2001 NISSAN X-TRAIL cooling

EC-330
[QR25(WITH EURO-OBD)]
DTC P1217 ENGINE OVER TEMPERATURE
5. CHECK COOLING FAN HIGH SPEED OPERATION
Without CONSULT-II
1. Turn ignition switch “OFF”.
2. Reconnect cooling fan relays-2 and -3.
3. Turn air conditioner switch and blower fan switch “OFF”.
4. Disconnect engine coolant temperature sensor harness connector.
5. Connect 150Ω resistor to engine coolant temperature sensor harness connector.
6. Restart engine and make sure that cooling fans-1 and -2 oper-
ate 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" .)
6. CHECK COOLING SYSTEM FOR LEAK
Apply pressure to the cooling system with a tester, and check if the
pressure drops.
CAUTION:
Higher than the specified pressure may cause radiator damage.
Pressure should not drop.
OK or NG
OK >> GO TO 7.
NG >> Check the following for leak
●Hose
●Radiator
●Water pump
Refer to CO-18, "
WATER PUMP" .
7. CHECK RADIATOR CAP
Apply pressure to cap with a tester.
OK or NG
OK >> GO TO 8.
NG >> Replace radiator cap.
MEC475B
Testing pressure:157 kPa (1.57 bar, 1.6 kg/cm2 , 23
psi)
SLC754A
Radiator cap relief pressure: 59 - 98 kPa (0.59 - 0.98 bar,
0.6 - 1.0 kg/cm
2 , 9 - 14 psi)
SLC755A

EC-332
[QR25(WITH EURO-OBD)]
DTC P1217 ENGINE OVER TEMPERATURE
PROCEDURE A
1. CHECK COOLING FAN POWER SUPPLY CIRCUIT
1. Turn ignition switch “OFF”.
2. Disconnect cooling fan relay-1.
3. Turn ignition switch “ON”.
4. Check voltage between cooling fan relay-1 terminals 1, 5, 7 and
ground with CONSULT-II or tester.
OK or NG
OK >> GO TO 3.
NG >> GO TO 2.
2. DETECT MALFUNCTIONING PART
Check the following.
●10A fuse
●Fuse block (J/B) connector E103
●40A fusible links
●Harness for open or short between cooling fan relay-1 and fuse
●Harness for open or short between cooling fan relay-1 and battery
>> Repair open circuit or short to ground or short to power in harness or connectors.
3. CHECK COOLING FAN GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Disconnect cooling fan motor-1 harness connector and cooling
fan motor-2 harness connector.
3. Check harness continuity between cooling fan relay-1 terminal 3
and cooling fan motor-1 terminal 1, cooling fan motor-1 terminal
4 and body ground.
Refer to wiring diagram.
4. Also check harness for short to ground and short to power.
5. Check harness continuity between cooling fan relay-1 terminal 6
and cooling fan motor-2 terminal 1, cooling fan motor-2 terminal
4 and body ground.
Refer to wiring diagram.
6. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 4.
NG >> Repair open circuit or short to ground or short to power in harness or connectors. Voltage: Battery voltage
PBIB0577E
Continuity should exist.
Continuity should exist.
PBIB0504E

DTC P1217 ENGINE OVER TEMPERATURE
EC-333
[QR25(WITH EURO-OBD)]
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4.CHECK COOLING FAN OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal 37 and cooling fan relay-1 terminal 2.
Refer to wiring diagram.
3. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 6.
NG >> GO TO 5.
5.DETECT MALFUNCTIONING PART
Check the following.
●Harness connectors E61, F38
●Harness for open or short between cooling fan relay-1 and ECM
>> Repair open circuit or short to ground or short to power in harness or connectors.
6.CHECK COOLING FAN RELAY-1
Refer to EC-336, "
Component Inspection" .
OK or NG
OK >> GO TO 7.
NG >> Replace cooling fan relay.
7.CHECK COOLING FAN MOTORS-1 AND -2
Refer to EC-336, "
Component Inspection" .
OK or NG
OK >> GO TO 8.
NG >> Replace cooling fan motors.
8.CHECK INTERMITTENT INCIDENT
Perform EC-115, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>>INSPECTION END Continuity should exist.

