Infiniti FX35 / FX45. Manual — part 419
DTC P1217 ENGINE OVER TEMPERATURE
EC-437
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[VQ35DE]
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DTC P1217 ENGINE OVER TEMPERATURE
Description
INFOID:0000000001326291
SYSTEM DESCRIPTION
NOTE:
• If DTC P1217 is displayed with DTC U1000 or U1001, first perform the trouble diagnosis for DTC
U1000, U1001. Refer to
• If DTC P1217 is displayed with DTC U1010, first performed the trouble diagnosis for DTC U1010.
Refer to
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
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
control
IPDM E/R
(Cooling fan relay)
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
PBIB3369E
EC-438
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[VQ35DE]
DTC P1217 ENGINE OVER TEMPERATURE
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-III Reference Value in Data Monitor Mode
INFOID:0000000001326292
Specification data are reference values.
On Board Diagnosis Logic
INFOID:0000000001326293
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
1
2
3
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 be-
tween 98
°
C (208
°
F) and 99
°
C (210
°
F)
LOW
Engine coolant temperature is be-
tween 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-439
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CAUTION:
When a malfunction is indicated, be sure to replace the coolant. Refer to
. Also, replace the engine oil. Refer to
.
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"
2.
After refilling coolant, run engine to ensure that no water-flow noise is emitted.
Overall Function Check
INFOID:0000000001326294
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
2.
Confirm whether customer filled the coolant or not. If customer
filled the coolant, skip the following steps and go to
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
.
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
2.
Confirm whether customer filled the coolant or not. If customer
filled the coolant, skip the following steps and go to
3.
Perform IPDM E/R auto active test and check cooling fan motors
operation, refer to
4.
If NG, go to
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 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
"Main 12 Causes of Overheating"
SEF621W
SEF621W
EC-440
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[VQ35DE]
DTC P1217 ENGINE OVER TEMPERATURE
Wiring Diagram
INFOID:0000000001326295
TBWM1399E
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