2001 NISSAN X-TRAIL sensor

ATC-44
TROUBLE DIAGNOSIS
Auto Amp. Terminals and Reference Value
EJS001GW
Measure voltage between each terminal and ground by following
AUTO AMP. INSPECTION TABLE.
PIN CONNECTOR TERMINAL LAYOUT
AUTO AMP. INSPECTION TABLE
RJIA0488E
RJIA0489E
TERMI-
NAL NO.ITEM CONDITIONVo l ta g e
(V)
1 Power supply for IGNIGN
ON-Approx. 12
2 Power supply for BATIGN
OFF-Approx. 12
3GroundIGN
ON-Approx. 0
4 Compressor ON signalIGN
ONCompressor: ON Approx. 0
Compressor: OFF Approx. 4.8
5Power supply for mode
door motor, air mix door
motor, intake door motorIGN
ON-Approx. 12
8 In-vehicle sensor - - -
9Ambient sensor - - -
10 Sunload sensor - - -
11 Illumination ground IGN
ONLight switch: ON Approx. 0
12Power supply for illumina-
tionIGN
ONLight switch: ON Approx. 12
15 LAN signalIGN
ON-Approx. 0
HAK0652D

TROUBLE DIAGNOSIS
ATC-45
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17Fan control amp. control
signalIGN
ONFan speed: 1st, 2nd, 3rd, 4th Approx. 2.5 - 3.5
Fan speed: 5th Approx. 9.0
18 Blower motor feed backIGN
ONFan speed: 1st Approx. 8.0
19 Fan ON signalIGN
ONBlower fan: ON Approx. 0
Blower fan: OFF Approx. 4.8
20 Power supply for ACCIGN
ON-Approx. 12
21With gasoline engine:
Water temperature sensorIGN
ONAt idle (after warming up, approx. 80°C)
CAUTION:
The waveforms vary depending on cool-
ant temperature
With diesel engine:
Thermal transmitterIGN
ONWater temperature: 56°C Approx. 5.67 - 7.01
24 Sensor groundIGN
ON-Approx. 0
25 Intake sensor - - -
30Compressor feed back sig-
nal (With gasoline engine)IGN
ON-Approx. 0
Disconnect the refrigerant pressure sensor
connectorApprox. 5 TERMI-
NAL NO.ITEM CONDITIONVo l ta g e
(V)
SKIA0056J

ATC-46
TROUBLE DIAGNOSIS
Self-diagnosis Function
EJS001GX
DESCRIPTION
The self-diagnostic system diagnoses sensors, door motors, blower motor, etc. by system line. Refer to appli-
cable sections (items) for details. Shifting from normal control to the self-diagnostic system is accomplished by
starting the engine (turning the ignition switch from OFF to ON) and pressing OFF switch for at least 5 sec-
onds. The "OFF" 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 temperature dial, as required.
Additionally shifting from STEP 5 to AUXILIARY MECHANISM is accomplished by means of pushing (fan)
UP switch.
RJIA0490E

TROUBLE DIAGNOSIS
ATC-47
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PROCEDURE
1.SET IN SELF-DIAGNOSTIC MODE
1. Turn ignition switch ON.
2. Set in self-diagnostic mode as follows. Within 10 seconds after starting engine (ignition switch is turned
ON.), press OFF switch for at least 5 seconds.
>> GO TO 2.
2.STEP 1 - LEDS AND DISPLAY ARE CHECKED
Check LEDs illuminate and display screen.
OK or NG
OK >> GO TO 3.
NG >> Malfunctioning OFF switch or LEDs.
>> Replace A/C auto amp.
3.CHECK TO ADVANCE SELF-DIAGNOSIS STEP 2
1. Turn the temperature dial clockwise.
2. Advance to self-diagnosis STEP 2?
YES or NO
YES >> GO TO 4.
NO >> Malfunctioning temperature dial.
>> Replace A/C auto amp.
4.CHECK TO RETURN SELF-DIAGNOSIS STEP 1
1. Turn the temperature dial counterclockwise.
2. Return to self-diagnosis STEP 1?
YES or NO
YES >> GO TO 5.
NO >> Malfunctioning temperature dial.
>> Replace A/C auto amp.
5.STEP 2 - SENSOR CIRCUITS ARE CHECKED FOR OPEN OR SHORT CIRCUIT
1. Turn the temperature dial clockwise.
2. Does code No.20 appear on the display?
YES or NO
YES >> GO TO 6.
NO >> GO TO 13.
RJIA0491E
RHA970DB

