Nissan Murano Z50 (2003 year). Manual — part 6

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ATC-59

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ATC

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PASSENGER COMPARTMENT

RJIA1757E

ATC-60

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Schematic

AJS000Z0

TJWA0048E

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ATC-61

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ATC

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Wiring Diagram —A/C—

AJS000Z1

TJWA0049E

ATC-62

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TJWA0050E

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ATC-63

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ATC

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TJWA0051E

ATC-64

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TJWA0052E

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ATC-65

C

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ATC

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TJWA0053E

ATC-66

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Auto Amp. Terminals and Reference Value

AJS0010X

Measure voltage between each terminal and ground by following
Terminals and Reference Value for unified meter and A/C amp.

PIN CONNECTOR TERMINAL LAYOUT

TERMINALS AND REFERENCE VALUE FOR UNIFIED METER AND A/C AMP.

RJIA1758E

RJIA1759E

Terminal

No.

Wire

color

Item

Ignition

switch

Condition

Voltage

(V)

1

L

CAN H

-

-

-

11

Y

CAN L

-

-

-

21

Y/R

Power supply for BAT

OFF

-

Battery voltage

22

G

Power supply for IGN

ON

-

Battery voltage

29

B

Ground (Power)

ON

-

Approx. 0

30

B

Ground

ON

-

Approx. 0

35

P/B

Power supply for ACC

ACC

-

Battery voltage

39

B/R

Ambient sensor

-

-

-

40

LG

In-vehicle sensor

-

-

-

41

R/Y

Intake sensor

-

-

-

42

GR

Compressor ON signal

ON

A/C switch: ON

Approx. 0

A/C switch: OFF

Approx. 5

43

L/B

A/C LAN signal

ON

-

46

W/L

Power supply for IGN2

ON

-

Battery voltage

49

B/Y

Sensor ground

ON

-

Approx. 0

50

O

Sunload sensor

-

-

-

HAK0652D

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ATC-67

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ATC

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53

L/Y

Blower motor control signal

ACC or

ON

Blower speed: 1 st step

54

L/W

Power supply for each door
motor

ON

-

Battery voltage

57

SB

Blower motor ON signal

ACC or

ON

A/C switch: ON (Blower motor
operates)

Approx. 0

A/C switch: OFF

Approx. 5

Terminal

No.

Wire

color

Item

Ignition

switch

Condition

Voltage

(V)

SJIA0116J

ATC-68

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Self-diagnosis Function

AJS000Z3

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 usual control to the self-diagnostic system is accomplished by
starting the engine (turning the ignition switch ON) and pressing “OFF“ switch for at least 5 seconds. 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 AUTO switch or turning the ignition switch OFF. Shifting from one
step to another is accomplished by means of turning temperature dial (driver side), as required.
Additionally shifting from STEP-5 to AUXILIARY MECHANISM is accomplished by means of turning (fan)
dial clockwise.

RJIA1760E

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ATC-69

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ATC

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FUNCTION CONFIRMATION 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.

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.

●

Former STEP-1 (LEDs and display screen are checked) does not exist in this self-diagnosis func-
tion.

>> GO TO 2.

2.

STEP-2: SENSOR CIRCUITS ARE CHECKED FOR OPEN OR SHORT CIRCUIT

Does code No. 20 appear on the display?

YES

>> GO TO 3.

NO

>> GO TO 13.

3.

CHECK TO ADVANCE SELF-DIAGNOSIS STEP-3

Turn temperature dial (driver side) clockwise.

Advance to self-diagnosis STEP-3?

YES

>> GO TO 4.

NO

>> Malfunctioning temperature dial.
>> Replace A/C and AV switch.

4.

CHECK TO RETURN SELF-DIAGNOSIS STEP-2

Turn temperature dial (driver side) counterclockwise.

Return to self-diagnosis STEP-2?

YES

>> GO TO 5.

NO

>> 1. Malfunctioning temperature dial.

2. Replace A/C and AV switch.

5.

STEP-3: MODE DOOR AND INTAKE DOOR POSITIONS ARE CHECKED

Turn temperature dial (driver side) clockwise.

Does code No. 30 appear on the display?

YES

>> GO TO 6.

NO

>> GO TO 14.

RHA970DB

RHA869DD

ATC-70

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6.

STEP-4: OPERATION OF EACH ACTUATOR IS CHECKED

1.

Turn temperature dial (driver side) clockwise.

2.

Press DEF switch. Code No. of each actuator test is indicated
on the display.

>> GO TO 7.

7.

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: FOOT position during automatic control. Refer to

ATC-75, "AUXILIARY MECHANISM: FOOT POSITION

SETTING TRIMMER"

.

OK or NG

OK

>> GO TO 8.

NG

>>

●

Air outlet does not change.
Go to Mode Door Motor Circuit. Refer to

ATC-84, "Mode Door Motor Circuit"

.

●

Intake door does not change.
Go to Intake Door Motor Circuit. Refer to

ATC-90, "Intake Door Motor Circuit"

.

●

Blower motor operation is malfunctioning.
Go to Blower Motor Circuit. Refer to

ATC-93, "Blower Motor Circuit"

.

