Nissan Murano Z50 (2006 year). Manual - part 115

ASCD INDICATOR

EC-619

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2006 Murano

Diagnostic Procedure

NBS003EM

1. 

CHECK OVERALL FUNCTION

Check ASCD indicator under the following conditions.

OK or NG

OK

>> INSPECTION END

NG

>> GO TO 2.

2. 

CHECK DTC

Check that DTC U1000 or U1001 is not displayed.

OK or NG

OK

>> GO TO 3.

NG

>> Perform trouble diagnoses for DTC U1000, U1001. Refer to 

EC-152, "DTC U1000, U1001 CAN

COMMUNICATION LINE"

 .

3. 

CHECK DTC WITH “UNIFIED METER AND A/C AMP.”

Refer to 

DI-31, "SELF-DIAG RESULTS"

 .

OK or NG

OK

>> GO TO 4.

NG

>> Go to 

DI-34, "DTC [B2202] Meter Communication Circuit"

 .

4. 

CHECK INTERMITTENT INCIDENT

Refer to 

EC-142, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

 .

>> INSPECTION END

MONITOR ITEM

CONDITION

SPECIFICATION

CRUISE LAMP

●

Ignition switch: ON

MAIN switch: Pressed at the 1st time 

→

 at the 2nd time

ON 

→

 OFF

SET LAMP

●

MAIN switch: ON

●

When vehicle speed is between 
40 km/h (25 MPH) and 144 km/h 
(89 MPH)

ASCD: Operating

ON

ASCD: Not operating

OFF

EC-620

ELECTRICAL LOAD SIGNAL

Revision: 2006 August

2006 Murano

ELECTRICAL LOAD SIGNAL

PFP:25350

Description

NBS003EB

The electrical load signal (Headlamp switch signal, rear window defogger switch signal, etc.) is transferred
through the CAN communication line from BCM to ECM via IPDM E/R.

CONSULT-II Reference Value in Data Monitor Mode

NBS003EC

Specification data are reference values.

Diagnostic Procedure

NBS003ED

1. 

CHECK LOAD SIGNAL CIRCUIT OVERALL FUNCTION-I

1.

Turn ignition switch ON.

2.

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

3.

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

OK or NG

OK

>> GO TO 2.

NG

>> GO TO 4.

2. 

CHECK LOAD SIGNAL CIRCUIT OVERALL FUNCTION-II

Check “LOAD SIGNAL” indication under the following conditions.

OK or NG

OK

>> GO TO 3.

NG

>> GO TO 5.

MONITOR ITEM

CONDITION

SPECIFICATION

LOAD SIGNAL

●

Ignition switch: ON

Rear window defogger switch is ON 
and/or lighting switch is in 2nd.

ON

Rear window defogger switch is OFF 
and lighting switch is OFF.

OFF

HEATER FAN SW

●

Engine: After warming up, idle 
the engine

Heater fan: Operating

ON

Heater fan: Not operating

OFF

Condition

Indication

Rear window defogger switch: ON

ON

Rear window defogger switch: OFF

OFF

PBIB0103E

Condition

Indication

Lighting switch: ON at 2nd position

ON

Lighting switch: OFF

OFF

PBIB0103E

ELECTRICAL LOAD SIGNAL

EC-621

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3. 

CHECK HEATER FAN SIGNAL CIRCUIT OVERALL FUNCTION

Check “HEATER FAN SW” in “DATA MONITOR” mode with CON-
SULT-II under the following conditions.

OK or NG

OK

>> INSPECTION END.

NG

>> GO TO 6.

4. 

CHECK REAR WINDOW DEFOGGER SYSTEM

Refer to 

GW-75, "REAR WINDOW DEFOGGER"

 .

>> INSPECTION END

5. 

CHECK HEADLAMP SYSTEM

Refer to 

LT-6, "HEADLAMP - XENON TYPE -"

   or 

LT-36, "HEADLAMP -CONVENTIONAL TYPE-"

 .

>> INSPECTION END

6. 

CHECK HEATER FAN CONTROL SYSTEM

Refer to 

ATC-35, "TROUBLE DIAGNOSIS"

 .

>> INSPECTION END

Condition

LOAD SIGNAL

Heater fan control switch: ON

ON

Heater fan control switch: OFF

OFF

PBIB1995E

EC-622

ELECTRONIC CONTROLLED ENGINE MOUNT

Revision: 2006 August

2006 Murano

ELECTRONIC CONTROLLED ENGINE MOUNT

PFP:11270

System Description

NBS003E3

*: This signal is sent to the ECM through CAN communication line.

The ECM controls the engine mount operation corresponding to the engine speed and the vehicle speed. The
control system has 2-step control [Soft/Hard]

CONSULT-II Reference Value in Data Monitor Mode

NBS003E4

Specification data are reference values.

Sensor

Input Signal to ECM

ECM function

Actuator

Crankshaft position sensor (POS)
Camshaft position sensor (PHASE)

Engine speed

Engine mount 
control

Electronic controlled engine 
mount

Wheel sensor

Vehicle speed*

Vehicle condition

Engine mount control

Engine speed: Below 950 rpm

Soft

Engine speed: Above 950 rpm

Hard

MONITOR ITEM

CONDITION

SPECIFICATION

ENGINE MOUNT

●

Engine: After warming up

Engine speed: Below 950 rpm

IDLE

Engine speed: Above 950 rpm

TRVL

ELECTRONIC CONTROLLED ENGINE MOUNT

EC-623

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Wiring Diagram

NBS003E5

TBWB0822E

EC-624

ELECTRONIC CONTROLLED ENGINE MOUNT

Revision: 2006 August

2006 Murano

Specification data are reference values and are measured between each terminal and ground.

CAUTION:

Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.

Diagnostic Procedure

NBS003E6

1. 

INSPECTION START

Do you have CONSULT-II?

Yes or No

Yes

>> GO TO 2.

No

>> GO TO 3.

2. 

CHECK OVERALL FUNCTION

 With CONSULT-II

1.

Turn ignition switch ON.

2.

Select “ENGINE MOUNTING” in “ACTIVE TEST” mode with
CONSULT-II and touch “ON/OFF” on the CONSULT-II screen.

3.

Check that the motor operating sound is heard from front elec-
tronic controlled engine mount for about 0.5 seconds according
to the switching condition of “ENGINE MOUNTING”.

OK or NG

OK

>> INSPECTION END

NG >> GO 

TO 

4.

TER-

MINAL 

NO.

WIRE 

COLOR

ITEM

CONDITION

DATA (DC Voltage)

8

BR/W

Electronic controlled engine 
mount-1

[Engine is running]

●

Engine speed: Above 950 rpm.

BATTERY VOLTAGE
(11 - 14V)

[Engine is running]

●

For 2 seconds after engine speed is 950 
rpm or less.

0 - 1.0V

[Engine is running]

●

2 seconds after engine speed is 950 rpm or 
less.

2.0 - 3.0V

9

W/R

Electronic controlled engine 
mount-2

[Engine is running]

●

Engine speed: Below 950 rpm.

BATTERY VOLTAGE
(11 - 14V)

[Engine is running]

●

For 2 seconds after engine speed is 950 
rpm or more.

0 - 1.0V

[Engine is running]

●

2 seconds after engine speed is 950 rpm or 
more.

2.0 - 3.0V

SEC237C

ELECTRONIC CONTROLLED ENGINE MOUNT

EC-625

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3. 

CHECK OVERALL FUNCTION

 Without CONSULT-II

1.

Make sure that gear position is P or N.

2.

Start engine and let it idle.

3.

Change the engine speed from idle to more than 1,000 rpm and then return to idle (with vehicle stopped).

4.

Check that the motor operating sound is heard from front electronic controlled engine mount for about 0.5
seconds when changing engine speed.
It is better to hear the operating sound around the left side front wheel house.

OK or NG

OK

>> INSPECTION END

NG >> GO 

TO 

4.

4. 

CHECK ELECTRONIC CONTROLLED ENGINE MOUNT POWER SUPPLY CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect front or rear electronic controlled engine mount harness connector.

3.

Check voltage between electronic controlled engine mount ter-
minal 3 and ground with CONSULT-II or tester.

OK or NG

OK

>> GO TO 6.

NG

>> GO TO 5.

5. 

DETECT MALFUNCTIONING PART

Check the following.

●

Harness connectors M82, F102

●

10A fuse

●

Harness for open and short between electronic controlled engine mount and battery

>> Repair harness or connectors.

PBIB1373E

Voltage: Battery voltage

SEC920C

EC-626

ELECTRONIC CONTROLLED ENGINE MOUNT

Revision: 2006 August

2006 Murano

6. 

CHECK ELECTRONIC CONTROLLED ENGINE MOUNT OUTPUT SIGNAL CIRCUIT FOR OPEN AND 

SHORT

1.

Disconnect ECM harness connector.

2.

Check harness continuity between ECM terminals and electronic engine mount terminals as follows.
Refer to Wiring Diagram.

3.

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

OK or NG

OK

>> GO TO 7.

