NISSAN X-TRAIL 2003 Service Repair Manual

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ATC-55
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Auto Amp. Terminals and Reference ValueEJS004GS
Measure voltage between each terminal and ground by following ter-
minals and reference value for auto amp.
PIN CONNECTOR TERMINAL LAYOUT
TERMINALS AND REFERENCE VALUE FOR AUTO AMP.
RJIA2824E
RJIA0489E
Te r m i -
nal No.Wire
colorItemIgnition
switchConditionVoltage
(V)
1 BR/Y Power supply for IGN ON - Battery voltage
2 L Power supply for BAT OFF - Battery voltage
3 B Ground ON - Approx. 0
4 L/R A/C (Compressor ON) signal ONCompressor: ON Approx. 0
Compressor: OFF Approx. 5
5WPower supply for each door
motorON - Battery voltage
8 P In-vehicle sensor - - -
9 R/B Ambient sensor - - -
10 OR Sunload sensor - - -
11 B Illumination ground ON Light switch: ON Approx. 0
12 R/L Power supply for illumination ON Light switch: ON Approx. 12
15 G LAN signal ON -Approx. 5.5
17 L/YFan control amp. control sig-
nalONFan speed: 1-24th Approx. 2.5 - 3.5
Fan speed: 25th Approx. 9.0
18 R Blower motor feed back ON Fan speed: 1st Approx. 8.0
19 LG/BFan ON signal (With gasoline
engine)ONBlower fan: ON Approx. 0
Blower fan: OFF Approx. 5
HAK0652D

ATC-56
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20 L/W Power supply for IGN2 ON - Battery voltage
21 GY Water temperature sensor ONAt idle [after warming up,
approx. 80°C (176°F)]
CAUTION:
The waveforms vary depend-
ing on coolant temperature
22 LG/BRear window defogger ON
signalONRear window defogger: ON Approx. 0
Rear window defogger: OFF Approx. 12
23 B/WRear window defogger feed
back signalONRear window defogger: ON Approx. 12
Rear window defogger: OFF Approx. 0
24 B/Y Sensor ground ON - Approx. 0
25 BR/Y Intake sensor - - -
28 YPower supply for ambient
temperature displayON - Approx. 5
30 PU Compressor feed back signal ON-Approx. 0
When refrigerant pressure sen-
sor connector is disconnectedApprox. 5 Te r m i -
nal No.Wire
colorItemIgnition
switchConditionVoltage
(V)
SKIA0056J

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ATC-57
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Self-diagnosis FunctionEJS004GT
DESCRIPTION
The self-diagnostic system diagnoses sensors, door motors, blower motor, etc. by system line.
Self-diagnosis is step-1 to 7. There are two ways of changing method during self-diagnosis.

Switching to self-diagnosis step-1 to 4.
Shifting from usual control to the self-diagnostic system is accomplished by starting the engine (turning
the ignition switch from OFF to ON) and pressing A/C switch for at least 5 seconds. The A/C switch must
be pressed within 10 seconds after starting the engine (ignition switch is turned ON). This system will be
canceled by either pressing intake switch or turning the ignition switch OFF. Shifting from one step to
another is accomplished be means of turning fan control dial, as required.

Switching to self-diagnosis step-5 to 7 (Auxiliary mechanism).
Shifting from usual control to the self-diagnostic system is accomplished by starting the engine (turning
the ignition switch from OFF to ON) and pressing intake switch for at least 5 seconds. The intake switch
must be pressed within 10 seconds after starting the engine (ignition switch is turned ON). This system
will be canceled by either pressing A/C switch or turning the ignition switch OFF. Shifting from one step to
another is accomplished by means of turning fan control dial, as required.

