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Nissan Qashqai J11. Manual - part 273

DIAGNOSIS SYSTEM (ECM)

ECM-69

< SYSTEM DESCRIPTION >

[MR20DD]

ECM

IDL A/V LEARN

YET/

DONE

Displays the condition of Idle Air Volume Learning.
• YET...Idle air volume learning has not been per-

formed yet.

• DONE...Idle air volume learning has already been

performed successfully.

TRVL AFTER MIL

km or

mile

Distance traveled while MIL is activated.

ENG OIL TEMP

The engine oil temperature (determined by the signal
voltage of the engine oil temperature sensor) is dis-
played.

A/F S1 HTR (B1)

• Indicates the duty ratio of the Air fuel ratio (A/F) sen-

sor 1 heater computed by ECM according to the input
signals.

• The current flow to the heater becomes larger as the

value increases.

VHCL SPEED SE

km/h or

mph

The vehicle speed computed from the vehicle speed
signal sent from unified meter and 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 signal.

CANCEL SW

ON/

OFF

Indicates [ON/OFF] condition from CANCEL switch sig-
nal.

RESUME/ACC SW

ON/

OFF

Indicates [ON/OFF] condition from RESUME/ACCEL-
ERATE switch signal.

SET SW

ON/

OFF

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

BRAKE SW1

ON/

OFF

Indicates [ON/OFF] condition from brake pedal position
switch signal.

BRAKE SW2

ON/

OFF

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

VHCL SPD CUT

NON/

CUT

Indicates the vehicle cruise condition.
• NON...Vehicle speed is maintained at the ASCD set

speed.

• CUT...When the vehicle speed decreased to exces-

sively low speed compared with the ASCD set speed,
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...When the vehicle speed decreased lower than

the ASCD minimum set speed, ASCD operation is cut
off.

AT OD MONITOR

ON/

OFF

Indicates [ON/OFF] condition of A/T O/D according to
the input signal from the TCM.

AT OD CANCEL

ON/

OFF

Indicates [ON/OFF] condition of A/T O/D cancel request
signal.

CRUISE LAMP

ON/

OFF

Indicates [ON/OFF] condition of CRUISE indicator de-
termined by the ECM according to the input signals.

SET LAMP

ON/

OFF

Indicates [ON/OFF] condition of SET indicator deter-
mined by the ECM according to the input signals.

A/F ADJ-B1

—

Indicates the correction of a factor stored in ECM. The
factor is calculated from the difference between the tar-
get air-fuel ratio stored in ECM and the air-fuel ratio cal-
culated from A/F sensor 1 signal.

Monitored item

Unit

Description

Remarks

ECM-70

< SYSTEM DESCRIPTION >

[MR20DD]

DIAGNOSIS SYSTEM (ECM)

NOTE:

Any monitored item that does not match the vehicle is not displayed.

*: Indicates intake manifold runner control valve.

WORK SUPPORT MODE

Work Item

P/N POSI SW

ON/

OFF

Indicates [ON/OFF] condition from the reverse/neutral
position signal.

INT/A TEMP SE

C or

The intake air temperature (determined by the signal
voltage of the intake air temperature sensor) is indicat-
ed.

AC PRESS SEN

The signal voltage from the refrigerant pressure sensor
is displayed.

FUEL PRESS SEN

MPa

Indicates the fuel rail pressure computed by ECM ac-
cording to the input signals.

ATOM PRES SEN

The signal voltage from the barometric pressure sensor
is displayed.

FUEL INJ B1

msec

ECM-calculated injection pulse width of the fuel injector
on the Bank 1 side.

H/P FUEL PUMP DEG

deg

Displays ECM-calculated fuel discharge position of the
high pressure fuel pump.

FUEL PRES SEN V

The signal voltage of FRP sensor is displayed.

EOP SENSOR

The signal voltage of EOP sensor is displayed.

ECM TEMP 1

Displays a temperature calculated from a signal of ECM
temperature sensor 1.

ECM TEMP 2

Displays a temperature calculated from a signal of ECM
temperature sensor 2.

FUEL INJ TIM

BTDC

Indicates the fuel injection timing computed by ECM ac-
cording to the input signals.

FAN DUTY

• Indicates a command value for cooling fan. The value

is calculated by ECM based on input signals.

THRTL STK CNT B1

—

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

A/F SEN1 (B1)

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

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

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
UP B1

count

Displays the number of updates of the A/F sensor atmo-
spheric correction factor.

A/F SEN1 DIAG2(B1)

INCMP/

CMPLT

• 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 diag-

nosis range.

- PRSNT: The vehicle condition is within the diagnosis

range.

Monitored item

Unit

Description

Remarks

DIAGNOSIS SYSTEM (ECM)

ECM-71

< SYSTEM DESCRIPTION >

[MR20DD]

ECM

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

ACTIVE TEST MODE

Test Item

Work item

Condition

Usage

IDLE AIR VOL LEARN

The idle air volume that keeps the engine speed within the
specified range is memorized in ECM.

