Nissan Murano Z50 (2006 year). Manual — part 5

TROUBLE DIAGNOSIS

ATC-41

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ATC

Revision: 2006 August

2006 Murano

TJWB0167E

ATC-42

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2006 Murano

TJWB0168E

TROUBLE DIAGNOSIS

ATC-43

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ATC

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TJWB0169E

ATC-44

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2006 Murano

TJWB0170E

TROUBLE DIAGNOSIS

ATC-45

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ATC

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Auto Amp. Terminals and Reference Value

NJS000AV

Measure voltage between each terminal and ground by referring ter-
minals 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 from BATT

OFF

—

Battery voltage

22

G

Power supply from IGN

ON

—

Battery voltage

29

B

Ground (Power)

ON

—

Approx. 0

30

B

Ground

ON

—

Approx. 0

35

P/B

Power supply from 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
(Blower motor operates.)

Approx. 0

OFF switch: ON
(A/C system: OFF)

43

L/B

A/C LAN signal

ON

—

SJIA1423J

SJIA1453J

ATC-46

TROUBLE DIAGNOSIS

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2006 Murano

46

W/L

Power supply from IGN2

ON

—

Battery voltage

49

B/Y

Sensor ground

ON

—

Approx. 0

50

O

Sunload sensor

—

—

—

53

L/Y

Blower motor control signal

ON

Blower speed: 1st speed
(manual)

54

L/W

Power supply for each door
motor

ON

—

Battery voltage

57

SB

Blower motor ON signal

ON

A/C switch: ON
(Blower motor operates.)

Approx. 0

OFF switch: ON
(A/C system: OFF)

Terminal

No.

Wire

color

Item

Ignition

switch

Condition

Voltage

(V)

SJIA1454J

SJIA1474J

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ATC-47

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ATC

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Self-diagnosis Function

NJS000AW

DESCRIPTION

The self-diagnosis 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-diagnosis 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 is
accomplished by means of turning temperature control dial (driver side), as required.
Shifting from STEP-5 to AUXILIARY MECHANISM is accomplished by means of turning (fan) control dial
clockwise.

SJIA1154E

ATC-48

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Revision: 2006 August

2006 Murano

FUNCTION CONFIRMATION PROCEDURE

1.

SET IN SELF-DIAGNOSIS MODE

1.

Turn ignition switch ON.

2.

Set in self-diagnosis mode as follows. Within 10 seconds after starting engine (ignition switch is turned
ON.), press OFF switch for at least 5 seconds.

NOTE:

●

If battery voltage drops below 12 V during diagnosis STEP-3, door motor speed becomes slower and as a
result, the system may generate an error even when operation is normal. 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 function.

>> 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 control dial (driver side) clockwise.

Advance to self-diagnosis STEP-3?

YES

>> GO TO 4.

NO

>> Replace A/C and AV switch. (Temperature control dial is malfunctioning.)

4.

CHECK TO RETURN SELF-DIAGNOSIS STEP-2

Turn temperature control dial (driver side) counterclockwise.
Return to self-diagnosis STEP-2?

YES

>> GO TO 5.

NO

>> Replace A/C and AV switch. (Temperature control dial is malfunctioning.)

5.

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

Turn temperature control dial (driver side) clockwise.

Does code No. 30 appear on the display?

YES

>> GO TO 6.

NO

>> GO TO 14.

SJIA1778E

SJIA1779E

TROUBLE DIAGNOSIS

ATC-49

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ATC

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6.

STEP-4: OPERATION OF EACH ACTUATOR IS CHECKED

1.

Turn temperature control dial (driver side) clockwise.

2.

Press

(DEF) switch. Code No. of each actuator test is indi-

cated on the display.

>> GO TO 7.

7.

CHECK ACTUATORS

Refer to the following chart and check discharge air flow, air temper-
ature, blower motor duty ratio and compressor operation.

Checks must be made visually, by listening the sound, or by touching air outlets with hand, etc. for improper
operation.
*1: FOOT position during automatic control. Refer to

ATC-54, "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-63, "Mode Door Motor Circuit"

.

●

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

ATC-69, "Intake Door Motor Circuit"

.

●

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

ATC-66, "Air Mix Door Motor Circuit"

.

●

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

ATC-72, "Blower Motor Circuit"

.

●

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

ATC-77, "Magnet Clutch Circuit"

.

SJIA1780E

RJIA3995E

Code No.

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 motor duty ratio

37%

91%

65%

65%

65%

91%

Compressor

ON

ON

OFF

OFF

ON

ON

ATC-50

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Revision: 2006 August

2006 Murano

8.

STEP-5: TEMPERATURE OF EACH SENSOR IS CHECKED

1.

