Nissan Murano Z50 (2003 year). Manual

TROUBLE DIAGNOSIS

EC-127

Revision; 2004 April

2003 Murano

X: Applicable
*1: This item includes 1st trip DTCs.
*2: This mode includes 1st trip freeze frame data or freeze frame data. The items appear on CONSULT-II screen in freeze frame data
mode only if a 1st trip DTC or DTC is detected. For details, refer to

EC-74

INSPECTION PROCEDURE

CAUTION:

If CONSULT-II is used with no connection of CONSULT-II CONVERTER, malfunctions might be
detected in self-diagnosis depending on control unit which carry out CAN communication.
1.

Turn ignition switch “OFF”.

Connect “CONSULT-II” and “CONSULT-II CONVERTER” to
data link connector, which is located under LH dash panel near
the hood opener handle.

Turn ignition switch “ON”.

ENGINE CONTROL

COMPONENT P

ARTS

OUTPUT

Injectors

Power transistor (Ignition timing)

Throttle control motor relay

Throttle control motor

EVAP canister purge volume con-
trol solenoid valve

Air conditioner relay

Fuel pump relay

Cooling fan relay

Heated oxygen sensor 1 heater

Heated oxygen sensor 2 heater

EVAP canister vent control valve

Intake valve timing control solenoid
valve

VIAS control solenoid valve

Electronic controlled engine mount

Calculated load value

Item

DIAGNOSTIC TEST MODE

WORK

SUP-

PORT

SELF-DIAGNOSTIC

RESULTS

DATA

MONI-

TOR

DATA

MONI-

TOR

(SPEC)

ACTIVE

TEST

DTC & SRT

CONFIRMATION

DTC*1

FREEZE

FRAME
DATA*2

SRT

STATUS

DTC

WORK

SUP-

PORT

PBIB1300E

EC-128

TROUBLE DIAGNOSIS

Revision; 2004 April

2003 Murano

Touch “START (NISSAN BASED VHCL)”.

Touch “ENGINE”.
If “ENGINE” is not indicated, go to

GI-38, "CONSULT-II Data

Link Connector (DLC) Circuit"

Perform each diagnostic test mode according to each service
procedure.

For further information, see the CONSULT-II Operation Manual.

WORK SUPPORT MODE
Work Item

MBIB0233E

SEF995X

PBIB2308E

WORK ITEM

CONDITION

USAGE

FUEL PRESSURE RELEASE

●

FUEL PUMP WILL STOP BY TOUCHING “START” DUR-
ING IDLING.
CRANK A FEW TIMES AFTER ENGINE STALLS.

When releasing fuel pressure
from fuel line

IDLE AIR VOL LEARN

●

THE IDLE AIR VOLUME THAT KEEPS THE ENGINE
WITHIN THE SPECIFIED RANGE IS MEMORIZED IN
ECM.

When learning the idle air volume

SELF-LEARNING CONT

●

THE COEFFICIENT OF SELF-LEARNING CONTROL
MIXTURE RATIO RETURNS TO THE ORIGINAL COEF-
FICIENT.

When clearing the coefficient of
self-learning control value

TROUBLE DIAGNOSIS

EC-129

Revision; 2004 April

2003 Murano

*: This function is not necessary in the usual service procedure.

SELF-DIAG RESULTS MODE
Self Diagnostic Item

Regarding items of “DTC and 1st trip DTC”, refer to

EC-8, "INDEX FOR DTC"

Freeze Frame Data and 1st Trip Freeze Frame Data

EVAP SYSTEM CLOSE

CLOSE THE EVAP CANISTER VENT CONTROL VALVE IN
ORDER TO MAKE EVAP SYSTEM CLOSE UNDER THE
FOLLOWING CONDITIONS.

●

IGN SW “ON”

●

ENGINE NOT RUNNING

●

AMBIENT TEMPERATURE IS ABOVE 0

C (32

F).

●

NO VACUUM AND NO HIGH PRESSURE IN EVAP SYS-
TEM

●

FUEL TANK TEMP. IS MORE THAN 0

C (32

F).

●

WITHIN 10 MINUTES AFTER STARTING “EVAP SYS-
TEM CLOSE”

●

WHEN TRYING TO EXECUTE “EVAP SYSTEM CLOSE”
UNDER THE CONDITION EXCEPT ABOVE, CONSULT-
II WILL DISCONTINUE IT AND DISPLAY APPROPRI-
ATE INSTRUCTION.

NOTE:
WHEN STARTING ENGINE, CONSULT-II MAY DISPLAY
“BATTERY VOLTAGE IS LOW. CHARGE BATTERY”,
EVEN IN USING CHARGED BATTERY.

When detecting EVAP vapor leak
point of EVAP system

TARGET IDLE RPM ADJ*

●

IDLE CONDITION

When setting target idle speed

TARGET IGN TIM ADJ*

●

IDLE CONDITION

When adjusting target ignition tim-
ing

WORK ITEM

CONDITION

USAGE

Freeze frame data

item*

Description

DIAG TROUBLE
CODE
[PXXXX]

●

The engine control component part/control system has a trouble code, it is displayed as “PXXXX”. (Refer
to

EC-8, "INDEX FOR DTC"

FUEL SYS-B1*

●

“Fuel injection system status” at the moment a malfunction is detected is displayed.

●

One mode in the following is displayed.
“MODE 2”: Open loop due to detected system malfunction
“MODE 3”: Open loop due to driving conditions (power enrichment, deceleration enrichment)
“MODE 4”: Closed loop - using oxygen sensor(s) as feedback for fuel control
“MODE 5”: Open loop - has not yet satisfied condition to go to closed loop

FUEL SYS-B2*

CAL/LD VALUE [%]

●

The calculated load value at the moment a malfunction is detected is displayed.

COOLANT TEMP [

or [

●

The engine coolant temperature at the moment a malfunction is detected is displayed.

L-FUEL TRIM-B1 [%]

●

“Long-term fuel trim” at the moment a malfunction is detected is displayed.

●

The long-term fuel trim indicates much more gradual feedback compensation to the base fuel schedule
than short-term fuel trim.

L-FUEL TRIM-B2 [%]

S-FUEL TRIM-B1 [%]

●

“Short-term fuel trim” at the moment a malfunction is detected is displayed.

●

The short-term fuel trim indicates dynamic or instantaneous feedback compensation to the base fuel
schedule.

S-FUEL TRIM-B2 [%]

ENGINE SPEED
[rpm]

●

The engine speed at the moment a malfunction is detected is displayed.

VHCL SPEED [km/h]
or [mph]

●

The vehicle speed at the moment a malfunction is detected is displayed.

EC-130

TROUBLE DIAGNOSIS

Revision; 2004 April

2003 Murano

*1: The items are the same as those of 1st trip freeze frame data.
*2: Regarding Z50 model, “B1” indicates bank 1 and “B2” indicates bank 2.

DATA MONITOR MODE
Monitored Item

: Applicable

B/FUEL SCHDL
[msec]

●

The base fuel schedule at the moment a malfunction is detected is displayed.

INT/A TEMP SE [

or [

●

The intake air temperature at the moment a malfunction is detected is displayed.

Freeze frame data

item*

Description

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).

●

Accuracy becomes poor if engine
speed drops below the idle rpm.

●

If the signal is interrupted while the
engine is running, an abnormal
value may be indicated.

MAS A/F SE-B1 [V]

●

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

●

When the engine is stopped, a cer-
tain value is indicated.

B/FUEL SCHDL
[msec]

●

“Base fuel schedule” indicates the fuel injection
pulse width programmed into ECM, prior to any
learned on board correction.

A/F ALPHA-B1 [%]

●

The mean value of the air-fuel ratio feedback
correction factor per cycle is indicated.

●

When the engine is stopped, a cer-
tain value is indicated.

●

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

A/F ALPHA-B2 [%]

COOLAN TEMP/S
[

C] or [

●

The engine coolant temperature (determined by
the signal voltage of the engine coolant temper-
ature sensor) is displayed.

●

When the engine coolant tempera-
ture sensor is open or short-cir-
cuited, ECM enters fail-safe mode.
The engine coolant temperature
determined by the ECM is dis-
played.

HO2S1 (B1) [V]

●

The signal voltage of the heated oxygen sensor
1 is displayed.

HO2S1 (B2) [V]

HO2S2 (B1) [V]

●

The signal voltage of the heated oxygen sensor
2 is displayed.

HO2S2 (B2) [V]

HO2S1 MNTR (B1)
[RICH/LEAN]

●

Display of heated oxygen sensor 1 signal during
air-fuel ratio feedback control:
RICH ... means the mixture became “rich”, and
control is being affected toward a leaner mix-
ture.
LEAN ... means the mixture became “lean”, and
control is being affected toward a rich mixture.

●

After turning ON the ignition switch,
“RICH” is displayed until air-fuel
mixture ratio feedback control
begins.

●

When the air-fuel ratio feedback is
clamped, the value just before the
clamping is displayed continuously.

HO2S1 MNTR (B2)
[RICH/LEAN]

HO2S2 MNTR (B1)
[RICH/LEAN]

●

Display of heated oxygen sensor 2 signal:
RICH ... means the amount of oxygen after
three way catalyst is relatively small.
LEAN ... means the amount of oxygen after
three way catalyst is relatively large.

●

When the engine is stopped, a cer-
tain value is indicated.

HO2S2 MNTR (B2)
[RICH/LEAN]

VHCL SPEED SE
[km/h] or [mph]

●

The vehicle speed computed from the vehicle
speed signal sent from combination meter is dis-
played.

TROUBLE DIAGNOSIS

EC-131

Revision; 2004 April

2003 Murano

BATTERY VOLT
[V]

●

The power supply voltage of ECM is displayed.

ACCEL SEN 1 [V]

●

The accelerator pedal position sensor signal
voltage is displayed.

ACCEL SEN 2 [V]

THRTL SEN 1 [V]

●

The throttle position sensor signal voltage is dis-
played.

THRTL SEN 2 [V]

FUEL T/TEMP SE
[

C] or [

●

The fuel temperature (determined by the signal
voltage of the fuel tank temperature sensor) is
displayed.

INT/A TEMP SE
[

C] or [

●

The intake air temperature (determined by the
signal voltage of the intake air temperature sen-
sor) is indicated.

EVAP SYS PRES
[V]

●

The signal voltage of EVAP control system pres-
sure sensor is displayed.

FUEL LEVEL SE
[V]

●

The signal voltage of the fuel level sensor is dis-
played.

START SIGNAL
[ON/OFF]

●

Indicates start signal status [ON/OFF] computed
by the ECM according to the signals of engine
speed and battery voltage.

●

After starting the engine, [OFF] is
displayed regardless of the starter
signal.

CLSD THL POS
[ON/OFF]

●

Indicates idle position [ON/OFF] computed by
ECM according to the accelerator pedal position
sensor signal.

AIR COND SIG
[ON/OFF]

●

Indicates [ON/OFF] condition of the air condi-
tioner switch as determined by the air condi-
tioner signal.

P/N POSI SW
[ON/OFF]

●

Indicates [ON/OFF] condition from the park/neu-
tral position (PNP) switch signal.

PW/ST SIGNAL
[ON/OFF]

●

[ON/OFF] condition of the power steering sys-
tem (determined by the signal voltage of the
power steering pressure sensor signal) is indi-
cated.

LOAD SIGNAL
[ON/OFF]

●

Indicates [ON/OFF] condition from the electrical
load signal.
ON ... Rear window defogger switch is ON and/
or lighting switch is in 2nd position.
OFF ... Both rear window defogger switch and
lighting switch are OFF.

IGNITION SW
[ON/OFF]

●

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

BRAKE SW
[ON/OFF]

●

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

INJ PULSE-B1
[msec]

●

Indicates the actual fuel injection pulse width
compensated by ECM according to the input
signals.

●

When the engine is stopped, a cer-
tain computed value is indicated.

INJ PULSE-B2
[msec]

IGN TIMING
[BTDC]

●

Indicates the ignition timing computed by ECM
according to the input signals.

●

When the engine is stopped, a cer-
tain value is indicated.

CAL/LD VALUE [%]

●

“Calculated load value” indicates the value of
the current air flow divided by peak air flow.

Monitored item

[Unit]

ECM

INPUT

SIG-

NALS

MAIN

SIG-

NALS

Description

Remarks

EC-132

TROUBLE DIAGNOSIS

Revision; 2004 April

2003 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 volume con-
trol 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 (determined by ECM
according to the input signals) is indicated.
ON ... intake valve timing control is operating.
OFF ... Intake valve timing control is not operat-
ing.

INT/V SOL (B2) [%]

VIAS S/V
[ON/OFF]

●

The control condition of the VIAS control sole-
noid valve (determined by ECM according to the
input signals) is indicated.
ON ... VIAS control solenoid valve is operating.
OFF ... VIAS control solenoid valve is not oper-
ating.

AIR COND RLY
[ON/OFF]

●

The air conditioner relay control condition
(determined by ECM according to the input sig-
nals) 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 ... Idle condition
TRVL ... Driving condition

FUEL PUMP RLY
[ON/OFF]

●

Indicates the fuel pump relay control condition
determined by ECM according to the input sig-
nals.

VENT CONT/V
[ON/OFF]

●

The control condition of the EVAP canister 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 (deter-
mined by ECM according to the input signals) is
indicated.
HI ... High speed operation
LOW ... Low speed operation
OFF ... Stop

HO2S1 HTR (B1)
[ON/OFF]

●

Indicates [ON/OFF] condition of heated oxygen
sensor 1 heater determined by ECM according
to the input signals.

HO2S1 HTR (B2)
[ON/OFF]

Monitored item

[Unit]

ECM

INPUT

SIG-

NALS

MAIN

SIG-

NALS

Description

Remarks

TROUBLE DIAGNOSIS

EC-133

Revision; 2004 April

2003 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 signal.

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.

O2SEN HTR DTY
[%]

●

Indicates the heated oxygen sensor 1 heater
control value computed by the ECM according
to the input signals.

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 CRUISE
switch signal.

CANCEL SW
[ON/OFF]

●

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

RESUME/ACC SW
[ON/OFF]

●

Indicates [ON/OFF] condition from ACCEL/RES
switch signal.

SET SW
[ON/OFF]

●

Indicates [ON/OFF] condition from COAST/SET
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 excessively
high compared with the ASCD set speed, and
ASCD operation is cut off.

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 can-
cel signal sent from the TCM.

Monitored item

[Unit]

ECM

INPUT

SIG-

NALS

MAIN

SIG-

NALS

Description

Remarks

EC-134

TROUBLE DIAGNOSIS

Revision; 2004 April

2003 Murano

NOTE:

●

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

●

Regarding Z50 model, “B1” indicates bank 1 and “B2” indicates bank 2.

DATA MONITOR (SPEC) MODE
Monitored Item

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

ACTIVE TEST MODE
Test Item

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.

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

signals

Main

signals

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.

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.

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 injectors

●

Heated oxygen 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 Learn-
ing”.

TROUBLE DIAGNOSIS

EC-135

Revision; 2004 April

2003 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-74, "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.

POWER BAL-
ANCE

●

Engine: After warming up, idle
the engine.

●

A/C switch “OFF”

●

Shift lever “N”

●

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

Engine runs rough or dies.

●

Harness and connectors

●

Compression

●

Fuel injectors

●

Power transistor

●

Spark plugs

●

Ignition coils

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 injectors

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

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)

EC-136

TROUBLE DIAGNOSIS

Revision; 2004 April

2003 Murano

DTC Work Support Mode

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

Test mode

Test item

Condition

Reference page

EVAP SYSTEM

PURGE FLOW P0441

Refer to corresponding
trouble diagnosis for
DTC.

EC-341

EVAP SML LEAK P0442/P1442*

EC-346

EVAP V/S SML LEAK P0456/P1456*

EC-395

PURG VOL CN/V P1444

EC-517

HO2S1

HO2S1 (B1) P0133

HO2S1 (B1) P0134

HO2S1 (B1) P1143

HO2S1 (B1) P1144

HO2S1 (B2) P0153

HO2S1 (B2) P0154

HO2S1 (B2) P1163

HO2S1 (B2) P1164

H02S2

HO2S2 (B1) P0139

HO2S2 (B1) P1146

HO2S2 (B1) P1147

HO2S2 (B2) P0159

HO2S2 (B2) P1166

HO2S2 (B2) P1167

TROUBLE DIAGNOSIS

EC-137

Revision; 2004 April

2003 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.

“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.

“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

EC-138

TROUBLE DIAGNOSIS

Revision; 2004 April

2003 Murano

Operation

“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-26, "How to Perform

Efficient Diagnosis for an Electrical Incident"

“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

ABS004B2

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 man-
ual.

PBIB0197E

SEF139P

TROUBLE DIAGNOSIS

EC-139

Revision; 2004 April

2003 Murano

FUNCTION

INSPECTION PROCEDURE

Turn ignition switch OFF.

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

Diagnostic test mode

Function

MODE 1

READINESS TESTS

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

MODE 2

(FREEZE DATA)

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

EC-74, "FREEZE FRAME DATA AND 1ST TRIP

FREEZE FRAME DATA"

MODE 3

DTCs

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

MODE 4

CLEAR DIAG INFO

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

●

Clear number of diagnostic trouble codes (MODE 1)

●

Clear diagnostic trouble codes (MODE 3)

●

Clear trouble code for freeze frame data (MODE 1)

●

Clear freeze frame data (MODE 2)

●

Reset status of system monitoring test (MODE 1)

●

Clear on board monitoring test results (MODE 6 and 7)

MODE 6

(ON BOARD TESTS)

This mode accesses the results of on board diagnostic monitoring tests of specific com-
ponents/systems that are not continuously monitored.

MODE 7

(ON BOARD TESTS)

This mode enables the off board test drive to obtain test results for emission-related pow-
ertrain components/systems that are continuously monitored during normal driving condi-
tions.

MODE 8

—

This mode can close EVAP system in ignition switch “ON” position (Engine stopped).
When this mode is performed, the following parts can be opened or closed.

●

EVAP canister vent control valve open

In the following conditions, this mode cannot function.

●

Low ambient temperature

●

Low battery voltage

●

Engine running

●

Ignition switch “OFF”

●

Low fuel temperature

●

Too much pressure is applied to EVAP system

MODE 9

(CALIBRATION ID)

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

PBIB1300E

TROUBLE DIAGNOSIS

EC-141

Revision; 2004 April

2003 Murano

CONSULT-II Reference Value in Data Monitor

ABS004B3

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

●

Engine: After warming up

●

Air conditioner switch: OFF

●

Shift lever: N

●

No-load

Idle

Approx. 1.1 - 1.5V

2,500 rpm

Approx. 1.7 - 2.4V

B/FUEL SCHDL

●

Engine: After warming up

●

Shift lever: N

●

Air conditioner switch: OFF

●

No-load

Idle

2.5 - 3.5 msec

2,000 rpm

2.5 - 4.0 msec

A/F ALPHA-B1
A/F ALPHA-B2

●

Engine: After warming up

Maintaining engine speed at 2,000
rpm

54% - 155%

COOLAN TEMP/S

●

Engine: After warming up

More than 70

C (158

HO2S1 (B1)
HO2S1 (B2)

●

Engine: After warming up

Maintaining engine speed at 2,000
rpm

0 - 0.3V

←→

Approx. 0.6 -

1.0V

HO2S2 (B1)
HO2S2 (B2)

●

Warm-up condition

●

After keeping engine speed
between 3,500 and 4,000 rpm for
one minute and at idle for one
minute under no load.

Revving engine from idle to 3,000 rpm
quickly.

0 - 0.3V

←→

Approx. 0.6 -

1.0V

HO2S1 MNTR (B1)
HO2S1 MNTR (B2)

●

Engine: After warming up

Maintaining engine speed at 2,000
rpm

LEAN

←→

RICH

Changes more than 5 times
during 10 seconds.

HO2S2 MNTR (B1)
HO2S2 MNTR (B2)

●

Warm-up condition

●

After keeping engine speed
between 3,500 and 4,000 rpm for
one minute and at idle for one
minute under no load.

Revving engine from idle to 3,000 rpm
quickly.

LEAN

←→

RICH

VEH 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 SEN1
ACCEL SEN2*

●

Ignition switch: ON
(Engine stopped)

Accelerator pedal: Fully released

0.5 - 1.0V

Accelerator pedal: Fully depressed

4.2 - 4.8V

THRTL SEN1
THRTL SEN2*

●

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

→

OFF

→

OFF

CLSD THL POS

●

Ignition switch: ON
(Engine stopped)

Accelerator pedal: Fully released

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.)

EC-142

TROUBLE DIAGNOSIS

Revision; 2004 April

2003 Murano

P/N POSI SW

●

Ignition switch: ON

Shift lever: P or N

Shift lever: Except above

OFF

PW/ST SIGNAL

●

Engine: After warming up, idle
the engine

Steering wheel is in neutral position.
(Forward direction)

OFF

Steering wheel is turned.

LOAD SIGNAL

●

Ignition switch: ON

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

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

OFF

IGNITION SW

●

Ignition switch: ON

→

OFF

→

OFF

→

BRAKE SW

●

Ignition switch: ON

Brake pedal: Fully released

OFF

Brake pedal: Slightly depressed

INJ PULSE-B1
INJ PULSE-B2

●

Engine: After warming up

●

Shift lever: 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: N

●

Air conditioner switch: OFF

●

No-load

Idle

- 18

BTDC

2,000 rpm

- 45

BTDC

CAL/LD VALUE

●

Engine: After warming up

●

Shift lever: N

●

Air conditioner switch: OFF

●

No-load

Idle

5% - 35%

2,500 rpm

5% - 35%

MASS AIRFLOW

●

Engine: After warming up

●

Shift lever: 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: N

●

Air conditioner switch: OFF

●

No-load

Idle

2,000 rpm

—

INT/V TIM (B1)
INT/V TIM (B2)

●

Engine: After warming up

●

Shift lever: N

●

Air conditioner switch: OFF

●

No-load

Idle

−

- 5

2,000 rpm

Approx. 0

- 30

INT/V SOL (B1)
INT/V SOL (B2)

●

Engine: After warming up

●

Shift lever: 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

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)

ENGINE MOUNT

●

Engine: After warming up

Idle (with vehicle stopped)

IDLE

Except above conditions

TRVL

MONITOR ITEM

CONDITION

SPECIFICATION

Nissan Murano Z50 (2003 year). Manual - part 88