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
. 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-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
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.
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
"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.
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
.
2.
Confirm whether customer filled the coolant or not. If customer
filled the coolant, skip the following steps and go to
.
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.
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
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст