Nissan Murano Z50 (2007 year). Manual - part 73

TROUBLE DIAGNOSIS

EC-117

C

D

E

F

G

H

I

J

K

L

M

A

EC

Revision: 2006 July

2007 Murano

MASS AIRFLOW [g·m/
s]

●

Indicates the mass air flow computed by 
ECM according to the signal voltage of 
the mass air flow sensor.

PURG VOL C/V [%]

●

Indicates the EVAP canister purge vol-
ume control solenoid valve control value 
computed by the ECM according to the 
input signals.

●

The opening becomes larger as the 
value increases.

INT/V TIM (B1) [

°

CA]

●

Indicates [

°

CA] of intake camshaft 

advanced angle. 

INT/V TIM (B2) [

°

CA]

INT/V SOL (B1) [%]

●

The control condition of the intake valve 
timing control solenoid valve (deter-
mined by ECM according to the input 
signals) is indicated.

●

The advance angle becomes larger as 
the value increases.

INT/V SOL (B2) [%]

VIAS S/V
[ON/OFF]

●

The control condition of the VIAS con-
trol solenoid valve (determined by ECM 
according to the input signals) is indi-
cated.
ON: VIAS control solenoid valve is oper-
ating.
OFF: VIAS control solenoid valve is not 
operating.

AIR COND RLY [ON/
OFF]

×

●

The air conditioner relay control condi-
tion (determined by ECM according to 
the input signals) is indicated.

ENGINE MOUNT
[IDLE/TRVL]

●

The control condition of the electronic 
controlled engine mount (determined by 
ECM according to the input signals) is 
indicated.
IDLE: Engine speed: Below 950 rpm
TRVL: Engine speed: Above 950 rpm

FUEL PUMP RLY [ON/
OFF]

×

●

Indicates the fuel pump relay control 
condition determined by ECM according 
to the input signals.

VENT CONT/V [ON/
OFF]

●

The control condition of the EVAP can-
ister vent control valve (determined by 
ECM according to the input signals) is 
indicated.
ON: Closed
OFF: Open

THRTL RELAY [ON/
OFF]

×

●

Indicates the throttle control motor relay 
control condition determined by the 
ECM according to the input signals.

COOLING FAN
[HI/LOW/OFF]

×

●

The control condition of the cooling fan 
(determined by ECM according to the 
input signals) is indicated.
HI: High speed operation
LOW: Low speed operation
OFF: Stop

Monitored item [Unit]

ECM 

INPUT 

SIG-

NALS

MAIN 

SIG-

NALS

Description

Remarks

EC-118

TROUBLE DIAGNOSIS

Revision: 2006 July

2007 Murano

HO2S2 HTR (B1) [ON/
OFF]

●

Indicates [ON/OFF] condition of heated 
oxygen sensor 2 heater determined by 
ECM according to the input signals.

HO2S2 HTR (B2) [ON/
OFF]

I/P PULLY SPD
[rpm]

●

Indicates the engine speed computed 
from the primary speed sensor signal.

VEHICLE SPEED
[km/h] or [MPH]

●

Indicates the vehicle speed computed 
from the secondary speed sensor sig-
nal.

IDL A/V LEARN [YET/
CMPLT]

●

Display the condition of idle air volume 
learning
YET: Idle air volume learning has not 
been performed yet.
CMPLT: Idle air volume learning has 
already been performed successfully.

TRVL AFTER MIL [km] 
or [mile]

●

Distance traveled while MIL is activated.

A/F S1 HTR (B1) [%]

●

A/F sensor 1 heater control value com-
puted by ECM according to the input 
signals.

●

The current flow to the heater becomes 
larger as the value increases.

A/F S1 HTR (B2) [%]

AC PRESS SEN [V]

●

The signal voltage from the refrigerant 
pressure sensor is displayed.

VHCL SPEED SE [km/
h] or [mph]

●

The vehicle speed computed from the 
vehicle speed signal sent from TCM is 
displayed.

SET VHCL SPD
[km/h] or [m.p.h.]

●

The preset vehicle speed is displayed.

MAIN SW
[ON/OFF]

●

Indicates [ON/OFF] condition from 
MAIN switch signal.

