2001 NISSAN X-TRAIL check engine

ATC-96
TROUBLE DIAGNOSIS
*10 QR25 engine; (WITH EURO-OBD)
EC-153, "
ENGINE COOLANT TEM-
PERATURE SENSOR" .
QR25 engine; (WITHOOUT EUR-
OBD)EC-527, "
ENGINE COOLANT
TEMPERATURE SENSOR" .
QR20 engine; (WITH EURO-OBD)
EC-885, "
ENGINE COOLANT TEM-
PERATURE SENSOR" .
QR20 engine; (WITHOUT EURO-
OBD)EC-1213, "
ENGINE COOLANT
TEMPERATURE SENSOR" .
YD engine; EC-1508, "
SYSTEM
DESCRIPTION" .*11 QR engine; CO-9, "
Changing Engine
Coolant" .
YD engine; CO-29, "
Changing
Engine Coolant" .*12 QR engine; CO-9, "
Changing Engine
Coolant" .
YD engine; CO-29, "
Changing
Engine Coolant" .
*13 QR engine; CO-12, "
Checking Radi-
ator Cap" .
YD engine; CO-33, "
Checking Radi-
ator Cap" .

ATC-98
TROUBLE DIAGNOSIS
Self-diagnosis
EJS001H9
Symptom: Self-diagnosis cannot be performed.
INSPECTION FLOW
*1ATC-135, "Removal and Installation
for Compressor Clutch".*2ATC-138, "
Inspection".*3AT C - 2 4 , "Maintenance of Lubricant
Quantity in Compressor".
*4ATC-54, "
Operational Check".*5QR engine; EM-12, "Checking Drive
Belts" .
YD engine; EM-118, "
Checking Drive
Belts" .
*1ATC-57, "
Power Supply and Ground
Circuit for Auto Amp.".*2AT C - 1 0 0 , "
Ambient Sensor Circuit".*3ATC-102, "In-vehicle Sensor Circuit".
*4ATC-105, "
Sunload Sensor Circuit".*5ATC-108, "Intake Sensor Circuit".*6AT C - 6 4 , "Air Mix Door Motor Circuit".
*7ATC-54, "
Operational Check".*8ATC-33, "SYMPTOM TABLE".*9AT C - 5 4 , "Operational Check".
RJIA1949E

ATC-100
TROUBLE DIAGNOSIS
Ambient Sensor Circuit
EJS001HB
COMPONENT DESCRIPTION
Ambient Sensor
The ambient sensor is attached on the hood lock stay. It detects
ambient temperature and converts it into a resistance value which is
then input into the auto amplifier.
AMBIENT TEMPERATURE INPUT PROCESS
The automatic amplifier includes a processing circuit for the ambient sensor input. However, when the temper-
ature detected by the ambient sensor increases quickly, the processing circuit retards the auto amp. function.
It only allows the auto amp. to recognize an ambient temperature increase of 0.33°C (0.6°F) per 100 seconds.
As an example, consider stopping for a cup of coffee after high speed driving. Although the actual ambient
temperature has not changed, the temperature detected by the ambient sensor will increase. This is because
the heat from the engine compartment can radiate to the front grille area, location of the ambient sensor.
DIAGNOSTIC PROCEDURE
SYMPTOM: Ambient sensor circuit is open or shorted. (21 or -21 is
indicated on auto amp. As a result of conducting Self-diagnosis
STEP 2.)
1. CHECK VOLTAGE BETWEEN AMBIENT SENSOR HARNESS CONNECTOR AND GROUND
Disconnect ambient sensor harness connector.
OK or NG
OK >> GO TO 2.
NG >> GO TO 4.
RJIA0048E
RHA051GD
Terminals
Voltage (+)
(-)
ConnectorTerminal (Wire
color)
E38 1 (L/OR) Ground Approx. 5V
RJIA1950E

TROUBLE DIAGNOSIS
ATC-109
C
D
E
F
G
H
I
K
L
MA
B
AT C
1.CHECK INTAKE SENSOR CIRCUIT BETWEEN INTAKE SENSOR AND BODY GROUND
Disconnect intake sensor harness connector.
OK or NG
OK >> GO TO 2.
NG >> GO TO 4.
2.CHECK INTAKE SENSOR CIRCUIT BETWEEN INTAKE SENSOR AND AUTO AMP. (LCU)
Disconnect auto amp. (LCU) harness connector.
OK or NG
OK >> GO TO 3.
NG >> Repair harness or connector.
Engine modelTerminals
Vo l ta g e (+)
(-)
ConnectorTe r m i n a l ( W i r e
color)
With gasoline
engineM68 1 (BR/Y)
Ground Approx. 5V
With diesel engine M69 1 (BR/Y)
RJIA0568E
Engine modelTerminals
Continuity Intake sensor Auto amp.
ConnectorTe r m i n a l ( W i r e
color)ConnectorTerminal (Wire
color)
With gasoline
engineM68 2 (B/Y)
M5324 (B/Y)
Ye s
With diesel engine M69 2 (B/Y) 24 (B/Y)
RJIA0569E

