Nissan Juke F15. Instruction — part 318

DIAGNOSIS SYSTEM (ECM)

EC-85

< SYSTEM DESCRIPTION >

[MR FOR NISMO RS MODELS]

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How to Erase DTC and 1st Trip DTC

NOTE:

• If the ignition switch stays ON after repair work, be sure to turn ignition switch OFF once. Wait at least 10

seconds and then turn it ON (engine stopped) again.

• If the DTC is not for CVT related items (see

EC-115, "DTC Index"

), skip step 1.

1. Erase DTC in TCM. Refer to

TM-190, "CONSULT Function"

.

2. Select “ENGINE” with CONSULT.
3. Select “SELF-DIAG RESULTS”.
4. Touch “ERASE”. (DTC in ECM will be erased.)

Freeze Frame Data and 1st Trip Freeze Frame Data

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

DATA MONITOR MODE

NOTE:

The following table includes information (items) inapplicable to this vehicle. For information (items) applicable

to this vehicle, refer to CONSULT display items.

Monitored Item

For reference values of the following items, refer to

EC-96, "Reference Value"

.

Freeze frame data

item*

Description

DIAG TROUBLE
CODE
[PXXXX]

• The engine control component part/control system has a trouble code the is displayed as PXXXX. (Refer to

EC-115, "DTC Index"

.)

FUEL SYS-B1

• “Fuel injection system status” at the moment a malfunction is detected is displayed.
• One of the following mode 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 [

°C]

or [

°F]

• 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 sched-

ule.

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.

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 [

°C]

or [

°F]

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

INT MANI PRES [kPa]

• These items are displayed but are not applicable to this model.

COMBUST CONDI-
TION

EC-86

< SYSTEM DESCRIPTION >

[MR FOR NISMO RS MODELS]

DIAGNOSIS SYSTEM (ECM)

×: Applicable

Monitored item

Unit

Monitor Item Selec-

tion

Description

Remarks

ECU IN-

PUT
SIG-

NALS

MAIN

SIG-

NALS

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.

• When engine is running

specification range is indi-
cated in “SPEC”.

B/FUEL SCHDL

msec

×

×

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

When engine is running speci-
fication range is indicated in
“SPEC”.

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.

• When engine is running

specification range is indi-
cated in “SPEC”.

• This data also includes the

data for the air-fuel ratio
learning control.

COOLANT TEMP/S

°C or °F

×

×

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

When the engine coolant tem-
perature sensor is open or
short-circuited, ECM enters
fail-safe mode. The engine
coolant temperature deter-
mined by the ECM is dis-
played.

A/F SEN1 (B1)

V

×

×

The A/F signal computed from the in-
put signal of the air fuel ratio (A/F) sen-
sor 1 is displayed.

HO2S2 (B1)

V

×

×

The signal voltage of the heated oxy-
gen 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 combi-
nation meter is displayed.

BATTERY VOLT

V

The power supply voltage of ECM is
displayed.

DIAGNOSIS SYSTEM (ECM)

EC-87

< SYSTEM DESCRIPTION >

[MR FOR NISMO RS MODELS]

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ACCEL SEN 1

V

The accelerator pedal position sensor
signal voltage is displayed.

ACCEL SEN 2 signal is con-
verted by ECM internally.
Thus, it differs from ECM ter-
minal voltage signal.

ACCEL SEN 2

TP SEN 1-B1

V

×

×

The throttle position sensor signal volt-
age is displayed.

TP SEN 2-B1 signal is con-
verted by ECM internally.
Thus, it differs from ECM ter-
minal voltage signal.

TP SEN 2-B1

×

×

FUEL T/TMP SE

°C or °F

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

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 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 displayed regardless
of the starter signal.

CLSD THL POS

ON/OFF

×

×

Indicates idle position [ON/OFF] com-
puted by ECM according to the accel-
erator 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.

PW/ST SIGNAL

ON/OFF

×

×

[ON/OFF] condition of the power steer-
ing system (determined by the signal
sent from EPS control unit) is indicat-
ed.

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 ig-
nition switch signal.

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.

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.

COMBUSTION

—

These items are displayed but are not
applicable to this model.

CAL/LD VALUE

%

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

MASS AIRFLOW

g/s

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

Monitored item

Unit

Monitor Item Selec-

tion

Description

Remarks

ECU IN-

PUT
SIG-

NALS

MAIN

SIG-

NALS

EC-88

< SYSTEM DESCRIPTION >

[MR FOR NISMO RS MODELS]

DIAGNOSIS SYSTEM (ECM)

PURG VOL C/V

%

• Indicates the EVAP canister purge

volume control solenoid valve con-
trol 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 ad-

vance angle.

EXHV TIM B1

°CA

Indicates [

°CA] of exhaust camshaft

advance angle.

INT/V SOL(B1)

%

• The control value of the intake valve

timing control solenoid valve (deter-
mined by ECM according to the in-
put signals) is indicated.

• The advance angle becomes larger

as the value increases.

AIR COND RLY

ON/OFF

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

FUEL PUMP RLY

ON/OFF

Indicates the fuel pump relay control
condition determined by ECM accord-
ing to the input signals.

VENT CONT/V

ON/OFF

• The control condition of the EVAP

canister vent control valve (deter-
mined by ECM according to the in-
put signals) is displayed.

- ON: Closed
- OFF: Open

THRTL RELAY

ON/OFF

Indicates the throttle control motor re-
lay control condition determined by the
ECM according to the input signals.

HO2S2 HTR (B1)

ON/OFF

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

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 vari-

able control is active.

- OFF: Power generation

I/P PULLY SPD

rpm

Indicates the engine speed computed
from the input speed sensor 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 Vol-

ume Learning

- YET: Idle air volume learning has not

been performed yet.

- CMPLT: Idle air volume learning has

already been performed successful-
ly.

Monitored item

Unit

Monitor Item Selec-

tion

Description

Remarks

ECU IN-

PUT
SIG-

NALS

MAIN

SIG-

NALS