TROUBLE DIAGNOSIS
ATC-49
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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.
OK or NG
OK >> GO TO 9.
NG >>
●Air outlet does not change.
Go to ATC-62, "
Mode Door Motor Circuit" .
●Intake door does not change.
Go to ATC-68, "
Intake Door Motor Circuit" .
●Blower motor operation is malfunctioning.
Go to ATC-70, "
Blower Motor Circuit" .
●Magnet clutch does not engage.
Go to ATC-78, "
Magnet Clutch Circuit" .
●Discharge air temperature does not change.
Go to ATC-64, "
Air Mix Door Motor Circuit" .
9.STEP 5 - TEMPERATURE OF EACH SENSOR IS CHECKED
1. Turn the temperature dial clockwise.
2. Code No.51 appears on the display.
>> GO TO 10.
RJIA0492E
41 42 43 44 45 46
Mode door position VENT B/L B/L FOOT D/F DEF
Intake door position REC REC 20% FRE FRE FRE FRE
Air mix door position FULL COLD FULL COLD FULL HOT FULL HOT FULL HOTFULL HOT
Blower fan Approx. 4.5V Approx. 10.5V Approx. 8.5V Approx. 8.5V Approx. 8.5V Approx. 12V
Compressor ON ON OFF OFF ON ON
RHA359H

ATC-50
TROUBLE DIAGNOSIS
10. CHECK AMBIENT SENSOR
Press (DEF) switch one time, temperature detected by ambient
sensor is indicated on the display.
NOTE:
If temperature shown on display greatly differs from actual tempera-
ture, check sensor circuit first, then inspect sensor.
OK or NG
OK >> GO TO 11.
NG >> Go to ATC-100, "
Ambient Sensor Circuit" .
11 . CHECK IN-VEHICLE SENSOR
Press (DEF) switch the second time, temperature detected by in-
vehicle sensor is indicated on the display.
NOTE:
If temperature shown on display greatly differs from actual tempera-
ture, check sensor circuit first, then inspect sensor.
OK or NG
OK >> GO TO 12.
NG >> Go to ATC-102, "
In-vehicle Sensor Circuit" .
12. CHECK INTAKE SENSOR
Press (DEF) switch the third time, temperature detected by intake
sensor is indicated on the display.
NOTE:
If temperature shown on display greatly differs from actual tempera-
ture, check sensor circuit first, then inspect sensor.
OK or NG
OK >> 1. Turn ignition switch OFF or (AUTO) switch ON.
2. END
NG >> Go to ATC-108, "
Intake Sensor Circuit" .
RHA551H
RHA552H
RJIA1944E

TROUBLE DIAGNOSIS
ATC-51
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13.CHECK MALFUNCTIONING SENSOR
Refer to the following chart for malfunctioning code No.
(If two or more sensors malfunction, corresponding code Nos. blink respectively two times.)
*1:Conduct self-diagnosis STEP 2 under sunshine.
When conducting indoors, aim a light (more than 60W) at sunload sensor, otherwise Code No.25 will indicate
despite that sunload sensor is functioning properly.
*2: ATC-100, "
Ambient Sensor Circuit" .
*3: ATC-102, "
In-vehicle Sensor Circuit" .
*4: ATC-108, "
Intake Sensor Circuit" .
*5: ATC-105, "
Sunload Sensor Circuit" .
*6: AT C - 6 4 , "
Air Mix Door Motor Circuit" .
>> INSPECTION END
Code No. Malfunctioning sensor (Including circuits) Reference page
21 / -21 Ambient sensor *2
22 / -22 In-vehicle sensor *3
24 / -24 Intake sensor *4
25 / -25 Sun-load sensor *5
26 / -26 Air mix door motor (LCU) PBR *6
RJIA0493E

TROUBLE DIAGNOSIS
ATC-57
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AT C
Power Supply and Ground Circuit for Auto Amp.EJS001GZ
SYMPTOM: A/C system does not come on.
INSPECTION FLOW
COMPONENT DESCRIPTION
Automatic Amplifier (Auto Amp.)
The auto amplifier has a built-in microcomputer which processes
information sent from various sensors needed for air conditioner
operation. The air mix door motor, mode door motor, intake door
motor, blower motor and compressor are then controlled.
The auto amplifier is unitized with control mechanisms. Signals from
various switches and Potentio Temperature Control (PTC) are
directly entered into auto amplifier.
Self-diagnostic functions are also built into auto amplifier to provide
quick check of malfunctions in the auto air conditioner system.
Potentio Temperature Control (PTC)
The PTC is built into the A/C auto amp. It can be set at an interval of
0.5°C in the 18°C to 32°C temperature range by turning the temper-
ature dial. The set temperature is displayed.
*1AT C - 5 7 , "Power Supply and Ground
Circuit for Auto Amp.".*2AT C - 5 4 , "
Operational Check".*3AT C - 4 4 , "Auto Amp. Terminals and
Reference Value".
RJIA1945E
RJIA0488E
RJIA0488E