Nissan Murano Z51 (2008 year). Manual - part 163

 

  Index      Manuals     Nissan Murano Z51 (2008 year) - Service and Repair Manual

 

Search            copyright infringement  

 

 

 

 

 

 

 

 

Content      ..     161      162      163      164     ..

 

 

Nissan Murano Z51 (2008 year). Manual - part 163

 

 

EC-424

< COMPONENT DIAGNOSIS >

[VQ35DE]

P2138 APP SENSOR

Diagnosis Procedure

INFOID:0000000003388230

1.

CHECK GROUND CONNECTION

1.

Turn ignition switch OFF.

2.

Check ground connection E38. Refer to Ground Inspection in 

GI-43, "Circuit Inspection"

.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace ground connection.

2.

CHECK APP SENSOR 1 POWER SUPPLY CIRCUIT

1.

Disconnect accelerator pedal position (APP) sensor harness connector.

2.

Turn ignition switch ON.

3.

Check the voltage between APP sensor harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair open circuit, short to ground or short to power in harness or connectors.

3.

CHECK APP SENSOR 2 POWER SUPPLY CIRCUIT-I

1.

Turn ignition switch ON.

2.

Check the voltage between APP sensor harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 7.

NO

>> GO TO 4.

4.

CHECK APP SENSOR 2 POWER SUPPLY CIRCUIT-II

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Check the continuity between APP sensor harness connector and ECM harness connector.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Repair open circuit.

5.

CHECK SENSOR POWER SUPPLY CIRCUIT

Check harness for short to power and short to ground, between the following terminals.

APP sensor

Ground

Voltage (V)

Connector

Terminal

E110

4

Ground

Approx. 5

APP sensor

Ground

Voltage (V)

Connector

Terminal

E110

5

Ground

Approx. 5

APP sensor

ECM

Continuity

Connector

Terminal

Connector

Terminal

E110

5

E16

87

Existed

ECM

Sensor

Connector

Terminal

Name

Connector

Terminal

F8

72

Refrigerant pressure sensor

E300

1

76

CKP sensor (POS)

F20

1

Revision: 2008 October

2009 Murano

P2138 APP SENSOR

EC-425

< COMPONENT DIAGNOSIS >

[VQ35DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Repair short to ground or short to power in harness or connectors.

6.

CHECK COMPONENTS

Check the following.
• Crankshaft position sensor (POS) (Refer to 

EC-263, "Component Inspection"

.)

• EVAP control system pressure sensor (Refer to 

EC-302, "Component Inspection"

.)

• Refrigerant pressure sensor (Refer to 

EC-463, "Diagnosis Procedure"

.)

Is the inspection result normal?

YES

>> GO TO 11.

NO

>> Replace malfunctioning components.

7.

CHECK APP SENSOR GROUND CIRCUIT FOR OPEN AND SHORT

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Check the continuity between APP sensor harness connector and ECM harness connector.

4.

Also check harness for short to ground and short to power.

Is the inspection result normal?

YES

>> GO TO 8.

NO

>> Repair open circuit, short to ground or short to power in harness or connectors.

8.

CHECK APP SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1.

Check the continuity between APP sensor harness connector and ECM harness connector.

2.

Also check harness for short to ground and short to power.

Is the inspection result normal?

YES

>> GO TO 9.

NO

>> Repair open circuit, short to ground or short to power in harness or connectors.

9.

CHECK APP SENSOR

Refer to 

EC-426, "Component Inspection"

.

Is the inspection result normal?

YES

>> GO TO 11.

NO

>> GO TO 10.

10.

REPLACE ACCELERATOR PEDAL ASSEMBLY

1.

Replace accelerator pedal assembly.

2.

Refer to 

EC-426, "Special Repair Requirement"

.

E16

87

APP sensor

E110

5

91

EVAP control system pressure sensor

B17

3

ECM

Sensor

Connector

Terminal

Name

Connector

Terminal

APP sensor

ECM

Continuity

Connector

Terminal

Connector

Terminal

E110

2

E16

84

Existed

1

100

APP sensor

ECM

Continuity

Connector

Terminal

Connector

Terminal

E110

3

E16

81

Existed

6

82

Revision: 2008 October

2009 Murano

EC-426

< COMPONENT DIAGNOSIS >

[VQ35DE]

P2138 APP SENSOR

>> INSPECTION END

11.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-40, "Intermittent Incident"

.