EC-334
[QR25(WITH EURO-OBD)]
DTC P1217 ENGINE OVER TEMPERATURE
PROCEDURE B
1. CHECK COOLING FAN POWER SUPPLY CIRCUIT
1. Turn ignition switch “OFF”.
2. Disconnect cooling fan relays-2 and -3.
3. Turn ignition switch “ON”.
4. Check voltage between cooling fan relays-2 and -3 terminals 1,
3 and ground with CONSULT-II or tester.
OK or NG
OK >> GO TO 3.
NG >> GO TO 2.
2. DETECT MALFUNCTIONING PART
Check the following.
●10A fuse
●40A fusible links
●Harness for open or short between cooling fan relays-2 and -3 and fuse
●Harness for open or short between cooling fan relays-2 and -3 and fusible links
>> Repair harness or connectors.
3. CHECK COOLING FAN GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Disconnect cooling fan motor-1 harness connector and cooling fan motor-2 harness connector.
3. Check harness continuity between the following;
cooling fan relay-2 terminal 5 and cooling fan motor-1 terminal 2,
cooling fan relay-2 terminal 6 and cooling fan motor-1 terminal 3,
cooling fan relay-2 terminal 7 and body ground.
Refer to wiring diagram.
4. Also check harness for short to ground and short to power.
5. Check harness continuity between the following;
cooling fan relay-3 terminal 5 and cooling fan motor-2 terminal 2,
cooling fan relay-3 terminal 6 and cooling fan motor-2 terminal 3,
cooling fan relay-3 terminal 7 and body ground.
Refer to wiring diagram.
6. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 4.
NG >> Repair open circuit or short to ground or short to power in harness or connectors. Voltage: Battery voltage.
PBIB0251E
Continuity should exist.
Continuity should exist.

DTC P1217 ENGINE OVER TEMPERATURE
EC-335
[QR25(WITH EURO-OBD)]
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4.CHECK COOLING FAN OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal 27 and cooling fan relay-2 terminal 2, cooling fan relay-3
terminal 2.
Refer to wiring diagram.
3. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 6.
NG >> GO TO 5.
5.DETECT MALFUNCTIONING PART
Check the following.
●Harness connectors E61, F38
●Harness for open or short between cooling fan relays-2, -3 and ECM
>> Repair open circuit or short to ground or short to power in harness or connectors.
6.CHECK COOLING FAN RELAYS-2 AND -3
Refer to EC-336, "
COOLING FAN RELAYS-1, -2 AND -3" .
OK or NG
OK >> GO TO 7.
NG >> Replace cooling fan relays.
7.CHECK COOLING FAN MOTORS
Refer to EC-336, "
COOLING FAN MOTORS-1 AND -2" .
OK or NG
OK >> GO TO 8.
NG >> Replace cooling fan motors.
8.CHECK INTERMITTENT INCIDENT
Perform EC-115, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>>INSPECTION END
Main 12 Causes of OverheatingEBS00M96
Continuity should exist.
Engine Step Inspection item Equipment Standard Reference page
OFF 1
●Blocked radiator
●Blocked condenser
●Blocked radiator grille
●Blocked bumper
●Visual No blocking —
2
●Coolant mixture●Coolant tester 50 - 50% coolant mixture See MA-18, "Engine
Coolant Mixture Ratio" .
3
●Coolant level●Visual Coolant up to MAX level
in reservoir tank and radi-
ator filler neckSeeCO-29, "Changing
Engine Coolant" .
4
●Radiator cap●Pressure tester 59 - 98 kPa
(0.59 - 0.98 bar, 0.6 - 1.0
kg/cm
2 , 9 - 14 psi) (Limit)SeeMA-21, "
CHECKING
RADIATOR CAP" .

EC-336
[QR25(WITH EURO-OBD)]
DTC P1217 ENGINE OVER TEMPERATURE
*1: Turn the ignition switch ON.
*2: Engine running at 3,000 rpm for 10 minutes.
*3: Drive at 90 km/h (55 MPH) for 30 minutes and then let idle for 10 minutes.
*4: After 60 minutes of cool down time.
For more information, refer to CO-5, "
OVERHEATING CAUSE ANALYSIS" .
Component InspectionEBS00M97
COOLING FAN RELAYS-1, -2 AND -3
Check continuity between terminals 3 and 5, 6 and 7.
If NG, replace relay.
COOLING FAN MOTORS-1 AND -2
1. Disconnect cooling fan motor harness connectors.
2. Supply cooling fan motor terminals with battery voltage and
check operation.
Cooling fan motor should operate.
If NG, replace cooling fan motor.
ON*25●Coolant leaks●Visual No leaks See CO-29, "CHECKING
RADIATOR SYSTEM
FOR LEAKS" .
ON*
26●Thermostat●Touch the upper and
lower radiator hosesBoth hoses should be hot SeeCO-20, "THERMO-
STAT AND WATER CON-
TROL VALVE" , and CO-
11 , "RADIATOR" .
ON*
17●Cooling fan●CONSULT-II Operating See trouble diagnosis for
DTC P1217 (EC-323
).
OFF 8
●Combustion gas leak●Color checker chemical
tester 4 Gas analyzerNegative —
ON*
39●Coolant temperature
gauge●Visual Gauge less than 3/4
when driving—
●Coolant overflow to
reservoir tank●Visual No overflow during driving
and idlingSeeCO-29, "Changing
Engine Coolant" .
OFF*
410●Coolant return from
reservoir tank to radia-
tor●Visual Should be initial level in
reservoir tankSeeCO-29, "LEVEL
CHECK" .
OFF 11
●Cylinder head●Straight gauge feeler
gauge0.1 mm (0.004 in) Maxi-
mum distortion (warping)SeeEM-59, "CYLINDER
HEAD" .
12
●Cylinder block and pis-
tons●Visual No scuffing on cylinder
walls or pistonSeeEM-59, "CYLINDER
HEAD" . Engine Step Inspection item Equipment Standard Reference page
Conditions Continuity
12V direct current supply between terminals 1 and 2 Yes
No current supply No
SEF745U
SpeedTerminals
(+) (−)
Cooling fan motorLow 1 4
High 1, 2 3, 4
SEF734W