NG

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

7. 

CHECK ELECTRONIC CONTROLLED ENGINE MOUNT

Visually check front and rear electronic controlled engine mount.

OK or NG

OK

>> GO TO 8.

NG

>> Replace front or rear electronic controlled engine mount.

8. 

CHECK INTERMITTENT INCIDENT

Refer to 

EC-142, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

 .

>> INSPECTION END

ECM terminal

Front electronic controlled engine mount 

terminal

Rear electronic controlled engine mount 

terminal (AWD models)

8

1

1

9

2

2

Continuity should exist.

FUEL INJECTOR

EC-627

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FUEL INJECTOR

PFP:16600

Component Description

NBS003DR

The fuel injector is a small, precise solenoid valve. When the ECM
supplies a ground to the fuel injector circuit, the coil in the fuel injec-
tor is energized. The energized coil pulls the ball valve back and
allows fuel to flow through the fuel injector into the intake manifold.
The amount of fuel injected depends upon the injection pulse dura-
tion. Pulse duration is the length of time the fuel injector remains
open. The ECM controls the injection pulse duration based on
engine fuel needs.

CONSULT-II Reference Value in Data Monitor Mode

NBS003DS

Specification data are reference values.

SEF375Z

MONITOR ITEM

CONDITION

SPECIFICATION

B/FUEL SCHDL

●

See 

EC-132, "TROUBLE DIAGNOSIS - SPECIFICATION VALUE"

 .

INJ PULSE-B1
INJ PULSE-B2

●

Engine: After warming up

●

Shift lever: P or N

●

Air conditioner switch: OFF

●

No load

Idle

2.0 - 3.0 msec

2,000 rpm

1.9 - 2.9 msec

EC-628

FUEL INJECTOR

Revision: 2006 August

2006 Murano

Wiring Diagram

NBS003DT

TBWB0873E

FUEL INJECTOR

EC-629

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Specification data are reference values and are measured between each terminal and ground.
Pulse signal is measured by CONSULT-II.

CAUTION:

Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.

: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)

Diagnostic Procedure

NBS003DU

1. 

INSPECTION START

Turn ignition switch to START.
Is any cylinder ignited?

Yes or No

Yes (With CONSULT-II)>>GO TO 2.
Yes (Without CONSULT-II)>>GO TO 3.
No

>> GO TO 7.

2. 

CHECK OVERALL FUNCTION

 With CONSULT-II

1.

Start engine.

2.

Perform “POWER BALANCE” in “ACTIVE TEST” mode with
CONSULT-II.

3.

Make sure that each circuit produces a momentary engine
speed drop.

OK or NG

OK

>> INSPECTION END

NG

>> GO TO 7.

TER-

MINAL 

NO.

WIRE 

COLOR

ITEM

CONDITION

DATA (DC Voltage)

21
22
23
40
41
42

L/W
R/Y
R/B
R/G
L/Y
W/L

Fuel injector No. 5
Fuel injector No. 3
Fuel injector No. 1
Fuel injector No. 6
Fuel injector No. 4 
Fuel injector No. 2

[Engine is running]

●

Warm-up condition

●

Idle speed

NOTE:
The pulse cycle changes depending on rpm 
at idle.

BATTERY VOLTAGE

(11 - 14V)

[Engine is running]

●

Warm-up condition

●

Engine speed: 2,000 rpm.

BATTERY VOLTAGE

(11 - 14V)

SEC984C

SEC985C

PBIB0133E

EC-630

FUEL INJECTOR

Revision: 2006 August

2006 Murano

3. 

CHECK FUNCTION OF FUEL INJECTOR-I

 Without CONSULT-II

1.

Stop engine.

2.

Disconnect harness connector F29, F201.

3.

Turn ignition switch ON.

4.

Check voltage between harness connector F29 terminal 5 and
ground with CONSULT-II or tester.

5.

Turn ignition switch OFF.

6.

Disconnect ECM harness connector.

7.

Check harness continuity between harness connector F29 ter-
minals and ECM terminals as follows.
Refer to Wiring Diagram.

8.

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

OK or NG

OK

>> GO TO 5.

NG

>> GO TO 4.

4. 

DETECT MALFUNCTIONING PART

Check the following.

●

Harness connectors M82, F102

●

Fuse block (J/B) connector M1

●

10A fuse

●

Harness for open or short between harness connector F29 and fuse

●

Harness for open or short between harness connector F29 and ECM

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

PBIB2618E

Voltage: Battery voltage

Cylinder

Harness connector F29 

terminal

ECM terminal

1

6

23

3

2

22

5

1

21

Continuity should exist.