>> INSPECTION END

Component Inspection

INFOID:0000000003591875

1.

CHECK ACCELERATOR PEDAL POSITION SENSOR

1.

Reconnect all harness connectors disconnected.

2.

Turn ignition switch ON.

3.

Check the voltage between ECM harness connector terminals under the following conditions.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> GO TO 2.

2.

REPLACE ACCELERATOR PEDAL ASSEMBLY

1.

Replace accelerator pedal assembly.

2.

Go to 

EC-426, "Special Repair Requirement"

.

>> INSPECTION END

Special Repair Requirement

INFOID:0000000003591879

1.

PERFORM ACCELERATOR PEDAL RELEASED POSITION LEARNING

Refer to 

EC-17, "ACCELERATOR PEDAL RELEASED POSITION LEARNING : Special Repair Requirement"

.

>> GO TO 2.

2.

PERFORM THROTTLE VALVE CLOSED POSITION LEARNING

Refer to 

EC-17, "THROTTLE VALVE CLOSED POSITION LEARNING : Special Repair Requirement"

.

>> GO TO 3.

3.

PERFORM IDLE AIR VOLUME LEARNING

Refer to 

EC-17, "IDLE AIR VOLUME LEARNING : Special Repair Requirement"

.

>> END

ECM

Condition

Voltage (V)

+

Connector

Terminal

Connector

Terminal

E16

81

(APP sensor 1 sig-

nal)

E16

84

(Sensor ground)

Accelerator pedal

Fully released

0.5 - 1.0

Fully depressed

4.2 - 4.8

82

(APP sensor 2 sig-

nal)

100

(Sensor ground)

Fully released

0.25 - 0.50

Fully depressed

2.0 - 2.5

Revision: 2008 October

2009 Murano

P2A00, P2A03 A/F SENSOR 1

EC-427

< COMPONENT DIAGNOSIS >

[VQ35DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

P2A00, P2A03 A/F SENSOR 1

Description

INFOID:0000000003591593

The air fuel ratio (A/F) sensor 1 is a planar one-cell limit current sen-
sor. The sensor element of the A/F sensor 1 is composed an elec-
trode layer, which transports ions. It has a heater in the element.
The sensor is capable of precise measurement   = 1, but also in the
lean and rich range. Together with its control electronics, the sensor
outputs a clear, continuous signal throughout a wide   range.
The exhaust gas components diffuse through the diffusion layer at
the sensor cell. An electrode layer is applied voltage, and this current
relative oxygen density in lean. Also this current relative hydrocar-
bon density in rich.

Therefore, the A/F sensor 1 is able to indicate air fuel ratio by this
electrode layer of current. In addition, a heater is integrated in the
sensor to ensure the required operating temperature of approxi-
mately 800

°

C (1,472

°

F).

DTC Logic

INFOID:0000000003388234

DTC DETECTION LOGIC

To judge the malfunction, the A/F signal computed by ECM from the A/F sensor 1 signal is monitored so it will
not shift to LEAN side or RICH side.

DTC CONFIRMATION PROCEDURE

1.

PRECONDITIONING

If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next test.
1.

Turn ignition switch OFF and wait at least 10 seconds.

2.

Turn ignition switch ON.

3.

Turn ignition switch OFF and wait at least 10 seconds.

TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 11 V at idle.

>> GO TO 2.

2.

PERFORM DTC CONFIRMATION PROCEDURE

1.

Clear the mixture ratio self-learning value. Refer to 

EC-19, "MIXTURE RATIO SELF-LEARNING VALUE

CLEAR : Special Repair Requirement"

.

2.

Turn ignition switch OFF and wait at least 10 seconds.

JMBIA0112GB

PBIB3354E

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible Cause

P2A00

Air fuel ratio (A/F) sensor 1 
(bank 1) circuit range/per-
formance

• The output voltage computed by ECM from the 

A/F sensor 1 signal shifts to the lean side for a 
specified period.

• The A/F signal computed by ECM from the A/F 

sensor 1 signal is shifts to the rich side for a 
specified period.

