2003 NISSAN X-TRAIL check engine

ATC-2
DEFROSTER (DEF) SWITCH ............................. 27
MODE SWITCH ................................................... 27
FAN SWITCH ...................................................... 27
OFF SWITCH ...................................................... 27
FRESH (FRE) SWITCH ....................................... 27
RECIRCULATION (REC) SWITCH ..................... 27
Discharge Air Flow ................................................. 28
System Description ................................................. 29
SWITCHES AND THEIR CONTROL FUNCTION... 29
TROUBLE DIAGNOSIS ............................................ 30
How to Perform Trouble Diagnoses for Quick and
Accurate Repair ...................................................... 30
WORK FLOW ...................................................... 30
SYMPTOM TABLE .............................................. 30
Component Parts and Harness Connector Location... 31
ENGINE COMPARTMENT .................................. 31
PASSENGER COMPARTMENT .......................... 32
Circuit Diagram ....................................................... 33
WITH GASOLINE ENGINE ................................. 33
WITH DIESEL ENGINE ....................................... 34
Wiring Diagram ....................................................... 35
WITH DASOLINE ENGINE ................................. 35
WITH DIESEL ENGINE ....................................... 38
Auto Amp. Terminals and Reference Value ............ 41
PIN CONNECTOR TERMINAL LAYOUT ............ 41
AUTO AMP. INSPECTION TABLE ...................... 41
Self-diagnosis Function .......................................... 42
DESCRIPTION .................................................... 42
PROCEDURE ...................................................... 43
AUXILIARY MECHANISM: TEMPERATURE
SETTING TRIMMER ........................................... 49
AUXILIARY MECHANISM: FOOT POSITION
SETTING TRIMMER ........................................... 50
AUXILIARY MECHANISM: INLET PORT MEM-
ORY FUNCTION (FOR LHD MODELS) .............. 51
Operational Check .................................................. 51
CHECKING MEMORY FUNCTION ..................... 51
CHECKING BLOEWER ....................................... 52
CHECKING DISCHARGE AIR ............................ 52
CHECKING RECIRCULATION ............................ 52
CHECKING TEMPERATURE DECREASE ......... 53
CHECKING TEMPERATURE INCREASE .......... 53
CHECKING AUTO MODE ................................... 53
Power Supply and Ground Circuit for Auto Amp. ... 53
INSPECTION FLOW ........................................... 54
COMPONENT DESCRIPTION ............................ 54
DIAGNOSTIC PROCEDURE .............................. 55
LAN System Circuit ................................................ 56
DIAGNOSTIC PROCEDURE .............................. 56
Mode Door Motor Circuit ........................................ 58
INSPECTION FLOW ........................................... 59
SYSTEM DESCRIPTION .................................... 60
COMPONENT DESCRIPTION ............................ 61
DIAGNOSTIC PROCEDURE .............................. 61
Air Mix Door Motor Circuit ...................................... 61
INSPECTION FLOW ........................................... 62
SYSTEM DESCRIPTION .................................... 62
COMPONENT DESCRIPTION ............................ 64DIAGNOSTIC PROCEDURE ...............................64
Intake Door Motor Circuit ........................................64
INSPECTION FLOW ............................................65
SYSTEM DESCRIPTION .....................................65
COMPONENT DESCRIPTION ............................66
DIAGNOSTIC PROCEDURE ...............................67
Blower Motor Circuit ................................................67
INSPECTION FLOW ............................................68
SYSTEM DESCRIPTION .....................................69
COMPONENT DESCRIPTION ............................70
DIAGNOSTIC PROCEDURE ...............................70
COMPONENT INSPECTION ...............................73
Magnet Clutch Circuit ..............................................73
INSPECTION FLOW ............................................74
SYSTEM DESCRIPTION .....................................74
DIAGNOSTIC PROCEDURE ...............................75
COMPONENT INSPECTION ...............................80
Insufficient Cooling ..................................................81
INSPECTION FLOW ............................................82
PERFORMANCE TEST DIAGNOSES ................83
PERFORMANCE CHART ....................................84
TROUBLE DIAGNOSES FOR ABNORMAL
PRESSURE .........................................................86
Insufficient Heating .................................................89
INSPECTION FLOW ............................................90
Noise .......................................................................91
INSPECTION FLOW ............................................91
Self-diagnosis .........................................................92
INSPECTION FLOW ............................................92
Memory Function ....................................................92
INSPECTION FLOW ............................................93
Ambient Sensor Circuit ...........................................93
COMPONENT DESCRIPTION ............................93
AMBIENT TEMPERATURE INPUT PROCESS...93
DIAGNOSTIC PROCEDURE ...............................94
COMPONENT INSPECTION ...............................95
In-vehicle Sensor Circuit .........................................95
COMPONENT DESCRIPTION ............................95
DIAGNOSTIC PROCEDURE ...............................96
COMPONENT INSPECTION ...............................97
Sunload Sensor Circuit ...........................................98
COMPONENT DESCRIPTION ............................98
SUNLOAD INPUT PROCESS .............................98
DIAGNOSTIC PROCEDURE ...............................98
COMPONENT INSPECTION ............................. 100
Intake Sensor Circuit ............................................. 101
COMPONENT DESCRIPTION .......................... 101
DIAGNOSTIC PROCEDURE ............................. 101
CONTROLLER ........................................................ 104
Removal and Installation ....................................... 104
Disassembly and Assembly .................................. 104
AMBIENT SENSOR ................................................ 105
Removal and Installation ....................................... 105
IN-VEHICLE SENSOR ............................................ 106
Removal and Installation ....................................... 106
SUNLOAD SENSOR ............................................... 107
Removal and Installation ....................................... 107

