INFINITI FX35 2006 Service Manual

DTC P1217 ENGINE OVER TEMPERATURE EC-497
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Revision: 2006 December 2006 FX35/FX45
DTC P1217 ENGINE OVER TEMPERATUREPFP:00000
DescriptionNBS003UH
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-156, "
DTC U1000, U1001 CAN COMMUNICATION LINE" .

If DTC P1217 is displayed with DTC U1010, first performed the trouble diagnosis for DTC U1010.
Refer to EC-159, "
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.
The ECM controls the cooling fan corresponding to the vehicle speed, engine coolant temperature, refrigerant
pressure, and air conditioner ON signal. The control system has 4-step control [HIGH/MIDDLE/LOW/OFF].
Cooling Fan Operation
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)
Battery
Battery voltage*
1
Wheel sensorVehicle speed*2
Engine coolant temperature sensor Engine coolant temperature
Air conditioner switch Air conditioner ON signal*
2
Refrigerant pressure sensor Refrigerant pressure
PBIB3254E

EC-498
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DTC P1217 ENGINE OVER TEMPERATURE
Revision: 2006 December 2006 FX35/FX45
Cooling Fan Relay Operation
The ECM controls cooling fan relays in the IPDM E/R through CAN communication line.
COMPONENT DESCRIPTION
Cooling Fan Motor
The cooling fan operates at each speed when the current flows in the cooling fan motor as follows.
The cooling fan operates at low (LOW) speed when cooling fan motors-1 and -2 are circuited in series under
middle speed condition.
CONSULT-II Reference Value in Data Monitor ModeNBS003UI
Specification data are reference values.
On Board Diagnosis LogicNBS003UJ
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.
Cooling fan speed Cooling fan relay
123
Stop (OFF) OFF OFF OFF
Low (LOW) OFF ON OFF
Middle (MID) OFF OFF ON
High (HI) ON OFF ON
Cooling fan speed Cooling fan motor terminals
(+) ( −)
Middle (MID) 1 3 and 4
2 3 and 4
1 and 2 3
1 and 2 4
High (HI) 1 and 2 3 and 4
MONITOR ITEM CONDITION SPECIFICATION
AIR COND SIG

Engine: After warming up, idle
the engine Air conditioner switch: OFF OFF
Air conditioner switch: ON
(Compressor operates.) ON
COOLING FAN

Engine: After warming up, idle
the engine

Air conditioner switch: OFF Engine coolant temperature is 97
°C
(207 °F) or less OFF
Engine coolant temperature is
between 98 °C (208 °F) and 99 °C
(210 °F) LOW
Engine coolant temperature is
between 100 °C (212 °F) and 104 °C
(219 °F) MID
Engine coolant temperature is 105 °C
(221 °F) or more HI

DTC P1217 ENGINE OVER TEMPERATURE EC-499
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Revision: 2006 December 2006 FX35/FX45
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 CheckNBS003UK
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-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-503,
"PROCEDURE A" .
2. Confirm whether customer filled the coolant or not. If customer filled the coolant, skip the following steps and go to EC-503,
"PROCEDURE A" .
3. Turn ignition switch ON.
4. Perform “COOLING FAN” in “ACTIVE TEST” mode with CON- SULT-II.
5. If the results are NG, go to EC-505, "
PROCEDURE B" .
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 prop-
erly (Overheat).

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

Engine coolant is not within the specified
range.

Harness or connectors
(Cooling fan circuit is open or shorted.)

IPDM E/R

Cooling fan

Radiator hose

Radiator

Radiator cap

Water pump

Thermostat
For more information, refer to EC-508,
"Main 12 Causes of Overheating" .
SEF621W
SEF646X

EC-500
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DTC P1217 ENGINE OVER TEMPERATURE
Revision: 2006 December 2006 FX35/FX45
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-503,
"PROCEDURE A" .
2. Confirm whether customer filled the coolant or not. If customer filled the coolant, skip the following steps and go to EC-503,
"PROCEDURE A" .
3. Perform IPDM E/R auto active test and check cooling fan motors operation, refer to PG-21, "
Auto Active Test"
4. If NG, go to EC-505, "PROCEDURE B" .SEF621W

DTC P1217 ENGINE OVER TEMPERATURE EC-501
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Revision: 2006 December 2006 FX35/FX45
Wiring DiagramNBS003UL
TBWM1399E

EC-502
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DTC P1217 ENGINE OVER TEMPERATURE
Revision: 2006 December 2006 FX35/FX45
TBWM0307E

