heating NISSAN X-TRAIL 2001 Service Workshop Manual

ATC-2
DEFROSTER (DEF) SWITCH ............................. 30
MODE SWITCH ................................................... 30
FAN SWITCH ...................................................... 30
OFF SWITCH ...................................................... 30
FRESH (FRE) SWITCH ....................................... 30
RECIRCULATION (REC) SWITCH ..................... 30
Discharge Air Flow ................................................. 31
System Description ................................................. 32
SWITCHES AND THEIR CONTROL FUNCTION ... 32
TROUBLE DIAGNOSIS ............................................ 33
How to Perform Trouble Diagnoses for Quick and
Accurate Repair ...................................................... 33
WORK FLOW ...................................................... 33
SYMPTOM TABLE .............................................. 33
Component Parts and Harness Connector Location ... 34
ENGINE COMPARTMENT .................................. 34
PASSENGER COMPARTMENT .......................... 35
Circuit Diagram ....................................................... 36
WITH GASOLINE ENGINE ................................. 36
WITH DIESEL ENGINE ....................................... 37
Wiring Diagram ....................................................... 38
WITH GASOLINE ENGINE ................................. 38
WITH DIESEL ENGINE ....................................... 41
Auto Amp. Terminals and Reference Value ............ 44
PIN CONNECTOR TERMINAL LAYOUT ............ 44
AUTO AMP. INSPECTION TABLE ...................... 44
Self-diagnosis Function .......................................... 46
DESCRIPTION .................................................... 46
PROCEDURE ...................................................... 47
AUXILIARY MECHANISM: TEMPERATURE
SETTING TRIMMER ........................................... 52
AUXILIARY MECHANISM: FOOT POSITION
SETTING TRIMMER ........................................... 53
AUXILIARY MECHANISM: INLET PORT MEM-
ORY FUNCTION (FOR LHD MODELS) .............. 54
Operational Check .................................................. 54
CHECKING MEMORY FUNCTION ..................... 54
CHECKING BLOWER ......................................... 55
CHECKING DISCHARGE AIR ............................ 55
CHECKING RECIRCULATION ............................ 55
CHECKING TEMPERATURE DECREASE ......... 56
CHECKING TEMPERATURE INCREASE .......... 56
CHECKING AUTO MODE ................................... 56
Power Supply and Ground Circuit for Auto Amp. ... 57
INSPECTION FLOW ........................................... 57
COMPONENT DESCRIPTION ............................ 57
DIAGNOSTIC PROCEDURE .............................. 58
LAN System Circuit ............................................. ... 59
DIAGNOSTIC PROCEDURE .............................. 59
Mode Door Motor Circuit ........................................ 62
INSPECTION FLOW ........................................
... 62
SYSTEM DESCRIPTION .................................... 63
COMPONENT DESCRIPTION ............................ 64
DIAGNOSTIC PROCEDURE .............................. 64
Air Mix Door Motor Circuit ...................................... 64
INSPECTION FLOW ........................................... 65
SYSTEM DESCRIPTION .................................... 66
COMPONENT DESCRIPTION ............................ 66
DIAGNOSTIC PROCEDURE .............................. 67Intake Door Motor Circuit ........................................ 68
INSPECTION FLOW ............................................ 68
SYSTEM DESCRIPTION ..................................... 69
COMPONENT DESCRIPTION ............................ 69
DIAGNOSTIC PROCEDURE ............................... 70
Blower Motor Circuit ................................................ 70
INSPECTION FLOW ............................................ 71
SYSTEM DESCRIPTION ..................................... 72
COMPONENT DESCRIPTION ............................ 74
DIAGNOSTIC PROCEDURE ............................... 74
COMPONENT INSPECTION ............................... 77
Magnet Clutch Circuit .............................................. 78
INSPECTION FLOW ............................................ 78
SYSTEM DESCRIPTION ..................................... 79
DIAGNOSTIC PROCEDURE ............................... 79
COMPONENT INSPECTION ............................... 84
Insufficient Cooling .................................................. 86
INSPECTION FLOW ............................................ 86
PERFORMANCE TEST DIAGNOSES ................ 88
PERFORMANCE CHART .................................... 90
TROUBLE DIAGNOSES FOR UNUSUAL PRES-
SURE ................................................................... 92
Insufficient Heating ................................................. 95
INSPECTION FLOW ............................................ 95
Noise ....................................................................... 97
INSPECTION FLOW ............................................ 97
Self-diagnosis ......................................................... 98
INSPECTION FLOW ............................................ 98
Memory Function .................................................... 99
INSPECTION FLOW ............................................ 99
Ambient Sensor Circuit .........................................100
COMPONENT DESCRIPTION ..........................100
AMBIENT TEMPERATURE INPUT PROCESS .100
DIAGNOSTIC PROCEDURE .............................100
COMPONENT INSPECTION .............................102
In-vehicle Sensor Circuit .......................................102
COMPONENT DESCRIPTION ..........................102
DIAGNOSTIC PROCEDURE .............................103
COMPONENT INSPECTION .............................104
Sunload Sensor Circuit .........................................105
COMPONENT DESCRIPTION ..........................105
SUNLOAD INPUT PROCESS ...........................105
DIAGNOSTIC PROCEDURE .............................105
COMPONENT INSPECTION .............................107
Intake Sensor Circuit .............................................108
COMPONENT DESCRIPTION ..........................108
DIAGNOSTIC PROCEDURE .............................108
CONTROLLER ........................................................ 111
Removal and Installation .......................................111
Disassembly and Assembly ..................................111
AMBIENT SENSOR ................................................112
Removal and Installation .......................................112
IN-VEHICLE SENSOR ............................................113
Removal and Installation .......................................113
SUNLOAD SENSOR ...............................................114
Removal and Installation .......................................114
INTAKE SENSOR CIRCUIT ....................................115
Removal and Installation .......................................115
BLOWER UNIT ........................................................116

