Nissan Frontier. Manual — part 610
DIAGNOSIS SYSTEM (ECM)
EC-1011
< SYSTEM DESCRIPTION >
[VQ40DE FOR MEXICO]
C
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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 com-
pensated by ECM according to the input signals.
• When the engine is stopped, a certain
computed value is indicated.
INJ PULSE-B2
msec
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
current air flow divided by peak air flow.
MASS AIRFLOW
g/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 control
solenoid valve control value computed by the ECM
according to the input signals.
• The opening becomes larger as the value increas-
es.
INT/V TIM(B1)
°CA
• Indicates [
°CA] of intake camshaft advanced angle.
INT/V TIM(B2)
°CA
INT/V SOL(B1)
%
• The control condition of the intake valve timing con-
trol solenoid valve (determined by ECM according
to the input signals) is indicated.
• The advance angle becomes larger as the value in-
creases.
INT/V SOL(B2)
%
VIAS S/V-1
ON/OFF
• The control condition of the VIAS control solenoid
valve (determined by ECM according to the input
signals) is indicated.
ON: VIAS control solenoid valve is operating.
OFF: VIAS control solenoid valve is not operating.
AIR COND RLY
ON/OFF
• The air conditioner relay control condition (deter-
mined by ECM according to the input signals) is in-
dicated.
FUEL PUMP RLY
ON/OFF
• Indicates the fuel pump relay control condition de-
termined 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 signals) is indicated.
ON: Closed
OFF: Open
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
• The control condition of the cooling fan (deter-
mined by ECM according to the input signals) is in-
dicated.
HI: High speed operation
LOW: Low speed operation
OFF: Stop
Monitored item
Unit
Description
Remarks
EC-1012
< SYSTEM DESCRIPTION >
[VQ40DE FOR MEXICO]
DIAGNOSIS SYSTEM (ECM)
HO2S2 HTR (B1)
ON/OFF • Indicates [ON/OFF] condition of heated oxygen
sensor 2 heater determined by ECM according to
the input signals.
HO2S2 HTR (B2)
ON/OFF
I/P PULLY SPD
rpm
• Indicates the engine speed computed from thein-
put speed sensor signal.
VEHICLE SPEED
km/h or
mph
• Indicates the vehicle speed computed from the out-
put speed sensor signal.
IDL A/V LEARN
YET/
CMPLT
• Displays 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 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.
A/F S1 HTR(B2)
%
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 TCM 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
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 brake pedal po-
sition 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 increased to excessively high
compared with the ASCD set speed, and ASCD op-
eration 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
compared with the ASCD set speed, and ASCD op-
eration 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
signal sent from the TCM.
CRUISE LAMP
ON/OFF
• Indicates [ON/OFF] condition of CRUISE lamp de-
termined by the ECM according to the input sig-
nals.
Monitored item
Unit
Description
Remarks
DIAGNOSIS SYSTEM (ECM)
EC-1013
< SYSTEM DESCRIPTION >
[VQ40DE FOR MEXICO]
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SET LAMP
ON/OFF
• Indicates [ON/OFF] condition of SET lamp deter-
mined by the ECM according to the input signals.
ALT DUTY
%
• Indicates the duty ratio of the power generation
command value. The ratio is calculated by ECM
based on the battery current sensor signal.
BAT 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 volt-
age variable control (determined by ECM accord-
ing to the input signals) is indicated.
ON: Power generation voltage variable control is
active
OFF: Power generation voltage variable control is
inactive.
A/F ADJ-B1
—
• Indicates the correction factor saved in ECM. The
factor is calculated from the difference between the
target air-fuel ratio saved in ECM and the air-fuel
ratio calculated from A/F sensor 1 signal.
A/F ADJ-B2
—
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 diagno-
sis.
ON: Diagnosis has been ready condition.
OFF: Diagnosis has not been ready condition.
HO2 S2 DIAG1(B1)
INCMP/
CMPLT
• Indicates DTC P0139 self-diagnosis (delayed re-
sponce) condition.
INCMP: Self-diagnosis is incomplete.
CMPLT: Self-diagnosis is complete.
HO2 S2 DIAG1(B2)
INCMP/
CMPLT
• Indicates DTC P0159 self-diagnosis (delayed re-
sponce) condition.
INCMP: Self-diagnosis is incomplete.
CMPLT: Self-diagnosis is complete.
HO2 S2 DIAG2(B1)
INCMP/
CMPLT
• Indicates DTC P0139 self-diagnosis (slow re-
sponce) condition.
INCMP: Self-diagnosis is incomplete.
CMPLT: Self-diagnosis is complete.
HO2 S2 DIAG2(B2)
INCMP/
CMPLT
• Indicates DTC P0159 self-diagnosis (slow re-
sponce) condition.
INCMP: Self-diagnosis is incomplete.
CMPLT: Self-diagnosis is complete.
THRTL STK CNT B1
*
—
—
A/F-S ATMSPHRC
CRCT B1
—
• Displays a determined value of atmospheric cor-
rection factor necessary for correcting an A/F sen-
sor signal input to ECM.
The signal used for the correction is an A/F sensor
signal transmitted while driving under atmospheric
pressure.
A/F-S ATMSPHRC
CRCT B2
—
• Displays a determined value of atmospheric cor-
rection factor necessary for correcting an A/F sen-
sor signal input to ECM.
The signal used for the correction is an A/F sensor
signal transmitted while driving under atmospheric
pressure.
Monitored item
Unit
Description
Remarks
EC-1014
< SYSTEM DESCRIPTION >
[VQ40DE FOR MEXICO]
DIAGNOSIS SYSTEM (ECM)
*: The item is indicated, but not used.
NOTE:
Any monitored item that does not match the vehicle being diagnosed is deleted from the display automatically.
WORK SUPPORT MODE
Work Item
*: This function is not necessary in the usual service procedure.
ACTIVE TEST MODE
Test Item
A/F-S ATMSPHRC
CRCT UP B1
count
• Displays the number of updates of the A/F sensor
atmospheric correction factor.
A/F-S ATMSPHRC
CRCT UP B2
count
• Displays the number of updates of the A/F sensor
atmospheric correction factor.
Monitored item
Unit
Description
Remarks
WORK ITEM
CONDITION
USAGE
FUEL PRESSURE RELEASE
• Fuel pump will stop by touching “START” during 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 spec-
ified 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 coefficient.
When clearing the coefficient of
self-learning control value
EVAP SYSTEM CLOSE
Close the EVAP canister vent control valve in order to make
EVAP system close under the following conditions.
• IGN SW ON
• Engine not running
• Ambient temperature is above 0
°C (32°F).
• No vacuum and no high pressure in EVAP system
• Fuel tank temp is more than 0
°C (32°F).
• Within 10 minutes after starting “EVAP SYSTEM CLOSE”
• When trying to execute “EVAP SYSTEM CLOSE” under
the condition except above, CONSULT will discontinue it
and display appropriate instruction.
NOTE:
When starting engine, CONSULT may display “BAT-
TERY VOLTAGE IS LOW. CHARGE BATTERY”, even
when using a charged battery.
When detecting EVAP vapor leak
in the EVAP system
VIN REGISTRATION
• In the mode, VIN is registered in ECM.
When registering VIN in ECM
TARGET IDLE RPM ADJ*
• Idle condition
When setting target idle speed
TARGET IGN TIM ADJ*
• Idle condition
When adjusting target ignition tim-
ing
CLSD THL POS LEARN
• Ignition on and engine stopped.
When learning the throttle valve
closed position
SAVING DATA FOR REPLC 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.
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