ATC-3
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AT C INTAKE SENSOR CIRCUIT ................................... 108
Removal and Installation ...................................... 108
BLOWER UNIT ....................................................... 109
Removal and Installation ...................................... 109
REMOVAL ......................................................... 109
INSTALLATION ................................................. 109
Disassembly and Assembly ................................. 109
BLOWER MOTOR ................................................... 111
Removal and Installation ...................................... . 111
INTAKE DOOR MOTOR .......................................... 112
Removal and Installation ....................................... 112
FAN CONTROL AMPLIFIER ................................... 113
Removal and Installation ....................................... 113
VENTILATION AIR FILTER ..................................... 114
Removal and Installation ....................................... 114
Function ................................................................ 114
Replacement Timing ............................................. 114
Replacement Procedures ...................................... 114
HEATER & COOLING UNIT ASSEMBLY ............... 115
Removal and Installation ....................................... 115
REMOVAL .......................................................... 115
INSTALLATION .................................................. 116
Disassembly and Assembly .................................. 116
MODE DOOR MOTOR ............................................ 118
Removal and Installation ....................................... 118
AIR MIX DOOR MOTOR .......................................... 119
Removal and Installation ....................................... 119
HEATER CORE ...................................................... 120
Removal and Installation ...................................... 120
DUCTS AND GRILLES .......................................... 121
Removal and Installation ...................................... 121
Ventilator Duct, Defroster Nozzle and Defroster
Ducts .................................................................... 121
Center Ventilator Grille ......................................... 121
Side Ventilator Grille ............................................. 121
Foot Duct .............................................................. 122
Floor duct ............................................................. 122
REFRIGERANT LINES ........................................... 123
HFC-134a (R-134a) Service Procedure ............... 123
SETTING OF SERVICE TOOLS AND EQUIP-
MENT ................................................................ 123
Components ......................................................... 125
Removal and Installation for Compressor ............ 126REMOVAL .........................................................126
INSTALLATION .................................................128
Removal and Installation for Compressor Clutch . 129
REMOVAL .........................................................129
INSTALLATION .................................................132
Removal and Installation for Low-pressure flexible
hose ......................................................................135
REMOVAL .........................................................135
INSTALLATION .................................................136
Removal and Installation for High-pressure flexible
hose ......................................................................136
REMOVAL .........................................................136
INSTALLATION .................................................136
Removal and Installation for High-pressure pipe ..137
REMOVAL .........................................................137
INSTALLATION .................................................137
Removal and Installation for Refrigerant Pressure
Sensor ..................................................................137
Removal and Installation for Dual-pressure Switch.138
Removal and Installation for Condenser ..............138
REMOVAL .........................................................138
INSTALLATION .................................................138
Removal and Installation for Evaporator ..............139
REMOVAL .........................................................139
INSTALLATION .................................................139
Removal and Installation for Expansion Valve ......140
Removal and Installation for Desiccant Assembly. 140
REMOVAL .........................................................140
INSTALLATION .................................................140
Checking for Refrigerant Leaks ............................140
Checking System for Leaks Using the Fluorescent
Leak Detector .......................................................141
Dye Injection .........................................................141
Electronic Refrigerant Leak Detector ....................141
PRECAUTIONS FOR HANDLING LEAK
DETECTOR .......................................................141
CHECKING PROCEDURE ...............................142
Service Data and Specifications (SDS) ................143
COMPRESSOR ................................................143
LUBRICANT ......................................................144
REFRIGERANT .................................................144
ENGINE IDLING SPEED ..................................144
BELT TENSION .................................................144