PBIB2323E

FUEL INJECTOR

EC-631

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5. 

CHECK FUNCTION OF FUEL INJECTOR-II

Provide battery voltage between harness connector F201 as follows
and then interrupt it. Listen to each fuel injector operating sound.

OK or NG

OK

>> GO TO 6.

NG

>> GO TO 7.

6. 

CHECK FUNCTION OF FUEL INJECTOR-III

1.

Reconnect all harness connector disconnected.

2.

Start engine.

3.

Listen to fuel injectors No. 2, No. 4, No.6 operating sound.

OK or NG

OK

>> INSPECTION END

NG

>> GO TO 7.

Cylinder

Harness connector F201 terminal

(+)

(–)

1

5

6

3

5

2

5

5

1

Operating sound should exist.

PBIB2324E

Clicking noise should exist.

PBIB1986E

EC-632

FUEL INJECTOR

Revision: 2006 August

2006 Murano

7. 

CHECK FUEL INJECTOR POWER SUPPLY CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect fuel injector harness connector.

3.

Turn ignition switch ON.

4.

Check voltage between fuel injector terminal 1 and ground with
CONSULT-II or tester.

OK or NG

OK

>> GO TO 9.

NG

>> GO TO 8.

8. 

DETECT MALFUNCTIONING PART

Check the following.

●

Harness connectors M82, F102

●

Harness connectors F201, F29

●

Fuse block (J/B) connector M1

●

10A fuse

●

Harness for open or short between fuel injector and fuse

>> Repair harness or connectors.

9. 

CHECK FUEL INJECTOR OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Check harness continuity between fuel injector terminal 2 and ECM terminals 21, 22, 23, 40, 41, 42. 
Refer to Wiring Diagram.

4.

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

OK or NG

OK

>> GO TO 11.

NG

>> GO TO 10.

PBIB3200E

Voltage: Battery voltage

PBIB0582E

Continuity should exist.

FUEL INJECTOR

EC-633

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10. 

DETECT MALFUNCTIONING PART

Check the following.

●

Harness connectors F29, F201

●

Harness for open or short between fuel injector and ECM

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

11. 

CHECK FUEL INJECTOR

Refer to 

EC-633, "Component Inspection"

 .

OK or NG

OK

>> GO TO 12.

NG

>> Replace fuel injector.

12. 

CHECK INTERMITTENT INCIDENT

Refer to 

EC-142, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

 .

>> INSPECTION END

Component Inspection

NBS003DV

FUEL INJECTOR

1.

Disconnect fuel injector harness connector.

2.

Check resistance between terminals as shown in the figure.

Removal and Installation

NBS003DW

FUEL INJECTOR

Refer to 

EM-41, "FUEL INJECTOR AND FUEL TUBE"

 .

Resistance: 11.1 - 14.5

Ω

 [at 10 - 60

°

C (50 - 140

°

F)]

PBIB1727E

EC-634

FUEL PUMP

Revision: 2006 August

2006 Murano

FUEL PUMP

PFP:17042

Description

NBS003DX

SYSTEM DESCRIPTION

*: ECM determines the start signal status by the signals of engine speed and battery voltage.

The ECM activates the fuel pump for 1 second after the ignition switch is turned ON to improve engine start-
ability. If the ECM receives a engine speed signal from the camshaft position sensor (PHASE), it knows that
the engine is rotating, and causes the pump to operate. If the engine speed signal is not received when the
ignition switch is ON, the engine stalls. The ECM stops pump operation and prevents battery discharging,
thereby improving safety. The ECM does not directly drive the fuel pump. It controls the ON/OFF fuel pump
relay, which in turn controls the fuel pump.

COMPONENT DESCRIPTION

A turbine type design fuel pump is used in the fuel tank.

CONSULT-II Reference Value in Data Monitor Mode

NBS003DY

Specification data are reference values.

Sensor

Input Signal to ECM

ECM Function

Actuator

Crankshaft position sensor (POS)
Camshaft position sensor (PHASE)

Engine speed*

Fuel pump control

Fuel pump relay

Battery

Battery voltage*

Condition

Fuel pump operation

Ignition switch is turned to ON.

Operates for 1 second.

Engine running and cranking

Operates.

When engine is stopped

Stops in 1.5 seconds.

Except as shown above

Stops.

PBIB1356E

MONITOR ITEM

CONDITION

SPECIFICATION

FUEL PUMP RLY

●

For 1 second after turning ignition switch ON

●

Engine running or cranking

ON

●

Except above conditions

OFF