• A/F sensor 1
• A/F sensor 1 heater
• Fuel pressure
• Fuel injector
• Intake air leakage

P2A03

Air fuel ratio (A/F) sensor 1 
(bank 2) circuit range/per-
formance

Revision: 2008 October

2009 Murano

EC-428

< COMPONENT DIAGNOSIS >

[VQ35DE]

P2A00, P2A03 A/F SENSOR 1

3.

Turn ignition switch ON.

4.

Turn ignition switch OFF and wait at least 10 seconds.

5.

Start engine and keep the engine speed between 3,500 and 4,000 rpm for 1 minute under no load.

6.

Let engine idle for 1 minute.

7.

Keep engine speed between 2,500 and 3,000 rpm for 20 minutes.

8.

Check 1st trip DTC.

Is 1st trip DTC detected?

YES

>> Go to 

EC-428, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000003388235

1.

CHECK GROUND CONNECTION

1.

Turn ignition switch OFF.

2.

Check ground connection E38. Refer to Ground Inspection in 

GI-43, "Circuit Inspection"

.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace ground connection.

2.

RETIGHTEN A/F SENSOR 1

Loosen and retighten the A/F sensor 1. Refer to 

EM-34, "Removal and Installation"

.

>> GO TO 3.

3.

CHECK FOR INTAKE AIR LEAKAGE

1.

Start engine and run it at idle.

2.

Listen for an intake air leakage after the mass air flow sensor.

Is intake air leakage detected?

YES

>> GO TO 4.

NO

>> Repair or replace malfunctioning part.

4.

CLEAR THE MIXTURE RATIO SELF-LEARNING VALUE

1.

Clear the mixture ratio self-learning value. Refer to 

EC-19, "MIXTURE RATIO SELF-LEARNING VALUE

CLEAR : Special Repair Requirement"

.

2.

Run engine for at least 10 minutes at idle speed.

Is the 1st trip DTC P0171, P0172, P0174 or P0175 detected? Is it difficult to start engine?

YES

>> Perform trouble diagnosis for DTC P0171, P0174 or P0172, P0175. Refer to 

EC-226, "DTC Logic"

or 

EC-231, "DTC Logic"

.

NO

>> GO TO 5.

5.

CHECK HARNESS CONNECTOR

1.

Turn ignition switch OFF.

2.

Disconnect A/F sensor 1 harness connector.

3.

Check harness connector for water.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Repair or replace harness connector.

6.

CHECK AIR FUEL RATIO (A/F) SENSOR 1 POWER SUPPLY CIRCUIT

1.

Disconnect A/F sensor 1 harness connector.

2.

Turn ignition switch ON.

3.

Check the voltage between A/F sensor 1 harness connector and ground.

Water should not exit.

Revision: 2008 October

2009 Murano

P2A00, P2A03 A/F SENSOR 1

EC-429

< COMPONENT DIAGNOSIS >

[VQ35DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

Is the inspection result normal?

YES

>> GO TO 8.

NO

>> GO TO 7.

7.

DETECT MALFUNCTIONING PART

Check the following.
• IPDM E/R harness connector F12
• 15 A fuse (No. 46)
• Harness for open or short between A/F sensor 1 and IPDM E/R

>> Repair or replace harness or connectors.

8.

CHECK A/F SENSOR 1 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Check the continuity between A/F sensor 1 harness connector and ECM harness connector.

4.

Check the continuity between A/F sensor 1 harness connector and ground, or ECM harness connector
and ground.

5.

Also check harness for short to power.

Is the inspection result normal?

YES

>> GO TO 9.

NO

>> Repair open circuit, short to ground or short to power in harness or connectors.

9.

CHECK INTERMITTENT INCIDENT

DTC

A/F sensor

Ground

Voltage (V)

Bank

Connector

Terminal

P2A00

1

F27

4

Ground

Battery voltage

P2A03

2

F64

4

DTC

A/F sensor 1

ECM

Continuity

Bank

Connector

Terminal

Connector

Terminal

P2A00

1

F27

1

F8

45

Existed

2

49

P2A03

2

F64

1

53

2

57

DTC

A/F sensor 1

Ground

Continuity

Bank

Connector

Terminal

P2A00

1

F27

1

Ground

Not existed

2

P2A03

2

F64

1

2

DTC

ECM

Ground

Continuity

Connector

Terminal

P2A00

F8

45

Ground

Not existed

49

P2A03

53

57

Revision: 2008 October

2009 Murano

EC-430

< COMPONENT DIAGNOSIS >

[VQ35DE]

P2A00, P2A03 A/F SENSOR 1

Perform 

GI-40, "Intermittent Incident"

.

