Nissan Murano Z50 (2004 year). Manual — part 75
TROUBLE DIAGNOSIS
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THRTL SEN 1 [V]
×
×
●
The throttle position sensor signal volt-
age is displayed.
●
THRTL SEN2 signal is converteds by
ECM internally. Thus, it differs from ECM
terminal voltage signal.
THRTL SEN 2 [V]
×
FUEL T/TEMP SE [
°
C]
or [
°
F]
×
●
The fuel temperature (determined by
the signal voltage of the fuel tank tem-
perature sensor) is displayed.
INT/A TEMP SE [
°
C]
or [
°
F]
×
×
●
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
EC-112
TROUBLE DIAGNOSIS
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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
operating.
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 ... Idle condition
TRVL ... Driving condition
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
TROUBLE DIAGNOSIS
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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
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.
Monitored item [Unit]
ECM
INPUT
SIG-
NALS
MAIN
SIG-
NALS
Description
Remarks
EC-114
TROUBLE DIAGNOSIS
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NOTE:
●
Any monitored item that does not match the vehicle being diagnosed is deleted from the display automatically.
DATA MONITOR (SPEC) MODE
Monitored Item
NOTE:
Any monitored item that does not match the vehicle being diagnosed is deleted from the display automatically.
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.
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.
TROUBLE DIAGNOSIS
EC-115
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ACTIVE TEST MODE
Test Item
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
●
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 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 lis-
ten 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.
EC-116
TROUBLE DIAGNOSIS
Revision: 2004 November
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*: Leaving cooling fan OFF with CONSULT-II while engine is running may cause the engine to overheat.
DTC & SRT CONFIRMATION MODE
SRT STATUS Mode
EC-53, "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.
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
Condition
Reference page
EVAPORATIVE
SYSTEM
PURGE FLOW P0441
Refer to corresponding
trouble diagnosis for
DTC.
EVAP SML LEAK P0442/P1442*
EVAP V/S SML LEAK P0456/P1456*
PURG VOL CN/V P1444
A/F SEN1
A/F SEN1 (B1) P1276
A/F SEN1 (B1) P1286
A/F SEN1 (B1) P1278/1279
A/F SEN1 (B1) P1288/1289
HO2S2
HO2S2 (B1) P0139
HO2S2 (B1) P1146
HO2S2 (B1) P1147
HO2S2 (B2) P0159
HO2S2 (B2) P1166
HO2S2 (B2) P1167
TROUBLE DIAGNOSIS
EC-117
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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
EC-118
TROUBLE DIAGNOSIS
Revision: 2004 November
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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
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
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 manual.
PBIB0197E
SEF139P
TROUBLE DIAGNOSIS
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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
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-53, "FREEZE FRAME DATA AND 1ST TRIP
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 EVAP canister vent control valve can be closed.
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
EC-120
TROUBLE DIAGNOSIS
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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
TROUBLE DIAGNOSIS
EC-121
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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
●
See
EC-126, "TROUBLE DIAGNOSIS - SPECIFICATION VALUE"
.
B/FUEL SCHDL
●
See
EC-126, "TROUBLE DIAGNOSIS - SPECIFICATION VALUE"
.
A/F ALPHA-B1
A/F ALPHA-B2
●
See
EC-126, "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)
●
Warm-up condition
●
After keeping engine speed
between 3,500 and 4,000 rpm for
1 minute and at idle for 1 minute
under no load
Revving engine from idle to 3,000 rpm
quickly
0 - 0.3V
←→
Approx. 0.6 -
1.0V
HO2S2 MNTR (B1)
HO2S2 MNTR (B2)
●
Warm-up condition
●
After keeping engine speed
between 3,500 and 4,000 rpm for
1 minute and at idle for 1 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
→
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 is in neutral position.
(Forward direction)
OFF
Steering wheel is 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
EC-122
TROUBLE DIAGNOSIS
Revision: 2004 November
2004 Murano
BRAKE SW
●
Ignition switch: ON
Brake pedal: Fully released
OFF
Brake pedal: Slightly depressed
ON
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
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
Engine speed is below 950 rpm
IDLE
Engine speed is 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
MONITOR ITEM
CONDITION
SPECIFICATION
TROUBLE DIAGNOSIS
EC-123
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EC
Revision: 2004 November
2004 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.
COOLING FAN
●
Engine: After warming up, idle
the engine
●
Air conditioner switch: OFF
Engine coolant temperature is 94
°
C
(201
°
F) or less
OFF
Engine coolant temperature is
between 95
°
C (203
°
F) and 99
°
C
(210
°
F)
LOW
Engine coolant temperature is 100
°
C
(212
°
F) or more
HI
HO2S2 HTR (B1)
HO2S2 HTR (B2)
●
Engine speed is 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
VEH 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
ON/OFF (MAIN) switch: Pressed
ON
ON/OFF (MAIN) switch: Released
OFF
CANCEL SW
●
Ignition switch: ON
CANCEL switch: Pressed
ON
CANCEL switch: Released
OFF
RESUME/ACC SW
●
Ignition switch: ON
ACCEL/RESUME switch: Pressed
ON
ACCEL/RESUME switch: Released
OFF
SET SW
●
Ignition switch: ON
COAST/SET switch: Pressed
ON
COAST/SET 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
ON/OFF (MAIN) switch: Pressed at
the 1st time
→
at the 2nd time
ON
→
OFF
SET LAMP
●
ON/OFF (MAIN) switch: ON
●
When vehicle speed is between
40 km/h (25 MPH) and 144 km/h
(89 MPH)
COAST/SET switch pressed
ON
COAST/SET switch released
OFF
MONITOR ITEM
CONDITION
SPECIFICATION
EC-124
TROUBLE DIAGNOSIS
Revision: 2004 November
2004 Murano
Major Sensor Reference Graph in Data Monitor Mode
ABS004B4
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 selector 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
SEF241Y
TROUBLE DIAGNOSIS
EC-125
C
D
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EC
Revision: 2004 November
2004 Murano
PBIB1594E
EC-126
TROUBLE DIAGNOSIS - SPECIFICATION VALUE
Revision: 2004 November
2004 Murano
TROUBLE DIAGNOSIS - SPECIFICATION VALUE
PFP:00031
Description
ABS004B5
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
ABS004B6
●
Vehicle driven distance: More than 5,000 km (3,017 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*
1
●
Electrical load: Not applied*
2
●
Engine speed: Idle
*1: 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).
*2: Rear window defogger switch, air conditioner switch, lighting switch are OFF. Steering wheel is straight
ahead.
Inspection Procedure
ABS004B7
NOTE:
Perform “DATA MONITOR (SPEC)” mode in maximum scale display.
1.
Perform
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-127, "Diagnostic Procedure"
SEF601Z
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