ATC-58
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RJIA2106E

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ATC-59
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FUNCTION CONFIRMATION PROCEDURE
1. SET IN SELF-DIAGNOSTIC MODE (STEP-1 TO 4)
1. Set the fan control dial to OFF position.
2. Turn ignition switch ON.
3. Set in self-diagnostic mode as follows. Within 10 seconds after starting engine (ignition switch is turned
ON.), press A/C switch for at least 5 seconds.
CAUTION:
If battery voltage drops below 12V during diagnosis step-3, actuator speed becomes slower and as a
result, the system may generate an error even when operation is usual. To avoid this, start engine
before performing this diagnosis.
>> GO TO 2.
2. STEP-1: LEDS ARE CHECKED
Check intake and A/C switch LEDs illumination.
OK >> GO TO 3.
NG >> Refer to ATC-108, "
Self-diagnosis" .
3. CHECK TO ADVANCE SELF-DIAGNOSIS STEP-2
1. Turn fan control dial to AUTO position.
CAUTION:
When switched to STEP-2, LED of REC position blinks for
approximately 25 seconds.
2. Advance to self-diagnosis STEP-2?
Check A/C switch LED illumination.
YES >> GO TO 4.
NO >> Replace controller.
4. CHECK TO RETURN SELF-DIAGNOSIS STEP-1
Turn fan control dial to OFF position.
Return to self
-diagnosis STEP-1?
YES >> GO TO 5.
NO >> Replace controller.
SJIA0389E
SJIA0390E

ATC-60
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5. STEP-2: SENSOR CIRCUITS ARE CHECKED FOR OPEN OR SHORT CIRCUIT
1. Turn fan control dial to AUTO position.
2. Turn mode control dial to AUTO position.
CAUTION:
When switched to STEP-2, LED of REC position blinks for
approximately 25 seconds.
3. Check A/C switch LED is illuminate.
OK or NG
OK >> GO TO 6.
NG >> GO TO 9.
6. STEP-3: MODE DOOR AND INTAKE DOOR POSITIONS ARE CHECKED
1. Turn fan control dial to 1st–12th speed.
2. Check A/C switch LED is illuminate.
CAUTION:
When switched to STEP-3, LED of REC position blinks for
approximately 50 seconds.
OK or NG
OK >> GO TO 7.
NG >> GO TO 10.
7. STEP-4: OPERATION OF EACH ACTUATOR IS CHECKED
1. Turn fan control dial to 13th–25th speed.
2. Change operation status of air conditioner by changing mode control dial position.
>> GO TO 8.
SJIA0391E
SJIA0392E

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ATC-61
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8. CHECK ACTUATORS
Refer to the following chart and confirm discharge air flow, air tem-
perature, blower motor voltage and compressor operation.
Checks must be made visually, by listening to any noise, or by touching air outlets with your hand, etc. for
improper operation.
*1: Step No. 41 to 46 are for differentiation and will not be displayed.
*2: FOOT position during automatic control. Refer to AT C - 6 3 , "
AUXILIARY MECHANISM: FOOT POSITION
SETTING TRIMMER" .
OK or NG
OK >> 1. Turn ignition switch OFF or intake switch ON.
2. INSPECTION END
NG >>

Air outlet does not change.
Go to Mode Door Motor Circuit. Refer to AT C - 7 3 , "
Mode Door Motor Circuit" .

Intake door does not change.
Go to Intake Door Motor Circuit. Refer to AT C - 7 9 , "
Intake Door Motor Circuit" .

Blower motor operation is malfunctioning.
Go to Blower Motor Circuit. Refer to AT C - 8 2 , "
Blower Motor Circuit" .

Magnet clutch does not engage.
Go to Magnet Clutch Circuit. Refer to AT C - 8 8 , "
Magnet Clutch Circuit" .

Discharge air temperature does not change.
Go to Air Mix Door Motor Circuit. Refer to AT C - 7 6 , "
Air Mix Door Motor Circuit" .
RJIA0492E
Mode control dial position
STEP-No.
*1STEP-41 STEP-42 STEP-43 STEP-44 STEP-45 STEP-46
Mode control dial posi-
tionAUTO VENT B/LFOOT or
FOOT2D/F or D/F2 DEF
Mode door position VENT VENT B/L
FOOT
*2D/F DEF
Intake door position REC REC REC FRE FRE FRE
Air mix door position FULL COLD FULL COLD FULL COLD FULL HOT FULL HOT FULL HOT
Blower motor voltage Approx. 4.5V Approx. 10.5V Approx. 8.5V Approx. 8.5V Approx. 8.5V Approx. 12V
Compressor ON ON OFF OFF ON ON