ATC-110
TROUBLE DIAGNOSIS
3. CHECK INTAKE SENSOR
Refer to ATC-108, "
Intake Sensor"
OK or NG
OK >> 1. Replace auto amp.
2. Go to self-diagnosis AT C - 4 7 , "
PROCEDURE" and perform self-diagnosis STEP-2. Confirm
that code No. 20 is displayed.
NG >> 1. Replace intake sensor.
2. Go to self-diagnosis AT C - 4 7 , "
PROCEDURE" and perform self-diagnosis STEP-2. Confirm
that code No. 20 is displayed.
4. CHECK INTAKE SENSOR CIRCUIT BETWEEN INTAKE SENSOR AND AUTO AMP. (LCU)
Disconnect auto amp. (LCU) harness connector.
OK or NG
OK >> 1. Replace auto amp.
2. Go to self-diagnosis AT C - 4 7 , "
PROCEDURE" and perform self-diagnosis STEP-2. Confirm
that code No. 20 is displayed.
NG >> Repair harness or connector.
Engine modelTerminals
Continuity Intake sensor Auto amp.
Connector Terminal (Wire
colorConnectorTerminal (Wire
color)
With gasoline
engineM68 1 (BR/Y)
M5325 (BR/Y)
Ye s
With diesel engine M69 1 (BR/Y) 25 (BR/Y)
RJIA0570E

ATC-134
REFRIGERANT LINES
6. Remove the mounting bolts from compressor.
7. Remove the compressor from the lower side of the vehicle.
INSTALLATION
CAUTION:
●Replace the O-ring of the low-pressure flexible hose and
high-pressure flexible hose with a new one, then apply
compressor oil to it when installing it.
●When pouring refrigerant, check for leaks.
RJIA0021E
RJIA0580E
RJIA0023E
RJIA0581E
Bolts mounting the compressor (With gasoline engine)
Tightening torque : 28.4 - 33.3 N-m (2.9 - 3.4 kg-m, 21 - 24 ft- lb)
Bolts mounting the compressor (With diesel engine)
Tightening torque : 60 - 69 N-m (6.1 - 7.1 kg-m, 45 - 51 ft- lb)
Nut (bolt) mounting the high-pressure flexible hose
Tightening torque : 8 - 18 N-m (0.8 - 1.9 kg-m, 70 - 164 in-lb)
Nut (bolt) mounting the low-pressure flexible hose
Tightening torque : 8 - 18 N-m (0.8 - 1.9 kg-m, 70 - 164 in-lb)

ATC-138
REFRIGERANT LINES
Inspection
Clutch disc
If the contact surface shows signs of damage due to excessive heat,
replace clutch disc and pulley.
Pulley
Check the appearance of the pulley assembly. If the contact surface
of pulley sows signs of excessive grooving, replace clutch disc and
pulley. The contact surfaces of the pulley assembly should be
cleaned with a suitable solvent before reinstallation.
Coil
Check coil for loose connection or cracked insulation.
INSTALLATION
With Gasoline Engine (CWV-615M Compressor)
1. Install the field coil.
Be sure to align the coil's pin with the hole in the compressor's
front head.
2. Install the field coil harness clip using a screwdriver.
3. Install the pulley assembly using the installer and a hand press,
and then install the snap ring using snap ring pliers.
RJIA0582E
RJIA0583E
RHA142E
RHA143EA

REFRIGERANT LINES
ATC-139
C
D
E
F
G
H
I
K
L
MA
B
AT C
4. Install the clutch disc on the drive shaft, together with the original
shim(s). Press the clutch disc down by hand.
5. Using the holder to prevent clutch disc rotation.
After tightening the bolt, check that the pulley rotates smoothly.
6. Check clearance around the entire periphery of clutch disc.
If the specified clearance is not obtained, replace adjusting
spacer and readjust.
With Diesel Engine (DKV-11G Compressor)
1. Install the field coil.
Be sure to align the coil's pin with the hole in the compressor's
front head.
2. Install the field coil harness clip using a screwdriver.
RHA127F
Tightening torque : 14 N-m (1.4 kg-m, 10 ft-lb)
RHA086E
Disc to pulley clear-
ance: 0.3 - 0.6 mm (0.012 - 0.024 in)
RHA087E
RHA076C