Nissan Primera P11. Instruction — part 270
System Description
NCEC0433
COOLING FAN CONTROL
NCEC0433S01
Sensor
Input Signal to ECM
ECM func-
tion
Actuator
Vehicle speed sensor or ABS actuator and
electric unit (control unit)
Vehicle speed
ECM
Cooling fan relay(s)
Engine coolant temperature sensor
Engine coolant temperature
Air conditioner switch
Air conditioner “ON” signal
Ignition switch
Start signal
Refrigerant pressure sensor
Refrigerant pressure
The ECM controls the cooling fan corresponding to the vehicle speed, engine coolant temperature, refriger-
ant pressure, and air conditioner ON signal. The control system has ON-OFF control.
The refrigerant pressure sensor uses an electrostatic volume pressure transducer to convert refrigerant pres-
sure to voltage. The transducer is installed in the liquid tank of the air conditioner system.
OPERATION
NCEC0433S02
SEF099X
SEF198X
Refrigerant pressure is less than 1.76 Mpa.
Refrigerant pressure is between 1.76 Mpa and 2.06 Mpa.
Refrigerant pressure is above 2.06 Mpa.
20 (12)
80 (50)
Vehicle speed km/h (MPH)
20 (12) 80 (50)
Vehicle speed km/h (MPH)
20 (12)
80 (50)
Vehicle speed km/h (MPH)
Cooling fans operate
at “High” speed.
Cooling fans operate
at “Low” speed.
Cooling fans
do no operate
105 (221)
100 (212)
95 (203)
105 (221)
100 (212)
95 (203)
105 (221)
100 (212)
95 (203)
Engine
coolant
temperature
°C
(°F)
Engine
coolant
temperature
°C
(°F)
Engine
coolant
temperature
°C
(°F)
DTC P1217 OVERHEAT (COOLING SYSTEM)
SR20DE
System Description
EC-279
CONSULT-II Reference Value in Data Monitor
Mode
NCEC0486
Specification data are reference values.
MONITOR ITEM
CONDITION
SPECIFICATION
AIR COND SIG
I
Engine: After warming up, idle the
engine
Air conditioner switch: OFF
OFF
Air conditioner switch: ON
(Compressor operates)
ON
COOLING FAN
I
After warming up engine, idle the
engine.
I
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)
LOW
Engine coolant temperature is 105°C
(221°F) or more
HIGH
ECM Terminals and Reference Value
NCEC0487
Specification data are reference values and are measured between each terminal and 48 (ECM ground).
TERMI-
NAL NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
13
LG/R
Cooling fan relay
[Engine is running]
I
Cooling fan is not operating
BATTERY VOLTAGE
(11 - 14V)
[Engine is running]
I
Cooling fan is operating
Approximately 0V
23
—
Air conditioner switch
[Engine is running]
I
Both air conditioner switch and blower switch are
“ON” (Compressor operates)
Approximately 0V
[Engine is running]
I
Air conditioner switch is “OFF”
BATTERY VOLTAGE
(11 - 14V)
74
R/L
Refrigerant pressure
sensor
[Engine is running]
I
Warm-up condition
I
Idle speed
I
Air conditioner is “ON”
More than 1.5V
On Board Diagnosis Logic
NCE0488
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.
DTC No.
Malfunction is detected when ...
Check Items
(Possible Cause)
P1217
1217
I
Cooling fan does not operate properly (Overheat).
I
Cooling fan system does not operate properly (Overheat).
I
Engine coolant was not added to the system using the
proper filling method.
I
Harness or connectors
(The cooling fan circuit is open or shorted).
I
Cooling fan
I
Radiator hose
I
Radiator
I
Radiator cap
I
Water pump
I
Thermostat
For more information, refer to “MAIN 12 CAUSES
OF OVERHEATING”, EC-SR-288.
CAUTION:
When a malfunction is indicated, be sure to replace the coolant following the procedure in the MA
section (“Changing Engine Coolant”, “ENGINE MAINTENANCE”). Also, replace the 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 section (“Anti-freeze Coolant Mixture Ratio”,
“RECOMMENDED FLUIDS AND LUBRICANTS”).
2) After refilling coolant, run engine to ensure that no water-flow noise is emitted.
DTC P1217 OVERHEAT (COOLING SYSTEM)
SR20DE
CONSULT-II Reference Value in Data Monitor Mode
EC-280
Overall Function Check
NCEC0489
Use this procedure to check the overall function of the cooling fan.
During this check, a DTC might not be confirmed.
WARNING:
Never remove the radiator cap when the engine is hot. Serious
burns could be caused by high pressure 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 “Diagnos-
tic Procedure”, EC-SR-284.
2)
Confirm whether customer filled the coolant or not. If customer
filled the coolant, skip the following steps and go to “Diagnos-
tic Procedure”, EC-SR-284.
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 “Diagnostic Procedure”, EC-SR-
284.
Without 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 “Diagnos-
tic Procedure”, EC-SR-284.
2)
Confirm whether customer filled the coolant or not. If customer
filled the coolant, skip the following steps and go to “Diagnos-
tic Procedure”, EC-SR-284.
3)
Start engine.
Be careful not to overheat engine.
4)
Set temperature control lever to full cold position.
5)
Turn air conditioner switch “ON”.
6)
Turn blower fan switch “ON”.
7)
Run engine at idle for a few minutes with air conditioner oper-
ating.
Be careful not to overheat engine.
8)
Make sure that cooling fan operates.
If NG, go to “Diagnostic Procedure”, EC-SR-284.
SEF621WA
SEF111X
SEC163BA
DTC P1217 OVERHEAT (COOLING SYSTEM)
SR20DE
Overall Function Check
EC-281
Wiring Diagram
NCEC0490
YEC847
Detectable line for DTC
Non-detectable line for DTC
COOLING
FAN
RELAY
FUSE
BLOCK
(J/B)
COOLING
FAN
MOTOR-2
Refer to EL-POWER.
BATTERY
COOLING
FAN
MOTOR-1
IGNITION SWITCH
ON or START
REFER TO THE FOLLOWING
FUSE BLOCK -
Junction Box (J/B)
DTC P1217 OVERHEAT (COOLING SYSTEM)
SR20DE
Wiring Diagram
EC-282
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