Nissan Murano Z50 (2004 year). Manual — part 5

TROUBLE DIAGNOSIS

ATC-41

ATC

Revision: 2004 November

2004 Murano

TJWA0050E

ATC-42

TROUBLE DIAGNOSIS

Revision: 2004 November

2004 Murano

TJWA0096E

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ATC-43

ATC

Revision: 2004 November

2004 Murano

TJWA0097E

ATC-44

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2004 Murano

TJWA0098E

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ATC-45

ATC

Revision: 2004 November

2004 Murano

Auto Amp. Terminals and Reference Value

AJS0010X

Measure voltage between each terminal and ground by following 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)

CAN H

CAN L

Y/R

Power supply for BAT

OFF

Battery voltage

Power supply for IGN

Battery voltage

Ground (Power)

Approx. 0

Ground

Approx. 0

P/B

Power supply for ACC

ACC

Battery voltage

B/R

Ambient sensor

In-vehicle sensor

R/Y

Intake sensor

Compressor ON signal

A/C switch: ON

Approx. 0

A/C switch: OFF

Approx. 5

L/B

A/C LAN signal

W/L

Power supply for IGN2

Battery voltage

B/Y

Sensor ground

Approx. 0

Sunload sensor

HAK0652D

ATC-46

TROUBLE DIAGNOSIS

Revision: 2004 November

2004 Murano

L/Y

Blower motor control signal

ACC or

Blower speed: 1st step

L/W

Power supply for each door
motor

Battery voltage

Blower motor ON signal

ACC or

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

TROUBLE DIAGNOSIS

ATC-47

ATC

Revision: 2004 November

2004 Murano

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

ATC-48

TROUBLE DIAGNOSIS

Revision: 2004 November

2004 Murano

FUNCTION CONFIRMATION PROCEDURE

SET IN SELF-DIAGNOSTIC MODE

Turn ignition switch ON.

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.

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

Does code No. 20 appear on the display?

YES

>> GO TO 3.

>> GO TO 13.

CHECK TO ADVANCE SELF-DIAGNOSIS STEP-3

Turn temperature dial (driver side) clockwise.

Advance to self-diagnosis STEP-3?

YES

>> GO TO 4.

>> Replace A/C and AV switch. (temperature dial malfunctions.)

CHECK TO RETURN SELF-DIAGNOSIS STEP-2

Turn temperature dial (driver side) counterclockwise.

Return to self-diagnosis STEP-2?

YES

>> GO TO 5.

>> Replace A/C and AV switch. (temperature dial malfunctions.)

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.

>> GO TO 14.

RHA970DB

RHA869DD

TROUBLE DIAGNOSIS

ATC-49

ATC

Revision: 2004 November

2004 Murano

STEP-4: OPERATION OF EACH ACTUATOR IS CHECKED

Turn temperature dial (driver side) clockwise.

Press

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

cated on the display.

>> GO TO 7.

CHECK ACTUATORS

Refer to the following chart and confirm discharge air flow, air tem-
perature, blower motor duty ratio 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-54, "AUXILIARY MECHANISM: FOOT POSITION

SETTING TRIMMER"

OK or NG

>> GO TO 8.

●

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

ATC-64, "Mode Door Motor Circuit"

●

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

ATC-70, "Intake Door Motor Circuit"

●

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

ATC-73, "Blower Motor Circuit"

●

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

ATC-78, "Magnet Clutch Circuit"

●

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

ATC-67, "Air Mix Door Motor Circuit"

RHA495A

RJIA1761E

Mode door position

VENT

B/L 1

B/L 2

FOOT*1

D/F

DEF

Intake door position

REC

20%FRE

FRE

Air mix door position

FULL COLD

FULL HOT

Blower motor duty ratio

37%

91%

65%

91%

Compressor

OFF

ATC-50

TROUBLE DIAGNOSIS

Revision: 2004 November

2004 Murano

STEP-5: TEMPERATURE OF EACH SENSOR IS CHECKED

Turn temperature dial (driver side) clockwise.

Code No. 51 appears on the display.

>> GO TO 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, and then inspect sensor.

OK or NG

>> GO TO 10.

>> Go to Ambient Sensor Circuit. Refer to

ATC-96, "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, and then inspect sensor.

OK or NG

>> GO TO 11.

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

ATC-99, "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, and then inspect sensor.
OK or NG

>> GO TO 12.

>> Go to Intake Sensor Circuit. Refer to

ATC-105, "Intake

Sensor Circuit"

RHA499G

RHA500G

RHA500GB

TROUBLE DIAGNOSIS

ATC-51

ATC

Revision: 2004 November

2004 Murano

12.

CHECK CAN COMMUNICATION ERROR

Press

(REC) switch.