Is the inspection result normal?

YES

>> GO TO 10.

NO

>> Repair or replace malfunctioning part.

10.

REPLACE AIR FUEL RATIO (A/F) SENSOR 1

Replace malfunctioning air fuel ratio (A/F) sensor 1.

CAUTION:

• Discard any A/F sensor which has been dropped from a height of more than 0.5 m (19.7 in) onto a

hard surface such as a concrete floor; use a new one.

• Before installing new A/F sensor, clean exhaust system threads using Oxygen Sensor Thread

Cleaner [commercial service tool (J-43897-18 or J-43897-12)] and approved anti-seize lubricant
(commercial service tool).

>> INSPECTION END

Revision: 2008 October

2009 Murano

ASCD BRAKE SWITCH

EC-431

< COMPONENT DIAGNOSIS >

[VQ35DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

ASCD BRAKE SWITCH

Description

INFOID:0000000003591756

When the brake pedal is depressed, ASCD brake switch is turned OFF and stop lamp switch is turned ON.
ECM detects the state of the brake pedal by those two types of input (ON/OFF signal).
Refer to 

EC-51, "System Diagram"

 for the ASCD function.

Component Function Check

INFOID:0000000003388237

1.

CHECK ASCD BRAKE SWITCH FUNCTION

 With CONSULT-III

1.

Turn ignition switch ON.

2.

Select “BRAKE SW1” in “DATA MONITOR” mode with CONSULT-III.

3.

Check “BRAKE SW1” indication under the following conditions.

 Without CONSULT-III

1.

Turn ignition switch ON.

2.

Check the voltage between ECM harness connector terminals.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Go to 

EC-431, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000003388238

1.

CHECK ASCD BRAKE SWITCH POWER SUPPLY CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect ASCD brake switch harness connector.

3.

Turn ignition switch ON.

4.

Check the voltage between ASCD brake switch harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> GO TO 2.

2.

DETECT MALFUNCTIONING PART

Check the following.
• Fuse block (J/B) connector E103
• 10 A fuse (No.3)
• Harness for open or short between ASCD brake switch and fuse

Monitor item

Condition

Indication

BRAKE SW1

Brake pedal

Slightly depressed

OFF

Fully released

ON

ECM

Condition

Voltage

Connector

+

Terminal

Terminal

E16

110

(ASCD brake 

switch signal)

112

Brake pedal

Slightly depressed

Approx. 0 V

Fully released

Battery voltage

ASCD brake switch

Ground

Voltage

Connector

Terminal

E49

1

Ground

Battery voltage

Revision: 2008 October

2009 Murano

EC-432

< COMPONENT DIAGNOSIS >

[VQ35DE]

ASCD BRAKE SWITCH

>> Repair open circuit, short to ground or short to power in harness or connectors.

3.

CHECK ASCD BRAKE SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Check the continuity between ASCD brake switch harness connector and ECM harness connector.

4.

Also check harness for short to ground and short to power.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair open circuit, short to ground or short to power in harness or connectors.

4.

CHECK ASCD BRAKE SWITCH

Refer to 

EC-432, "Component Inspection (ASCD Brake Switch)"

.

Is the inspection result normal?

YES

>> GO TO 5.

NO

>> Replace ASCD brake switch.

5.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-40, "Intermittent Incident"

.

>> INSPECTION END

Component Inspection (ASCD Brake Switch)

INFOID:0000000003591752

1.

CHECK ASCD BRAKE SWITCH-I

1.

Turn ignition switch OFF.

2.

Disconnect ASCD brake switch harness connector.

3.

Check the continuity between ASCD brake switch terminals under the following conditions.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> GO TO 2.

2.

CHECK ASCD BRAKE SWITCH-II

1.

Adjust ASCD brake switch installation. Refer to 

BR-9, "Inspection and Adjustment"

.

2.

Check the continuity between ASCD brake switch terminals under the following conditions.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace ASCD brake switch.