Turn temperature control 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 the temperature indicated on the display greatly differs from the
actual temperature, check sensor circuit first, and then check sensor.

OK or NG

OK

>> GO TO 10.

NG

>> Go to Ambient Sensor Circuit. Refer to

ATC-95, "Ambi-

ent Sensor Circuit"

.

10.

CHECK IN-VEHICLE SENSOR

Press

(DEF) switch for the second time. Temperature detected

by in-vehicle sensor is indicated on the display.

NOTE:
If the temperature indicated on the display greatly differs from the
actual temperature, check sensor circuit first, and then check sensor.

OK or NG

OK

>> GO TO 11.

NG

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

ATC-98, "In-

vehicle Sensor Circuit"

.

11.

CHECK INTAKE SENSOR

Press

(DEF) switch for the third time. Temperature detected by

intake sensor is indicated on the display.

NOTE:
If the temperature indicated on the display greatly differs from the
actual temperature, check sensor circuit first, and then check sensor.
OK or NG

OK

>> GO TO 12.

NG

>> Go to Intake Sensor Circuit. Refer to

ATC-104, "Intake

Sensor Circuit"

.

PJIA0151E

PJIA0152E

PJIA0153E

TROUBLE DIAGNOSIS

ATC-51

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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 control unit is displayed. (If pulual errors occur, the
display of each error will indicates 1 second each.)

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, "DTC

[U1000] CAN Communication Circuit"

.

●

Unified meter and A/C amp. - Display control unit

13.

CHECK MALFUNCTIONING SENSOR AND DOOR MOTOR

Refer to the following chart for malfunctioning code No.
(If two or more sensors and door motors malfunction, corresponding code Nos. indicates 1 second each.)
*1: Perform self-diagnosis STEP-2 under sunshine.
When performing indoors, aim a light (more than 60 W) at sunload sensor, otherwise code No. 25 will indicate
despite that sunload sensor is functioning properly.

*2:

ATC-95, "DIAGNOSIS PROCEDURE FOR AMBIENT SENSOR"

.

*3:

ATC-99, "DIAGNOSIS PROCEDURE FOR IN-VEHICLE SENSOR"

.

*4:

ATC-104, "DIAGNOSIS PROCEDURE FOR INTAKE SENSOR"

.

*5:

ATC-101, "DIAGNOSIS PROCEDURE FOR SUNLOAD SENSOR"

.

*6:

ATC-68, "DIAGNOSIS PROCEDURE FOR AIR MIX DOOR MOTOR PBR"

.

>> INSPECTION END

SJIA1155E

Code No.

Malfunctioning sensor and door motor (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)

SJIA1781E

ATC-52

TROUBLE DIAGNOSIS

Revision: 2006 August

2006 Murano

14.

CHECK MALFUNCTIONING DOOR MOTOR POSITION SWITCH

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

(If two or more mode or intake door motors malfunction, corresponding code Nos. indicates 1 second each)
*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-54, "AUXILIARY MECHANISM: FOOT POSITION

SETTING TRIMMER"

.

*4:

ATC-65, "DIAGNOSIS PROCEDURE FOR MODE DOOR MOTOR"

.

*5:

ATC-71, "DIAGNOSIS PROCEDURE FOR INTAKE DOOR MOTOR"

.

>> 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

SJIA1782E

TROUBLE DIAGNOSIS

ATC-53

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ATC

Revision: 2006 August

2006 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 customer.
Operating procedures for this trimmer are as follows:

1.

Begin self-diagnosis STEP-5 mode. Refer to

ATC-47, "Self-diagnosis Function"

.

2.

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

3.

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

4.

Turn temperature control 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 on the display.

When battery cable is disconnected or battery voltage is below 10 V, trimmer operation is canceled. Tempera-
ture set becomes that of initial condition, i.e. 0

°

C (0

°

F).

SJIA1156E

ATC-54

TROUBLE DIAGNOSIS

Revision: 2006 August

2006 Murano

AUXILIARY MECHANISM: FOOT POSITION SETTING TRIMMER

Wind distribution ratio in FOOT mode can be set.
Operating procedures for this trimmer are as follows:
1.

Begin self-diagnosis STEP-5 mode. Refer to

ATC-47, "Self-diagnosis Function"

.

2.

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

3.

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

4.

Press the mode switch as desired.

When battery cable is disconnected or battery voltage is below 10 V, trimmer operation is canceled. Wind dis-
tribution ratio set becomes that of initial condition.

AUXILIARY MECHANISM: INLET PORT MEMORY FUNCTION

When ignition switch is turned from OFF to ON, inlet port memory function at manual mode can be set.
Operating procedures for this trimmer are as follows:

1.

Begin self-diagnosis STEP-5 mode. Refer to

ATC-47, "Self-diagnosis Function"

.