CANCEL SW
[ON/OFF]

●

Indicates [ON/OFF] condition from 
CANCEL switch signal.

RESUME/ACC SW
[ON/OFF]

●

Indicates [ON/OFF] condition from 
RESUME/ACCELERATE switch signal.

SET SW
[ON/OFF]

●

Indicates [ON/OFF] condition from SET/
COAST switch signal.

BRAKE SW1
[ON/OFF]

●

Indicates [ON/OFF] condition from 
ASCD brake switch signal.

BRAKE SW2
[ON/OFF]

●

Indicates [ON/OFF] condition of stop 
lamp switch signal.

VHCL SPD CUT
[NON/CUT]

●

Indicates the vehicle cruise condition.
NON: Vehicle speed is maintained at 
the ASCD set speed.
CUT: Vehicle speed increased to exces-
sively high compared with the ASCD set 
speed, and ASCD operation is cut off.

Monitored item [Unit]

ECM 

INPUT 

SIG-

NALS

MAIN 

SIG-

NALS

Description

Remarks

TROUBLE DIAGNOSIS

EC-119

C

D

E

F

G

H

I

J

K

L

M

A

EC

Revision: 2006 July

2007 Murano

NOTE:

●

Any monitored item that does not match the vehicle being diagnosed is deleted from the display automatically.

DATA MONITOR (SPEC) MODE
Monitored Item

LO SPEED CUT
[NON/CUT]

●

Indicates the vehicle cruise condition.
NON: Vehicle speed is maintained at 
the ASCD set speed.
CUT: Vehicle speed decreased to 
excessively low compared with the 
ASCD set speed, and ASCD operation 
is cut off.

AT OD MONITOR
[ON/OFF]

●

Indicates [ON/OFF] condition of CVT O/
D according to the input signal from the 
TCM.

AT OD CANCEL
[ON/OFF]

●

Indicates [ON/OFF] condition of CVT O/
D cancel signal sent from the TCM.

CRUISE LAMP
[ON/OFF]

●

Indicates [ON/OFF] condition of 
CRUISE lamp determined by the ECM 
according to the input signals.

SET LAMP
[ON/OFF]

●

Indicates [ON/OFF] condition of SET 
lamp determined by the ECM according 
to the input signals.

A/F ADJ-B1

●

Indicates the correction factor stored in 
ECM. The factor is calculated from the 
difference between the target air-fuel 
ratio stored in ECM and the air-fuel ratio 
calculated from A/F sensor 1 signal. 

A/F ADJ-B2

Voltage [V]

●

Voltage, frequency, duty cycle or pulse 
width measured by the probe.

●

Only # is displayed if item is unable to be 
measured.

●

Figures with #s are temporary ones. 
They are the same figures as an actual 
piece of data which was just previously 
measured.

Frequency [msec], 
[Hz] or [%]

DUTY-HI

DUTY-LOW

PLS WIDTH-HI

PLS WIDTH-LOW

Monitored item [Unit]

ECM 

INPUT 

SIG-

NALS

MAIN 

SIG-

NALS

Description

Remarks

Monitored item [Unit]

ECM 

INPUT 

SIG-

NALS

MAIN 

SIG-

NALS

Description

Remarks

ENG SPEED [rpm]

×

×

●

Indicates the engine speed computed 
from the signal of the crankshaft position 
sensor (POS) and camshaft position 
sensor (PHASE).

MAS A/F SE-B1 [V]

×

×

●

The signal voltage of the mass air flow 
sensor specification is displayed.

●

When engine is running specification 
range is indicated.

EC-120

TROUBLE DIAGNOSIS

Revision: 2006 July

2007 Murano

NOTE:
Any monitored item that does not match the vehicle being diagnosed is deleted from the display automatically.

ACTIVE TEST MODE
Test Item

B/FUEL SCHDL 
[msec]

×

●

Base fuel schedule indicates the fuel 
injection pulse width programmed into 
ECM, prior to any learned on board cor-
rection.

●

When engine is running specification 
range is indicated.

A/F ALPHA-B1 [%]
A/F ALPHA-B2 [%]

×

●

The mean value of the air-fuel ratio feed-
back correction factor per cycle is indi-
cated.

