Nissan March K13. Manual - part 149

ON BOARD DIAGNOSTIC (OBD) SYSTEM

EC-57

< SYSTEM DESCRIPTION >

[HR12DE (TYPE 1)]

• The A counter will be cleared when the malfunction is detected regardless of (1) - (4).
• The A counter will be counted up when (1) - (4) are satisfied without the same malfunction.
• The DTC will not be displayed after the A counter reaches 40.
<Driving Pattern B>
Driving pattern B means the vehicle operation as follows:
All components and systems should be monitored at least once by the OBD system.
• The B counter will be cleared when the malfunction is detected once regardless of the driving pattern.
• The B counter will be counted up when driving pattern B is satisfied without any malfunctions.
• The MIL will go off when the B counter reaches 3 (*2 in OBD SYSTEM OPERATION CHART).

CONSULT-III Function

INFOID:0000000005989198

FUNCTION

*: The following emission-related diagnostic information is cleared when the ECM memory is erased.

• Diagnostic trouble codes

• 1st trip diagnostic trouble codes

• Freeze frame data

• 1st trip freeze frame data

• System readiness test (SRT) codes

• Test values

SELF DIAGNOSTIC RESULT MODE

Self Diagnostic Item

Regarding items of DTC and 1st trip DTC, refer to

EC-78, "DTC Index"

Freeze Frame Data and 1st Trip Freeze Frame Data

JMBIA1920GB

Diagnostic test mode

Function

Ecu Identification

ECM part number can be read.

Self Diagnostic Result

Self-diagnostic results such as 1st trip DTC, DTCs and 1st trip freeze frame data or freeze frame data
can be read and erased quickly.*

Data Monitor

Input/Output data in the ECM can be read.

Active Test

Diagnostic Test Mode in which CONSULT-III drives some actuators apart from the ECMs and also shifts
some parameters in a specified range.

Function Test

This mode is used to inform customers when their vehicle condition requires periodic maintenance.

Work support

This mode enables a technician to adjust some devices faster and more accurately by following the in-
dications on the CONSULT-III unit.

DTC & SRT Confirmation

The status of system monitoring tests and the self-diagnosis status/result can be confirmed.

EC-58

< SYSTEM DESCRIPTION >

[HR12DE (TYPE 1)]

ON BOARD DIAGNOSTIC (OBD) SYSTEM

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

DATA MONITOR MODE

Monitored Item

Freeze frame data

item*

Description

DTC RESULTS

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

EC-78, "DTC Index"

CAL/LD VALUE [%]

• The calculated load value at the moment a malfunction is detected is displayed.

COOLANT TEMP
[

C] or [

• 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.

INT MANI PRES [kPa]

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

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 [

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

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

COMBUST CONDI-
TION

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

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

• 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.

ON BOARD DIAGNOSTIC (OBD) SYSTEM

EC-59

< SYSTEM DESCRIPTION >

[HR12DE (TYPE 1)]

COOLAN TEMP/S

C or

• 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.

A/F SEN1 (B1)

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

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

HO2S2 (B1)

• 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 dis-
played.

BATTERY VOLT

• The power supply voltage of ECM is displayed.

ACCEL SEN 1

• 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

TP SEN 1-B1

• 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

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.

AIR COND SIG

ON/OFF

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

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

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.

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

Description

Remarks

EC-60

< SYSTEM DESCRIPTION >

[HR12DE (TYPE 1)]

ON BOARD DIAGNOSTIC (OBD) SYSTEM

MASS AIRFLOW

g·m/s

• Indicates the mass air flow computed by ECM ac-

cording to the signal voltage of the mass air flow
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.

EGR VOL CON/V

step

• Indicates the EGR volume control value comput-

ed by the ECM according to the input signals.

• The opening becomes larger as the value in-

creases.

INT/V TIM(B1)

• 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: High speed operation

OFF: Stop

HO2S2 HTR (B1)

ON/OFF

• Indicates [ON/OFF] condition of heated 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 ac-
cording to the input signals) is indicated.
ON: Power generation voltage variable control is
active.
OFF: Power generation voltage variable control
is inactive.

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

• Displays the condition of Idle Air Volume Learn-

ing
YET: Idle air volume learning has not been per-
formed 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)

• Air fuel ratio (A/F) sensor 1 heater control value

computed by ECM according to the input signals.

• The current flow to the heater becomes larger as

the value increases.

Monitored item

Unit

Description

Remarks

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