ASCD brake switch

ECM

Continuity

Connector

Terminal

Connector

Terminal

E49

2

E16

110

Existed

Terminals

Condition

Continuity

1 and 2

Brake pedal

Fully released

Existed

Slightly depressed

Not existed

Terminals

Condition

Continuity

1 and 2

Brake pedal

Fully released

Existed

Slightly depressed

Not existed

Revision: 2008 October

2009 Murano

ASCD INDICATOR

EC-433

< COMPONENT DIAGNOSIS >

[VQ35DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

ASCD INDICATOR

Description

INFOID:0000000003388241

ASCD indicator lamp illuminates to indicate ASCD operation status. CRUISE is integrated in combination
meter.
CRUISE illuminates when MAIN switch on ASCD steering switch is turned ON to indicated that ASCD system
is ready for operation.
Refer to 

EC-51, "System Diagram"

 for the ASCD function.

Component Function Check

INFOID:0000000003388242

1.

CHECK ASCD INDICATOR FUNCTION

Check ASCD indicator under the following conditions.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Go to 

EC-433, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000003388243

1.

CHECK DTC

Check that DTC UXXXX is not displayed.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Perform trouble diagnosis for DTC UXXXX.

2.

CHECK COMBINATION METER FUNCTION

Refer to 

MWI-34, "CONSULT-III Function (METER/M&A)"

.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace malfunctioning part.

3.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-40, "Intermittent Incident"

.

Is the inspection result normal?

YES

>> Replace combination meter.

NO

>> Repair or replace malfunctioning part.

ASCD INDICATOR

CONDITION

SPECIFICATION

CRUISE

• Ignition switch: ON

• MAIN switch: Pressed at the 

1st time 

at the 2nd time

ON 

 OFF

Revision: 2008 October

2009 Murano

EC-434

< COMPONENT DIAGNOSIS >

[VQ35DE]

COOLING FAN

COOLING FAN

Description

INFOID:0000000003388244

The ECM controls the cooling fan corresponding to the vehicle speed, engine coolant temperature, refrigerant
pressure, and air conditioner ON signal. The control system has 4-step control [HIGH/MIDDLE/LOW/OFF].

COOLING FAN MOTOR

The cooling fan operates at each speed when the current flows in the cooling fan motor as per the following.

The cooling fan operates at low (LOW) speed when cooling fan motors-1 and -2 are circuited in series under
the middle speed condition.
Refer to 

EC-60, "System Diagram"

.

Component Function Check

INFOID:0000000003388245

1.

CHECK COOLING FAN FUNCTION

With CONSULT-III

1.

Turn ignition switch ON.

2.

Perform “COOLING FAN” in “ACTIVE TEST” mode with CONSULT-III.

3.

Check that cooling fan operates at each speed.

Without CONSULT-III

1.

Perform IPDM E/R auto active test and check cooling fan motors operation, refer to 

PCS-10, "Diagnosis

Description"

.

2.

Check that cooling fan operates at each speed.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Go to 

EC-434, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000003388246

1.

CHECK COOLING FAN RELAY POWER SUPPLY CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect cooling fan relays-2, -3.

3.

Turn ignition switch ON.

4.

Check the voltage between cooling fan relays-2, -3 harness connectors and ground.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> GO TO 2.

Cooling fan speed

Cooling fan motor terminals

(+)

(–)

Middle (MID)

1

3 and 4

2

3 and 4

1 and 2

3

1 and 2

4

High (HI)

1 and 2

3 and 4

Cooling fan relay

Ground

Voltage

Connector

Terminal

E57

(cooling fan relay-2)

2

Ground

Battery voltage

5

E59

(cooling fan relay-3)

2

5

Revision: 2008 October

2009 Murano

COOLING FAN

EC-435

< COMPONENT DIAGNOSIS >

[VQ35DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

2.

DETECT MALFUNCTIONING PART

Check the following.
• 40 A fusible link (letter K)
• 10 A fuse (No. 42)
• IPDM E/R harness connector E10
• Harness for open or short between cooling fan relay-2 and battery
• Harness for open or short between cooling fan relay-3 and battery
• Harness for open or short between cooling fan relay-2 and IPDM E/R
• Harness for open or short between cooling fan relay-3 and IPDM E/R

>> Repair open circuit, short to ground or short to power in harness or connectors.

3.

CHECK COOLING FAN RELAY OUTPUT SIGNAL CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect IPDM E/R harness connectors.

3.