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9. CHECK MALFUNCTIONING SENSOR
Refer to the following chart.
*1: Perform self-diagnosis STEP-2 under sunshine.
When performing indoors, aim a light (more than 60W) at sunload
sensor, otherwise LED of A/C switch will not indicate despite that
sunload sensor is functioning properly.
CAUTION:
When switched to STEP-2, LED of REC position blinks for
approximately 25 seconds.
*2: ATC-109, "
DIAGNOSTIC PROCEDURE FOR AMBIENT SENSOR" .
*3: AT C - 11 2 , "
DIAGNOSTIC PROCEDURE FOR IN-VEHICLE SENSOR" .
*4: AT C - 11 4 , "
DIAGNOSTIC PROCEDURE FOR SUNLOAD SENSOR" .
*5: AT C - 11 7 , "
DIAGNOSTIC PROCEDURE FOR INTAKE SENSOR" .
*6: AT C - 6 9 , "
DIAGNOSTIC PROCEDURE FOR LAN CIRCUIT" .
>> INSPECTION END
10. CHECK MALFUNCTIONING DOOR MOTOR POSITION SWITCH
Mode and/or intake door motor position switch(es) is/are malfunc-
tioning.
CAUTION:
When switched to STEP-3, LED of REC position blinks for
approximately 50 seconds.
*1: AT C - 7 5 , "
DIAGNOSTIC PROCEDURE FOR MODE DOOR
MOTOR" .
*2: AT C - 8 1 , "
DIAGNOSTIC PROCEDURE FOR INTAKE DOOR MOTOR" .
>> INSPECTION END
SJIA0393E
Mode control dial position Unusual Malfunctioning sensor (Including circuits) Reference page
VENT
A/C LED: OFFAmbient sensor *2
B/L In-vehicle sensor *3
FOOT or FOOT2
Sunload sensor
*1*4
D/F or D/F2 Intake sensor *5
DEF Air mix door motor (LCU) PBR *6
Unusual Mode or intake door position Reference page
REC LED: ON Mode door motor *1
FRE LED: ON Intake door motor *2
SJIA0394E

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ATC-63
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AUXILIARY MECHANISM: TEMPERATURE SETTING TRIMMER
The trimmer compensates for differences in range of ±3°C between temperature setting (Temperature control
dial position) and temperature felt by driver.
Operating procedures for this trimmer are as follows:
1. Set temperature at 25°C.
2. Set fan control dial to OFF.
3. Turn ignition switch ON.
4. Set in self-diagnostic mode as follows. Within 10 seconds after starting engine (ignition switch is turned
ON.), press intake switch for at least 5 seconds.
5. Turn temperature control dial as desired. Temperature will change at a rate of 1°C each time a dial is
turned.
When battery cable is disconnected, trimmer operation is canceled. Temperature set becomes that of initial
condition, i.e. 0°C.
AUXILIARY MECHANISM: FOOT POSITION SETTING TRIMMER
Wind distribution ratio in FOOT mode can be set.
Operating procedures for this trimmer are as follows:
1. Set temperature at 25°C.
2. Set fan control dial to AUTO.
3. Turn ignition switch ON.
4. Set in self-diagnostic mode as follows. Within 10 seconds after starting engine (ignition switch is turned
ON.), press intake switch for at least 5 seconds.
5. Turn temperature control dial as desired.
Setting temperatureLED status of each switch
FRE REC A/C
−3°CON ON ON
−2°CON ON OFF
−1°CON OFF ON
0°C (Initial setting) OFF OFF OFF
1°COFFOFF ON
2°COFF ON OFF
3°C OFF ON ON
RJIA2825E

ATC-64
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AUXILIARY MECHANISM: INLET PORT MEMORY FUNCTION
When ignition switch is turned from OFF to ON, inlet port can be set to AUTO or manual.
Operating procedures for this trimmer are as follows:
1. Set fan control dial to 1st-25th speed.
2. Turn ignition switch ON.
3. Set in self-diagnostic mode as follows. Within 10 seconds after starting engine (ignition switch is turned
ON.), press intake switch for at least 5 seconds.
4. Press intake switch as desired.
Ty p eLED status of each switch
FRE REC A/C
Type-A (initial setting) OFF OFF ON
Ty p e - B O F F O N OF F
Ty p e - C O F F O N O N
Ty p e - D ON O F F OF F
LED status
of FRE
positionLED status
of REC posi-
tionSetting status
Setting changeover method
FRE REC
OFF OFF AUTO control AUTO control
Intake SW: ON OFF ON AUTO control (Initial setting)Manual REC status is memorized.
(Initial setting)
ON OFF Manual FRE status is memorized. AUTO control
ON ON Manual FRE status is memorized. Manual REC status is memorized.