2001 NISSAN X-TRAIL cooling

EC-108
[QR25(WITH EURO-OBD)]
TROUBLE DIAGNOSIS
*1: These items are not applied for M/T models.
*2: Accelerator pedal position sensor 2 signal and throttle position sensor 2 signal are converted by ECM internally. Thus, they differ
from ECM terminals voltage signal.INT/V TIM (B1)
●Engine: After warming up
●Shift lever: N
●Air conditioner switch: OFF
●No-loadIdle−5° - 5°CA
When revving engine up to 2,000 rpm
quicklyApprox. 0° - 20°CA
INT/V SOL (B1)
●Engine: After warming up
●Shift lever: N
●Air conditioner switch: OFF
●No-loadIdle 0% - 2%
When revving engine up to 2,000 rpm
quicklyApprox. 0% - 50%
VIAS S/V
●Engine: After warming upIdle OFF
More than 5,000 rpm ON
AIR COND RLY
●Engine: After warming up, idle
the engineAir conditioner switch: OFF OFF
Air conditioner switch: ON
(Compressor operates)ON
FUEL PUMP RLY
●For 1 seconds after turning ignition switch ON
●Engine running or crankingON
●Except above conditions OFF
THRTL RELAY
●Ignition switch: ON ON
COOLING FAN
●Engine: After warming up, idle
the engine
●Air conditioner switch: OFFEngine coolant temperature is 94°C
(201°F) or lessOFF
Engine coolant temperature is
between 95°C (203°F) and 104°C
(219°F)LOW
Engine coolant temperature is 105°C
(221°F) or moreHIGH
HO2S1 HTR (B1)
●Engine: After warming up
●Engine speed: Below 3,600 rpmON
●Engine speed: Above 3,600 rpm OFF
HO2S2 HTR (B1)
●Engine speed: Below 3,600 rpm after the following conditions are met.
●Engine: After warming up
●Keeping the engine speed between 3,500 and 4,000 rpm for one minute
and at idle for one minute under on loadON
●Engine speed: Above 3,600 rpm OFF
TRVL AFTER MIL
●Ignition switch: ONVehicle has traveled after MI has
turned ON.0 - 65,535 km
(0 - 40,723 mile)
AC PRESS SEN
●Ignition switch: ON (Engine stopped) Approx. 0V
●Engine: Idle
●Air conditioner switch: OFF1.0 - 4.0V
CAN COMM*
1
●Ignition switch: ONOK
CAN CIRC 1*
1OK
CAN CIRC 2*
1OK
CAN CIRC 3*
1UNKWN
CAN CIRC 4*
1UNKWN
CAN CIRC 5*
1UNKWN MONITOR ITEM CONDITION SPECIFICATION

EC-150
[QR25(WITH EURO-OBD)]
DTC P0117, P0118 ECT SENSOR
DTC Confirmation Procedure
EBS00M2Q
NOTE:
If “DTC Confirmation Procedure” has been previously conducted, always turn ignition switch “OFF” and wait at
least 10 seconds before conducting the next test.
WITH CONSULT-II
1. Turn ignition switch “ON”.
2. Select “DATA MONITOR” mode with CONSULT-II.
3. Wait at least 5 seconds.
4. If DTC is detected, go to EC-152, "
Diagnostic Procedure" .
WITH GST
Follow the procedure “WITH CONSULT-II” above.
Detected items Engine operating condition in fail-safe mode
Engine coolant temper-
ature sensor circuitEngine coolant temperature will be determined by ECM based on the time after turning ignition switch “ON”
or “START”.
CONSULT-II displays the engine coolant temperature decided by ECM.
ConditionEngine coolant temperature decided
(CONSULT-II display)
Just as ignition switch is turned ON or Start 40°C (104°F)
More than approx. 4 minutes after ignition ON or
Start80°C (176°F)
Except as shown above40 - 80°C (104 - 176°F)
(Depends on the time)
When the fail-safe system for engine coolant temperature sensor is activated, the cooling fan operates
while engine is running.
SEF058Y

DTC P1217 ENGINE OVER TEMPERATURE
EC-323
[QR25(WITH EURO-OBD)]
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EC
DTC P1217 ENGINE OVER TEMPERATUREPFP:00000
System DescriptionEBS00M8Z
COOLING FAN CONTROL
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 3-step control [HIGH/LOW/OFF].
OPERATION
CONSULT-II Reference Value in Data Monitor ModeEBS00M90
Specification data are reference values.
Sensor Input Signal to PCMECM func-
tionActuator
Wheel sensor Vehicle speed
Cooling
fan controlCooling 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
PBIB0576E
MONITOR ITEM CONDITION SPECIFICATION
AIR COND SIG
●Engine: After warming up, idle
the engineAir conditioner switch: OFF OFF
Air conditioner switch: ON
(Compressor operates.)ON