Check the continuity between cooling fan relay-2, -3 harness connectors and IPDM E/R harness connec-
tor.

4.

Also check harness for short to ground and short to power.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair open circuit, short to ground or short to power in harness or connectors.

4.

CHECK COOLING FAN MOTOR POWER SUPPLY CIRCUIT

1.

Disconnect cooling fan motor-1 harness connector.

2.

Check the voltage between cooling fan motor-1 harness connector and ground.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> GO TO 5.

5.

DETECT MALFUNCTIONING PART

Check the following.
• Harness connector E70, E305
• 40 A fusible link (letter M)
• Harness for open or short between cooling fan motor-1 and battery

>> Repair open circuit, short to ground or short to power in harness or connectors.

6.

CHECK COOLING FAN MOTOR CIRCUIT-I

1.

Disconnect cooling fan motor-2 harness connector.

2.

Check the continuity between cooling fan relay-2, -3 harness connectors and cooling fan motor-1, -2 har-
ness connectors.

Cooling fan relay

IPDM E/R

Continuity

Connector

Terminal

Connector

Terminal

E57

(cooling fan relay-2)

1

E11

42

Existed

E59

(cooling fan relay-3)

1

E10

34

Cooling fan motor-1

Ground

Voltage

Connector

Terminal

E301

1

Ground

Battery voltage

2

Revision: 2008 October

2009 Murano

EC-436

< COMPONENT DIAGNOSIS >

[VQ35DE]

COOLING FAN

3.

Also check harness for short to ground and short to power.

Is the inspection result normal?

YES

>> GO TO 8.

NO

>> GO TO 7.

7.

DETECT MALFUNCTIONING PART

Check the following.
• Harness connector E70, E305
• Harness for open or short between cooling fan motor-1 and cooling fan relay-2
• Harness for open or short between cooling fan motor-1 and cooling fan relay-3
• Harness for open or short between cooling fan motor-2 and cooling fan relay-2
• Harness for open or short between cooling fan motor-2 and cooling fan relay-3

>> Repair open circuit, short to ground or short to power in harness or connectors.

8.

CHECK COOLING FAN MOTOR CIRCUIT-II

1.

Check the continuity between IPDM E/R harness connector and cooling fan motor-1, -2 harness connec-
tor.

2.

Also check harness for short to ground and short to power.

Is the inspection result normal?

YES

>> GO TO 10.

NO

>> GO TO 9.

9.

DETECT MALFUNCTIONING PART

Check the following.
• Harness connector E70, E305
• Harness for open or short between cooling fan motor-1 and IPDM E/R
• Harness for open or short between cooling fan motor-2 and IPDM E/R

>> Repair open circuit, short to ground or short to power in harness or connectors.

10.

CHECK COOLING FAN MOTOR CIRCUIT-III

1.

Check the continuity between cooling fan relay-2, -3 harness connectors and ground.

Cooling fan relay

Cooling fan motor

Continuity

Connector

Terminal

Connector

Terminal

E57

(cooling fan relay-2)

3

E302

(Cooling fan motor-2)

2

Existed

7

E301

(Cooling fan motor-1)

3

E59

(cooling fan relay-3)

3

E302

(Cooling fan motor-2)

1

7

E301

(Cooling fan motor-1)

4

IPDM E/R

Cooling fan motor

Continuity

Connector

Terminal

Connector

Terminal

E10

35

E301

(Cooling fan motor-1)

4

Existed

38

E302

(Cooling fan motor-2)

1

Revision: 2008 October

2009 Murano

COOLING FAN

EC-437

< COMPONENT DIAGNOSIS >

[VQ35DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

2.

Also check harness for short to ground and short to power.

Is the inspection result normal?

YES

>> GO TO 11.

NO

>> Repair open circuit, short to ground or short to power in harness or connectors.

11.

CHECK COOLING FAN MOTOR CIRCUIT-IV

1.

Check the continuity between cooling fan motor-2 harness connector and ground.

2.

Also check harness for short to ground and short to power.

Is the inspection result normal?

YES

>> GO TO 12.

NO

>> Repair open circuit, short to ground or short to power in harness or connectors.

12.

CHECK COOLING FAN RELAYS-2 AND -3

Refer to 

EC-438, "Component Inspection (Cooling Fan Relay)"

.

Is the inspection result normal?

