engine NISSAN X-TRAIL 2003 Electronic Repair Manual

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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

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ATC-51
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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

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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

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ATC-69
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SYSTEM DESCRIPTION
Component Parts
Fan speed control system components are:
lAuto amp.
lA/C LAN system (PBR built-in air mix door motor, mode door motor and intake door motor)
lFan control amp.
lIn-vehicle sensor
lAmbient sensor
lSunload sensor
lIntake sensor
System Operation
Automatic Mode
In the automatic mode, the blower motor speed is calculated by the automatic amplifier based on input from
the PBR, in-vehicle sensor, sunload sensor, intake sensor and ambient sensor.
The blower motor applied voltage ranges from approximately 4 volts (lowest speed) to 12 volts (highest
speed).
The control blower speed (in the range of 4 to 12V), the automatic amplifier supplies a gate voltage to the fan
control amplifier. Based on this voltage, the fan control amplifier controls the voltage supplied to the blower
motor.
Starting Fan Speed Control
Start Up From COLD SOAK Condition (Automatic mode)
In a cold start up condition where the engine coolant temperature is below 56°C (133°F), the blower will not
operate for a short period of time (up to 150 seconds). The exact start delay time varies depending on the
ambient and engine coolant temperature.
In the most extreme case (very low ambient) the blower starting delay will be 150 seconds as described
above. After this delay, the blower will operate at low speed until the engine coolant temperature rises above
56°C (133°F), at which time the blower speed will increase to the objective speed.
Start Up From Normal or HOT SOAK Condition (Automatic mode)
The blower will begin operation momentarily after the A/C button is pushed. The blower speed will gradually
rise to the objective speed over a time period of 3 seconds or less (actual time depends on the objective
blower speed).
Blower Speed Compensation
Sunload
SHA006FD

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ATC-75
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Low Temperature Protection Control (With Gasoline Engine)
Auto amplifier will turn the compressor ON or OFF as determined by
a signal detected by ambient sensor.
When ambient temperatures are greater than -2°C(28°F), the com-
pressor turns ON. The compressor turns OFF when ambient temper-
atures are less than -5°C(23°F).
Evaporator Freeze Protection Control (With Diesel Engine)
Auto amplifier will turn the compressor ON or OFF as determined by
a signal detected by intake sensor.
When intake temperatures are greater than 4°C(39°F), the com-
pressor turns ON. The compressor turns OFF when intake tempera-
tures are less than 2.5°C (36.5°F).
DIAGNOSTIC PROCEDURE
SYMPTOM: Magnet clutch does not engage when A/C switch is ON.
RHA094GB
RJIA0534E
RJIA0535E

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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

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ATC-79
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12.CHECK CIRCUIT CONTINUITY BETWEEN ECM AND AUTO AMP. (QR ENGINE)
Disconnect ECM connector and auto amp. connector.
OK or NG
OK >> CheckEC-634, "REFRIGERANT PRESSURE SEN-
SOR"in ECM.
NG >> Repair harness or connector.
13.CHECK CIRCUIT CONTINUITY BETWEEN ECM AND AUTO AMP. (QR ENGINE)
Disconnect ECM connector and auto amp. connector.
OK or NG
OK >> CheckEC-634, "REFRIGERANT PRESSURE SEN-
SOR"in ECM.
NG >> Repair harness or connector.
14.CHECK VOLTAGE FOR AUTO AMP. (COMPRESSOR ON SIGNAL)
OK or NG
OK >> INSPECTION END.
NG >> GO TO 15.
15.CHECK DUAL- PRESSURE SWITCH (YD ENGINE)
Refer toAT C - 8 1 , "
Dual-pressure Switch (With diesel engine)".
OK or NG
OK >> GO TO 16.
NG >> Replace the dual-pressure switch.
Te r m i n a l s
Continuity ECM Auto amp.
ConnectorTerminal (Wire
color)ConnectorTerminal (Wire
color)
F43 44 (L/R) M52 4 (L/R) Yes
RJIA0543E
Te r m i n a l s
Continuity ECM connector Auto amp. connector
ConnectorTerminal (Wire
color)ConnectorTerminal (Wire
color)
F43 30 (PU/W) M53 30 (PU/W) Yes
RJIA0544E
Te r m i n a l s
Condition Voltage (+)
(-)
ConnectorTe r m i n a l
(Wire color)
M52 4 (L/R) GroundA/C SW: ON Approx. 0V
A/C SW: OFFApprox.
4.8V
RJIA0539E

ATC-80
TROUBLE DIAGNOSIS
16.CHECK CIRCUIT CONTINUITY BETWEEN AUTO AMP. AND DUAL-PRESSURE SWITCH
Disconnect the auto amp. connector.
OK or NG
OK >> GO TO 17.
NG >> Repair harness or connector.
17.CHECK CIRCUIT CONTINUITY BETWEEN DUAL-PRESSURE SWITCH AND ECM
Disconnect the ECM connector.
OK or NG
OK >> CheckEC-824, "AIR CONDITIONER CONTROL"in the
ECM.
NG >> Repair harness or connector.
COMPONENT INSPECTION
A/C Relay
Check continuity between terminal Nos. 3 and 5.
If NG, replace relay.
Refrigerant Pressure Sensor (With gasoline engine)
The refrigerant pressure sensor is attached to the liquid tank (con-
denser).
Te r m i n a l s
Continuity Auto amp. Dual-pressure switch
ConnectorTerminal (Wire
color)ConnectorTerminal (Wire
color)
M52-4 (L/R) 4 (L/R) E40-2 (L/R) 2 (L/R) Yes
RJIA0545E
Te r m i n a l s
Continuity Dual-pressure switch connector ECM connector
ConnectorTerminal (Wire
color)ConnectorTerminal (Wire
color)
E40 1 (PU/W) F34-D 23 (PU/W) Yes
RJIA0546E
Conditions Continuity
12V direct current supply between terminal Nos. 1
and 2Ye s
No current supply No
RHA638H
RJIA0547E

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ATC-81
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Dual-pressure Switch (With diesel engine)
Thermal Protector (With diesel engine)
Check continuity between compressor harness terminal and field
coil.
Insufficient CoolingEJS001H6
SYMPTOM: Insufficient cooling
Compressor: ON
KPa (bar, kg/cm2,psi)Compressor: OFF
KPa (bar, kg/cm2,psi)
Low-pressure side 186 (1.86, 1.9, 27) 177 (1.77, 1.8, 26)
High-pressure side 1,569 (15.7, 16, 228) 2,746 (27.5, 28, 398)
RJIA0548E
RHA671H