Nissan Murano Z50 (2004 year). Manual - part 9

TROUBLE DIAGNOSIS

ATC-105

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ATC

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2004 Murano

Intake Sensor Circuit

AJS00114

COMPONENT DESCRIPTION
Intake Sensor

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

DIAGNOSTIC 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. 5V

RJIA1809E

2 – 49

: Continuity should exist.

RJIA1810E

ATC-106

TROUBLE DIAGNOSIS

Revision: 2004 November

2004 Murano

3. 

CHECK INTAKE SENSOR

Refer to 

ATC-106, "Intake Sensor"

 .

OK or NG

OK

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

2. Go to self-diagnosis 

ATC-48, "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-48, "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-48, "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 and 2 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

CONTROLLER

ATC-107

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ATC

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CONTROLLER

PFP:27500

Removal and Installation of A/C and AV Switch

AJS000ZN

REMOVAL

Refer to 

AV-68, "Removal and Installation for A/C and AV Switch"

 .

INSTALLATION

Installation is basically the reverse order of removal.

ATC-108

AUTO AMP

Revision: 2004 November

2004 Murano

AUTO AMP

PFP:27760

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

AJS000ZP

REMOVAL

1.

Remove audio unit. Refer to 

AV-66, "Removal and Installation of Audio Unit"

 .

2.

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

INSTALLATION

Installation is basically the reverse order of removal.

RJIA1813E

AMBIENT SENSOR

ATC-109

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ATC

Revision: 2004 November

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AMBIENT SENSOR

PFP:27722

Removal and Installation

AJS000ZR

REMOVAL

1.

Remove ambient sensor from bracket.

2.

Disconnect ambient sensor connector, and then remove it.

INSTALLATION

Installation is basically the reverse order of removal.

RJIA1800E

ATC-110

IN-VEHICLE SENSOR

Revision: 2004 November

2004 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

SUNLOAD SENSOR

ATC-111

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ATC

Revision: 2004 November

2004 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

ATC-112

INTAKE SENSOR

Revision: 2004 November

2004 Murano

INTAKE SENSOR

PFP:27723

Removal and Installation

AJS000ZU

REMOVAL

1.

Set the temperature at 18

°

C (60

°

F), and then disconnect the battery negative cable. 

2.

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

3.

Remove the fixing bolt, then remove the low-pressure pipe 2 and high-pressure pipe 2. Refer to 

ATC-140,

"Removal and Installation of Low-Pressure Pipe 2 and High-Pressure Pipe 2"

 .

CAUTION:

Seal connection opening of piping with a cap or vinyl tape to avoid exposure to atmosphere.

4.

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

INSTALLATION

Installation is basically the reverse order of removal.

CAUTION:

●

Replace O-rings for A/C piping with new ones. Before installing, apply compressor oil to them.

●

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

BLOWER UNIT

ATC-113

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Revision: 2004 November

2004 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 fixing nuts (2), then fixing bolts (2) and screw (1), then
remove blower unit.

CAUTION:

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

5.

Remove harness clips (2) from blower unit.

6.

Remove blower unit.

INSTALLATION

Installation is basically the reverse order of removal.

CAUTION:

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

RJIA1818E

RJIA1819E

ATC-114

BLOWER UNIT

Revision: 2004 November

2004 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

BLOWER MOTOR

ATC-115

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Revision: 2004 November

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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 screws from blower motor, and then remove it.

INSTALLATION

Installation is basically the reverse order of removal.

RJIA1822E

ATC-116

INTAKE DOOR MOTOR

Revision: 2004 November

2004 Murano

INTAKE DOOR MOTOR

PFP:27730

Removal and Installation

AJS000ZY

REMOVAL

1.

Remove blower unit. Refer to 

ATC-113, "BLOWER UNIT"

 .

2.

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

INSTALLATION

Installation is basically the reverse order of removal.

RJIA1823E

IN-CABIN MICROFILTER

ATC-117

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ATC

Revision: 2004 November

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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 the glove box.

REPLACEMENT PROCEDURES

1.

Remove the instrument passenger lower panel. Refer to 

IP-11, "Removal and Installation"

 .

2.

Remove the filter cover, and then remove the in-cabin microfil-
ter.

3.

Take out the in-cabin microfilter from blower unit.

4.

Replace with new one and reinstall on blower unit.

5.

Reinstall the glove box.

RJIA1331E

RJIA1824E

ATC-118

HEATER & COOLING UNIT ASSEMBLY

Revision: 2004 November

2004 Murano

HEATER & COOLING UNIT ASSEMBLY

PFP:27110

Removal and Installation

AJS00100

REMOVAL

1.

Use a refrigerant collecting equipment (for HFC-134a) to discharge 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: 92530-89908, Low-
pressure side: 92530-89916) 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:

Seal connection opening of piping with a cap or vinyl tape
to avoid exposure to atmosphere.

5.

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-113, "BLOWER UNIT"

 .

8.

Remove clips of vehicle harness from steering member.

9.

Remove instrument stays (driver side and passenger side).

10. Remove mounting bolts from heater & cooling unit.

RJIA1815E

RJIA1825E

RJIA1826E

RJIA1828E

HEATER & COOLING UNIT ASSEMBLY

ATC-119

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11. Remove rear ventilator duct1 and front floor duct. Refer to 

ATC-127, "Removal of Rear Ventilator Ducts"

and 

ATC-128, "Removal of Floor Ducts"

 .

12. Remove the steering member, and then remove heater & cooling unit.

INSTALLATION

Installation is basically the reverse order of removal.

CAUTION:

●

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

●

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.

NOTE:

●

When filling radiator with coolant, refer to 

CO-9, "Changing Engine Coolant"

 .

●

Recharge the refrigerant.

RJIA1827E

Heater & cooling unit mounting bolt

Tightening torque

: 6.8 N·m (0.69 kg-m, 60 in-lb) 

Steering member mounting nut and bolt

Tightening torque

: 12 N·m (1.2 kg-m, 9 ft-lb)

ATC-120

HEATER & COOLING UNIT ASSEMBLY

Revision: 2004 November

2004 Murano

Disassembly and Assembly

AJS00101

1.

Adaptor duct

2.

Heater  & cooling case (left)

3.

Mode door motor bracket

4.

Mode door motor

5.

Instrument lower cover bracket

6.

Aspirator

7.

Aspirator duct

8.

Sub harness

9.

Heater core

10. Foot duct (right)

11.

Heater core cover

12. Air mix door motor (passenger side)

13. Evaporator cover

14. Low-pressure pipe 2

15. High-pressure pipe 2

16. Cooler pipe grommet

17. Heater & cooling case (right)

18. Insulator

RJIA1829E