Nissan Frontier D40. Instruction — part 460
ON BOARD DIAGNOSTIC (OBD) SYSTEM
EC-531
< FUNCTION DIAGNOSIS >
[VQ40DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
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
V
TP SEN 1-B1
V
• The throttle position sensor signal voltage is dis-
played.
• THRTL SEN 2 signal is converted by
ECM internally. Thus, it differs from ECM
terminal voltage signal.
TP SEN 2-B1
V
FUEL T/TMP SE
°
C or
°
F
• The fuel temperature (determined by the signal
voltage of the fuel tank temperature sensor) is dis-
played.
INT/A TEMP SE
°
C or
°
F
• The intake air temperature (determined by the sig-
nal voltage of the intake air temperature sensor) is
indicated.
EVAP SYS PRES
V
FUEL LEVEL SE
V
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 signal.
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 conditioner
switch as determined by the air conditioner signal.
P/N POSI SW
ON/OFF
• Indicates [ON/OFF] condition from the park/neutral
position (PNP) signal.
PW/ST SIGNAL
ON/OFF
• [ON/OFF] condition of the power steering system
(determined by the signal voltage of the power
steering pressure sensor signal) 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 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·m/s
• Indicates the mass air flow computed by ECM ac-
cording to the signal voltage of the mass air flow
sensor.
Monitored item
Unit
Description
Remarks
EC-532
< FUNCTION DIAGNOSIS >
[VQ40DE]
ON BOARD DIAGNOSTIC (OBD) SYSTEM
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
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 the in-
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.
Monitored item
Unit
Description
Remarks
ON BOARD DIAGNOSTIC (OBD) SYSTEM
EC-533
< FUNCTION DIAGNOSIS >
[VQ40DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
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 ASCD brake
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.
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
—
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.
Monitored item
Unit
Description
Remarks
EC-534
< FUNCTION DIAGNOSIS >
[VQ40DE]
ON BOARD DIAGNOSTIC (OBD) SYSTEM
NOTE:
Any monitored item that does not match the vehicle being diagnosed is deleted from the display automatically.
ACTIVE TEST MODE
Test Item
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.
Monitored item
Unit
Description
Remarks
TEST ITEM
CONDITION
JUDGEMENT
CHECK ITEM (REMEDY)
FUEL INJEC-
TION
• Engine: Return to the original
non-standard condition
• Change the amount of fuel injec-
tion using CONSULT-III.
If malfunctioning symptom disap-
pears, see CHECK ITEM.
• Harness and connectors
• Fuel injector
• Air fuel ratio (A/F) sensor 1
IGNITION TIM-
ING
• Engine: Return to the original
non-standard condition
• Timing light: Set
• Retard the ignition timing using
CONSULT-III.
If malfunctioning symptom disap-
pears, see CHECK ITEM.
• Perform Idle Air Volume Learning.
POWER BAL-
ANCE
• Engine: After warming up, idle the
engine.
• A/C switch: OFF
• Shift lever: P or N (A/T), Neutral
(M/T)
• Cut off each fuel injector signal
one at a time using CONSULT-III.
Engine runs rough or stops.
• Harness and connectors
• Compression
• Fuel injector
• Power transistor
• Spark plug
• Ignition coil
COOLING FAN*
• Ignition switch: ON
• Turn the cooling fan HI, LOW and
OFF using CONSULT-III.
Cooling fan moves and stops.
• Harness and connectors
• Cooling fan motor
• IPDM E/R
ENG COOLANT
TEMP
• Engine: Return to the original
non-standard condition
• Change the engine coolant tem-
perature using CONSULT-III.
If mulfunctioning symptom disap-
pears, see CHECK ITEM.
• Harness and connectors
• Engine coolant temperature sen-
sor
• Fuel injector
FUEL PUMP RE-
LAY
• Ignition switch: ON (Engine
stopped)
• Turn the fuel pump relay ON and
OFF using CONSULT-III and lis-
ten to operating sound.
Fuel pump relay makes the operat-
ing sound.
• Harness and connectors
• Fuel pump relay
VIAS SOL VALVE
• Ignition switch: ON
• Turn solenoid valve ON and OFF
with CONSULT-III and listen for
operating sound.
Solenoid valve makes an operating
sound.
• Harness and connectors
• Solenoid valve
PURG VOL
CONT/V
• Engine: After warming up, run en-
gine at 1,500 rpm.
• Change the EVAP canister purge
volume control solenoid valve
opening percent using CON-
SULT-III.
Engine speed changes according to
the opening percent.
• Harness and connectors
• Solenoid valve
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