NISSAN X-TRAIL 2003 Service Repair Manual

TROUBLE DIAGNOSIS
MTC-13
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MTC

4. CHECK POWER SUPPLY FOR INTAKE DOOR MOTOR
1. Reconnect heater control panel connector.
2. Turn ignition switch ON.
3. Check voltage between intake door motor harness connector M48 terminal 1 (Y/R: RHD models, R/W:
LHD models) and 2 (R/W: RHD models, L/R: LHD models).
OK or NG
OK >> Replace intake door motor.
NG >> GO TO 5.
ModelTerminals
Condition Voltage (+) (-)
Intake door motor
connectorTerminal No.
(wire color)Intake door motor
connectorTerminal No.
(wire color)
RHD
modelsM482 (R/W)
M481 (Y/R) REC SW: ON
Approx. 12V
1 (Y/R) 2 (R/W) REC SW: OFF
LHD
modelsM481 (R/W)
M482 (Y/R) REC SW: ON
Approx. 12V
2 (Y/R) 1 (R/W) REC SW: OFF
RJIA2847E

MTC-14
TROUBLE DIAGNOSIS

5. CHECK CIRCUIT CONTINUITY BETWEEN HEATER CONTROL PANEL AND INTAKE DOOR MOTOR
1. Turn ignition switch OFF.
2. Disconnect heater control panel connector and intake door motor connector.
3. Check continuity between heater control panel harness connector M55 terminal 10 (R/W) and intake door
motor harness connector M48 terminal 2 (R/W: RHD models) or 1 (R/W: LHD models).
4. Check continuity between heater control panel harness connector M55 terminal 11 (Y/R) and intake door
motor harness connector M48 terminal 1 (Y/R: RHD models) or 2 (Y/R: LHD models).
OK or NG
OK >> Replace heater control panel.
NG >> Repair harness or connector.
Te r m i n a l s
Continuity Heater control panel connec-
torIntake door motor connector
ConnectorTerminal No.
(wire color)ConnectorTerminal No.
(wire color)
M55 10 (R/W) M48 2 (R/W): RHD models
Ye s 1 (R/W): LHD models
M55 11 (Y/R) M48 1 (Y/R): RHD models
2 (Y/R): LHD models
RJIA3145E

TROUBLE DIAGNOSIS
MTC-15
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MTC

Blower Motor CircuitEJS001FI
SYMPTOM: Blower motor operation is malfunctioning.
INSPECTION FLOW
*1MTC-16, "DIAGNOSTIC PROCE-
DURE FOR BLOWER MOTOR".*2MTC-7, "
Operational Check".*3MTC-3, "SYMPTOM TABLE".
*4MTC-7, "
Operational Check".
RJIA0601E

MTC-16
TROUBLE DIAGNOSIS

DIAGNOSTIC PROCEDURE FOR BLOWER MOTOR
SYMPTOM: Blower motor operation is malfunctioning.
1. CHECK POWER SUPPLY FOR BLOWER MOTOR
1. Disconnect blower motor connector.
2. Turn ignition switch ON.
3. Check voltage between blower motor harness connector M65
terminal 1 (L/W) and ground.
OK or NG
OK >> GO TO 2.
NG >> Check power supply circuit and 15A fuses [Nos. 19 and
24, located in the fuse block (J/B)]. Refer to PG-75,
"FUSE BLOCK - JUNCTION BOX (J/B)" .

If OK, check harness for open circuit. Repair or replace if necessary.

If NG, replace fuse and check harness for short circuit. Repair or replace if necessary.
2. CHECK GROUND CIRCUIT FOR BLOWER MOTOR
1. Turn ignition switch OFF.
2. Turn fan switch to 1-speed.
3. Check continuity between blower motor harness connector M65
terminal 2 (L/B) and ground.
OK or NG
OK >> GO TO 3.
NG >> GO TO 4.
3. CHECK BLOWER MOTOR
Refer to MTC-18, "
Blower Motor" .
OK or NG
OK >> INSPECTION END
NG >> Replace blower motor.
RJIA0602E
1 – Ground : Battery voltage
RJIA2929E
2 – Ground : Continuity should exist.
RJIA2930E

TROUBLE DIAGNOSIS
MTC-17
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MTC

