Nissan Tiida C11. Manual - part 531

EC-774

< FUNCTION DIAGNOSIS >

[MR18DE]

ON BOARD DIAGNOSTIC (OBD) SYSTEM

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-760, "Diagnosis Description"

.

WORK SUPPORT MODE

Work Item

*: 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-1020, "DTC Index"

.)

Freeze Frame Data and 1st Trip Freeze Frame Data

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 mixture ratio self-
learning value

TARGET IDLE RPM ADJ*

• IDLE CONDITION

When setting target idle speed

TARGET IGN TIM ADJ*

• IDLE CONDITION

When adjusting target ignition tim-
ing

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-1020, "DTC Index"

.)

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

CAL/LD VALUE [%]

• The calculated load value atathe 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.

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.

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.

ON BOARD DIAGNOSTIC (OBD) SYSTEM

EC-775

< FUNCTION DIAGNOSIS >

[MR18DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

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

DATA MONITOR MODE

Monitored Item

×

: Applicable

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 

displayed.

• When the engine is stopped, a certain 

value is indicated.

• When engine is running specification 

range is indicated 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 specification 

range is indicated in “SPEC”.

A/F ALPHA-B1

%

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

rection factor per cycle is indicated.

• When the engine is stopped, a certain 

value is indicated.

• When engine is running specification 

range is indicated in “SPEC”.

• This data also includes the data for 

the air-fuel ratio learning control.

COOLAN TEMP/S

°

C or 

°

F

• The engine coolant temperature (determined by 

the signal voltage of the engine coolant tempera-
ture sensor) is displayed.

• When the engine coolant temperature 

sensor is open or short-circuited, 
ECM enters fail-safe mode. The en-
gine coolant temperature determined 
by the ECM is displayed.

HO2S1 (B1)

V

• The signal voltage of the heated oxygen sensor 1 

is displayed.

HO2S2 (B1)

V

• The signal voltage of the heated oxygen sensor 2 

is displayed.

HO2S1 MNTR (B1)

RICH/LEAN

• Display of heated oxygen sensor 1 signal during 

air-fuel ratio feedback control:
RICH: means the mixture became “rich”, and 
control is being affected toward a leaner mixture.
LEAN: means the mixture became “lean”, and 
control is being affected toward a rich mixture.

• After turning ON the ignition switch, 

“RICH” is displayed until air-fuel mix-
ture ratio feedback control begins.

• When the air-fuel ratio feedback is 

clamped, the value just before the 
clamping is displayed continuously.

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 dis-
played.

BATTERY VOLT

V

• The power supply voltage of ECM is displayed.

ACCEL SEN 1

V

• The accelerator pedal position sensor signal volt-

age is displayed.

• ACCEL SEN 2 signal is converted by 

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

ACCEL SEN 2

MAIN SW

ON/OFF

• Indicates [ON/OFF] condition from MAIN switch 

signal.

CANCEL SW

ON/OFF

• Indicates [ON/OFF] condition from CANCEL 

switch signal.

THRTL SEN 1-B1

V

• The throttle position sensor signal voltage is dis-

played.

• THRTL SEN 2-B1 signal is converted 

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

THRTL SEN 2-B1

EC-776

< FUNCTION DIAGNOSIS >

[MR18DE]

ON BOARD DIAGNOSTIC (OBD) SYSTEM

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 sig-
nal.

CLSD THL POS

ON/OFF

• Indicates idle position [ON/OFF] computed by 

ECM according to the accelerator pedal position 
sensor signal.

RESUME/ACC SW

ON/OFF

• Indicates [ON/OFF] condition from RESUME/AC-

CELERATE switch signal.

SET SW

ON/OFF

• Indicates [ON/OFF] condition from SET/COAST 

switch signal.

BRAKE SW1

ON/OFF

• Indicates [ON/OFF] condition from ASCD brake 

switch signal or ASCD clutch 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 decreased to excessively 
low compared with the ASCD set speed, and 
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: Vehicle speed decreased to excessively 
low, and ASCD operation is cut off.

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 deter-

mined by the ECM according to the input signals.

AIR COND SIG

ON/OFF

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

er switch as determined by the air conditioner sig-
nal.

P/N POSI SW

ON/OFF

• Indicates [ON/OFF] condition from the park/neu-

tral position (PNP) switch signal.

PW/ST SIGNAL

ON/OFF

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

(determined 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 
lighting switch is in 2nd position.
OFF: Both rear window defogger switch and light-
ing switch are OFF.

IGNITION SW

ON/OFF

• Indicates [ON/OFF] condition from ignition 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.

INJ PULSE-B1

msec

• Indicates the actual fuel injection pulse width 

compensated by ECM according to the input sig-
nals.

• When the engine is stopped, a certain 

computed value is indicated.

CAL/LD VALUE

%

• “Calculated load value” in the current airflow di-

vided by peak airflow.

Monitored item

Unit

Description

Remarks

ON BOARD DIAGNOSTIC (OBD) SYSTEM

EC-777

< FUNCTION DIAGNOSIS >

[MR18DE]

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NOTE:

Any monitored item that does not match the vehicle being diagnosed is deleted from the display automatically.

ACTIVE TEST MODE

Test Item

IGN TIMING

g·m/s

• Indicates the mass airflow computed by ECM ac-

cording to the signal voltage of the mass airflow 
sensor.

PURG VOL C/V

%

• Indicates the EVAP canister purge volume con-

trol solenoid valve control value computed by the 
ECM according to the input signals.

• The opening becomes larger as the value in-

creases.

INT/V TIM (B1)

°

CA

• Indicates [

°

CA] of intake camshaft advance an-

gle. 

INT/V SOL-B1

%

• The control value of the intake valve timing con-

trol solenoid valve (determined by ECM accord-
ing to the input signals) is indicated.

• The advance angle becomes larger as the value 

increases.

AIR COND RLY

ON/OFF

• The air conditioner relay control condition (deter-

mined by ECM according to the input signals) is 
indicated.

FUEL PUMP RLY

ON/OFF

• Indicates the fuel pump relay control condition 

determined by ECM according to the input sig-
nals.

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

• Indicates the condition of the cooling fan (deter-

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

HO2S1 HTR (B1)

ON/OFF

• Indicates [ON/OFF] condition of heated oxygen 

sensor 1 heater determined by ECM accordining 
to the input signals.

HO2S2 HTR (B1)

ON/OFF

• Indicates [ON/OFF] condition of heated oxygen 

sensor 2 heater determined by ECM according to 
the input signals.

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 per-
formed yet.
CMPLT: Idle air volume learning has already 
been performed successfully.

TRVL AFTER MI

km/h or mph

• Distance traveled while MI is activated.

O2SEN HTR DTY

%

• Indicates the heated oxygen sensor 1 heater con-

trol value computed by the ECM according to the 
input signals.

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 combination meter is dis-
played.

Monitored item

Unit

Description

Remarks