●

When engine is running specification 
range is indicated.

●

This data also includes the data for the 
air-fuel ratio learning control.

Monitored item [Unit]

ECM 

INPUT 

SIG-

NALS

MAIN 

SIG-

NALS

Description

Remarks

TEST ITEM

CONDITION

JUDGEMENT

CHECK ITEM (REMEDY)

FUEL INJEC-
TION

●

Engine: Return to the original 
trouble condition

●

Change the amount of fuel injec-
tion using CONSULT-II.

If trouble symptom disappears, see 
CHECK ITEM.

●

Harness and connectors

●

Fuel injector

●

Air fuel ratio (A/F) sensor 1

IGNITION TIM-
ING

●

Engine: Return to the original 
trouble condition

●

Timing light: Set

●

Retard the ignition timing using 
CONSULT-II.

If trouble symptom disappears, see 
CHECK ITEM.

●

Perform Idle Air Volume Learning.

POWER BAL-
ANCE

●

Engine: After warming up, idle 
the engine.

●

A/C switch: OFF

●

Shift lever: P or N

●

Cut off each fuel injector signal 
one at a time using CONSULT-II.

Engine runs rough or dies.

●

Harness and connectors

●

Compression

●

Fuel injector

●

Power transistor

●

Spark plug

●

Ignition coil

COOLING FAN*

●

Ignition switch: ON

●

Turn the cooling fan “HI”, “LOW” 
and “OFF” using CONSULT-II.

Cooling fan moves and stops.

●

Harness and connectors

●

Cooling fan motor

●

IPDM E/R

ENG COOLANT 
TEMP

●

Engine: Return to the original 
trouble condition

●

Change the engine coolant tem-
perature using CONSULT-II.

If trouble symptom disappears, see 
CHECK ITEM.

●

Harness and connectors

●

Engine coolant temperature sen-
sor

●

Fuel injector

FUEL PUMP 
RELAY

●

Ignition switch: ON (Engine 
stopped)

●

Turn the fuel pump relay “ON” 
and “OFF” using CONSULT-II 
and listen to operating sound.

Fuel pump relay makes the operat-
ing sound.

●

Harness and connectors

●

Fuel pump relay

VIAS SOL VALVE

●

Ignition switch: ON

●

Turn solenoid valve “ON” and 
“OFF” using CONSULT-II and lis-
ten to operating sound.

Solenoid valve makes the operating 
sound.

●

Harness and connectors

●

Solenoid valve

ENGINE 
MOUNTING

●

Ignition switch: ON

●

Turn electronic controlled engine 
mount “IDLE” and “TRVL” with 
the CONSULT-II.

Electronic controlled engine mount 
makes the operating sound.

●

Harness and connectors

●

Electronic controlled engine 
mount

TROUBLE DIAGNOSIS

EC-121

C

D

E

F

G

H

I

J

K

L

M

A

EC

Revision: 2006 July

2007 Murano

*: Leaving cooling fan OFF with CONSULT-II while engine is running may cause the engine to overheat.

DTC & SRT CONFIRMATION MODE
SRT STATUS Mode

For details, refer to 

EC-51, "SYSTEM READINESS TEST (SRT) CODE"

 .

SRT Work Support Mode

This mode enables a technician to drive a vehicle to set the SRT while monitoring the SRT status.

DTC Work Support Mode

*: DTC P1442 and P1456 does not apply to Z50 models but appears in DTC Work Support Mode screens.

PURG VOL 
CONT/V

●

Engine: After warming up, run 
engine at 1,500 rpm.

●

Change the EVAP canister purge 
volume control solenoid valve 
opening percent using CON-
SULT-II.

Engine speed changes according to 
the opening percent.

●

Harness and connectors

●

Solenoid valve

FUEL/T TEMP 
SEN

●

Change the fuel tank temperature using CONSULT-II.

VENT CON-
TROL/V

●

Ignition switch: ON (Engine 
stopped)

●

Turn solenoid valve ON and OFF 
with the CONSULT-II and listen 
to operating sound.

Solenoid valve makes an operating 
sound.

●

Harness and connectors

●

Solenoid valve

V/T ASSIGN 
ANGLE

●

Engine: Return to the original 
trouble condition

●

Change intake valve timing using 
CONSULT-II.

If trouble symptom disappears, see 
CHECK ITEM.

●

Harness and connectors

●

Intake valve timing control sole-
noid valve

TEST ITEM

CONDITION

JUDGEMENT

CHECK ITEM (REMEDY)

Test mode

Test item

Corresponding DTC No.

Reference page

EVAPORATIVE SYS-
TEM

EVP SML LEAK P0442/P1442*

P0442

EC-389

P0455

EC-444

EVP V/S LEAK P0456/P1456*

P0456

EC-452

PURG VOL CN/V P1444

P0443

EC-398

PURG FLOW P0441

P0441

EC-384

A/F SEN1

A/F SEN1 (B1) P1278/P1279

P0133

EC-258

A/F SEN1 (B1) P1276

P0130

EC-227

A/F SEN1 (B2) P1288/P1289

P0153

EC-258

A/F SEN1 (B2) P1286

P0150

EC-227

HO2S2

HO2S2 (B1) P1146

P0138

EC-282

HO2S2 (B1) P1147

P0137

EC-271

HO2S2 (B1) P0139

P0139

EC-295

HO2S2 (B2) P1166

P0158

EC-282

HO2S2 (B2) P1167

P0157

EC-271

HO2S2 (B2) P0159

P0159

EC-295

EC-122

TROUBLE DIAGNOSIS

Revision: 2006 July

2007 Murano

REAL TIME DIAGNOSIS IN DATA MONITOR MODE (RECORDING VEHICLE DATA)
Description

CONSULT-II has two kinds of triggers and they can be selected by touching “SETTING” in “DATA MONITOR”
mode.

1.

“AUTO TRIG” (Automatic trigger):

●

The malfunction will be identified on the CONSULT-II screen
in real time.
In other words, DTC/1st trip DTC and malfunction item will be
displayed if the malfunction is detected by ECM.
At the moment a malfunction is detected by ECM, “MONI-
TOR” in “DATA MONITOR” screen is changed to “Recording
Data ... xx%” as shown at right, and the data after the mal-
function detection is recorded. Then when the percentage
reached 100%, “REAL-TIME DIAG” screen is displayed. If
“STOP” is touched on the screen during “Recording Data ...
xx%”, “REAL-TIME DIAG” screen is also displayed.
The recording time after the malfunction detection and the
recording speed can be changed by “TRIGGER POINT” and
“Recording Speed”. Refer to CONSULT-II OPERATION MAN-
UAL.

2.

“MANU TRIG” (Manual trigger):

●

DTC/1st trip DTC and malfunction item will not be displayed
automatically on CONSULT-II screen even though a malfunc-
tion is detected by ECM.
DATA MONITOR can be performed continuously even though
a malfunction is detected.

SEF705Y

SEF707X

TROUBLE DIAGNOSIS

EC-123

C

D

E

F

G

H

I

J

K

L

M

A

EC

Revision: 2006 July

2007 Murano

Operation

1.

“AUTO TRIG”

●

While trying to detect the DTC/1st trip DTC by performing the DTC Confirmation Procedure, be sure to
select to “DATA MONITOR (AUTO TRIG)” mode. You can confirm the malfunction at the moment it is
detected.

●

While narrowing down the possible causes, CONSULT-II should be set in “DATA MONITOR (AUTO
TRIG)” mode, especially in case the incident is intermittent.
When you are inspecting the circuit by gently shaking (or twisting) the suspicious connectors, compo-
nents and harness in the DTC Confirmation Procedure, the moment a malfunction is found the DTC/1st
trip DTC will be displayed. (Refer to INCIDENT SIMULATION TESTS in 

GI-27, "How to Perform Effi-

cient Diagnosis for an Electrical Incident"

 .)

2.

“MANU TRIG”

●

If the malfunction is displayed as soon as “DATA MONITOR” is selected, reset CONSULT-II to “MANU
TRIG”. By selecting “MANU TRIG” you can monitor and store the data. The data can be utilized for fur-
ther diagnosis, such as a comparison with the value for the normal operating condition.

