Nissan Murano Z50 (2005 year). Manual - part 9

TROUBLE DIAGNOSIS

ATC-105

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ATC

Revision: 2005 August

2005 Murano

COMPONENT INSPECTION
Sunload Sensor

Measure voltage between unified meter and A/C amp. harness con-
nector M51 terminal 50 (O) and ground.

●

When checking sunload sensor, select a place where sun shines directly on it.

If NG, replace sunload sensor.

RJIA1807E

SHA930E

ATC-106

TROUBLE DIAGNOSIS

Revision: 2005 August

2005 Murano

Intake Sensor Circuit

AJS00114

COMPONENT DESCRIPTION
Intake Sensor

The intake sensor is located on the heater & cooling unit assembly. It
converts temperature of air after it passes through the evaporator
into a resistance value which is then input to the unified meter and A/
C amp.

DIAGNOSIS PROCEDURE FOR INTAKE SENSOR

SYMPTOM: Intake sensor circuit is open or shorted. (24 or 

−

24 is

indicated on unified meter and A/C amp. as a result of performing
self-diagnosis STEP-2.)

1. 

CHECK VOLTAGE BETWEEN INTAKE SENSOR AND GROUND

1.

Disconnect intake sensor connector.

2.

Turn ignition switch ON.

3.

Check voltage between intake sensor harness connector M256
terminal 1 (R/W) and ground.

OK or NG

OK

>> GO TO 2.

NG

>> GO TO 4.

2. 

CHECK CIRCUIT CONTINUITY BETWEEN INTAKE SENSOR AND UNIFIED METER AND A/C AMP.

1.

Turn ignition switch OFF.

2.

Disconnect unified meter and A/C amp. connector.

3.

Check continuity between intake sensor harness connector
M256 terminal 2 (B/Y) and unified meter and A/C amp. harness
connector M51 terminal 49 (B/Y).

OK or NG

OK

>> GO TO 3.

NG

>> Repair harness or connector.

RJIA1808E

RJIA1458E

1 – Ground

: Approx. 5 V

RJIA1809E

2 – 49

: Continuity should exist.

RJIA1810E

TROUBLE DIAGNOSIS

ATC-107

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Revision: 2005 August

2005 Murano

3. 

CHECK INTAKE SENSOR

Refer to 

ATC-107, "Intake Sensor"

 .

OK or NG

OK

>> 1. Replace unified meter and A/C amp.

2. Go to self-diagnosis 

ATC-49, "FUNCTION CONFIRMATION PROCEDURE"

  and perform self-

diagnosis STEP-2. Confirm that code No. 20 is displayed.

NG

>> 1. Replace intake sensor.

2. Go to self-diagnosis 

ATC-49, "FUNCTION CONFIRMATION PROCEDURE"

  and perform self-

diagnosis STEP-2. Confirm that code No. 20 is displayed.

4. 

CHECK CIRCUIT CONTINUITY BETWEEN INTAKE SENSOR AND UNIFIED METER AND A/C AMP.

1.

Turn ignition switch OFF.

2.

Disconnect unified meter and A/C amp. connector.

3.

Check continuity between intake sensor harness connector
M256 terminal 1 (R/W) and unified meter and A/C amp. harness
connector M51 terminal 41 (R/Y).

4.

Check continuity between intake sensor harness connector
M256 terminal 1 (R/W) and ground.

OK or NG

OK

>> 1. Replace unified meter and A/C amp.

2. Go to self-diagnosis 

ATC-49, "FUNCTION CONFIRMATION PROCEDURE"

  and perform self-

diagnosis STEP-2. Confirm that code No. 20 is displayed.

NG

>> Repair harness or connector.

COMPONENT INSPECTION
Intake Sensor

After disconnecting intake sensor connector M256, measure resis-
tance between terminals 1 (R/W) and 2 (B/Y) at sensor side, using
the table below.

If NG, replace intake sensor.

1 – 41

: Continuity should exist.

1 – Ground

: Continuity should not exist.

RJIA1811E

Temperature 

°

C (

°

F)

Resistance k

Ω

−

15 (5)

18.63

−

10 (14)

14.14

−

5 (23)

10.85

0 (32)

8.40

5 (41)

6.57

10 (50)

5.18

15 (59)

4.12

20 (68)

3.30

25 (77)

2.66

30 (86)

2.16

35 (95)

1.77

40 (104)

1.46

45 (113)

1.21

RJIA1812E

ATC-108

CONTROLLER

Revision: 2005 August

2005 Murano

CONTROLLER

PFP:27500

Removal and Installation of A/C and AV Switch

AJS000ZN

REMOVAL

Refer to 

AV-69, "Removal and Installation for A/C and AV Switch"

 .