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

OK or NG

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

2. INSPECTION END

>> Go to CAN communication. Refer to

DI-33, "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-96, "DIAGNOSTIC PROCEDURE FOR AMBIENT SENSOR"

*3:

ATC-100, "DIAGNOSTIC PROCEDURE FOR IN-VEHICLE SENSOR"

*4:

ATC-105, "DIAGNOSTIC PROCEDURE FOR INTAKE SENSOR"

*5:

ATC-102, "DIAGNOSTIC PROCEDURE FOR SUNLOAD SENSOR"

*6:

ATC-60, "DIAGNOSTIC PROCEDURE FOR LAN CIRCUIT"

>> INSPECTION END

RJIA1762E

Code No.

Malfunctioning sensor (Including circuits)

Reference page

21 /

−

Ambient sensor

22 /

−

In-vehicle sensor

24 /

−

Intake sensor

25 /

−

Sunload sensor *1

26 /

−

Air mix door motor PBR (Driver side)

27 /

−

Air mix door motor PBR (Passenger side)

RJIA0493E

ATC-52

TROUBLE DIAGNOSIS

Revision: 2004 November

2004 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 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

→

Return to 31

*2: If intake door motor harness connector is disconnected, the following display pattern will appear.
37

→

Return to 37

*3: FOOT position during automatic control. Refer to

ATC-54, "AUXILIARY MECHANISM: FOOT POSITION

SETTING TRIMMER"

*4:

ATC-64, "Mode Door Motor Circuit"

*5:

ATC-70, "Intake Door Motor Circuit"

>> INSPECTION END

Code No. *1 *2

Mode or intake door position

Reference page

VENT

Mode door motor

B/L 1

B/L 2

FOOT*3

D/F

DEF

FRE

Intake door motor

20% FRE

REC

RJIA0494E

TROUBLE DIAGNOSIS

ATC-53

ATC

Revision: 2004 November

2004 Murano

AUXILIARY MECHANISM: TEMPERATURE SETTING TRIMMER

The trimmer compensates for differences in range of

C (

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-47, "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

ATC-54

TROUBLE DIAGNOSIS

Revision: 2004 November

2004 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"

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

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

Press the mode switch as desired.

AUXILIARY MECHANISM: INLET PORT MEMORY FUNCTION

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:
1.

Begin Self-diagnosis STEP-5 mode. Refer to

ATC-47, "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.

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

RJIA1764E

Switch

LED status of

REC/FRE

switch

Setting status

Setting changeover method

REC

Manual REC status is memorized. (Initial setting)

REC SW: ON

OFF

AUTO control

FRE

Manual FRE status is memorized.

FRE SW: ON

OFF

AUTO control (Initial setting)

TROUBLE DIAGNOSIS

ATC-55

ATC

Revision: 2004 November

2004 Murano

Operational Check

AJS000Z4

The purpose of the operational check is to confirm that the system operates properly.

CHECKING MEMORY FUNCTION

Set the temperature to 32

C (90

F).

Press OFF switch.

Turn ignition switch OFF.

Turn ignition switch ON.

Press the AUTO switch.

Confirm that the set temperature remains at previous tempera-
ture.

Press OFF switch.

If NG, go to trouble diagnosis procedure for

ATC-95, "Memory Func-

tion"

If OK, continue the check.

CHECKING BLOWER

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

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

Leave blower on MAX. speed.

If NG, go to trouble diagnosis procedure for

ATC-75, "DIAGNOSTIC

PROCEDURE FOR BLOWER MOTOR"

If OK, continue the check.

CHECKING DISCHARGE AIR

Press MODE switch and DEF switch.

Each position indicator should change shape.

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

ATC-31, "Discharge Air Flow"

If NG, go to trouble diagnosis procedure for

ATC-64, "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.

Conditions

: Engine running at usual operating temperature

RJIA1765E

RJIA1766E

RJIA1767E

RJIA1761E

ATC-56

TROUBLE DIAGNOSIS

Revision: 2004 November

2004 Murano

CHECKING RECIRCULATION

Press recirculation (REC) switch one time. Recirculation indica-
tor should illuminate.

Press fresh (FRE) switch one time. Fresh indicator should illumi-
nate.

Listen for intake door position change (you should hear blower
sound change slightly).

If NG, go to trouble diagnosis procedure for

ATC-70, "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

Turn temperature dial (driver side) counterclockwise until 18

(60

F) is displayed.

Check for cold air at discharge air outlets.

If NG, go to trouble diagnosis procedure for

ATC-84, "Insufficient

Cooling"

If OK, continue the check.

CHECKING TEMPERATURE INCREASE

Turn temperature dial (driver side) clockwise until 32

C (90