Nissan Pathfinder. Manual — part 439
EC-62
< SYSTEM DESCRIPTION >
[VQ35DE]
DIAGNOSIS SYSTEM (ECM)
DTCs and 1st trip DTCs related to the malfunction are displayed in “self-diag results”.
• When ECM detects a 1st trip DTC, 1t” is displayed for “TIME”.
• When ECM has detected a current DTC, “0” is displayed for “TIME”.
• If “TIME” is neither “0” nor “1t”, the DTC occurred in the past and ECM shows the number of times the vehi-
cle has been driven since the last detection of the DTC.
How to Erase DTC and 1st Trip DTC
NOTE:
If the ignition switch stays ON after repair work, be sure to turn ignition switch OFF once. Wait at least 10 sec-
onds and then turn it ON (engine stopped) again.
1. Select “ENGINE” with CONSULT.
2. Select “SELF-DIAG RESULTS”.
3. Touch “ERASE”. (DTC in ECM will be erased.)
Freeze Frame Data and 1st Trip Freeze Frame Data
*: The items are the same as those of 1st trip freeze frame data.
DATA MONITOR MODE
NOTE:
The following table includes information (items) inapplicable to this vehicle. For information (items) applicable
to this vehicle, refer to CONSULT display items.
Monitored Item
For reference values of the following items, refer to
.
Freeze frame data item*
Description
DIAG TROUBLE CODE
[PXXXX]
The engine control component part/control system has a trouble code that is displayed as PXXXX. (Re-
fer to
.)
FUEL SYS-B1
• “Fuel injection system status” at the moment a malfunction is detected is displayed.
• One of the following mode 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
FUEL SYS-B2
COMBUST CONDITION
These items are displayed but are not applicable to this model.
CAL/LD VALUE [%]
The calculated load value at the moment a malfunction is detected is displayed.
COOLANT TEMP [
°C] or [°F] 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 sched-
ule than short-term fuel trim.
L-FUEL TRM-B2 [%]
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
schedule.
S-FUEL TRM-B2 [%]
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 [°F]
The intake air temperature at the moment a malfunction is detected is displayed.
DIAGNOSIS SYSTEM (ECM)
EC-63
< SYSTEM DESCRIPTION >
[VQ35DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
×: Applicable
Monitored item
Unit
Monitor Item Selec-
tion
Description
Remarks
ECU IN-
PUT SIG-
NALS
MAIN-
SIG-
NALS
ENG SPEED
rpm
×
×
Indicates the engine speed comput-
ed 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 abnor-
mal value may be indicated.
MAS A/F SE-B1
V
×
×
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, specifi-
cation range is indicated in
“SPEC”.
B/FUEL SCHDL
ms
×
×
“Base fuel schedule” indicates the
fuel injection pulse width pro-
grammed into ECM, prior to any
learned on board correction.
• When engine is running, specifi-
cation range is indicated in
“SPEC”.
A/F ALPHA-B1
%
The mean value of the air-fuel ratio
feedback correction factor per cycle
is indicated.
• When the engine is stopped, a
certain value is indicated.
• This data also includes the data
for the air-fuel ratio learning con-
trol.
• When engine is running, specifi-
cation range is indicated in
“SPEC”.
A/F ALPHA-B2
COOLANT TEMP/S
°C or °F
×
×
The engine coolant temperature (de-
termined by the signal voltage of the
engine coolant temperature sensor)
is displayed.
When the engine coolant tempera-
ture sensor is open or short-circuit-
ed, ECM enters fail-safe mode. The
engine coolant temperature deter-
mined by the ECM is displayed.
A/F SEN1 (B1)
V
×
×
The A/F signal computed from the
input signal of the air fuel ratio (A/F)
sensor 1 is displayed.
HO2S2 (B1)
V
×
×
The signal voltage of the heated ox-
ygen sensor 2 is displayed.
HO2S2 (B2)
×
×
HO2S2 MNTR(B1)
RICH/
LEAN
×
Display of heated oxygen sensor 2
signal:
• RICH: means the amount of oxy-
gen after three way catalyst is rel-
atively small.
