Nissan Murano Z50 (2007 year). Manual

EC-102

TROUBLE DIAGNOSIS

Revision: 2006 July

2007 Murano

ECM Harness Connector Terminal Layout

NBS002ZL

ECM Terminals and Reference Value

NBS002ZM

PREPARATION

ECM is located behind the glove box. For this inspection, remove
glove box.

ECM INSPECTION TABLE

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 ECMs transistor. Use a ground other than ECM terminals, such as the ground.

MBIB0045E

PBIB1299E

TER-

MINAL

NO.

WIRE

COLOR

ITEM

CONDITION

DATA (DC Voltage)

ECM ground

[Engine is running]

●

Idle speed

Body ground

G/B

A/F sensor 1 heater
(Bank 1)

[Engine is running]

●

Warm-up condition

●

Idle speed

Approximately 5V

Throttle control motor relay
power supply

[Ignition switch: ON]

BATTERY VOLTAGE
(11 - 14V)

Throttle control motor (Close)

[Ignition switch: ON]

●

Engine stopped

●

Shift lever: D

●

Accelerator pedal: Fully released

0 - 14V

PBIB1584E

PBIB1104E

TROUBLE DIAGNOSIS

EC-103

Revision: 2006 July

2007 Murano

Throttle control motor (Open)

[Ignition switch: ON]

●

Engine stopped

●

Shift lever: D

●

Accelerator pedal: Fully depressed

0 - 14V

L/R

Heated oxygen sensor 2
heater (Bank 2)

[Engine is running]

●

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.

0 - 1.0V

[Ignition switch: ON]

●

Engine stopped

[Engine is running]

●

Engine speed: Above 3,600 rpm

BATTERY VOLTAGE
(11 - 14V)

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]

●

More than 2 seconds after engine speed is
950 rpm or less

2.0 - 3.0V

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]

●

More than 2 seconds after engine speed is
950 rpm or more

2.0 - 3.0V

Intake valve timing control
solenoid valve (Bank 2)

[Engine is running]

●

Warm-up condition

●

Idle speed

BATTERY VOLTAGE
(11 - 14V)

[Engine is running]

●

Warm-up condition

●

Engine speed: 2,000 rpm

7 - 12V

TER-

MINAL

NO.

WIRE

COLOR

ITEM

CONDITION

DATA (DC Voltage)

PBIB1105E

PBIB1790E

EC-104

TROUBLE DIAGNOSIS

Revision: 2006 July

2007 Murano

Intake valve timing control
solenoid valve (Bank 1)

[Engine is running]

●

Warm-up condition

●

Idle speed

BATTERY VOLTAGE
(11 - 14V)

[Engine is running]

●

Warm-up condition

●

Engine speed: 2,000 rpm

7 - 12V

Power steering pressure sen-
sor

[Engine is running]

●

Steering wheel: Being turned

0.5 - 4.5V

[Engine is running]

●

Steering wheel: Not being turned

0.4 - 0.8V

Crankshaft position sensor
(POS)

[Engine is running]

●

Warm-up condition

●

Idle speed

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

Approximately 1.6V

[Engine is running]

●

Engine speed: 2,000 rpm

Approximately 1.4V

Camshaft position sensor
(PHASE) (Bank 2)

[Engine is running]

●

Warm-up condition

●

Idle speed

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

1.0 - 4.0V

[Engine is running]

●

Engine speed: 2,000 rpm

1.0 - 4.0V

Knock sensor

[Engine is running]

●

Idle speed

Approximately 2.5V

TER-

MINAL

NO.

WIRE

COLOR

ITEM

CONDITION

DATA (DC Voltage)

PBIB1790E

PBIB1041E

PBIB1042E

PBIB1039E

PBIB1040E

TROUBLE DIAGNOSIS

EC-105

Revision: 2006 July

2007 Murano

LG/B

A/F sensor 1 (Bank 1)

[Engine is running]

●

Warm-up condition

●

Idle speed

Approximately 3.1V

O/L

Approximately 2.6V

BR/Y

Approximately 2.3V

Y/R

Approximately 2.3V

21
22
23

L/W
R/Y
R/B

Fuel injector No. 5
Fuel injector No. 3
Fuel injector No. 1

[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)

A/F sensor 1 heater
(Bank 2)

[Engine is running]

●

Warm-up condition

●

Idle speed

Approximately 5V

P/L

Heated oxygen sensor 2
heater (Bank 1)

[Engine is running]

●

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.

