Nissan Teana J32. Instruction — part 394
EC-114
< FUNCTION DIAGNOSIS >
[VQ25DE, VQ35DE]
ON BOARD DIAGNOSTIC (OBD) SYSTEM
• 1st trip freeze frame data
• System readiness test (SRT) codes
• Test values
ENGINE CONTROL COMPONENT PARTS/CONTROL SYSTEMS APPLICATION
Item
DIAGNOSTIC TEST MODE
WORK
SUPPORT
SELF-DIAGNOSTIC
RESULTS
DATA
MONI-
TOR
ACTIVE
TEST
DTC & SRT
CONFIRMATION
DTC*
1
FREEZE
FRAME
DATA*
2
SRT STA-
TUS
DTC
WORK
SUP-
PORT
ENGINE CONTROL COMP
O
N
E
N
T P
A
R
T
S
INPUT
Crankshaft position sensor (POS)
×
×
×
Camshaft position sensor (PHASE)
×
×
×
Mass air flow sensor
×
×
Engine coolant temperature sensor
×
×
×
×
Engine oil temperature sensor
×
Air fuel ratio (A/F) sensor 1
×
×
×
×
Heated oxygen sensor 2
×
×
×
×
Vehicle speed signal
×
×
×
Accelerator pedal position sensor
×
×
Throttle position sensor
×
×
×
Intake air temperature sensor
×
×
Knock sensor
×
Refrigerant pressure sensor
×
Closed throttle position switch (accel-
erator pedal position sensor signal)
×
Air conditioner switch
×
Park/neutral position (PNP) signal
×
×
Stop lamp switch
×
×
Power steering pressure sensor
×
×
Battery voltage
×
Load signal
×
Primary speed sensor
×
×
Battery current sensor
×
×
ASCD steering switch
×
×
ASCD brake switch
×
×
ON BOARD DIAGNOSTIC (OBD) SYSTEM
EC-115
< FUNCTION DIAGNOSIS >
[VQ25DE, VQ35DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
X: Applicable
*1: This item includes 1st trip DTCs.
*2: This mode includes 1st trip freeze frame data or freeze frame data. The items appear on CONSULT-III screen in freeze frame data
mode only if a 1st trip DTC or DTC is detected. For details, refer to
EC-102, "Diagnosis Description"
*3: Always “CMPLT” is displayed.
WORK SUPPORT MODE
Work Item
*: This function is not necessary in the usual service procedure.
SELF-DIAG RESULTS MODE
Self Diagnostic Item
Regarding items of DTC and 1st trip DTC, refer to
ENGINE CONTROL COMPON
E
N
T P
A
R
T
S
OU
T
P
U
T
Fuel injector
×
×
Power transistor (Ignition timing)
×
×
Throttle control motor relay
×
×
Throttle control motor
×
EVAP canister purge volume control
solenoid valve
×
×
×
×
Air conditioner relay
×
Fuel pump relay
×
×
×
Cooling fan relay
×
×
×
Air fuel ratio (A/F) sensor 1 heater
×
×
×
*
3
Heated oxygen sensor 2 heater
×
×
×
*
3
Intake valve timing control solenoid
valve
×
×
×
VIAS control solenoid valve 1
×
×
×
VIAS control solenoid valve 2
×
×
×
Electronic controlled engine mount
×
×
Alternator
×
×
Calculated load value
×
×
Item
DIAGNOSTIC TEST MODE
WORK
SUPPORT
SELF-DIAGNOSTIC
RESULTS
DATA
MONI-
TOR
ACTIVE
TEST
DTC & SRT
CONFIRMATION
DTC*
1
FREEZE
FRAME
DATA*
2
SRT STA-
TUS
DTC
WORK
SUP-
PORT
WORK ITEM
CONDITION
USAGE
FUEL PRESSURE RELEASE
• FUEL PUMP WILL STOP BY TOUCHING “START” DUR-
ING 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 SPECIFIED 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 COEF-
FICIENT.
When clearing mixture ratio self-
learning value
TARGET IDLE RPM ADJ*
• IDLE CONDITION
When setting target idle speed
TARGET IGN TIM ADJ*
• IDLE CONDITION
When adjusting target ignition tim-
ing
EC-116
< FUNCTION DIAGNOSIS >
[VQ25DE, VQ35DE]
ON BOARD DIAGNOSTIC (OBD) SYSTEM
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
Monitored Item
×
: Applicable
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. (Refer
FUEL SYS-B1
• “Fuel injection system status” at the moment a malfunction is detected is displayed.
• One of in 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
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 schedule
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.
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.
INT MANI PRES [kPa]
• These items are displayed but are not applicable to this model.
COMBUST CONDITION
Monitored item
Unit
Description
Remarks
ENG SPEED
rpm
• Indicates the engine speed computed 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 abnormal 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, specification
range is indicated in “SPEC”.
B/FUEL SCHDL
msec
• “Base fuel schedule” indicates the fuel injection
pulse width programmed into ECM, prior to any
learned on board correction.
• When engine is running, specification
range is indicated in “SPEC”.
A/F ALPHA-B1
%
• The mean value of the air-fuel ratio feedback cor-
rection 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 control.
• When engine is running, specification
range is indicated in “SPEC”.
A/F ALPHA-B2
ON BOARD DIAGNOSTIC (OBD) SYSTEM
EC-117
< FUNCTION DIAGNOSIS >
[VQ25DE, VQ35DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
COOLAN TEMP/S
°
C or
°
F
• The engine coolant temperature (determined by
the signal voltage of the engine coolant tempera-
ture sensor) is displayed.
• When the engine coolant temperature
sensor is open or short-circuited,
ECM enters fail-safe mode. The en-
gine coolant temperature determined
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.
A/F SEN1 (B2)
HO2S2 (B1)
V
• The signal voltage of the heated oxygen sensor 2
is displayed.
HO2S2 (B2)
HO2S2 MNTR(B1)
RICH/LEAN
• Display of heated oxygen sensor 2 signal:
RICH: means the amount of oxygen after three
way catalyst is relatively small.
LEAN: means the amount of oxygen after three
way catalyst is relatively large.
• When the engine is stopped, a certain
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 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
TP SEN 1-B1
V
• The throttle position sensor signal voltage is dis-
played.
• TP SEN 2-B1 signal is converted by
ECM internally. Thus, it differs from
ECM terminal voltage signal.
TP SEN 2-B1
INT/A TEMP SE
°
C or
°
F
• The intake air temperature (determined by the
signal voltage of the intake air temperature sen-
sor) is indicated.
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 sig-
nal.
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 condition-
er switch as determined by the air conditioner sig-
nal.
P/N POSI SW
ON/OFF
• Indicates [ON/OFF] condition from the park/neu-
tral 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) 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
compensated by ECM according to the input sig-
nals.
• When the engine is stopped, a certain
computed value is indicated.
INJ PULSE-B2
Monitored item
Unit
Description
Remarks
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