When learning the idle air volume

FUEL PRESSURE RE-
LEASE

• Fuel pump will stop by touching “START” during idling.
• Crank a few times after engine stops.

When releasing fuel pressure from fuel line

TARGET IDLE RPM
ADJ*

Idle condition

When setting target idle speed

SELF-LEARNING
CONT

The coefficient of self-learning control mixture ratio returns
to the original coefficient.

When clearing mixture ratio selflearning
value.

TARGET IGN TIM ADJ*

Idle condition

When adjusting target ignition timing

VIN REGISTRATION

In this mode, VIN is registered in ECM.

When registering VIN in ECM

CLSD THL POS LEARN

Ignition switch ON and engine stopped.

When learning the throttle valve closed po-
sition

SAVING DATA FOR RE-
PLC CPU

In this mode, save data that is in ECM.

When ECM is replaced.

WRITING DATA FOR
REPLC CPU

In this mode, write data stored by “SAVE DATA FOR CPU
REPLC” in work support mode to ECM.

When ECM is replaced.

TEST ITEM

CONDITION

JUDGMENT

CHECK ITEM (REMEDY)

ENG COOLANT
TEMP

Change the engine coolant tempera-
ture using CONSULT.

If malfunctioning symptom dis-
appears, see CHECK ITEM.

• Harness and connectors
• Engine coolant temperature

sensor

• Fuel injector

FUEL INJECTION

Change the amount of fuel injection
using CONSULT.

If malfunctioning symptom dis-
appears, see CHECK ITEM.

• Harness and connectors
• Fuel injector
• Air fuel ratio (A/F) sensor 1

PURG VOL CONT/V

• Engine: After warming up, run en-

gine at 1,500 rpm.

• Change the EVAP canister purge

volume control solenoid valve open-
ing percent using CONSULT.

Engine speed changes accord-
ing to the opening percent.

• Harness and connectors
• EVAP canister purge volume

control solenoid valve

FUEL PUMP RELAY

• Ignition switch: ON (Engine

stopped)

• Turn the fuel pump relay “ON” and

“OFF” using CONSULT and listen to
operating sound.

Fuel pump relay makes the op-
erating sound.

• Harness and connectors
• Fuel pump relay

INTAKE MANIFOLD
RUNNER CON-
TROL VALVE
(OPEN/CLOSE)

• Ignition switch: ON (Engine

stopped)

• Turn the intake manifold runner con-

trol valve “ON” and “OFF” using
CONSULT to open or close.

Touch the intake manifold run-
ner control valve motor and
check the operating vibration
and sound.

• Harness and connectors
• Intake manifold runner control

valve

• Intake manifold runner control

valve motor

FAN DUTY CON-

TROL

• Engine: Idle
• Change duty ratio (0 - 100%) using

CONSULT.

Cooling fan moves and stops.

• Harness and connectors
• Cooling fan motor
• Cooling fan relay
• IPDM E/R

IGNITION TIMING

• Timing light: Set
• Retard the ignition timing using

CONSULT.

If malfunctioning symptom dis-
appears, see CHECK ITEM.

Perform Idle Air Volume Learn-
ing.

ECM-72

< SYSTEM DESCRIPTION >

[MR20DD]

DIAGNOSIS SYSTEM (ECM)

*: Leaving cooling fan OFF with CONSULT while engine is running may cause the engine to overheat.

DTC WORK SUPPORT MODE

Teat Item

SRT & P-DTC MODE

SRT STATUS Mode

For items whose SRT codes are set, “CMPLT” is displayed on the CONSULT screen; for items whose SRT-
codes are not set, “INCMP” is displayed.

SRT WORK SUPPORT Mode

This mode enables a technician to drive a vehicle to set the SRT while monitoring the SRT status.

POWER BALANCE

• Engine: After warming up, idle the

engine.

• A/C switch OFF
• Selector lever: N (CVT), Neutral (M/

• Cut off each injector signal one at a

time using CONSULT.

Engine runs rough or stops.
(Works for accidental fire.)

• Harness and connectors
• Compression
• Fuel injector
• Power transistor
• Spark plug
• Ignition coil

INT V/T ASSIGN AN-
GLE

Changes intake valve timing using
CONSULT.

If malfunctioning symptom dis-
appears, see CHECK ITEM.

• Harness and connectors
• Intake valve timing control so-

lenoid valve

EXT V/T ASSIGN
ANGLE

Changes exhaust valve timing using
CONSULT.

If malfunctioning symptom dis-
appears, see CHECK ITEM.

• Harness and connectors
• Exhaust valve timing control

solenoid valve

TEST ITEM

CONDITION

JUDGMENT

CHECK ITEM (REMEDY)

Test mode

Test item

Reference page

HO2S2

O2 (B1) P0138

ECM-212, "DTC Description"

O2 (B1) P0137

ECM-206, "DTC Description"

A/F SEN1

A/F (B1) P0133

ECM-225, "DTC Description"

A/F (B1) P0130

ECM-197, "DTC Description"

Content .. 271 272 273 274 ..