TROUBLE DIAGNOSIS
ATC-33
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AT C
TROUBLE DIAGNOSISPFP:00004
How to Perform Trouble Diagnoses for Quick and Accurate RepairEJS001GS
WORK FLOW
SYMPTOM TABLE
*1AT C - 5 4 , "Operational Check"
SHA900E
Symptom Reference Page
A/C system does not come on. Go to Trouble Diagnosis Procedure for A/C system.ATC-57, "
Power
Supply and
Ground Circuit for
Auto Amp."
Air outlet does not change.
Go to Trouble Diagnosis Procedure for Mode Door Motor. (LAN)AT C - 6 2 , "Mode
Door Motor Cir-
cuit"Mode door motor does not operate normally.
Discharge air temperature does not change.
Go to Trouble Diagnosis Procedure for Air Mix Door Motor. (LAN)ATC-64, "
Air Mix
Door Motor Cir-
cuit"Air mix door motor does not operate nor-
mally.
Intake door does not change.
Go to Trouble Diagnosis Procedure for Intake Door Motor.(LAN)AT C - 6 8 , "
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.ATC-70, "
Blower
Motor Circuit"Blower motor operation is malfunctioning
under out of starting fan speed control.
Magnet clutch does not engage. Go to Trouble Diagnosis Procedure for Magnet Clutch.AT C - 7 8 , "
Magnet
Clutch Circuit"
Insufficient cooling. Go to Trouble Diagnosis Procedure for Insufficient Cooling.AT C - 8 6 , "Insuffi-
cient Cooling"
Insufficient heating. Go to Trouble Diagnosis Procedure for Insufficient Heating.AT C - 9 5 , "Insuffi-
cient Heating"
Noise. Go to Trouble Diagnosis Procedure for Noise.ATC-97, "Noise"
Self-diagnosis cannot be performed. Go to Trouble Diagnosis Procedure for Self-diagnosis.AT C - 9 8 , "Self-
diagnosis"
Memory function does not operate. Go to Trouble Diagnosis Procedure for Memory Function.AT C - 9 9 , "Memory
Function"

ATC-56
TROUBLE DIAGNOSIS
CHECKING TEMPERATURE DECREASE
1. Turn the temperature dial until 18°C is displayed.
2. Check for cold air at discharge air outlets.
If NG, go to AT C - 8 6 , "
Insufficient Cooling" .
If OK, continue with next check.
CHECKING TEMPERATURE INCREASE
1. Turn the temperature dial until 32°C is displayed.
2. Check for hot air at discharge air outlets.
If NG, go to AT C - 9 5 , "
Insufficient Heating" .
If OK, continue with next check.
CHECKING AUTO MODE
1. Press A/C switch.
2. Display should indicate AUTO (no ECON).
●Confirm that the compressor clutch engages (sound or visual
inspection). (Discharge air and blower speed will depend on
ambient, in-vehicle, and set temperatures.)
If NG, go to AT C - 5 7 , "
Power Supply and Ground Circuit for Auto
Amp." , then if necessary, go to AT C - 7 8 , "Magnet Clutch Circuit" .
If all operational check are OK (symptom cannot be duplicated), go
to Incident Simulation Tests in GI-23, "
How to Perform Efficient Diag-
nosis for an Electrical Incident" and perform tests as outlined to
simulate driving conditions environment. If symptom appears, refer
to AT C - 3 3 , "
SYMPTOM TABLE" and perform applicable trouble
diagnosis procedures, refer to ATC-47, "
PROCEDURE" .
RJIA0500E
RJIA0501E
RJIA0502E