DTC P1217 ENGINE OVER TEMPERATURE EC-503
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Revision: 2006 December 2006 FX35/FX45
Diagnostic ProcedureNBS003UM
PROCEDURE A
1. INSPECTION START
Do you have CONSULT-II?
Ye s o r N o
Ye s > > G O T O 2 .
No >> GO TO 3.
2. CHECK COOLING FAN OPERATION
With CONSULT-II
1. Start engine and let it idle.
2. Select “COOLING FAN” in “ACTIVE TEST” mode with CON- SULT-II.
3. Make sure that cooling fans-1 and -2 operate at each speed (LOW/MID/HI).
OK or NG
OK >> GO TO 4.
NG >> Check cooling fan control circuit. (Go to EC-505, "
PRO-
CEDURE B" .)
3. CHECK COOLING FAN OPERATION
Without CONSULT-II
1. Perform IPDM E/R auto active test and check cooling fan motors operation, refer to PG-21, "
Auto Active
Te s t" .
2. Make sure that cooling fans-1 and -2 operate at each speed (Low/Middle/High).
OK or NG
OK >> GO TO 4.
NG >> Check cooling fan control circuit. (Go to EC-505, "
PROCEDURE B" .)
4. CHECK COOLING SYSTEM FOR LEAK
Refer to CO-11, "
LEAK CHECK" .
OK or NG
OK >> GO TO 5.
NG >> Check the following for leak.

Hose

Radiator

Water pump
5. CHECK RADIATOR CAP
Refer to CO-15, "
Checking Radiator Cap" .
OK or NG
OK >> GO TO 6.
NG >> Replace radiator cap.
SEF784Z

EC-504
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DTC P1217 ENGINE OVER TEMPERATURE
Revision: 2006 December 2006 FX35/FX45
6. CHECK THERMOSTAT
Refer to CO-27, "
WATER INLET AND THERMOSTAT ASSEMBLY" .
OK or NG
OK >> GO TO 7.
NG >> Replace thermostat
7. CHECK ENGINE COOLANT TEMPERATURE SENSOR
Refer to EC-214, "
Component Inspection" .
OK or NG
OK >> GO TO 8.
NG >> Replace engine coolant temperature sensor.
8. CHECK MAIN 12 CAUSES
If the cause cannot be isolated, go to EC-508, "
Main 12 Causes of Overheating" .
>> INSPECTION END

DTC P1217 ENGINE OVER TEMPERATURE EC-505
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Revision: 2006 December 2006 FX35/FX45
PROCEDURE B
1. CHECK COOLILNG FAN POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R harness connectors E6.
3. Check voltage between IPDM E/R terminal 16 and ground with CONSULT-II or tester.
OK or NG
OK >> GO TO 3.
NG >> GO TO 2.
2. DETECT MALFUNCTIONING PART
Check the following.

40A fusible link

Harness for open or short between IPDM E/R and battery
>> Repair open circuit or short to ground or short to power in harness or connectors.
3. CHECK COOLING FAN GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check harness continuity between IPDM E/R terminal 15, 38, 60 and ground. Refer to Wiring Diagram.
3. Also check harness for short to power.
OK or NG
OK >> GO TO 4.
NG >> Repair open circuit or short to power in harness or connectors. Voltage: Battery voltage
PBIB0966E
Continuity should exist.

EC-506
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DTC P1217 ENGINE OVER TEMPERATURE
Revision: 2006 December 2006 FX35/FX45
4. CHECK COOLING FAN MOTOR-1 CIRCUIT-I
1. Disconnect cooling fan motor-1 harness connector.
2. Check voltage between cooling fan motor-1 terminals 1, 2 and ground with CONSULT-II or tester.
OK or NG
OK >> GO TO 6.
NG >> GO TO 5.
5. DETECT MALFUNCTIONING PART
Check the following.

40A fusible link

Harness connectors E29, E121

Harness for open or short between cooling fan motor-1 and battery
>> Repair open circuit or short to ground or short to power in harness or connectors.
6. CHECK COOLING FAN MOTOR-1 CIRCUIT-II
1. Check harness continuity between the following; cooling fan motor-1 terminal 3 and IPDM E/R terminal 13,
cooling fan motor-1 terminal 4 and IPDM E/R terminals 10, 12.
Refer to Wiring diagram.
2. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 8.
NG >> GO TO 7.
7. DETECT MALFUNCTIONING PART
Check the following.

Harness connectors E29, E121

Harness for open or short between cooling fan motor-1 and IPDM E/R
>> Repair open circuit or short to ground or short to power in harness or connectors.
PBIB1554E
Voltage: Battery voltage
PBIB1670E
Continuity should exist.