0 - 1.0V

[Ignition switch: ON]

●

Engine stopped

[Engine is running]

●

Engine speed: Above 3,600 rpm

BATTERY VOLTAGE
(11 - 14V)

G/Y

VIAS control solenoid valve

[Engine is running]

●

Idle speed

BATTERY VOLTAGE
(11 - 14V)

[Engine is running]

●

Engine speed: Between 1,800 and 3,600
rpm

0 - 1.0V

EVAP control system pres-
sure sensor

[Ignition switch: ON]

Approximately 1.8 - 4.8V

TER-

MINAL

NO.

WIRE

COLOR

ITEM

CONDITION

DATA (DC Voltage)

SEC984C

SEC985C

PBIB1584E

EC-106

TROUBLE DIAGNOSIS

Revision: 2006 July

2007 Murano

Camshaft position sensor
(PHASE) (Bank 1)

[Engine is running]

●

Warm-up condition

●

Idle speed

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

1.0 - 4.0V

[Engine is running]

●

Engine speed: 2,000 rpm

1.0 - 4.0V

Y/G

Intake air temperature sensor

[Engine is running]

Approximately 0 - 4.8V
Output voltage varies with intake
air temperature.

40
41
42

R/G
L/Y
W/L

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)

GR/L

EVAP canister purge volume
control solenoid valve

[Engine is running]

●

Idle speed

●

Accelerator pedal is not depressed even
slightly, after engine starting.

BATTERY VOLTAGE

(11 - 14V)

[Engine is running]

●

Engine speed is about 2,000 rpm (More
than 100 seconds after starting engine).

BATTERY VOLTAGE

(11 - 14V)

TER-

MINAL

NO.

WIRE

COLOR

ITEM

CONDITION

DATA (DC Voltage)

PBIB1039E

PBIB1040E

SEC984C

SEC985C

SEC990C

SEC991C

TROUBLE DIAGNOSIS

EC-107

Revision: 2006 July

2007 Murano

Sensor power supply (Throt-
tle position sensor)

[Ignition switch: ON]

Approximately 5V

G/O

Sensor power supply
(EVAP control system pres-
sure sensor)

[Ignition switch: ON]

Approximately 5V

R/W

Sensor power supply
(Refrigerant pressure sensor)

[Ignition switch: ON]

Approximately 5V

Throttle position sensor 1

[Ignition switch: ON]

●

Engine stopped

●

Shift lever: D

●

Accelerator pedal: Fully released

More than 0.36V

[Ignition switch: ON]

●

Engine stopped

●

Shift lever: D

●

Accelerator pedal: Fully depressed

Less than 4.75V

G/W

Mass air flow sensor

[Engine is running]

●

Warm-up condition

●

Idle speed

0.9 - 1.2V

[Engine is running]

●

Warm-up condition

●

Engine speed: 2,500 rpm

1.6 - 2.0V

Heated oxygen sensor 2
(Bank 2)

[Engine is running]

●

Revving engine from idle to 3,000 rpm
quickly 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

0 - Approximately 1.0V

A/F sensor 1 (Bank 2)

[Engine is running]

●

Warm-up condition

●

Idle speed

Approximately 2.6V

Approximately 2.3V

G/Y

Approximately 3.1V

Approximately 2.3V

60
61
62

BR/R
L/R
Y/R

Ignition signal No. 5
Ignition signal No. 3
Ignition signal No. 1

[Engine is running]

●

Warm-up condition

●

Idle speed

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

0 - 0.3V

[Engine is running]

●

Warm-up condition

●

Engine speed: 2,500 rpm

0.1 - 0.6V

TER-

MINAL

NO.

WIRE

COLOR

ITEM

CONDITION

DATA (DC Voltage)

SEC986C

SEC987C

EC-108

TROUBLE DIAGNOSIS

Revision: 2006 July

2007 Murano

Sensor ground
(Throttle position sensor)

[Engine is running]

●

Warm-up condition

●

Idle speed

Approximately 0V

Sensor ground

[Engine is running]

●

Warm-up condition

●

Idle speed

Approximately 0V

W/G

Sensor power supply
(PSP sensor)

[Ignition switch: ON]

Approximately 5V

Throttle position sensor 2

[Ignition switch: ON]

●

Engine stopped

●

Shift lever: D

●

Accelerator pedal: Fully released

Less than 4.75V

[Ignition switch: ON]

●

Engine stopped

●

Shift lever: D

●

Accelerator pedal: Fully depressed

More than 0.36V

Refrigerant pressure sensor

[Engine is running]

●

Warm-up condition

●

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

1.0 - 4.0V

Y/B

Engine coolant temperature
sensor

[Engine is running]

Approximately 0 - 4.8V
Output voltage varies with
engine coolant temperature.

Heated oxygen sensor 2
(Bank 1)

[Engine is running]

●

Revving engine from idle to 3,000 rpm
quickly 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

0 - Approximately 1.0V

Sensor ground
(Heated oxygen sensor 2)

[Engine is running]

●

Warm-up condition

●

Idle speed

Approximately 0V

79
80
81

GR/R
GR
G/R

Ignition signal No. 6
Ignition signal No. 4
Ignition signal No. 2

[Engine is running]

●

Warm-up condition

●

Idle speed

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

0 - 0.3V

[Engine is running]

●

Warm-up condition

●

Engine speed: 2,500 rpm

0.1 - 0.6V

TER-

MINAL

NO.

WIRE

COLOR

ITEM

CONDITION

DATA (DC Voltage)

SEC986C

SEC987C

TROUBLE DIAGNOSIS

EC-109

Revision: 2006 July

2007 Murano

Sensor ground
(APP sensor 1)

[Engine is running]

●

Warm-up condition

●

Idle speed

Approximately 0V

Sensor ground
(APP sensor 2)

[Engine is running]

●

Warm-up condition

●

Idle speed

Approximately 0V

Data link connector

[Ignition switch: ON]

●

CONSULT-II or GST: Disconnected

Approximately 5V - Battery volt-
age (11 - 14V)

CAN communication line

[Ignition switch: ON]

Approximately 1.1 - 2.3V
Output voltage varies with the
communication status

R/W

Sensor power supply
(APP sensor 1)

[Ignition switch: ON]

Approximately 5V

Sensor power supply
(APP sensor 2)

[Ignition switch: ON]

Approximately 5V

CAN communication line

[Ignition switch: ON]

Approximately 2.6 - 3.2V
Output voltage varies with the
communication status.

W/R

Accelerator pedal position
sensor 2

[Ignition switch: ON]

●

Engine stopped

●

Accelerator pedal: Fully released

0.25 - 0.5V

[Ignition switch: ON]

●

Engine stopped

●

Accelerator pedal: Fully depressed

2.0 - 2.5V

G/Y

ASCD steering switch

[Ignition switch: ON]

●

ASCD steering switch: OFF

Approximately 4V

[Ignition switch: ON]

●

MAIN switch: Pressed

Approximately 0V

[Ignition switch: ON]

●

CANCEL switch: Pressed

Approximately 1V

[Ignition switch: ON]

●

RESUME/ACCELERATE switch: Pressed

Approximately 3V

[Ignition switch: ON]

●

SET/COAST switch: Pressed

Approximately 2V

101

R/G

Stop lamp switch

[Ignition switch: OFF]

●

Brake pedal: Fully released

Approximately 0V

[Ignition switch: OFF]

●

Brake pedal: Slightly depressed

BATTERY VOLTAGE
(11 - 14V)

102

G/W

PNP switch

[Ignition switch: ON]

●

Shift lever: P or N

Approximately 0V

[Ignition switch: ON]

●

Except above

BATTERY VOLTAGE
(11 - 14V)

104

P/L

Throttle control motor relay

[Ignition switch: OFF]

BATTERY VOLTAGE
(11 - 14V)

[Ignition switch: ON]

0 - 1.0V

TER-

MINAL

NO.

WIRE

COLOR

ITEM

CONDITION

DATA (DC Voltage)

EC-110

TROUBLE DIAGNOSIS

Revision: 2006 July

2007 Murano

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

106

Accelerator pedal position
sensor 1

[Ignition switch: ON]

●

Engine stopped

●

Accelerator pedal: Fully released

0.5 - 1.0V

[Ignition switch: ON]

●

Engine stopped

●

Accelerator pedal: Fully depressed

4.2 - 4.8V

107

R/Y

Fuel tank temperature sensor

[Engine is running]

Approximately 0 - 4.8V
Output voltage varies with fuel
tank temperature.

108

L/B

ASCD brake switch

[Ignition switch: ON]

●

Brake pedal: Slightly depressed

Approximately 0V

[Ignition switch: ON]

●

Brake pedal: Fully released

BATTERY VOLTAGE
(11 - 14V)

109

Ignition switch

[Ignition switch: OFF]

[Ignition switch: ON]

BATTERY VOLTAGE
(11 - 14V)

111

W/B

ECM relay
(Self shut-off)

[Engine is running]
[Ignition switch: OFF]

●

For a few seconds after turning ignition
switch OFF

0 - 1.5V

[Ignition switch: OFF]

●

More than a few seconds after turning igni-
tion switch OFF

BATTERY VOLTAGE
(11 - 14V)

113

B/P

Fuel pump relay

[Ignition switch: ON]

●

For 1 second after turning ignition switch
ON.

[Engine is running]

0 - 1.5V

[Ignition switch: ON]

●

More than 1 second after turning ignition
switch ON.

BATTERY VOLTAGE
(11 - 14V)

115
116

B
B

ECM ground

[Engine is running]

●

Idle speed

Body ground

117

EVAP canister vent control
valve

[Ignition switch: ON]

BATTERY VOLTAGE
(11 - 14V)

119

120

R/B
R/B

Power supply for ECM

[Ignition switch: ON]

BATTERY VOLTAGE
(11 - 14V)

121

Power supply for ECM
(Back-up)

[Ignition switch: OFF]

BATTERY VOLTAGE
(11 - 14V)

TER-

MINAL

NO.

WIRE

COLOR

ITEM

CONDITION

DATA (DC Voltage)

TROUBLE DIAGNOSIS

EC-111

Revision: 2006 July

2007 Murano

CONSULT-II Function (ENGINE)

NBS002ZN

FUNCTION

*: The following emission-related diagnostic information is cleared when the ECM memory is erased.

●

Diagnostic trouble codes

●

1st trip diagnostic trouble codes

●

Freeze frame data

●

1st trip freeze frame data

●

System readiness test (SRT) codes

●

Test values

Diagnostic test mode

Function

Work support

This mode enables a technician to adjust some devices faster and more accurately by following the
indications on the CONSULT-II unit.

Self-diagnostic results

Self-diagnostic results such as 1st trip DTC, DTCs and 1st trip freeze frame data or freeze frame data
can be read and erased quickly.*

Data monitor

Input/Output data in the ECM can be read.

Data monitor (SPEC)

Input/Output of the specification for Basic fuel schedule, AFM, A/F feedback control value and the
other data monitor items can be read.

CAN diagnostic support
monitor

The results of transmit/receive diagnosis of CAN communication can be read.

Active test

Diagnostic Test Mode in which CONSULT-II drives some actuators apart from the ECMs and also
shifts some parameters in a specified range.

Function test

This mode is used to inform customers when their vehicle condition requires periodic maintenance.

DTC & SRT confirmation

The status of system monitoring tests and the self-diagnosis status/result can be confirmed.

ECM part number

ECM part number can be read.

EC-112

TROUBLE DIAGNOSIS

Revision: 2006 July

2007 Murano

ENGINE CONTROL COMPONENT PARTS/CONTROL SYSTEMS APPLICATION

Item

DIAGNOSTIC TEST MODE

WORK

SUP-

PORT

SELF-DIAGNOSTIC

RESULTS

DATA

MONI-

TOR

DATA

MONI-

TOR

(SPEC)

ACTIVE

TEST

DTC & SRT

CONFIRMATION

DTC*

FREEZE
FRAME

DATA*

SRT

STATUS

DTC

WORK

SUP-

PORT

ENGI

NE CONTROL

COMPONENT P

ARTS

INPUT

Crankshaft position sensor (POS)

Camshaft position sensor (PHASE)

Mass air flow sensor

Engine coolant temperature sensor

Air fuel ratio (A/F) sensor 1

Heated oxygen sensor 2

Wheel sensor

Accelerator pedal position sensor

Throttle position sensor

Fuel tank temperature sensor

EVAP control system pressure
sensor

Intake air temperature sensor

Knock sensor

Refrigerant pressure sensor

Closed throttle position switch
(accelerator pedal position sensor
signal)

Air conditioner switch

Park/neutral position (PNP) switch

Stop lamp switch

Power steering pressure sensor

Battery voltage

Load signal

Primary speed sensor

Fuel level sensor

ASCD steering switch

ASCD brake switch

TROUBLE DIAGNOSIS

EC-113

Revision: 2006 July

2007 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-51

*3: Always “CMPLT” is displayed.

INSPECTION PROCEDURE

Refer to

GI-37, "CONSULT-II Start Procedure"

WORK SUPPORT MODE
Work Item

ENGINE

COMPONENT P

ARTS

OUTPUT

Fuel injector

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

Air fuel ratio (A/F) 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*

FREEZE
FRAME

DATA*

SRT

STATUS

DTC

WORK

SUP-

PORT

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

EC-114

TROUBLE DIAGNOSIS

Revision: 2006 July

2007 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

VIN REGISTRATION

●

IN THIS MODE VIN IS REGISTERED IN ECM.

When registering VIN in ECM

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.
Mode2: Open loop due to detected system malfunction
Mode3: Open loop due to driving conditions (power enrichment, deceleration enleanment)
Mode4: Closed loop - using oxygen sensor(s) as feedback for fuel control
Mode5: 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 TRM-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 TRM-B2 [%]

S-FUEL TRM-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 TRM-B2 [%]

ENGINE SPEED
[rpm]

●

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

VEHICL SPEED [km/
h] or [mph]

●

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

TROUBLE DIAGNOSIS

EC-115

Revision: 2006 July

2007 Murano

*: The items are the same as those of 1st trip freeze frame data.

DATA MONITOR MODE
Monitored Item

: Applicable

ABSOL TH-P/S [%]

●

The throttle valve opening angle at the moment a malfunction is detected is displayed.

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 posi-
tion sensor (POS) and camshaft posi-
tion 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 certain
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 cor-
rection.

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 certain
value is indicated.

●

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

A/F ALPHA-B2 [%]

COOLAN TEMP/S [

or [

●

The engine coolant temperature (deter-
mined by the signal voltage of the
engine coolant temperature sensor) is
displayed.

●

When the engine coolant temperature
sensor is open or short-circuited, ECM
enters fail-safe mode. The engine cool-
ant temperature determined by the ECM
is displayed.

A/F SEN1 (B1) [V]

●

The A/F signal computed from the input
signal of the A/F sensor 1 is displayed.

A/F SEN1 (B2) [V]

HO2S2 (B1) [V]

●

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

HO2S2 (B2) [V]

HO2S2 MNTR (B1)
[RICH/LEAN]

●

Display of heated oxygen sensor 2 sig-
nal:
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 certain
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 combi-
nation meter is displayed.

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 signal is converteds by
ECM internally. Thus, it differ from ECM
terminal voltage signal.

ACCEL SEN 2 [V]

EC-116

TROUBLE DIAGNOSIS

Revision: 2006 July

2007 Murano

THRTL SEN 1 [V]

●

The throttle position sensor signal volt-
age is displayed.

●

THRTL SEN 2 signal is converteds by
ECM internally. Thus, it differ from ECM
terminal voltage signal.

THRTL SEN 2 [V]

FUEL T/TMP SE [

or [

●

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

INT/A TEMP SE [

or [

●

The intake air temperature (determined
by the signal voltage of the intake air
temperature sensor) is indicated.

EVAP SYS PRES [V]

●

The signal voltage of EVAP control sys-
tem pressure sensor is displayed.

FUEL LEVEL SE [V]

●

The signal voltage of the fuel level sen-
sor is displayed.

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 dis-
played regardless of the starter signal.

CLSD THL POS [ON/
OFF]

●

Indicates idle position [ON/OFF] com-
puted by ECM according to the acceler-
ator pedal position sensor signal.

AIR COND SIG [ON/
OFF]

●

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

P/N POSI SW
[ON/OFF]

●

Indicates [ON/OFF] condition from the
park/neutral position (PNP) switch sig-
nal.

PW/ST SIGNAL [ON/
OFF]

●

[ON/OFF] condition of the power steer-
ing system (determined by the signal
voltage of the power steering pressure
sensor signal) is indicated.

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 posi-
tion.
OFF: Both rear window defogger switch
and lighting switch are OFF.

IGNITION SW
[ON/OFF]

●

Indicates [ON/OFF] condition from igni-
tion switch signal.

HEATER FAN SW
[ON/OFF]

●

Indicates [ON/OFF] condition from
heater fan 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 certain
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 certain
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

Nissan Murano Z50 (2007 year). Manual - part 72