TROUBLE DIAGNOSIS
ATC-95
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AT C
Insufficient HeatingEJS001H7
SYMPTOM: Insufficient heating
INSPECTION FLOW
*1ATC-54, "Operational Check".*2ATC-47, "PROCEDURE", see No. 1. *3AT C - 4 7 , "PROCEDURE", see No. 5.
*4ATC-47, "
PROCEDURE", see No. 7. *5ATC-64, "Air Mix Door Motor Circuit".*6AT C - 4 7 , "PROCEDURE", see No.
14.
*7ATC-59, "
LAN System Circuit".*8ATC-70, "Blower Motor Circuit".*9AT C - 6 4 , "Air Mix Door Motor Circuit".
RJIA0550E

MTC-1
MANUAL AIR CONDITIONER
J AIR CONDITIONER
CONTENTS
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SECTION
A
B
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
Air Mix Door ........................................................... 10
Intake Door Motor Circuit ........................................ 11
INSPECTION FLOW ............................................ 11
COMPONENT DESCRIPTION ............................ 11
DIAGNOSTIC PROCEDURE .............................. 12
Blower Motor Circuit ............................................... 14
INSPECTION FLOW ........................................... 14
DIAGNOSTIC PROCEDURE .............................. 15
COMPONENT INSPECTION .............................. 17
Insufficient Heating ................................................. 18
INSPECTION FLOW ........................................... 18CONTROLLER .......................................................... 20
Removal and Installation ........................................ 20
Disassembly and Assembly .................................... 20
BLOWER MOTOR .................................................... 21
Removal and Installation ........................................ 21
BLOWER FAN RESISTOR ....................................... 22
Removal and Installation ........................................ 22
INTAKE DOOR MOTOR ........................................... 23
Removal and Installation ........................................ 23
HEATER UNIT ........................................................... 24
Removal and Installation ........................................ 24
REMOVAL ........................................................... 24
INSTALLATION ................................................... 25
Disassembly and Assembly .................................... 25
HEATER CORE ......................................................
... 26
Removal and Installation ........................................ 26
MODE DOOR ............................................................ 27
Control Linkage adjustment .................................... 27
MODE DOOR CONTROL CABLE ....................... 27
AIR MIX DOOR ......................................................... 28
Control Linkage Adjustment ................................... 28
AIR MIX DOOR CONTROL CABLE .................... 28
DUCTS AND GRILLES ............................................. 29
Removal and Installation ........................................ 29
VENTILATOR DUCT, DEFROSTER NOZZLE
AND DEFROSTER DUCTS ................................ 29
CENTER VENTILATOR GRILLE ......................... 29
SIDE VENTILATOR GRILLE ............................... 29
FOOT DUCT ....................................................... 30
FLOOR DUCT ..................................................... 30

TROUBLE DIAGNOSIS
MTC-3
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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-27
Discharge air temperature does not change. Go to Trouble Diagnosis Procedure Air Mix Door.MTC-28
Intake door does not change.
Go to Trouble Diagnosis Procedure for Intake Door Motor.MTC-11
Intake door motor does not operate normally.
Blower motor operation is malfunctioning. Go to Trouble Diagnosis Procedure for Blower Motor.MTC-14
Insufficient heating. Go to Trouble Diagnosis Procedure for Insufficient Heating.MTC-18

MTC-8
TROUBLE DIAGNOSIS
CHECKING TEMPERATURE DECREASE
1. Turn the temperature dial to full cold position.
2. Check for cold air at discharge air outlets.
If NG, go to trouble diagnosis procedure for air mix door.
If OK, continue with next check.
CHECKING TEMPERATURE INCREASE
1. Turn the temperature dial to full hot position.
2. Check for hot air at discharge air outlets.
If NG, go to trouble diagnosis procedure for MTC-18, "
Insufficient
Heating" .
If all operational check are OK (symptom can not be duplicated), go
to Incident Simulation Tests in GI-23, "
How to Perform Efficient Diag-
nosis for an Electrical Incident" and perform tests as outlined to
simulate driving conditions environment. If symptom appears, refer
to MTC-3, "
SYMPTOM TABLE" and perform applicable trouble
diagnosis procedures.
RJIA0590E
RJIA0591E

MTC-18
TROUBLE DIAGNOSIS
Insufficient Heating
EJS001FJ
SYMPTOM: Insufficient heating
INSPECTION FLOW
RJIA0612E