2014 NISSAN TEANA ECU

DIAGNOSIS SYSTEM (ECM)EC-599
< SYSTEM DESCRIPTION > [VQ35DE]
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This function allows to read if ECM has completed
the self-diagnoses of major emission control systems and
components. For SRT, refer to EC-596, "DIAGNOSIS DESCRIPTION : System Readiness Test (SRT) Code"
.
Operation Procedure
1. Turn ignition switch ON and wait 20 seconds.
2. SRT status is indicated as shown blow. • ECM continues to illuminate MIL if all SRT codes are set.
• ECM blinks MIL for about 10 seconds if all SRT codes are not set.
MALFUNCTION WARNING MODE
Description
In this function ECM turns on or blinks MIL when it detects a malfunction in the emission control system com-
ponents and/or the powertrain control components (which affe ct vehicle emissions) to inform the driver that a
malfunction has been detected.
Operation Procedure
1. Turn ignition switch ON.
2. Check that MIL illuminates. If it remains OFF, check MIL circuit. Refer to EC-973, "Diagnosis Procedure"
.
3. Start engine and let it idle. • For two trip detection logic diagnoses, ECM turns on MIL when it detects the same malfunction twice in
the two consecutive driving cycles.
• For 1st trip detection logic diagnoses, ECM turns on MIL when it detects a malfunction in one driving
cycle.
• ECM blinks MIL when it detects a malfunction t hat may damage the three way catalyst (misfire).
SELF-DIAGNOSTIC RESULTS MODE
Description
This function allows to indicate DTCs or 1st trip DTCs stored in ECM according to the number of times MIL is
blinking.
How to Set Self-diagnostic Results Mode
NOTE:
• It is better to count the time accurately with a clock.
• It is impossible to switch the diagnostic mode when an accelerator pedal position sensor circuit has a mal- function.
• After ignition switch is turned off, ECM is a lways released from the “self-diagnostic results” mode.
1. Confirm that accelerator pedal is fully releas ed, turn ignition switch ON and wait 3 seconds.
2. Repeat the following procedure quick ly five times within 5 seconds.
• Fully depress the accelerator pedal.
• Fully release the accelerator pedal.
JMBIA1515GB
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

DIAGNOSIS SYSTEM (ECM)EC-601
< SYSTEM DESCRIPTION > [VQ35DE]
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The length of time the 1,000th-digit numeral flashes on
and off is 1.2 seconds consisting of an ON (0.6-sec-
onds) - OFF (0.6-seconds) cycle.
The 100th-digit numeral and lower digit numerals consis t of a 0.3-seconds ON and 0.3-seconds OFF cycle.
A change from one digit numeral to another occurs at an inte rval of 1.0-second OFF. In other words, the later
numeral appears on the display 1.3 seconds after the former numeral has disappeared.
A change from one trouble code to another occurs at an interval of 1.8-seconds OFF.
In this way, all the detected malfunctions are classi fied by their DTC numbers. The DTC 0000 refers to no mal-
function. Refer to EC-630, "DTC Index"
.
How to Erase Self-diagnostic Results
By performing this procedure, ECM memory is erased and the following diagnostic information is erased as
well.
• Diagnostic trouble codes
• 1st trip diagnostic trouble codes
• Freeze frame data
• 1st trip freeze frame data
• System readiness test (SRT) codes
• Test values
NOTE:
Also, if a battery terminal is disconnected, ECM memory is erased and the diagnostic information as listed
above is erased. (The amount of time required for eras ing may vary from a few seconds to several hours.)
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
4. Turn ignition switch ON.
5. Set ECM in “self-diagnostic results” mode.
6. The diagnostic information has been erased from the backup memory in the ECM. Fully depress the accelerator pedal and keep it depressed for more than 10 seconds.
7. Fully release the accelerator pedal, and confirm the DTC 0000 is displayed.
CONSULT FunctionINFOID:0000000009462541
FUNCTION
*: The following emission-related diagnostic information is cleared when the ECM memory is erased.
• Diagnostic trouble codes
• 1st trip diagnostic trouble codes
• Freeze frame data
• 1st trip freeze frame data
• System readiness test (SRT) codes
• Test values
SELF DIAGNOSTIC RESULT MODE
Self Diagnostic Item
Regarding items of DTC and 1st trip DTC, refer to EC-630, "DTC Index".
How to Read DTC and 1st Trip DTC
Diagnostic test mode Function
Self Diagnostic Result Self-diagnostic results such as 1st trip DTC, DTCs and 1st trip freeze frame data or freeze frame data
can be read and erased quickly.
*
Data Monitor Input/Output data in the ECM can be read.
Work support This mode enables a technician to adjust some devices faster and more accurately by following the in-
dications on the CONSULT unit.
Active Test Diagnostic Test Mode in which CONSULT drives some actuators apart from the ECMs and also shifts
some parameters in a specified range.
ECU Identification ECM part number can be read.
DTC Work Support The status of system monitoring tests and the self-diagnosis status/results can be confirmed.
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DIAGNOSIS SYSTEM (ECM)EC-603
< SYSTEM DESCRIPTION > [VQ35DE]
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×
: 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 ×דBase 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
COOLAN 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.
A/F SEN1 (B2)
××
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
××
FUEL T/TMP SE °C or °F The fuel temperature (determined by
the signal voltage of the fuel tank
temperature sensor) is displayed.
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EC-604
< SYSTEM DESCRIPTION >[VQ35DE]
DIAGNOSIS SYSTEM (ECM)
EVAP SYS PRES VThe 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.
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.
Monitored item Unit
Monitor Item Selec-
tion
Description Remarks
ECU IN-
PUT SIG- NALS MAIN-
SIG-
NALS
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