Generic Scan Tool (GST) Function

NBS002ZO

DESCRIPTION

Generic Scan Tool (OBDII scan tool) complying with SAE J1978 has
8 different functions explained below.
ISO9141 is used as the protocol.
The name GST or Generic Scan Tool is used in this service manual.

PBIB0197E

SEF139P

EC-124

TROUBLE DIAGNOSIS

Revision: 2006 July

2007 Murano

FUNCTION

INSPECTION PROCEDURE

1.

Turn ignition switch OFF.

2.

Connect GST to data link connector, which is located under LH
dash panel near the hood opener handle.

Diagnostic test mode

Function

Service $01

READINESS TESTS

This diagnostic service gains access to current emission-related data values, including 
analog inputs and outputs, digital inputs and outputs, and system status information.

Service $02

(FREEZE DATA)

This diagnostic service gains access to emission-related data value which were stored by 
ECM during the freeze frame. For details, refer to 

EC-51, "FREEZE FRAME DATA AND 

1ST TRIP FREEZE FRAME DATA"

 .

Service $03

DTCs

This diagnostic service gains access to emission-related power train trouble codes which 
were stored by ECM.

Service $04

CLEAR DIAG INFO

This diagnostic service can clear all emission-related diagnostic information. This 
includes:

●

Clear number of diagnostic trouble codes (Service $01)

●

Clear diagnostic trouble codes (Service $03)

●

Clear trouble code for freeze frame data (Service $01)

●

Clear freeze frame data (Service $02)

●

Reset status of system monitoring test (Service $01)

●

Clear on board monitoring test results (Service $06 and $07)

Service $06

(ON BOARD TESTS)

This diagnostic service accesses the results of on board diagnostic monitoring tests of 
specific components/systems that are not continuously monitored.

Service $07

(ON BOARD TESTS)

This diagnostic service enables the off board test drive to obtain test results for emission-
related powertrain components/systems that are continuously monitored during normal 
driving conditions.

Service $08

—

This diagnostic service can close EVAP system in ignition switch ON position (Engine 
stopped). When this diagnostic service is performed, the EVAP canister vent control 
valve can be closed.
In the following conditions, this diagnostic service cannot function.

●

Low ambient temperature

●

Low battery voltage

●

Engine running

●

Ignition switch OFF

●

Low fuel temperature

●

Too much pressure is applied to EVAP system

Service $09

(CALIBRATION ID)

This diagnostic service enables the off-board test device to request specific vehicle infor-
mation such as Vehicle Identification Number (VIN) and Calibration IDs.

PBIB1300E

TROUBLE DIAGNOSIS

EC-125

C

D

E

F

G

H

I

J

K

L

M

A

EC

Revision: 2006 July

2007 Murano

3.

Turn ignition switch ON.

4.

Enter the program according to instruction on the screen or in
the operation manual.
(*: Regarding GST screens in this section, sample screens are
shown.)

5.

Perform each diagnostic mode according to each service proce-
dure.
For further information, see the GST Operation Manual of
the tool maker.

SEF398S

SEF416S

EC-126

TROUBLE DIAGNOSIS

Revision: 2006 July

2007 Murano

CONSULT-II Reference Value in Data Monitor

NBS002ZP

Remarks:

●

 Specification data are reference values.

●

 Specification data are output/input values which are detected or supplied by the ECM at the connector.

* Specification data may not be directly related to their components signals/values/operations.
i.e. Adjust ignition timing with a timing light before monitoring IGN TIMING, because the monitor may show the specification data in

spite of the ignition timing not being adjusted to the specification data. This IGN TIMING monitors the data calculated by the ECM
according to the signals input from the camshaft position sensor and other ignition timing related sensors.

MONITOR ITEM

CONDITION

SPECIFICATION

ENG SPEED

●

Run engine and compare CONSULT-II value with the tachometer indica-
tion.

Almost the same speed as the 
tachometer indication.

MAS A/F SE-B1

●

See 

EC-131, "TROUBLE DIAGNOSIS - SPECIFICATION VALUE"

 .

B/FUEL SCHDL

●

See 

EC-131, "TROUBLE DIAGNOSIS - SPECIFICATION VALUE"

 .