LUBRICANT
ATC-21
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LUBRICANTPFP:KLG00
Maintenance of Lubricant Quantity in CompressorEJS000TH
The lubricant in the compressor circulates through the system with the refrigerant. Add lubricant to compres-
sor when replacing any component or after a large gas leakage occurred. It is important to maintain the speci-
fied amount.
If lubricant quantity is not maintained properly, the following malfunctions may result:
lLack of lubricant: May lead to a seized compressor
lExcessive lubricant: Inadequate cooling (thermal exchange interference)
LUBRICANT
LUBRICANT RETURN OPERATION
Adjust the lubricant quantity according to the test group shown below.
1.CHECK LUBRICANT RETURN OPERATION
Can lubricant return operation be performed?
lA/C system works properly.
lThere is no evidence of a large amount of lubricant leakage.
Ye s o r N o
Yes >>GOTO2.
No >> GO TO 3.
2.PERFORM LUBRICANT RETURN OPERATION, PROCEEDING AS FOLLOWS:
1. Start engine, and set the following conditions:
–Test condition
Engine speed: Idling to 1,200 rpm
A/C or AUTO switch: ON
Blower speed: Max. position
Temp. control: Optional [Set so that intake air temperature is 25 to 30°C (77 to 86°F).]
Intake position: Recirculation (REC)
2. Perform lubricant return operation for about 10 minutes.
3. Stop engine.
CAUTION:
If excessive lubricant leakage is noted, do not perform the lubricant return operation.
>> GO TO 3.
3.CHECK COMPRESSOR
Should the compressor be replaced?
Ye s o r N o
Ye s > > G o t oAT C - 2 2 , "LUBRICANT ADJUSTING PROCEDURE FOR COMPRESSOR REPLACE-
MENT".
No >> GO TO 4.With gasoline engine
(CWV-615M Compressor)With diesel engine
(DKV-11G Compressor)
Name Nissan A/C System Oil Type S Nissan A/C System Oil Type R
Part number KLH00-PAGS0 KLH00-PAGR0

TROUBLE DIAGNOSIS
ATC-45
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6.STEP 3 - MODE DOOR AND INTAKE DOOR POSITIONS ARE CHECKED
1. Turn the temperature dial clockwise.
2. Does code No.30 appear on the display?
Ye s o r N o
Yes >>GOTO7.
No >> GO TO 14.
7.STEP 4 - OPERATION OF EACH ACTUATOR IS CHECKED
1. Turn the temperature dial clockwise.
2. Engine running.
3. Press DEF switch, code No. of each actuator test is indicated on
the display.
>> GO TO 8.
RHA869DD
RHA495A

TROUBLE DIAGNOSIS
ATC-51
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AT C
lPress the mode switch as desired.
AUXILIARY MECHANISM: INLET PORT MEMORY FUNCTION (FOR LHD MODELS)
When ignition key is turned from OFF to ON, inlet port can be set to AUTO or manual.
Operating procedures for this trimmer are as follows:
lBegin Self-diagnosis STEP 5 mode.
lPress (fan) UP switch to set system in auxiliary mode.
lDisplay shows 61 in auxiliary mechanism.It takes approximately 3 seconds.
lPress the recirculation (REC) switch as desired.
Operational CheckEJS001GY
The purpose of the operational check is to confirm that the system operates properly.
CHECKING MEMORY FUNCTION
1. Set the temperature 90°For32°C.
2. Press OFF switch.
3. Turn the ignition switch OFF.
4. Turn the ignition switch ON.
5. Press the AUTO switch.
6. Confirm that the set temperature remains at previous tempera-
ture.
7. Press OFF switch.
If NG, go to trouble diagnosis procedure for memory functionAT C - 9 2
.
If OK, continue with next check.
RJIA0040E
LED status of REC switch Setting status Setting changeover method
ON Manual REC status is memorized.
REC SW : ON
OFF AUTO control
Conditions :Engine running and at normal operating temperature
RJIA0496E

TROUBLE DIAGNOSIS
ATC-55
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DIAGNOSTIC PROCEDURE
SYMPTOM: A/C system does not come on.
1.CHECK POWER SUPPLY CIRCUIT FOR AUTO AMP.
OK or NG
OK >> GO TO 2.
NG >> Check 10A fuses (Nos. 15, 19 and 28) located in the fuse block.
lIf fuses are OK, check for open circuit in wiring harness. Repair or replace as necessary.
lIf fuses are NG, replace fuse and check wiring harness for short circuit. Repair or replace as
necessary.
2.CHECK BODY GROUND CIRCUIT FOR AUTO AMP.
Ye s o r N o
Yes >> Replace auto amp. INSPECTION END
No >> Repair or replace harness.
RJIA0504E
Terminals Ignition switch position
(+)
(-) OFF ACC ON
ConnectorTe r m i n a l
(Wire color)
M52 1 (BR/Y)
GroundApprox.
0VApprox.
0VApprox.
12V
M522
(With gaso-
line engine:
R/B), (With
diesel
engine: L)Approx.
12VApprox.
12VApprox.
12V
M52 20 (L/W)Approx.
0VApprox.
12VApprox.
12V
RJIA0505E
Ohmmeter terminal
Continuity (+)
(-)
ConnectorTerminal (Wire
color)
M52 3 (B) Ground Yes
RJIA0506E

ATC-68
TROUBLE DIAGNOSIS
INSPECTION FLOW
*1 Self-diagnosisAT C -4 2*2 Ambient sensor circuitAT C - 9 3*3 In-vehicle sensor circuitAT C - 9 5
*4 Sunload sensor circuitAT C - 9 8*5 Air mix door motor circuitAT C - 6 1*6 Self-diagnosisAT C - 4 2,see No.13.
*7 Blower motor circuitAT C -6 7
*8 Self-diagnosisAT C -4 2*9 Operational checkAT C -5 1
*10 Symptom tableAT C -3 0*11 Operational checkAT C - 5 1*12 Intake sensor circuitATC-101
*13 With gasoline engine: Water tempera-
ture sensor ,DI-13
(LHD),DI-31
(RHD)
With diesel engine: Thermal transmit-
ter,DI-13
(LHD),DI-31(RHD)
RJIA0521E

TROUBLE DIAGNOSIS
ATC-77
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4.CHECK A/C RELAY AFTER DISCONNECTING IT
Refer toAT C - 8 0 , "
A/C Relay".
OK or NG
OK >>ReconnectA/Crelay.AndGOTO5.
NG >> 1. replace A/C relay.
2. Go to self-diagnosis step-by-step procedure:ATC-43, "
PROCEDURE"and perform self-diag-
nosis STEP-4.Confirm that magnet clutch operation is normal.
5.CHECK COIL SIDE CIRCUIT OF A/C RELAY
OK or NG
OK >> GO TO 6.
NG >> Repair harness or connector.
6.CHECK AMBIENT SENSOR
Refer toAT C - 9 3 , "
Ambient Sensor Circuit".
OK or NG
OK >>lWith gasoline engine: GO TO 7.
lWith diesel engine: GO TO 14.
NG >> Repair or replace the malfunctioning part(s).
7.CHECK REFRIGERANT PRESSURE SENSOR (QR ENGINE)
Refer toAT C - 8 0 , "
Refrigerant Pressure Sensor (With gasoline engine)".
OK or NG
OK >> GO TO 8.
NG >> Repair or replace the malfunctioning part(s).
8.CHECK VOLTAGE FOR AUTO AMP. (COMPRESSOR ON SIGNAL)
OK or NG
OK >> GO TO 9.
NG >>
lIf the voltage is approx. 4.8V when the A/C switch is
ON: Replace the auto amp.
lIf the voltage is approx. 0V when the A/C switch is OFF: GO TO 12.
Engine modelsTe r m i n a l s
Vo l ta g e (+)
(-)
ConnectorTe r m i n a l
(Wire color)
With gasoline
engineF43 26 (L)
Ground Battery voltage
With diesel
engineF34 D11 (I)
RJIA0538E
Te r m i n a l s
Condition Voltage
(+) (-)
ConnectorTerminal (Wire
color)
GroundA/C SW: ON Approx. 0V
M52 4 (L/R) A/C SW: OFF Approx. 4.8V
RJIA0539E