INSTALLATION

Installation is basically the reverse order of removal.

AUTO AMP

ATC-109

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Revision: 2005 August

2005 Murano

AUTO AMP

PFP:27760

Removal and Installation of Unified Meter and A/C Amp.

AJS000ZP

REMOVAL

1.

Remove audio unit. Refer to 

AV-67, "Removal and Installation of Audio Unit"

 .

2.

Remove mounting screws, and then remove unified meter and
A/C amp.

INSTALLATION

Installation is basically the reverse order of removal.

RJIA1813E

ATC-110

AMBIENT SENSOR

Revision: 2005 August

2005 Murano

AMBIENT SENSOR

PFP:27722

Removal and Installation

AJS000ZR

REMOVAL

1.

Remove ambient sensor from bracket.

2.

Disconnect ambient sensor connector, and then remove ambi-
ent sensor.

INSTALLATION

Installation is basically the reverse order of removal.

RJIA3971E

IN-VEHICLE SENSOR

ATC-111

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ATC

Revision: 2005 August

2005 Murano

IN-VEHICLE SENSOR

PFP:27720

Removal and Installation

AJS000ZS

REMOVAL

1.

Remove instrument driver lower panel. Refer to 

IP-11, "Removal and Installation"

 .

2.

Remove mounting screw, and then remove in-vehicle sensor.

INSTALLATION

Installation is basically the reverse order of removal.

RJIA1814E

ATC-112

SUNLOAD SENSOR

Revision: 2005 August

2005 Murano

SUNLOAD SENSOR

PFP:27721

Removal and Installation

AJS000ZT

REMOVAL

1.

Remove instrument mask (right side). Refer to 

IP-11, "Removal and Installation"

 .

2.

Disconnect sunload sensor connector, and then remove sunload
sensor.

INSTALLATION

Installation is basically the reverse order of removal.

RJIA1806E

INTAKE SENSOR

ATC-113

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Revision: 2005 August

2005 Murano

INTAKE SENSOR

PFP:27723

Removal and Installation

AJS000ZU

REMOVAL

1.

Remove low-pressure pipe 2 and high-pressure pipe 2. Refer to 

ATC-143, "Removal and Installation of

Low-pressure Pipe 2 and High-pressure Pipe 2"

 .

CAUTION:

Cap or wrap the joint of the pipe with suitable material such as vinyl tape to avoid the entry air. 

2.

Slide evaporator to passenger side, and then remove intake
sensor.

INSTALLATION

Installation is basically the reverse order of removal.

CAUTION:

●

Replace O-rings of A/C piping with new ones, and then apply compressor oil to it when installing
it.

●

Mark the mounting position of intake sensor bracket prior to removal so that the reinstalled sen-
sor can be located in the same position.

●

Connection point for female-side piping is thin. So, when inserting male-side piping, take care not
to deform female-side piping. Slowly insert in axial direction.

●

Insert one-touch joint connection point securely until it clicks.

●

After piping has been connected, pull male-side piping by hand to make sure piping does not
come off.

●

When recharging refrigerant, check for leaks. 

RJIA1808E

ATC-114

BLOWER UNIT

Revision: 2005 August

2005 Murano

BLOWER UNIT

PFP:27200

Removal and Installation

AJS000ZV

REMOVAL

1.

Remove instrument passenger lower panel. Refer to 

IP-11, "Removal and Installation"

 .

2.

Remove ECM with bracket attached.

3.

Disconnect intake door motor connector and blower fan motor
connector.

4.

Remove mounting nuts, bolts and screw, and then remove
blower unit.

5.

Remove harness clips from blower unit.

6.

Remove blower unit.

CAUTION:

Move blower unit rightward, and remove locating pin (1
part) and joint. Then remove blower unit downward.

INSTALLATION

Installation is basically the reverse order of removal.

CAUTION:

Make sure locating pin (1 part) and joint are securely inserted.

RJIA1818E

RJIA1819E

BLOWER UNIT

ATC-115

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Revision: 2005 August

2005 Murano

Disassembly and Assembly

AJS000ZW

CAUTION:

If retaining tabs are damaged while disassembling blower unit,
use 7 screws (27111-2Y000) to assemble blower unit.

1.

Intake adapter

2.

Intake box case

3.

Intake upper case

4.

