middle (MID) 1 3 and 4
2 3 and 4
High (HI) 1 and 2 3 and 4
MONITOR ITEM CONDITION SPECIFICATION
COOLING FAN  Engine: After warming up, idle the
engine
 Air conditioner switch: OFF Engine coolant temperature is 94
°C
(201 °F) or less OFF
Engine coolant temperature is between
95 °C (203 °F) and 104 °C (219 °F) MID
Engine coolant temperature is 105 °C
(221 °F) or more HI
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P1217
1217 Engine over tempera-
ture (Overheat)  Cooling fan does not operate properly (Over-
heat).
 Cooling fan system does not operate proper- ly (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 short-
ed.)
 IPDM E/R
 Cooling fan
 Radiator hose
Radiator
Radiator cap
 Water pump
Thermostat
 Water control valve
For more informat ion, refer to EC-1039,
"Main 13 Causes of Overheating".
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C

EC-1032
< SERVICE INFORMATION >[VK45DE]
DTC P1217 ENGINE
OVER TEMPERATURE
2. After refilling coolant, run engine to en sure that no water-flow noise is emitted.
Overall Function CheckINFOID:0000000001326899
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.
WITH CONSULT-III
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-1035,
"Diagnosis Procedure".
2. Confirm whether customer filled the coolant or not. If customer
filled the coolant, skip the following steps and go to EC-1035,
"Diagnosis Procedure".
3. Turn ignition switch ON.
4. Perform “COOLING FAN” in “ACTIVE TEST” mode with CON- SULT-III.
5. If the results are NG, go to EC-1035, "
Diagnosis 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-1035,
"Diagnosis Procedure".
2. Confirm whether customer filled the coolant or not. If customer
filled the coolant, skip the following steps and go to EC-1035,
"Diagnosis Procedure".
3. Disconnect engine coolant temperature sensor harness connec- tor.
4. Connect 200 Ω resister to the engine coolant temperature sensor
harness connector.
5. Start engine and make sure that cooling fan operates at middle speed.
Be careful not to overheat engine.
If NG, go to EC-1035, "
Diagnosis Procedure".
If OK, go to the following step.
6. Turn ignition switch OFF.
7. Disconnect 200 Ω resister from engine coolant temperature sen-
sor harness connector.
8. Connect 150 Ω resistor to engine coolant temperature sensor
harness connector.
SEF621W
SEF621W
PBIB0965E
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C

DTC P1217 ENGINE OVER TEMPERATUREEC-1033
< SERVICE INFORMATION > [VK45DE]
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9. Start engine and make sure that cooling fan operates at higher
speed than middle speed.
Be careful not to overheat engine.
10. If NG, go to EC-1035, "
Diagnosis Procedure".
SEF882V
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C

EC-1034
< SERVICE INFORMATION >[VK45DE]
DTC P1217 ENGINE
OVER TEMPERATURE
Wiring Diagram
INFOID:0000000001326900
TBWM1349E
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C

DTC P1217 ENGINE OVER TEMPERATUREEC-1035
< SERVICE INFORMATION > [VK45DE]
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Diagnosis ProcedureINFOID:0000000001326901
1.CHECK COOLING FAN (CRANKSHAFT DRIVEN)
1. Start engine and let id idle.
2. Make sure that cooling fan (crankshaft driven) operates normally.
OK or NG
OK (With CONSULT-III)>>GO TO 2.
TBWM0255E
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C

EC-1036
< SERVICE INFORMATION >[VK45DE]
DTC P1217 ENGINE
OVER TEMPERATURE
OK (Without CONSULT-III)>>GO TO 4.
NG >> Check cooling fan (crankshaft driven). Refer to CO-48
.
2.CHECK COOLING FAN MIDDLE SPEED OPERATION
With CONSULT-III
1. Start engine and let it idle.
2. Select “COOLING FAN” in “ACTIVE TEST” mode wit h CONSULT-III, and touch “MID” on the CONSULT-III
screen.
3. Make sure that cooling fan operates.
OK or NG
OK >> GO TO 3.
NG >> Check cooling fan middle speed cont rol circuit. (Go to "PROCEDURE A".)
3.CHECK COOLING FAN HIGH SPEED OPERATION
With CONSULT-III
1. Select “COOLING FAN” in “A CTIVE TEST” mode with CONSULT-III and touch “HI” on the CONSULT-III
screen.
2. Make sure that cooling fan operates at higher speed than middle speed.
OK or NG
OK >> GO TO 6.
NG >> Check cooling fan high speed control circuit. (Go to "PROCEDURE B".)
4.CHECK COOLING FAN MIDDLE SPEED OPERATION
Without CONSULT-III
1. Disconnect engine coolant temperature sensor harness connector.
2. Connect 200 Ω resistor to engine coolant tem perature sensor harness connector.
3. Start engine and let it idle.
4. Make sure that cooling fan operates.
OK or NG
OK >> GO TO 5.
NG >> Check cooling fan middle speed control circuit. (Go to "PROCEDURE A".)
5.CHECK COOLING FAN HIGH SPEED OPERATION
Without CONSULT-III
1. Disconnect 200 Ω resister to the engine coolant te mperature sensor harness connector.
2. Connect 150 Ω resistor to engine coolant tem perature sensor harness connector.
3. Start engine and let it idle.
4. Make sure that cooling fan operates at higher speed than middle speed.
OK or NG
OK >> GO TO 6.
NG >> Check cooling fan control circuit. (Go to "PROCEDURE B".)
6.CHECK COOLING SYSTEM FOR LEAK
PBIB0965E
SEF882V
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C

DTC P1217 ENGINE OVER TEMPERATUREEC-1037
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Apply pressure to the cooling sys
tem with a tester, and check if the
pressure drops.
CAUTION:
Higher than the specified pressu re may cause radiator damage.
Pressure should not drop.
OK or NG
OK >> GO TO 7.
NG >> Check the following for leak. Refer to CO-37, "
Inspec-
tion".
Hose
 Radiator
 Water pump
7.CHECK RADIATOR CAP
Apply pressure to cap with a tester.
OK or NG
OK >> GO TO 8.
NG >> Replace radiator cap.
8.CHECK COMPONENT PARTS
Check the following.
 Thermostat. (Refer to CO-52
.)
 Water control valve. (Refer to CO-52
.)
 Engine coolant temperature sensor. (Refer to EC-783, "
Component Inspection".)
OK or NG
OK >> GO TO 9.
NG >> Replace malfunctioning component.
9.CHECK MAIN 13 CAUSES
If the cause cannot be isolated, go to EC-1039, "
Main 13 Causes of Overheating".
>> INSPECTION END
PROCEDURE A
1.CHECK POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R harness connector E6.
3. Check voltage between IPDM E/R terminal 16 and ground with CONSULT-III or tester.
OK or NG
OK >> GO TO 3.
NG >> GO TO 2. Testing pressure: 157 kPa (1.6 kg/cm
2, 23 psi)
PBIC1528E
Radiator cap
relief pressure:
59 - 98 kPa (0.6 - 1.0 kg/cm2, 9 - 14 psi)
SLC755A
Voltage: Battery voltage
PBIB0966E
3AA93ABC3ACD3AC03ACA3AC03AC63AC53A913A773A893A873A873A8E3A773A983AC73AC93AC03AC3
3A893A873A873A8F3A773A9D3AAF3A8A3A8C3A863A9D3AAF3A8B3A8C