• LEAN: means the amount of oxy-
gen after three way catalyst is rel-
atively large.
When the engine is stopped, a cer-
tain value is indicated.
HO2S2 MNTR(B2)
×
VHCL SPEED SE
km/h or
mph
×
×
The vehicle speed computed from
the vehicle speed signal sent from
combination meter is displayed.
BATTERY VOLT
V
The power supply voltage of ECM is
displayed.
ACCEL SEN 1
V
The accelerator pedal position sen-
sor signal voltage 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
V
×
×
The throttle position sensor signal
voltage is displayed.
TP SEN 2-B1 signal is converted by
ECM internally. Thus, it differs from
ECM terminal voltage signal.
TP SEN 2-B1
×
×
EC-64
< SYSTEM DESCRIPTION >
[VQ35DE]
DIAGNOSIS SYSTEM (ECM)
FUEL T/TMP SE
°C or °F
The fuel temperature (determined by
the signal voltage of the fuel tank
temperature sensor) is displayed.
EVAP SYS PRES
V
The signal voltage of EVAP control
system pressure sensor is dis-
played.
FUEL LEVEL SE
V
×
The signal voltage of the fuel level
sensor is displayed.
START SIGNAL
On/Off
Indicates start signal status [On/Off]
computed by the ECM according to
the signals of engine speed and bat-
tery 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] com-
puted by ECM according to the ac-
celerator 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.
PW/ST SIGNAL
On/Off
×
×
[On/Off] condition of the power
steering system (determined by the
signal voltage of the power steering
pressure sensor) 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 lighting switch are
OFF.
IGNITION SW
On/Off
×
×
Indicates [On/Off] condition from ig-
nition 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 signals.
When the engine is stopped, a cer-
tain computed value is indicated.
INJ PULSE-B2
IGN TIMING
BTDC
×
Indicates the ignition timing comput-
ed by ECM according to the input
signals.
When the engine is stopped, a cer-
tain 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 comput-
ed by ECM according to the signal
voltage of the mass air flow sensor.
Monitored item
Unit
Monitor Item Selec-
tion
Description
Remarks
ECU IN-
PUT SIG-
NALS
MAIN-
SIG-
NALS
DIAGNOSIS SYSTEM (ECM)
EC-65
< SYSTEM DESCRIPTION >
[VQ35DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
PURG VOL C/V
%
• Indicates the EVAP canister purge
volume control solenoid valve
control value computed by the
ECM according to the input sig-
nals.
• The opening becomes larger as
the value increases.
INT/V TIM (B1)
°CA
Indicates [
°CA] of intake camshaft
advance angle.
INT/V TIM (B2)
INT/V SOL(B1)
%
• The control value of the intake
valve timing control solenoid valve
(determined by ECM according to
the input signals) is indicated.
• The advance angle becomes larg-
er as the value increases.
INT/V SOL(B2)
VIAS S/V-1
On/Off
The control condition of the VIAS
control solenoid valve 1 (determined
by ECM according to the input sig-
nals) is indicated.
• On: VIAS control solenoid valve 1
is operating.
• Off: VIAS control solenoid valve 1
is not operating.
AIR COND RLY
On/Off
The air conditioner relay control con-
dition (determined by ECM accord-
ing to the input signals) is indicated.
ENGINE MOUNT
IDLE/
TRVL
The control condition of the electron-
ic controlled engine mount (deter-
mined by ECM according to the
input signals) is indicated.
• IDLE: Engine speed is below 950
rpm
• TRVL: Engine speed is above 950
rpm
FUEL PUMP RLY
On/Off
Indicates the fuel pump relay control
condition determined by ECM ac-
cording to the input signals.
VENT CONT/V
On/Off
The control condition of the EVAP
canister vent control valve (deter-
mined by ECM according to the in-
put 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.
A/F S1 HTR(B2)
%
• Air fuel ratio (A/F) sensor 1 heater
control value computed by ECM
according to the input signals.
• The current flow to the heater be-
comes larger as the value increas-
es.
Monitored item
Unit
Monitor Item Selec-
tion
Description
Remarks
ECU IN-
PUT SIG-
NALS
MAIN-
SIG-
NALS
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст