Nissan Frontier D22. Manual — part 545
TROUBLE DIAGNOSIS
EC-1283
[VG33ER]
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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
EC-1284
[VG33ER]
TROUBLE DIAGNOSIS
DTC & SRT CONFIRMATION MODE
SRT STATUS Mode
For details, refer to
EC-1225, "SYSTEM READINESS TEST (SRT) CODE"
SRT Work Support Mode
This mode enables a technician to drive a vehicle to set the SRT while monitoring the SRT status.
POWER BAL-
ANCE
●
Engine: After warming up, idle
the engine.
●
A/C switch OFF
●
Shift lever: N (A/T), Neutral (M/T)
●
Cut off each injector signal one at
a time using CONSULT-II.
Engine runs rough or dies.
●
Harness and connector
●
Compression
●
Fuel injector
●
Power transistor
●
Spark plug
●
Ignition coil
ENG COOLANT
TEMP
●
Engine: Return to the original
trouble condition
●
Change the engine coolant tem-
perature using CONSULT-II.
If trouble symptom disappears, see
CHECK ITEM.
●
Harness and connector
●
Engine coolant temperature sen-
sor
●
Fuel injector
FUEL PUMP
RELAY
●
Ignition switch: ON
(Engine stopped)
●
Turn the fuel pump relay “ON”
and “OFF” using CONSULT-II
and listen to operating sound.
Fuel pump relay makes the operat-
ing sound.
●
Harness and connector
●
Fuel pump relay
PURG VOL
CONT/V
●
Engine: After warming up, run
engine at 1,500 rpm.
●
Change the EVAP canister purge
volume control solenoid valve
opening percent using CON-
SULT-II.
Engine speed changes according to
the opening percent.
●
Harness and connector
●
Solenoid valve
FUEL/T TEMP
SEN
●
Change the fuel tank temperature using CONSULT-II.
VENT CON-
TROL/V
●
Ignition switch: ON
(Engine stopped)
●
Turn solenoid valve “ON” and
“OFF” with the CONSULT-II and
listen to operating sound.
Solenoid valve makes an operating
sound.
●
Harness and connector
●
Solenoid valve
VC/V BYPASS/V
●
Ignition switch: ON
(Engine stopped)
●
Turn solenoid valve “ON” and
“OFF” with the CONSULT-II and
listen to operating sound.
Solenoid valve makes an operating
sound.
●
Harness and connector
●
Solenoid valve
TEST ITEM
CONDITION
JUDGEMENT
CHECK ITEM (REMEDY)
TROUBLE DIAGNOSIS
EC-1285
[VG33ER]
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EC
DTC Work Support Mode
REAL TIME DIAGNOSIS IN DATA MONITOR MODE (RECORDING VEHICLE DATA)
Description
CONSULT-II has two kinds of triggers and they can be selected by
touching “SETTING” in “DATA MONITOR” mode.
1.
“AUTO TRIG” (Automatic trigger):
●
The malfunction will be identified on the CONSULT-II screen in
real time.
In other words, DTC/1st trip DTC and malfunction item will be
displayed if the malfunction is detected by ECM.
At the moment a malfunction is detected by ECM, “MONITOR”
in “DATA MONITOR” screen is changed to “Recording Data ...
xx%” as shown at left, and the data after the malfunction detec-
tion is recorded. Then when the percentage reached 100%,
“REAL-TIME DIAG” screen is displayed. If “STOP” is touched on
the screen during “ Recording Data ... xx%”, “REAL-TIME DIAG” screen is also displayed.
The recording time after the malfunction detection and the
recording speed can be changed by “TRIGGER POINT” and
“Recording Speed”. Refer to CONSULT-II OPERATION MAN-
UAL.
2.
“MANU TRIG” (Manual trigger):
●
DTC/1st trip DTC and malfunction item will not be displayed
automatically on CONSULT-II screen even though a malfunction
is detected by ECM.
DATA MONITOR can be performed continuously even though a
malfunction is detected.
Operation
1.
“AUTO TRIG”
Test mode
Test item
Condition
Reference page
EVAPRATIVE SYSTEM
EVAP SML LEAK P0442/P1442
Refer to corresponding
trouble diagnosis for DTC.
EVAP V/S LEAK P0456/P1456
PURG VOL CN/V P1444
PURGE FLOW P0441
VC CUT/V BP/V P1491
HO2S1
HO2S1 (B1) P0134
HO2S1 (B1) P1143
HO2S1 (B1) P1144
HO2S1 (B1) P0133
HO2S1 (B2) P0154
HO2S1 (B2) P1163
HO2S1 (B2) P1164
HO2S1 (B2) P0153
HO2S2
HO2S2 (B1) P1146
HO2S2 (B1) P1147
HO2S2 (B1) P0139
HO2S2 (B2) P1166
HO2S2 (B2) P1167
HO2S2 (B2) P0159
SEF705Y
SEF707X
EC-1286
[VG33ER]
TROUBLE DIAGNOSIS
●
While trying to detect the DTC/1st trip DTC by performing the “DTC Confirmation Procedure”, be sure to
select to “DATA MONITOR (AUTO TRIG)” mode. You can confirm the malfunction at the moment it is
detected.
●
While narrowing down the possible causes, CONSULT-II should be set in “DATA MONITOR (AUTO
TRIG)” mode, especially in case the incident is intermittent.
When you are inspecting the circuit by gently shaking (or twisting) the suspicious connectors, components
and harness in the DTC Confirmation Procedure, the moment a malfunction is found the DTC/1st trip DTC
will be displayed. (Refer to
GI-25, "How to Perform Efficient Diagnosis for an Electrical Incident"
2.
“MANU TRIG”
●
If the malfunction is displayed as soon as “DATA MONITOR” is selected, reset CONSULT-II to “MANU
TRIG”. By selecting “MANU TRIG” you can monitor and store the data. The data can be utilized for further
diagnosis, such as a comparison with the value for the normal operating condition.
Generic Scan Tool (GST) Function
UBS00DSD
DESCRIPTION
Generic Scan Tool (OBDII scan tool) complying with SAE J1978 has
7 different functions explained on the next page.
ISO9141 is used as the protocol.
The name “GST” or “Generic Scan Tool” is used in this service man-
ual.
SEF720X
SEF139P
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