A/F ALPHA-B1
A/F ALPHA-B2

●

See 

EC-131, "TROUBLE DIAGNOSIS - SPECIFICATION VALUE"

 .

COOLAN TEMP/S

●

Engine: After warming up

More than 70

°

C (158

°

F)

A/F SEN1 (B1)
A/F SEN1 (B2)

●

Engine: After warming up

Maintaining engine speed at 2,000 
rpm

Fluctuates around 1.5 V

HO2S2 (B1)
HO2S2 (B2)

●

Revving engine from idle to 3,000 rpm quickly after the following condi-
tions are met

–

Engine: After warming up

–

Keeping the engine speed between 3,500 and 4,000 rpm for 1 minute and 
at idle for 1 minute under no load

0 - 0.3V 

←→

 Approx. 0.6 - 

1.0V

HO2S2 MNTR (B1)
HO2S2 MNTR (B2)

LEAN 

←→

 RICH

VHCL SPEED SE

●

Turn drive wheels and compare CONSULT-II value with the speedometer 
indication.

Almost the same speed as the 
speedometer indication

BATTERY VOLT

●

Ignition switch: ON (Engine stopped)

11 - 14V

ACCEL SEN 1
ACCEL SEN 2*

●

Ignition switch: ON
(Engine stopped)

Accelerator pedal: Fully released

0.5 - 1.0V

Accelerator pedal: Fully depressed

4.2 - 4.8V

THRTL SEN 1
THRTL SEN 2*

●

Ignition switch: ON
(Engine stopped)

●

Shift lever: D

Accelerator pedal: Fully released

More than 0.36V

Accelerator pedal: Fully depressed

Less than 4.75V

EVAP SYS PRES

●

Ignition switch: ON

Approx. 1.8 - 4.8V

START SIGNAL

●

Ignition switch: ON 

→

 START 

→

 ON

OFF 

→

 ON 

→

 OFF

CLSD THL POS

●

Ignition switch: ON
(Engine stopped)

Accelerator pedal: Fully released

ON

Accelerator pedal: Slightly depressed

OFF

AIR COND SIG

●

Engine: After warming up, idle 
the engine

Air conditioner switch: OFF

OFF

Air conditioner switch: ON
(Compressor operates.)

ON

P/N POSI SW

●

Ignition switch: ON

Shift lever: P or N

ON

Shift lever: Except above

OFF

PW/ST SIGNAL

●

Engine: After warming up, idle 
the engine

Steering wheel: Not being turned

OFF

Steering wheel: Being turned

ON

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

IGNITION SW

●

Ignition switch: ON 

→

 OFF 

→

 ON

ON 

→

 OFF 

→

 ON

HEATER FAN SW

●

Engine: After warming up, idle 
the engine

Heater fan: Operating

ON

Heater fan: Not operating

OFF

BRAKE SW

●

Ignition switch: ON

Brake pedal: Fully released

OFF

Brake pedal: Slightly depressed

ON

TROUBLE DIAGNOSIS

EC-127

C

D

E

F

G

H

I

J

K

L

M

A

EC

Revision: 2006 July

2007 Murano

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

IGN TIMING

●

Engine: After warming up

●

Shift lever: P or N

●

Air conditioner switch: OFF

●

No load

Idle

13

°

 - 18

°

 BTDC

2,000 rpm

25

°

 - 45

°

 BTDC

CAL/LD VALUE

●

Engine: After warming up

●

Shift lever: P or N

●

Air conditioner switch: OFF

●

No load

Idle

5% - 35%

2,500 rpm

5% - 35%

MASS AIRFLOW

●

Engine: After warming up

●

Shift lever: P or N

●

Air conditioner switch: OFF

●

No load

Idle

2.0 - 6.0 g·m/s

2,500 rpm

7.0 - 20.0 g·m/s

PURG VOL C/V

●

Engine: After warming up

●

Shift lever: P or N

●

Air conditioner switch: OFF

●

No load

Idle
(Accelerator pedal is not depressed 
even slightly, after engine starting)

0%

2,000 rpm

—

INT/V TIM (B1)
INT/V TIM (B2)

