2005 NISSAN X-TRAIL blower

MTC-1
MANUAL AIR CONDITIONER
J AIR CONDITIONER
CONTENTS
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SECTION MTC
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MTC

MANUAL AIR CONDITIONER
PRECAUTIONS .......................................................... 2
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” .................................................................. 2
Wiring Diagrams and Trouble Diagnosis .................. 2
TROUBLE DIAGNOSIS .............................................. 3
How to Perform Trouble Diagnoses for Quick and
Accurate Repair ....................................................... 3
WORK FLOW ........................................................ 3
SYMPTOM TABLE ................................................ 3
Component Parts and Harness Connector Location ..... 4
PASSENGER COMPARTMENT ........................... 4
Discharge Air Flow ................................................... 5
Wiring Diagram —HEATER— .................................. 6
Operational Check ................................................... 7
CHECKING BLOWER ........................................... 7
CHECKING DISCHARGE AIR .............................. 7
CHECKING RECIRCULATION ............................. 7
CHECKING TEMPERATURE DECREASE .......... 8
CHECKING TEMPERATURE INCREASE ............ 8
Mode Door ............................................................... 9
INSPECTION FLOW ............................................. 9
Air Mix Door ........................................................... 10
INSPECTION FLOW ........................................... 10
Intake Door Motor Circuit ........................................ 11
INSPECTION FLOW ............................................ 11
COMPONENT DESCRIPTION ............................ 11
DIAGNOSTIC PROCEDURE FOR INTAKE
DOOR MOTOR ................................................... 12
Blower Motor Circuit ............................................... 15
INSPECTION FLOW ........................................... 15
DIAGNOSTIC PROCEDURE FOR BLOWER
MOTOR ............................................................... 16
COMPONENT INSPECTION .............................. 18
Insufficient Heating ................................................. 19
INSPECTION FLOW ........................................... 19
CONTROLLER ......................................................... 21
Removal and Installation ........................................ 21
REMOVAL ........................................................... 21INSTALLATION ................................................... 21
Disassembly and Assembly .................................... 21
BLOWER UNIT ......................................................... 22
Removal and Installation ........................................ 22
REMOVAL ........................................................... 22
INSTALLATION ................................................... 22
Disassembly and Assembly .................................... 23
BLOWER MOTOR .................................................... 24
Removal and Installation ........................................ 24
REMOVAL ........................................................... 24
INSTALLATION ................................................... 24
BLOWER FAN RESISTOR ....................................... 25
Removal and Installation ........................................ 25
REMOVAL ........................................................... 25
INSTALLATION ................................................... 25
INTAKE DOOR MOTOR ........................................... 26
Removal and Installation ........................................ 26
REMOVAL ........................................................... 26
INSTALLATION ................................................... 26
HEATER UNIT ........................................................... 27
Removal and Installation ........................................ 27
REMOVAL ........................................................... 27
INSTALLATION ................................................... 28
Disassembly and Assembly .................................... 29
HEATER CORE ......................................................... 30
Removal and Installation ........................................ 30
REMOVAL ........................................................... 30
INSTALLATION ................................................... 30
MODE DOOR ............................................................ 31
Control Linkage Adjustment ................................... 31
MODE DOOR CONTROL CABLE ....................... 31
AIR MIX DOOR ......................................................... 32
Control Linkage Adjustment ................................... 32
AIR MIX DOOR CONTROL CABLE .................... 32
DUCTS AND GRILLES ............................................. 33
Removal and Installation ........................................ 33
REMOVAL ........................................................... 33
INSTALLATION ................................................... 36

TROUBLE DIAGNOSIS
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MTC

TROUBLE DIAGNOSISPFP:00004
How to Perform Trouble Diagnoses for Quick and Accurate RepairEJS001FB
WORK FLOW
SYMPTOM TABLE
*1MTC-7, "Operational Check"
SHA900E
Symptom Reference Page
Air outlet does not change. Go to Trouble Diagnosis Procedure for Mode Door.MTC-9, "
Mode
Door"
Discharge air temperature does not change. Go to Trouble Diagnosis Procedure Air Mix Door.MTC-10, "Air Mix
Door"
Intake door does not change.
Go to Trouble Diagnosis Procedure for Intake Door Motor Circuit.MTC-11, "Intake
Door Motor Cir-
cuit"Intake door motor does not operate normally.
Blower motor operation is malfunctioning. Go to Trouble Diagnosis Procedure for Blower Motor Circuit.MTC-15, "
Blower
Motor Circuit"
Insufficient heating Go to Trouble Diagnosis Procedure for Insufficient Heating.MTC-19, "Insuffi-
cient Heating"

TROUBLE DIAGNOSIS
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Operational CheckEJS001FE
The purpose of the operational check is to confirm that the system operates properly.
CHECKING BLOWER
1. Turn fan switch to 1st-speed. Blower should operate on low
speed.
2. Then turn fan switch to 2nd-speed, and continue checking
blower speed until all speeds are checked.
3. Leave blower on Max. speed.
If NG, go to trouble diagnosis procedure for MTC-15, "
Blower Motor
Circuit" .
If OK, continue with the check.
CHECKING DISCHARGE AIR
1. Turn mode control dial to each position.
2. Confirm that discharge air comes out according to the air distri-
bution table. Refer to MTC-5, "
Discharge Air Flow" .
If NG, go to trouble diagnosis procedure for MTC-9, "
Mode Door" .
If OK, continue the check.
CHECKING RECIRCULATION
1. Press REC switch. Recirculation indicator should eliminate.
2. Press REC switch again. Recirculation indicator should not illu-
minate.
3. Listen for intake door position change (you should hear blower
sound change slightly).
If NG, go to trouble diagnosis procedure for MTC-11, "
Intake Door
Motor Circuit" .
If OK, continue the check.Conditions :Engine running at usual operating temperature
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TROUBLE DIAGNOSIS
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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".
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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-79,
"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.
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1 – Ground : Battery voltage
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2 – Ground : Continuity should exist.
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TROUBLE DIAGNOSIS
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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.
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2 – 16 : Continuity should exist.
3 – 15 : Continuity should exist.
4 – 14 : Continuity should exist.
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2 – 17 : Continuity should exist.
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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.
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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
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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
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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.
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