●

Magnet clutch does not engage.
Go to Magnet Clutch Circuit. Refer to

ATC-98, "Magnet Clutch Circuit"

.

●

Discharge air temperature does not change.
Go to Air Mix Door Motor Circuit. Refer to

ATC-87, "Air Mix Door Motor Circuit"

.

RHA495A

RJIA1761E

41

42

43

44

45

46

Mode door position

VENT

B/L 1

B/L 2

FOOT*1

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 duty ratio

37%

91%

65%

65%

65%

91%

Compressor

ON

ON

OFF

OFF

ON

ON

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ATC-71

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ATC

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8.

STEP-5: TEMPERATURE OF EACH SENSOR IS CHECKED

1.

Turn temperature dial (driver side) clockwise.

2.

Code No. 51 appears on the display.

>> GO TO 9.

9.

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 10.

NG

>> Go to Ambient Sensor Circuit. Refer to

ATC-115, "Ambi-

ent Sensor Circuit"

.

10.

CHECK IN-VEHICLE SENSOR

Press

(DEF) switch a 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 11.

NG

>> Go to In-vehicle Sensor Circuit. Refer to

ATC-118, "In-

vehicle Sensor Circuit"

.

11.

CHECK INTAKE SENSOR

Press

(DEF) switch a 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

>> GO TO 12.

NG

>> Go to Intake Sensor Circuit. Refer to

ATC-124, "Intake

Sensor Circuit"

.

RHA499G

RHA500G

RHA500GB

ATC-72

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12.

CHECK CAN COMMUNICATION ERROR

1.

Press

(REC) switch.

2.

CAN communication error between unified meter and A/C amp.
and DISPLAY UNIT or DISPLAY CONTROL UNIT is detected.

OK or NG

OK

>> 1. Turn ignition switch OFF or AUTO switch ON.

2. INSPECTION END

NG

>> Go to CAN communication. Refer to

DI-34, "CAN Com-

munication System Description"

.

●

Unified meter and A/C amp. - DISPLAY UNIT

●

Unified meter and A/C amp. - DISPLAY CONTROL
UNIT

13.

CHECK MALFUNCTIONING SENSOR

Refer to the following chart for malfunctioning code No.
(If two or more sensors malfunction, corresponding code Nos. blink respectively twice.)
*1: Perform self-diagnosis STEP-2 under sunshine.
When performing 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-115, "DIAGNOSTIC PROCEDURE FOR AMBIENT SENSOR"

.

*3:

ATC-119, "DIAGNOSTIC PROCEDURE FOR IN-VEHICLE SENSOR"

.

*4:

ATC-124, "DIAGNOSTIC PROCEDURE FOR INTAKE SENSOR"

.

*5:

ATC-121, "DIAGNOSTIC PROCEDURE FOR SUNLOAD SENSOR"

.

*6:

ATC-81, "DIAGNOSTIC PROCEDURE FOR LAN CIRCUIT"

.

>> INSPECTION END

RJIA1762E

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

Sunload sensor *1

*5

26 /

−

26

Air mix door motor PBR (Driver side)

*6

27 /

−

27

Air mix door motor PBR (Passenger side)

RJIA0493E

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ATC-73

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ATC

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14.

CHECK MALFUNCTIONING DOOR MOTOR POSITION SWITCH

Mode or (and) intake door motor PBR (s) is (are) malfunctioning.

(If two or more mode or intake doors are out of order, corresponding code numbers blink respectively twice.)
*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: FOOT position during automatic control. Refer to

ATC-75, "AUXILIARY MECHANISM: FOOT POSITION

SETTING TRIMMER"

.

*4:

ATC-84, "Mode Door Motor Circuit"

.

*5:

ATC-90, "Intake Door Motor Circuit"

.

>> INSPECTION END

Code No. *1 *2

Mode or intake door position

Reference page

31

VENT

Mode door motor

*4

32

B/L 1

33

B/L 2

34

FOOT*3

35

D/F

36

DEF

37

FRE

Intake door motor

*5

38

20% FRE

39

REC

RJIA0494E

ATC-74

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Revision; 2004 April

2003 Murano

AUXILIARY MECHANISM: TEMPERATURE SETTING TRIMMER

The trimmer compensates for differences in range of

±

3

°

C (

±

6

°

F) between temperature setting (displayed dig-

itally) and temperature felt by driver.
Operating procedures for this trimmer are as follows:

●

Begin Self-diagnosis STEP-5 mode. Refer to

ATC-68, "Self-diagnosis Function"

.

●

Turn fan control dial clockwise to set system in auxiliary mode.

●

Display shows 61 in auxiliary mechanism. It takes approximately 3 seconds.

●

Turn temperature dial (driver side) as desired. Temperature will change at a rate of 0.5

°

C (1.0

°

F) each

time a dial is turned.

CAUTION:

A decimal point is not indicated when the display shows “

°

C”.

When battery cable is disconnected, trimmer operation is canceled. Temperature set becomes that of initial
condition, i.e. 0

°

C (0

°

F).

RJIA1763E