EC-324
[QR25(WITH EURO-OBD)]
DTC P1217 ENGINE OVER TEMPERATURE
ECM Terminals and Reference Value
EBS00M91
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.
On Board Diagnosis LogicEBS00M92
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-29, "
Changing Engine
Coolant" . Also, replace the engine oil. Refer to LU-19, "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-18, "
Engine Coolant Mixture Ratio" .
2. After refilling coolant, run engine to ensure that no water-flow noise is emitted.
COOLING FAN
●Engine: After warming up, idle
the engine
●Air conditioner switch: OFFEngine coolant temperature is 94°C
(201°F) or lessOFF
Engine coolant temperature is
between 95°C (203°F) and 104°C
(219°F)LOW
Engine coolant temperature is 105°C
(221°F) or moreHIGH MONITOR ITEM CONDITION SPECIFICATION
TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
27 LG/BCooling fan relay
(High)[Engine is running]
●Cooling fan is not operating
●Cooling fan is operating at low speedBATTERY VOLTAGE
(11 - 14V)
[Engine is running]
●Cooling fan is operating at high speed0 - 1.0V
37 LYCooling fan relay
(Low)[Engine is running]
●Cooling fan is not operatingBATTERY VOLTAGE
(11 - 14V)
[Engine is running]
●Cooling fan is operating0 - 1.0V
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P1217
1217Engine over tempera-
ture (Overheat)
●Cooling fan does not operate properly (Over-
heat).
●Cooling fan system does not operate prop-
erly (Overheat).
●Engine coolant was not added to the system
using the proper filling method.
●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-335,
"Main 12 Causes of Overheating" .

DTC P1217 ENGINE OVER TEMPERATURE
EC-325
[QR25(WITH EURO-OBD)]
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EC
Overall Function CheckEBS00M93
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-328,
"Diagnostic Procedure" .
2. Confirm whether customer filled the coolant or not. If customer
filled the coolant, skip the following steps and go to EC-328,
"Diagnostic Procedure" .
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-328, "
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-328,
"Diagnostic Procedure" .
2. Confirm whether customer filled the coolant or not. If customer
filled the coolant, skip the following steps and go to EC-328,
"Diagnostic Procedure" .
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 operating.
Be careful not to overheat engine.
SEF621W
SEF646X
SEF621W

EC-326
[QR25(WITH EURO-OBD)]
DTC P1217 ENGINE OVER TEMPERATURE
8. Make sure that cooling fan operates at low speed.
If NG, go to EC-328, "
Diagnostic Procedure" .
If OK, go to the following step.
9. Turn ignition switch “OFF”.
10. Turn air conditioner switch and blower fan switch “OFF”.
11. Disconnect engine coolant temperature sensor harness connector.
12. Connect 150Ω resistor to engine coolant temperature sensor harness connector.
13. Restart engine and make sure that cooling fan operates at
higher speed than low speed.
Be careful not to overheat engine.
14. If NG, go to EC-328, "
Diagnostic Procedure" .
SEC163BA
MEC475B

EC-328
[QR25(WITH EURO-OBD)]
DTC P1217 ENGINE OVER TEMPERATURE
Diagnostic Procedure
EBS00M95
1. INSPECTION START
Do you have CONSULT-II?
Ye s o r N o
Yes >> GO TO 2.
No >> GO TO 4.
2. CHECK COOLING FAN LOW SPEED OPERATION
With CONSULT-II
1. Disconnect cooling fan relays-2 and -3.
2. Turn ignition switch “ON”.
3. Perform “COOLING FAN” in “ACTIVE TEST” mode with CONSULT-II.
4. Make sure that cooling fans-1 and -2 operate at low speed.
OK or NG
OK >> GO TO 3.
NG >> Check cooling fan low speed control circuit. (Go to EC-332, "
PROCEDURE A" .)
PBIB0505E
SEF784Z

DTC P1217 ENGINE OVER TEMPERATURE
EC-329
[QR25(WITH EURO-OBD)]
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EC
3.CHECK COOLING FAN HIGH SPEED OPERATION
With CONSULT-II
1. Turn ignition switch “OFF”.
2. Reconnect cooling fan relays-2 and -3.
3. Turn ignition switch “ON”.
4. Perform “COOLING FAN” in “ACTIVE TEST” mode with CON-
SULT-II.
5. Make sure that cooling fans-1 and -2 operate at higher speed
than low speed.
OK or NG
OK >> GO TO 6.
NG >> Check cooling fan high speed control circuit. (Go to EC-
334, "PROCEDURE B" .)
4.CHECK COOLING FAN LOW SPEED OPERATION
Without CONSULT-II
1. Disconnect cooling fan relays-2 and -3.
2. Start engine and let it idle.
3. Set temperature lever at full cold position.
4. Turn air conditioner switch “ON”.
5. Turn blower fan switch “ON”.
6. Make sure that cooling fans-1 and -2 operate at low speed.
OK or NG
OK >> GO TO 5.
NG >> Check cooling fan low speed control circuit. (Go to EC-
332, "PROCEDURE A" .)
SEF785Z
PBIB0505E
SEC163BA