2.

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

3.

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

4.

Press the recirculation (REC) and fresh (FRE) switch as desired.

When battery cable is disconnected or battery voltage is below 10 V, memory function is canceled. Memory
function set becomes that of initial condition.

PJIA0124E

Switch

LED status of

REC/FRE

switch

Setting status

Setting changeover method

REC

ON

Manual REC status is memorized. (Initial setting)

REC SW: ON

OFF

AUTO control

FRE

ON

Manual FRE status is memorized.

FRE SW: ON

OFF

AUTO control (Initial setting)

TROUBLE DIAGNOSIS

ATC-55

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Revision: 2006 August

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Operational Check

NJS000AX

The purpose of the operational check is to check if the individual system operates properly.

CHECKING MEMORY FUNCTION

1.

Turn temperature control dial clockwise until 32

°

C (90

°

F) is displayed.

2.

Press OFF switch.

3.

Turn ignition switch OFF.

4.

Turn ignition switch ON.

5.

Press the AUTO switch.

6.

Confirm that the set temperature remains at previous temperature.

7.

Press OFF switch.

If NG, go to trouble diagnosis procedure for

ATC-94, "Memory Function"

.

If OK, continue the check.

CHECKING BLOWER

1.

Turn fan control dial clockwise. Blower should operate on low speed. The fan symbol should have one
blade lit.

2.

Turn fan control dial clockwise again, and continue checking blower speed and fan symbol until all speeds
are checked.

3.

Leave blower on max. speed.

If NG, go to trouble diagnosis procedure for

ATC-72, "Blower Motor Circuit"

.

If OK, continue the check.

CHECKING DISCHARGE AIR

1.

Press MODE switch and DEF switch.

2.

Each position indicator should change shape.

3.

Confirm that discharge air comes out according to the air distri-
bution table. Refer to

ATC-32, "Discharge Air Flow"

.

If NG, go to trouble diagnosis procedure for

ATC-63, "Mode Door

Motor Circuit"

.

If OK, continue the check.

NOTE:
Confirm that the compressor clutch is engaged (sound or visual
inspection) and intake door position is at FRESH when the DEF or
D/F is selected.

CHECKING INTAKE AIR

1.

Press recirculation (REC) switch. Recirculation indicator should illuminate.

2.

Press fresh (FRE) switch. Fresh indicator should illuminate.

3.

Listen for intake door position change. (Slight change of blower sound can be heard.)

If NG, go to trouble diagnosis procedure for

ATC-69, "Intake Door Motor Circuit"

.

If OK, continue the check.

NOTE:
Confirm that the compressor clutch is engaged (sound or visual inspection) and intake door position is at
FRESH when the DEF or D/F is selected.

CHECKING TEMPERATURE DECREASE

1.

Turn temperature control dial (driver side) counterclockwise until 18

°

C (60

°

F) is displayed.

2.

Check for cold air at discharge air outlets.

If NG, go to trouble diagnosis procedure for

ATC-83, "Insufficient Cooling"

.

If OK, continue the check.

Conditions

: Engine running at normal operating temperature

RJIA3995E

ATC-56

TROUBLE DIAGNOSIS

Revision: 2006 August

2006 Murano

CHECKING TEMPERATURE INCREASE

1.

Turn temperature control dial (driver side) clockwise until 32

°

C (90

°

F) is displayed.

2.

Check for hot air at discharge air outlets.

If NG, go to trouble diagnosis procedure for

ATC-91, "Insufficient Heating"

.

If OK, continue the check.

CHECK A/C SWITCH

Press AUTO switch and A/C switch. Then A/C switch indicator is turned ON.

●

Confirm that the compressor clutch engages (sound or visual inspection).

If NG, go to trouble diagnosis procedure for

ATC-77, "Magnet Clutch Circuit"

.

If OK, continue the check.

CHECKING AUTO MODE

Press AUTO switch and A/C switch. Then display is indicated AUTO.

●

Confirm that the compressor clutch engages (sound or visual inspection). (Discharge air and blower
speed will depend on ambient, in-vehicle, and set temperatures.)

If NG, go to trouble diagnosis procedure for

ATC-57, "Power Supply and Ground Circuit for Auto Amp."

, then

if necessary, trouble diagnosis procedure for

ATC-77, "Magnet Clutch Circuit"

.

If all operational checks are OK (symptom cannot be duplicated), go to Malfunction Simulation Tests in

GI-27,

"How to Perform Efficient Diagnosis for an Electrical Incident"

and perform tests as outlined to simulate driv-

ing conditions environment. If symptom appears, refer to

ATC-36, "SYMPTOM TABLE"

and perform applica-

ble trouble diagnosis procedures.