Nissan Cube. Manual - part 307

EC-114

< SYSTEM DESCRIPTION >

[MR18DE]

DIAGNOSIS SYSTEM (ECM)

Monitored item

Unit

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 dis-

played.

• When the engine is stopped, a 

certain value is indicated.

• When engine is running specifica-

tion range is indicated in “SPEC”.

B/FUEL SCHDL

ms

• “Base fuel schedule” indicates the fuel injection pulse 

width programmed into ECM, prior to any learned on 
board correction.

• When engine is running specifica-

tion range is indicated in “SPEC”.

A/F ALPHA-B1

%

• The mean value of the air-fuel ratio feedback correc-

tion 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.

• When engine is running specifica-

tion range is indicated in “SPEC”.

COOLANT TEMP/S

°

C or 

°

F

• The engine coolant temperature (determined by the 

signal voltage of the engine coolant temperature sen-
sor) 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.

A/F SEN1 (B1)

V

• The A/F signal computed from the input signal of the 

air fuel ratio (A/F) sensor 1 is displayed.

HO2S2 (B1)

V

• The signal voltage of the heated oxygen sensor 2 is 

displayed.

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 

certain value is indicated.

VHCL SPEED SE

km/h or mph

• The vehicle speed computed from the vehicle speed 

signal sent from combination 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 converted 

by ECM internally. Thus, it differs 
from ECM terminal voltage signal.

ACCEL SEN 2

TP SEN 1-B1

V

• The throttle position sensor signal voltage is dis-

played.

• TP SEN 2-B1 signal is converted 

by ECM internally. Thus, it differs 
from ECM terminal voltage signal.

TP SEN 2-B1

FUEL T/TMP SE

°

C or 

°

F

• The fuel temperature (determined by the signal volt-

age of the fuel tank temperature 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 indicat-
ed.

EVAP SYS PRES

V

• The signal voltage of EVAP control system pressure 

sensor is displayed.

FUEL LEVEL SE

V

• The signal voltage of the fuel level sensor 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 

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 sig-
nal.

DIAGNOSIS SYSTEM (ECM)

EC-115

< SYSTEM DESCRIPTION >

[MR18DE]

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AIR COND SIG

ON/OFF

• Indicates [ON/OFF] condition of the air conditioner 

switch determined by the air conditioner ON signal.

P/N POSI SW

ON/OFF

• Indicates [ON/OFF] condition from the park/neutral 

position (PNP) switch signal (M/T models) or Trans-
mission range switch signal (CVT models).

PW/ST SIGNAL

ON/OFF

• [ON/OFF] condition of the power steering system (de-

termined by the signal sent from EPS control unit) is 
indicated.

LOAD SIGNAL

ON/OFF

• Indicates [ON/OFF] condition from the electrical load 

signal.
ON: Rear window defogger switch is ON and/or light-
ing 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 sig-

nal.

HEATER FAN SW

ON/OFF

• Indicates [ON/OFF] condition from the 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 compen-

sated by ECM according to the input signals.

• When the engine is stopped, a 

certain computed value is indicat-
ed.

IGN TIMING

BTDC

• Indicates the ignition timing computed by ECM ac-

cording 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 cur-

rent air flow divided by peak air flow.

MASS AIRFLOW

g/s

• Indicates the mass air flow computed by ECM accord-

ing to the signal voltage of the mass air flow sensor.

PURG VOL C/V

%

• Indicates the EVAP canister purge volume control so-

lenoid valve control value computed by the ECM ac-
cording to the input signals.

• The opening becomes larger as the value increases.

INT/V TIM(B1)

°

CA

• Indicates [

°

CA] of intake camshaft advance angle. 

INT/V SOL(B1)

%

• The control value of the intake valve timing control so-

lenoid valve (determined by ECM according to the in-
put signals) is indicated.

• The advance angle becomes larger as the value in-

creases.

AIR COND RLY

ON/OFF

• The air conditioner relay control condition (determined 

by ECM according to the input signals) is indicated.

FUEL PUMP RLY

ON/OFF

• Indicates the fuel pump relay control condition deter-

mined by ECM according to the input signals.

VENT CONT/V

ON/OFF

• The control condition of the EVAP canister vent control 

valve (determined by ECM according to the input sig-
nals) is indicated.
ON: Closed
OFF: Open

THRTL RELAY

ON/OFF

• Indicates the throttle control motor relay control condi-

tion determined by the ECM according to the input sig-
nals.

COOLING FAN

HI/LOW/

OFF

• Indicates the condition of the cooling fan (determined 

by ECM according to the input signals).
HI: High speed operation
LOW: Low speed operation
OFF: Stop

Monitored item

Unit

Description

Remarks

EC-116

< SYSTEM DESCRIPTION >

[MR18DE]

DIAGNOSIS SYSTEM (ECM)

HO2S2 HTR (B1)

ON/OFF

• Indicates [ON/OFF] condition of heated oxygen sen-

sor 2 heater determined by ECM according to the in-
put signals.

I/P PULLY SPD

rpm

• Indicates the engine speed computed from the input 

shaft revolution signal.

