NISSAN X-TRAIL 2003 Electronic Repair Manual

TROUBLE DIAGNOSIS
ATC-43
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Additionally shifting from STEP 5 to AUXILIARY MECHANISM is accomplished by means of pushing (fan)
UP switch.
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.
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ATC-44
TROUBLE DIAGNOSIS
2.STEP 1 - LEDS AND DISPLAY ARE CHECKED
Check LEDs illuminate and display screen.
Ye s o r N o
Yes >>GOTO3.
No >> 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?
Ye s o r N o
Yes >>GOTO4.
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?
Ye s o r N o
Yes >>GOTO5.
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?
Ye s o r N o
Yes >>GOTO6.
No >> GO TO 13.
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RHA970DB

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.
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RHA495A

ATC-46
TROUBLE DIAGNOSIS
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 >>
lAir outlet does not change.
Go to Mode Door MotorAT C - 5 8
.
lIntake door does not change.
Go to Intake Door MotorAT C - 6 4
.
lBlower motor operation is malfunctioning.
Go to Blower MotorAT C - 6 7
.
lMagnet clutch does not engage.
Go to Magnet ClutchAT C - 7 3
.
lDischarge air temperature does not change.
Go to Air Mix Door MotorAT C - 6 1
.
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.
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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 HOT FULL 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
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TROUBLE DIAGNOSIS
ATC-47
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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 Ambient Sensor CircuitAT C - 1 0 5
.
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 In-vehicle Sensor CircuitATC-106
.
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 Intake Sensor CircuitAT C - 1 0 8
.
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ATC-48
TROUBLE DIAGNOSIS
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:AT C - 1 0 5
.
*3:AT C - 1 0 6
.
*4:AT C - 1 0 8
.
*5:AT C - 1 0 7
*6:AT C - 6 1
>> 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
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TROUBLE DIAGNOSIS
ATC-49
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14.CHECK MALFUNCTIONING DOOR MOTOR POSITION SWITCH
Mode or (and) intake door motor position switch(es) is (are) malfunctioning.
(If two or more mode or intake doors are out of order, corresponding code numbers blink respectively two
times.)
*1:If mode door motor harness connector is disconnected, the following display pattern will appear.
31®32®33®34®35®36®Return to 31
*2:If intake door motor harness connector is disconnected, the following display pattern will appear.
37®38®39®Return to 37
*3:AT C - 5 8
*4:AT C - 6 4
>> INSPECTION END
AUXILIARY MECHANISM: TEMPERATURE SETTING TRIMMER
The trimmer compensates for differences in range of±3°C(±6°F) between temperature setting (displayed
digitally) and temperature felt by driver.
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.
lTurn the temperature dial as desired. Temperature will change at a rate of 1°C(2°F)eachtimeadial is
turned.
Code No. *1 *2 Mode or intake door position Reference page
31 VENT
Mode door motor *3 32 B/L
34 FOOT
35 D/F
36 DEF
37 FRE
Intake door motor *4 38 20% FRE
39 REC
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ATC-50
TROUBLE DIAGNOSIS
When battery cable is disconnected, trimmer operation is canceled. Temperature set becomes that of initial
condition, i.e. 0°C(0°F).
AUXILIARY MECHANISM: FOOT POSITION SETTING TRIMMER
Wind distribution ratio in Foot mode can be set.
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.
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TROUBLE DIAGNOSIS
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.
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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
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ATC-52
TROUBLE DIAGNOSIS
CHECKING BLOEWER
1. Press fan switch (up side) one time.Blower should operate on
low speed.The fan symbol should have one blade lit .
2. Press fan switch (up side) one more time, and continue check-
ing blower speed and fan symbol until all speeds are checked.
3. Leave blower on MAX speed.
If NG, go to trouble diagnosis procedure for blower motorAT C - 6 7
.
If OK, continue with next check.
CHECKING DISCHARGE AIR
1. Press mode switch four times and DEF button.
2. Each position indicator should change shape.
3. Confirm that discharge air comes out according to the air distri-
bution table.Refer to Discharge Air FlowAT C - 2 8
.
Intake door position is checked in the next step.
If NG, go to trouble diagnosis procedure for intake door motorAT C -
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If OK, continue with next check.
NOTE:
Confirm that the compressor clutch is engaged (visual inspection)
and intake door position is at FRESH when the DEF is selected.
CHECKING RECIRCULATION
1. Press recirculation (REC) switch one time. Recirculation indica-
tor should illuminate.
2. Listen for intake door position change (you should hear blower
sound change slightly).
If NG, go to trouble diagnosis procedure for intake motor doorAT C -
64.
If OK, continue with next check.
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