EC-412
[QR25(WITH EURO-OBD)]
REFRIGERANT PRESSURE SENSOR
REFRIGERANT PRESSURE SENSOR
PFP:92136
Component DescriptionEBS00MBM
The refrigerant pressure sensor is installed at the liquid tank of the
air conditioner system. The sensor uses an electrostatic volume
pressure transducer to convert refrigerant pressure to voltage. The
voltage signal is sent to ECM, and ECM controls cooling fan system.
ECM Terminals and Reference ValueEBS00MBN
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.
PBIB0503E
SEF099X
TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
58 B Sensors' ground[Engine is running]
●Warm-up condition
●Idle speedApproximately 0V
65 RSensor's power sup-
ply[Ignition switch “ON”]Approximately 5V
83 R/LRefrigerant pressure
sensor[Engine is running]
●Warm-up condition
●Both A/C switch and blower switch are “ON”.
(Compressor operates.)1.0 - 4.0V

ENGINE CONTROL SYSTEM
EC-443
[QR25(WITHOUT EURO-OBD)]
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System ChartEBS00NDT
*1: This sensor is not used to control the engine system under normal conditions.
*2: These signals are sent to the ECM through CAN communication line.
Multiport Fuel Injection (MFI) SystemEBS00NDU
INPUT/OUTPUT SIGNAL CHART
*1: Under normal conditions, this sensor is not for engine control operation.
SYSTEM DESCRIPTION
The amount of fuel injected from the fuel injector is determined by the ECM. The ECM controls the length of
time the valve remains open (injection pulse duration). The amount of fuel injected is a program value in the
ECM memory. The program value is preset by engine operating conditions. These conditions are determined
Input (Sensor) ECM Function Output (Actuator)
●Camshaft position sensor (PHASE)
●Crankshaft position sensor (POS)
●Mass air flow sensor
●Engine coolant temperature sensor
●Heated oxygen sensor 1
●Throttle position sensor
●Accelerator pedal position sensor
●Park/neutral position (PNP) switch
●Intake air temperature sensor
●Power steering pressure sensor
●Ignition switch
●Battery voltage
●Knock sensor
●Refrigerant pressure sensor
●Heated oxygen sensor 2 *1
●TCM (Transmission control module) *2
●Wheel sensor
●Air conditioner switch
●Electrical loadFuel injection & mixture ratio control Fuel injectors
Electronic ignition system Power transistors
Fuel pump control Fuel pump relay
On board diagnostic system MI (On the instrument panel)
Heated oxygen sensor 1 heater control Heated oxygen sensor 1 heater
Heated oxygen sensor 2 heater control Heated oxygen sensor 2 heater
Power valve control VIAS control solenoid valve
EVAP canister purge flow controlEVAP canister purge volume control
solenoid valve
Air conditioning cut control Air conditioner relay
Cooling fan control Cooling fan relays
Sensor Input Signal to ECMECM func-
tionActuator
Crankshaft position sensor (POS)
Engine speed
Piston position
Fuel injec-
tion & mix-
ture ratio
controlFuel injectors Camshaft position sensor (PHASE)
Mass air flow sensor Amount of intake air
Engine coolant temperature sensor Engine coolant temperature
Heated oxygen sensor 1 Density of oxygen in exhaust gas
Throttle position sensor Throttle position
Accelerator pedal position sensor Accelerator pedal position
Park/neutral position (PNP) switch Gear position
Ignition switch Start signal
Knock sensor Engine knocking condition
Battery Battery voltage
Power steering pressure sensor Power steering operation
Heated oxygen sensor 2 *
1Density of oxygen in exhaust gas
Wheel sensor Vehicle speed
Air conditioner switch Air conditioner operation