Intake lower case

5.

Blower fan motor assembly

6.

Intake door motor

7.

In-cabin microfilter

8.

Filter cover

9.

Intake door 2

10. Intake door 1

11.

Intake door lever 1

12. Intake door link

13. Intake door lever 2

RJIA1820E

RJIA1821E

ATC-116

BLOWER UNIT

Revision: 2005 August

2005 Murano

Removal and Installation of Blower Duct

AJS001S7

REMOVAL

1.

Remove instrument panel assembly. Refer to 

IP-11, "Removal and Installation"

 .

2.

Remove blower unit. Refer to 

ATC-114, "BLOWER UNIT"

 .

3.

Remove mounting nuts, and then remove blower duct.

INSTALLATION

Installation is basically the reverse order of removal.

RJIA4001E

BLOWER MOTOR

ATC-117

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Revision: 2005 August

2005 Murano

BLOWER MOTOR

PFP:27226

Removal and Installation

AJS000ZX

REMOVAL

1.

Remove instrument passenger lower panel. Refer to 

IP-11, "Removal and Installation"

 .

2.

Disconnect blower motor connector.

3.

Remove mounting screws, and then remove blower motor.

INSTALLATION

Installation is basically the reverse order of removal.

RJIA1822E

ATC-118

INTAKE DOOR MOTOR

Revision: 2005 August

2005 Murano

INTAKE DOOR MOTOR

PFP:27730

Removal and Installation

AJS000ZY

REMOVAL

1.

Remove blower unit. Refer to 

ATC-114, "BLOWER UNIT"

 .

2.

Remove mounting screws, and then remove intake door motor
from blower unit.

INSTALLATION

Installation is basically the reverse order of removal.

RJIA1823E

IN-CABIN MICROFILTER

ATC-119

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ATC

Revision: 2005 August

2005 Murano

IN-CABIN MICROFILTER

PFP:27277

Removal and Installation

AJS000ZZ

FUNCTION

Air inside passenger compartment is kept clean at either recircula-
tion or fresh mode by installing in-cabin microfilter into blower unit.

REPLACEMENT TIMING

Replace in-cabin microfilter.
Refer to 

MA-8, "CHASSIS AND BODY MAINTENANCE"

  in Schedule 1 and 

MA-9, "CHASSIS AND BODY

MAINTENANCE"

  in Schedule 2.

Caution label is fixed inside glove box.

REPLACEMENT PROCEDURES

1.

Remove instrument passenger lower panel. Refer to 

IP-11, "Removal and Installation"

 .

2.

Remove filter cover, and then remove in-cabin microfilter.

3.

Take out in-cabin microfilter from blower unit.

4.

Replace with new one and reinstall on blower unit.

5.

Reinstall glove box.

RJIA1331E

RJIA1824E

ATC-120

HEATER & COOLING UNIT ASSEMBLY

Revision: 2005 August

2005 Murano

HEATER & COOLING UNIT ASSEMBLY

PFP:27110

Removal and Installation

AJS00100

REMOVAL

1.

Use a refrigerant collecting equipment (for HFC-134a) to discharge the refrigerant.

2.

Drain coolant from cooling system. Refer to 

CO-9, "Changing Engine Coolant"

 .

3.

Remove cowl top cover. Refer to 

EI-21, "COWL TOP"

 .

4.

Disconnect evaporator-side one-touch joints.

a.

Set a disconnector [high-pressure side (SST: 9253089908), low-
pressure side (SST: 9253089916)] on A/C piping.

b.

Slide a disconnector toward vehicle front until it clicks.

c.

Slide A/C piping toward vehicle front and disconnect it.

CAUTION:

Cap or wrap the joint of the pipe with suitable material such
as vinyl tape to avoid the entry of air.

5.

Remove clamps, and then disconnect two heater hoses from
heater core.

6.

Remove instrument panel assembly. Refer to 

IP-11, "Removal and Installation"

 .

7.

Remove blower unit. Refer to 

ATC-114, "BLOWER UNIT"

 .

8.

Remove clips of vehicle harness from steering member.

9.

Remove mounting nuts, and then remove instrument stays
(driver side and passenger side).

10. Remove mounting bolts from heater & cooling unit.

11. Remove rear ventilator duct 1 and front floor duct. Refer to 

ATC-

129, "Removal of Rear Ventilator Ducts"

  and 

ATC-131,

"Removal of Floor Ducts"

 .

RJIA1815E

RJIA1825E

RJIA1826E

RJIA1828E