Infiniti Q45. Manual - part 469

DTC P1217 ENGINE OVER TEMPERATURE

EC-515

C

D

E

F

G

H

I

J

K

L

M

A

EC

Cooling Fan Relay Operation

The ECM controls cooling fan relays as follows.

*: Cooling fan-2 operates at high speed, and cooling fan-1 operates at middle speed.

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 Mode

NBS0021S

Specification data are reference values.

Cooling fan speed

Cooling fan relay

1

2

3

Stop (OFF)

OFF

OFF

OFF

Low (LOW)

OFF

ON

OFF

Middle (MID)

ON

OFF

OFF

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

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 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

EC-516

DTC P1217 ENGINE OVER TEMPERATURE

On Board Diagnosis Logic

NBS0021T

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-8, "Changing Engine

Coolant"

 . Also, replace the engine oil. Refer to 

LU-7, "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-11, "Anti-Freeze Coolant Mixture Ratio"

 .

2.

After refilling coolant, run engine to ensure that no water-flow noise is emitted.

Overall Function Check

NBS0021U

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-520,

"Diagnostic Procedure"

 .

2.

Confirm whether customer filled the coolant or not. If customer
filled the coolant, skip the following steps and go to 

EC-520,

"Diagnostic Procedure"

 .

3.

Turn ignition switch ON.

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
(The cooling fan circuit is open or 
shorted.)

●

Cooling fan

●

Radiator hose

●

Radiator

●

Radiator cap

●

Water pump

●

Thermostat

For more information, refer to 

EC-532, 

"Main 13 Causes of Overheating"

 .

SEF621W

DTC P1217 ENGINE OVER TEMPERATURE

EC-517

C

D

E

F

G

H

I

J

K

L

M

A

EC

4.

Perform “COOLING FAN” in “ACTIVE TEST” mode with CON-
SULT-II.

CAUTION:

Never change cooling fan speed from “LOW” to “HI” or
from “HI” to “LOW” directly. Change the speed through
“MID” to prevent cooling fan motor from damage.

5.

If the results are NG, go to 

EC-520, "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-520,

"Diagnostic Procedure"

 .

2.

Confirm whether customer filled the coolant or not. If customer
filled the coolant, skip the following steps and go to 

EC-520,

"Diagnostic Procedure"

 .

3.

Start engine.
Be careful not to overheat engine.

4.

Turn air conditioner switch ON.

5.

Turn blower fan switch ON.

6.

Make sure that cooling fan operates at low speed.
If NG, go to 

EC-520, "Diagnostic Procedure"

 .

If OK, go to the following step.

7.

Turn ignition switch OFF.

8.

Disconnect engine coolant temperature sensor harness connec-
tor.

9.

Connect 200

Ω

 resistor to engine coolant temperature sensor

harness connector.

10. Restart engine.
11. Turn air conditioner switch and blower fan switch ON.

12. Make sure that cooling fan operates at higher speed than low

speed.

13. If NG, go to 

EC-520, "Diagnostic Procedure"

 .

If OK, go to the following step.

14. Turn ignition switch OFF.

15. Turn air conditioner switch and blower fan switch OFF.

16. Disconnect 200

Ω

 resistor then connect 150

Ω

 resistor to engine

coolant temperature sensor harness connector.

SEF646X

SEF621W

SEC163BA

Be careful not to overheat engine.

PBIB1667E

EC-518

DTC P1217 ENGINE OVER TEMPERATURE

17. Restart engine and make sure that cooling fan-2 operates at

higher speed than the speed at step 12.

18. If NG, go to 

EC-520, "Diagnostic Procedure"

 .

Be careful not to overheat engine.

MEC475B