●

Engine: After warming up

●

Shift lever: P or N

●

Air conditioner switch: OFF

●

No load

Idle

−

5

°

 - 5

°

CA

2,000 rpm

Approx. 0

°

 - 30

°

CA

INT/V SOL (B1)
INT/V SOL (B2)

●

Engine: After warming up

●

Shift lever: P or N

●

Air conditioner switch: OFF

●

No load

Idle

0% - 2%

2,000 rpm

Approx. 0% - 50%

VIAS S/V

●

Engine: After warming up

1,800 - 3,600 rpm

ON

Except above conditions

OFF

AIR COND RLY

●

Engine: After warming up, idle 
the engine

Air conditioner switch: OFF

OFF

Air conditioner switch: ON
(Compressor operates)

ON

ENGINE MOUNT

●

Engine: After warming up

Below 950 rpm

IDLE

Above 950 rpm

TRVL

FUEL PUMP RLY

●

For 1 second after turning ignition switch ON

●

Engine running or cranking

ON

●

Except above conditions

OFF

VENT CONT/V

●

Ignition switch: ON

OFF

THRTL RELAY

●

Ignition switch: ON

ON

COOLING FAN

●

Engine: After warming up, idle 
the engine

●

Air conditioner switch: OFF

Engine coolant temperature is 97

°

C 

(206

°

F) or less

OFF

Engine coolant temperature is 
between 95

°

C (203

°

F) and 98

°

C 

(208

°

F)

LOW

Engine coolant temperature is 100

°

C 

(212

°

F) or more

HI

MONITOR ITEM

CONDITION

SPECIFICATION

EC-128

TROUBLE DIAGNOSIS

Revision: 2006 July

2007 Murano

*: Accelerator pedal position sensor 2 signal and throttle position sensor 2 signal are converted by ECM internally. Thus, they differ from
ECM terminals voltage signal.

HO2S2 HTR (B1)
HO2S2 HTR (B2)

●

Engine speed: Below 3,600 rpm after the following conditions are met.

–

Engine: After warming up

–

Keeping the engine speed between 3,500 and 4,000 rpm for 1 minute and 
at idle for 1 minute under no load

ON

●

Engine speed: Above 3,600 rpm

OFF

I/P PULLY SPD

●

Vehicle speed: More than 20 km/h (12 MPH)

Almost the same speed as the 
tachometer indication

VEHICLE SPEED

●

Turn drive wheels and compare CONSULT-II value with the speedometer 
indication.

Almost the same speed as the 
speedometer indication

TRVL AFTER MIL

●

Ignition switch: ON

Vehicle has traveled after MIL has 
turned ON.

0 - 65,535 km
(0 - 40,723 mile)

A/F S1 HTR (B1)
A/F S1 HTR (B2)

●

Engine: After warming up, idle the engine

0 - 100%

AC PRESS SEN

●

Engine: Idle

●

Both A/C switch and blower fan switch: ON (Compressor operates)

1.0 - 4.0V

VHCL SPEED SE

●

Turn drive wheels and compare CONSULT-II value with the speedometer 
indication.

Almost the same speed as the 
speedometer indication

SET VHCL SPD

●

Engine: Running

ASCD: Operating.

The preset vehicle speed is 
displayed.

MAIN SW

●

Ignition switch: ON

MAIN switch: Pressed

ON

MAIN switch: Released

OFF

CANCEL SW

●

Ignition switch: ON

CANCEL switch: Pressed

ON

CANCEL switch: Released

OFF

RESUME/ACC SW

●

Ignition switch: ON

RESUME/ACCELERATE switch: 
Pressed

ON

RESUME/ACCELERATE switch: 
Released

OFF

SET SW

●

Ignition switch: ON

SET/COAST switch: Pressed

ON

SET/COAST switch: Released

OFF

BRAKE SW1

●

Ignition switch: ON

Brake pedal: Fully released

ON

Brake pedal: Slightly depressed

OFF

BRAKE SW2

●

Ignition switch: ON

Brake pedal: Fully released

OFF

Brake pedal: Slightly depressed

ON

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

MONITOR ITEM

CONDITION

SPECIFICATION

TROUBLE DIAGNOSIS

EC-129

C

D

E

F

G

H

I

J

K

L

M

A

EC

Revision: 2006 July

2007 Murano

Major Sensor Reference Graph in Data Monitor Mode

NBS002ZQ

The following are the major sensor reference graphs in “DATA MONITOR” mode.