YES

>> GO TO 13.

NO

>> Replace malfunctioning cooling fan relay.

13.

CHECK COOLING FAN MOTORS-1 AND -2

Refer to 

EC-437, "Component Inspection (Cooling Fan Motor)"

.

Is the inspection result normal?

YES

>> GO TO 14.

NO

>> Replace malfunctioning cooling fan motor.

14.

CHECK INTERMITTENT INCIDENT

Perfor

GI-40, "Intermittent Incident"

.

Is the inspection result normal?

YES

>> Replace IPDM E/R.

NO

>> Repair or replace harness connectors.

Component Inspection (Cooling Fan Motor)

INFOID:0000000003388247

1.

CHECK COOLING FAN MOTOR

1.

Turn ignition switch OFF.

2.

Disconnect cooling fan motor harness connector.

3.

Supply cooling fan motor terminals with battery voltage and check operation.

Cooling fan motor

Ground

Continuity

Connector

Terminal

E57

(cooling fan relay-2)

6

Ground

Existed

E59

(cooling fan relay-3)

6

Cooling fan motor-2

Ground

Continuity

Connector

Terminal

E302

3

Ground

Existed

4

Revision: 2008 October

2009 Murano

EC-438

< COMPONENT DIAGNOSIS >

[VQ35DE]

COOLING FAN

Check that cooling fan speed of condition B is higher than that of A.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace cooling fan motor.

Component Inspection (Cooling Fan Relay)

INFOID:0000000003388248

1.

CHECK COOLING FAN RELAY

1.

Disconnect cooling fan relays -2, -3 harness connectors.

2.

Check continuity between cooling fan relay -2, -3 terminals
under the following conditions.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Replace cooling fan relay.

Condition

Terminals

(+)

(

)

Cooling fan motor

A

1

3 and 4

2

3 and 4

1 and 2

3

1 and 2

4

B

1, 2

3, 4

Terminals

Conditions

Continuity

3 and 5
6 and 7

12 V direct current supply between terminals 1 and 2

Existed

No current supply

Not existed

SEF745U

Revision: 2008 October

2009 Murano

ELECTRICAL LOAD SIGNAL

EC-439

< COMPONENT DIAGNOSIS >

[VQ35DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

ELECTRICAL LOAD SIGNAL

Description

INFOID:0000000003388249

The electrical load signal (Headlamp switch signal, rear window defogger switch signal, etc.) is transferred via
the CAN communication.

Component Function Check

INFOID:0000000003388250

1.

CHECK REAR WINDOW DEFOGGER SWITCH FUNCTION

1.

Turn ignition switch ON.

2.

Connect CONSULT-III and select “DATA MONITOR” mode.

3.

Select “LOAD SIGNAL” and check indication under the following conditions.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Go to 

EC-439, "Diagnosis Procedure"

.

2.

CHECK LIGHTING SWITCH FUNCTION

Check “LOAD SIGNAL” indication under the following conditions.

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Go to 

EC-439, "Diagnosis Procedure"

.

3.

CHECK HEATER FAN CONTROL SWITCH FUNCTION

Select “HEATER FAN SW” and check indication under the following conditions.

Is the inspection result normal?

YES

>> INSPECTION END

NO

>> Go to 

EC-439, "Diagnosis Procedure"

.

Diagnosis Procedure

INFOID:0000000003388251

1.

INSPECTION START

Confirm the malfunctioning circuit (rear window defogger, headlamp or heater fan). Refer to 

EC-439, "Compo-

nent Function Check"

.

Which circuit is related to the incident?

Rear window defogger>>GO TO 2.
Headlamp>>GO TO 3.
Heater fan>>GO TO 4.

2.

CHECK REAR WINDOW DEFOGGER SYSTEM

Refer to 

DEF-3, "Work Flow"

.

Monitor item

Condition

Indication

LOAD SIGNAL

Rear window defogger switch

ON

ON

OFF

OFF

Monitor item

Condition

Indication

LOAD SIGNAL

Lighting switch

ON at 2nd position

ON

OFF

OFF

Monitor item

Condition

Indication

HEATER FAN SW

Heater fan control switch

ON

ON

OFF

OFF

Revision: 2008 October

2009 Murano

 

 

 

 

 

 

 

Content      ..     161      162      163      164     ..