Nissan Frontier D22. Manual - part 545
TROUBLE DIAGNOSIS
EC-1283
[VG33ER]
C
D
E
F
G
H
I
J
K
L
M
A
EC
NOTE:
Any monitored item that does not match the vehicle being diagnosed is deleted from the display automatically.
DATA MONITOR (SPEC) MODE
Monitored Items
NOTE:
Any monitored item that does not match the vehicle being diagnosed is deleted from the display automatically.
ACTIVE TEST MODE
Test Item
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]
SCB/V CON S/V
●
The control condition of the SCB valve
control solenoid valve (determined by
ECM according to the input signals) is
indicated.
●
ON: SCB valve is closed.
OFF: SCB valve is opened.
VOLTAGE [V]
●
Voltage measured by the voltage probe.
FREQUENCY
[msec] or [Hz] or [%]
●
Pulse width, frequency or duty cycle
measured by the pulse probe.
●
Only “#” is displayed if item is
unable to be measured.
●
Figures with “#”s are temporary
ones. They are the same figures as
an actual piece of data which was
just previously measured.
Monitored item [Unit]
ECM
INPUT
SIGNALS
MAIN SIG-
NALS
Description
Remarks
Monitored item [Unit]
ECM
input
signals
Main
signals
Description
Remarks
MAS A/F SE-B1 [V]
×
×
●
The signal voltage of the mass air flow sensor
specification is displayed.
●
When the engine is running, specifi-
cation range is indicated.
B/FUEL SCHDL
[msec]
×
●
“Base fuel schedule” indicates the fuel injec-
tion pulse width programmed into ECM, prior
to any learned on board correction.
●
When the engine is running, specifi-
cation range is indicated.
A/F ALPHA-B1 [%]
×
●
Indicates the mean value of the air-fuel ratio
feedback correction factor per cycle.
●
When the engine is running, specifi-
cation range is indicated.
●
This data also includes the data for
the air-fuel ratio learning control.
A/F ALPHA-B2 [%]
×
TEST ITEM
CONDITION
JUDGEMENT
CHECK ITEM (REMEDY)
FUEL INJEC-
TION
●
Engine: Return to the original
trouble condition
●
Change the amount of fuel injec-
tion using CONSULT-II.
If trouble symptom disappears, see
CHECK ITEM.
●
Harness and connector
●
Fuel injector
●
Heated oxygen sensor 1
IGNITION TIM-
ING
●
Engine: Return to the original
trouble condition
●
Timing light: Set
●
Retard the ignition timing using
CONSULT-II.
If trouble symptom disappears, see
CHECK ITEM.
●
Adjust initial ignition timing
IACV-AAC/V
OPENING
●
Engine: After warming up, idle
the engine.
●
Change the IACV-AAC valve
opening percent using CON-
SULT-II.
Engine speed changes according to
the opening percent.
●
Harness and connector
●
IACV-AAC valve