4. CHECK CIRCUIT CONTINUITY BETWEEN BLOWER MOTOR AND FAN RESISTOR
1. Disconnect fan resistor connector.
2. Check continuity between fan resistor harness connector M66
terminal 1 (L/B) and blower motor harness connector M65 termi-
nal 2 (L/B).
OK or NG
OK >> GO TO 5.
NG >> Repair harness or connector.
5. CHECK FAN RESISTOR
Refer to MTC-18, "
Fan Resistor" .
OK or NG
OK >> GO TO 6.
NG >> Replace fan resistor.
6. CHECK CIRCUIT CONTINUITY BETWEEN FAN RESISTOR AND HEATER CONTROL PANEL
1. Disconnect heater control panel connector.
2. Check continuity between fan resistor harness connector M66
terminal 2 (L/R), 3 (L/Y) or 4 (L/W) and heater control panel har-
ness connector M54 terminal 14 (L/W), 15 (L/Y) or 16 (L/R).
OK or NG
OK >> GO TO 7.
NG >> Repair harness or connector.
7. CHECK CIRCUIT CONTINUITY BETWEEN BLOWER MOTOR AND HEATER CONTROL PANEL
Check continuity between blower motor harness connector M65 ter-
minal 2 (L/B) and heater control panel harness connector M54 termi-
nal 17 (L/B).
OK or NG
OK >> GO TO 8.
NG >> Repair harness or connector.
8. CHECK FAN SWITCH
Refer to MTC-18, "
Fan Switch" .
OK or NG
OK >> GO TO 9.
NG >> Replace fan switch.1 – 2 : Continuity should exist.
RJIA2931E
2 – 16 : Continuity should exist.
3 – 15 : Continuity should exist.
4 – 14 : Continuity should exist.
RJIA2932E
2 – 17 : Continuity should exist.
RJIA2933E

MTC-18
TROUBLE DIAGNOSIS

9. CHECK GROUND CIRCUIT
Check continuity between heater control panel harness connector
M54 terminal 13 (B) and ground.
OK or NG
OK >> INSPECTION END
NG >> Repair harness or connector.
COMPONENT INSPECTION
Blower Motor
Confirm smooth rotation of the blower motor.

Ensure that there are no foreign particles inside the intake unit.
Fan Switch
Check continuity between heater control connector M54 terminals at
each switch position.
Fan Resistor
Check resistance between fan resister connector M66 terminals.13 – Ground : Continuity should exist.
RJIA2934E
RJIA0609E
Switch position Terminals Continuity
OFF 13 - 14, 15, 16, 17 No
1 13 - 14
Ye s 2 13 - 15
3 13 - 16
4 13 - 17
RJIA0610E
TerminalsResistance (Ω)
LHD RHD
12 0.25 - 0.31 0.28 - 0.34
3 0.58 - 0.70 0.79 - 0.97
4 1.33 - 1.63 1.84 - 2.24
RJIA0611E

TROUBLE DIAGNOSIS
MTC-19
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MTC

Insufficient HeatingEJS001FJ
SYMPTOM: Insufficient heating
INSPECTION FLOW
SJIA0482E

MTC-20
TROUBLE DIAGNOSIS

*1 QR engine; CO-9, "Changing Engine
Coolant" or YD engine; CO-31,
"Changing Engine Coolant" .*2 QR engine; CO-13, "
Checking Radi-
ator Cap" or YD engine; CO-35,
"Checking Radiator Cap" .*3 QR engine; (WITH EURO-OBD) EC-
162, "DTC P0117, P0118 ECT SEN-
SOR" .
QR engine; (WITHOUT EURO-OBD)
EC-597, "
DTC P0117, P0118 ECT
SENSOR" .
YD engine; (WITH EURO-OBD) EC-
981, "DTC P0117, P0118 ECT SEN-
SOR" .
YD engine; (WITHOUT EURO-OBD)
EC-1291, "
DTC P0117, P0118 ECT
SENSOR" .
*4 QR engine; CO-9, "
Changing Engine
Coolant" or YD engine; CO-31,
"Changing Engine Coolant" .*5 MTC-7, "
Operational Check" .*6MTC-3, "SYMPTOM TABLE".

CONTROLLER
MTC-21
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CONTROLLERPFP:27500
Removal and InstallationEJS004HA
REMOVAL
1. Remove mode control cable and air mix control cable from heater unit. Refer to MTC-31, "MODE DOOR"
and MTC-32, "AIR MIX DOOR" .
2. Remove cluster lid C. Refer to IP-11, "
Removal and Installation" .
3. Remove mounting screws from heater control panel.
4. Remove heater control panel, and then remove heater control
panel connector.
INSTALLATION
Installation is basically the reverse order of removal.
Disassembly and AssemblyEJS004HB
RJIA0089E
1. Mode door cable 2. Clamp 3. Case assembly
4. Heater panel 5. Finisher 6. Dial
7. Air mix door cable 8. Fan switch 9. Bulb
RJIA3153E

MTC-22
BLOWER UNIT

BLOWER UNITPFP:27200
Removal and InstallationEJS004YB
REMOVAL
1. Remove glove box assembly.
2. Remove glove box cover, instrument passenger lower panel and instrument reinforcement. Refer to IP-11,
"Removal and Installation" .
3. Remove ECM with ECM bracket attached.
4. Remove instrument panel mounting screw.
5. Remove blower unit mounting bolt and screw.
6. Disconnect blower motor connector and fan resistor connector.
7. Disconnect intake door motor connector and harness clips.
8. Remove blower unit.
CAUTION:
Slide the blower unit toward the right, remove location pins
(2 pieces), then move it downward.
INSTALLATION
Installation is basically the reverse order of removal.
CAUTION:

Make sure location pins (2 pieces) are securely installed.
RJIA3161E