VEHICLE SPEED

km/h or mph

• The vehicle speed computed from the vehicle speed 

signal sent from TCM is displayed.

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 per-
formed successfully.

TRVL AFTER MIL

km or mile

• Distance traveled while MIL is activated.

A/F S1 HTR(B1)

%

• Air fuel ratio (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.

AC PRESS SEN

V

• The signal voltage from the refrigerant pressure sen-

sor is displayed.

A/F ADJ-B1

—

• Indicates the correction of 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.

BUT CUR SEN

mV

• The signal voltage of battery current sensor is dis-

played.

ALT DUTY SIG

ON/OFF

• The control condition of the power generation voltage 

variable control (determined by ECM according to the 
input signals) is indicated.
ON: Power generation voltage variable control is ac-
tive.
OFF: Power generation voltage variable control is in-
active.

ALT DUTY

%

• Indicates the duty ratio of the power generation com-

mand value. The ratio is calculated by ECM based on 
the battery current sensor signal.

VHCL SPEED SE

km/h or mph

• The vehicle speed computed from the vehicle speed 

signal sent from combination meter is displayed.

SET VHCL SPD

km/h or mph

• The preset vehicle speed is displayed.

MAIN SW

ON/OFF

• Indicates [ON/OFF] condition from MAIN switch sig-

nal.

CANCEL SW

ON/OFF

• Indicates [ON/OFF] condition from CANCEL switch 

signal.

RESUME/ACC SW

ON/OFF

• Indicates [ON/OFF] condition from RESUME/ACC 

switch signal.

SET SW

ON/OFF

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

BRAKE SW1

ON/OFF

• Indicates [ON/OFF] condition from ASCD brake 

switch signal and ASCD clutch switch signal (M/T 
models).

BRAKE SW2

ON/OFF

• Indicates [ON/OFF] condition of stop lamp switch sig-

nal.

VHCL SPD CUT

NON/CUT

• Indicates the vehicle cruse 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 oper-
ation is cut off.

Monitored item

Unit

Description

Remarks

DIAGNOSIS SYSTEM (ECM)

EC-117

< SYSTEM DESCRIPTION >

[MR18DE]

C

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LO SPEED CUT

NON/CUT

• Indicates the vehicle cruse condition.

NON: Vehicle speed is maintained at the ASCD set 
speed.
CUT: Vehicle speed decreased to excessively low 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 re-

quest signal from the TCM.

CRUISE LAMP

ON/OFF

• Indicates [ON/OFF] condition of CRUISE lamp deter-

mined 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.

THRTL STK CNT 

B1

*

—

—

EVAP LEAK DIAG

YET/CMPLT

• Indicates the condition of EVAP leak diagnosis.

YET: EVAP leak diagnosis has not been performed 
yet.
CMPLT: EVAP leak diagnosis has been performed 
successfully.

EVAP DIAG READY

ON/OFF

• Indicates the ready condition of EVAP leak diagnosis.

ON: Diagnosis has been ready condition.
OFF: Diagnosis has not been ready condition.

HO2 S2 DIAG1 (B1)

INCMP/CM-

PLT

• Indicates DTC P0139 self-diagnosis (delayed re-

sponse) condition.
INCMP: Self-diagnosis is incomplete.
CMPLT: Self-diagnosis is complete.

HO2 S2 DIAG2 (B1)

INCMP/CM-

PLT

• Indicates DTC P0139 self-diagnosis (slow response) 

condition.
INCMP: Self-diagnosis is incomplete.
CMPLT: Self-diagnosis is complete.

A/F SEN1 
DIAG2(B1)

INCMP/CM-

PLT

• Indicates DTC P014C or P014D self-diagnosis condi-

tion.
INCMP: Self-diagnosis is incomplete.
CMPLT: Self-diagnosis is complete.

A/F SEN1 
DIAG3(B1)

ABSNT/
PRSNT

• Indicates DTC P014C, P014D, P015A or P015B self-

diagnosis condition.
ABSNT: The vehicle condition is not within the diagno-
sis range.
PRSNT: The vehicle condition is within the diagnosis 
range.

SYSTEM 1 DIAG-
NOSIS A B1

INCMP/CM-

PLT

• Indicates DTC P117A self-daiagnosis condition.

INCMP: Self-diagnosis is incomplete.
CMPLT: Self-diagnosis is complete.

SYSTEM 1 DIAG-
NOSIS B B1

ABSENT/

PRSENT

• Indicates DTC P117A self-daiagnosis condition.

ABSENT: Self-diagnosis standby
PRSENT: Under self-diagnosis

A/F-S ATMSPHRC 
CRCT B1

—

Displays a determined value of atmospheric correction 
factor necessary for correcting an A/F sensor signal in-
put to ECM. The signal used for the correction is an A/F 
sensor signal transmitted while driving under atmo-
spheric pressure.

A/F-S ATMSPHRC 
CRCT B2

—

Displays a determined value of atmospheric correction 
factor necessary for correcting an A/F sensor signal in-
put to ECM. The signal used for the correction is an A/F 
sensor signal transmitted while driving under atmo-
spheric pressure.

Monitored item

Unit

Description

Remarks