CLSD THL POS, ACCEL SEN 1, THRTL SEN 1

Below is the data for “CLSD THL POS”, “ACCEL SEN 1” and “THRTL SEN 1” when depressing the accelera-
tor pedal with the ignition switch ON and with shift lever in D position.
The signal of “ACCEL SEN 1” and “THRTL SEN 1” should rise gradually without any intermittent drop or rise
after “CLSD THL POS” is changed from ON to OFF.

ENG SPEED, MAS A/F SE-B1, THRTL SEN 1, HO2S2 (B1), INJ PULSE-B1

Below is the data for “ENG SPEED”, “MAS A/F SE-B1”, “THRTL SEN 1”, “HO2S2 (B1)” and “INJ PULSE-B1”
when revving engine quickly up to 4,800 rpm under no load after warming up engine sufficiently.
Each value is for reference, the exact value may vary.

PBIB0198E

PBIB2445E

EC-130

TROUBLE DIAGNOSIS

Revision: 2006 July

2007 Murano

PBIB2099E

TROUBLE DIAGNOSIS - SPECIFICATION VALUE

EC-131

C

D

E

F

G

H

I

J

K

L

M

A

EC

Revision: 2006 July

2007 Murano

TROUBLE DIAGNOSIS - SPECIFICATION VALUE

PFP:00031

Description

NBS002ZR

The specification (SP) value indicates the tolerance of the value that is displayed in “DATA MONITOR (SPEC)”
mode of CONSULT-II during normal operation of the Engine Control System. When the value in “DATA MONI-
TOR (SPEC)” mode is within the SP value, the Engine Control System is confirmed OK. When the value in
“DATA MONITOR (SPEC)” mode is NOT within the SP value, the Engine Control System may have one or
more malfunctions.
The SP value is used to detect malfunctions that may affect the Engine Control System, but will not light the
MIL.
The SP value will be displayed for the following three items:

●

B/FUEL SCHDL (The fuel injection pulse width programmed into ECM prior to any learned on board cor-
rection)

●

A/F ALPHA-B1/B2 (The mean value of air-fuel ratio feedback correction factor per cycle)

●

MAS A/F SE-B1 (The signal voltage of the mass air flow sensor)

Testing Condition

NBS002ZS

●

Vehicle driven distance: More than 5,000 km (3,107 miles)

●

Barometric pressure: 98.3 - 104.3 kPa (1.003 - 1.064 kg/cm

2

 , 14.25 - 15.12 psi)

●

Atmospheric temperature: 20 - 30

°

C (68 - 86

°

F)

●

Engine coolant temperature: 75 - 95

°

C (167 - 203

°

F)

●

Transmission: Warmed-up

–

After the engine is warmed up to normal operating temperature, drive vehicle until “FLUID TEMP SE”
(CVT fluid temperature sensor signal) indicates more than 60

°

C (140

°

F).

●

Electrical load: Not applied

–

Rear window defogger switch, air conditioner switch, lighting switch are OFF. Steering wheel is straight
ahead.

●

Engine speed: Idle

Inspection Procedure

NBS002ZT

NOTE:
Perform “DATA MONITOR (SPEC)” mode in maximum scale display.
1.

Perform 

EC-68, "Basic Inspection"

 .

2.

Confirm that the testing conditions indicated above are met.

3.

Select “B/FUEL SCHDL”, “A/F ALPHA-B1”, “A/F ALPHA-B2”
and “MAS A/F SE-B1” in “DATA MONITOR (SPEC)” mode with
CONSULT-II.

4.

Make sure that monitor items are within the SP value.

5.

If NG, go to 

EC-132, "Diagnostic Procedure"

 .

SEF601Z

EC-132

TROUBLE DIAGNOSIS - SPECIFICATION VALUE

Revision: 2006 July

2007 Murano

Diagnostic Procedure

NBS002ZU

OVERALL SEQUENCE

PBIB2268E