DIAGNOSIS SYSTEM (ECM)EC-605
< SYSTEM DESCRIPTION > [VQ35DE]
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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.
VIAS S/V-2 On/Off The control condition of the VIAS
control solenoid valve 2 (determined
by ECM according to the input sig-
nals) is indicated.
• On: VIAS control solenoid valve 2
is operating.
• Off: VIAS control solenoid valve 2 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(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 be-
comes larger as the value increas-
es.
A/F S1 HTR(B2) Monitored item Unit
Monitor Item Selec-
tion
Description Remarks
ECU IN-
PUT SIG- NALS MAIN-
SIG-
NALS
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EC-606
< SYSTEM DESCRIPTION >[VQ35DE]
DIAGNOSIS SYSTEM (ECM)
COOLING FANHI/MID/
LOW/OFF • The control condition of the cool-
ing fan (determined by ECM ac-
cording to the input signals) is
indicated.
HI: High speed operation
MID: Middle speed operation
LOW: Low speed operation
OFF: Stop
HO2S2 HTR (B1)
On/Off Indicates [On/Off] condition of heat-
ed oxygen sensor 2 heater deter-
mined by ECM according to the
input signals.
HO2S2 HTR (B2)
ALT DUTY SIG On/Off The control condition of the power
generation voltage variable control
(determined by ECM according to
the input signals) is indicated.
• On: Power generation voltage variable control is active.
• Off: Power generation voltage
variable control is inactive.
I/P PULLY SPD rpm Indicates the engine speed comput-
ed from the input speed sensor sig-
nal.
VEHICLE SPEED km/h or
mph The vehicle speed computed from
the vehicle speed signal sent from
TCM is displayed.
IDL A/V LEARN YET/
CMPLT Displays the condition of idle air vol-
ume learning
• Yet: Idle Air Volume Learning has not been performed yet.
• Cmplt: Idle Air Volume Learning
has already been performed suc-
cessfully.
TRVL AFTER MIL km or
mile Distance traveled while MIL is acti-
vated.
ENG OIL TEMP °C or °F The engine oil temperature (deter-
mined by the signal voltage of the
engine oil temperature sensor) is
displayed.
VHCL SPEED SE km/h or
mph The vehicle speed computed from
the vehicle speed signal sent from
combination meter is displayed.
SET VHCL SPD km/h or
mph • The preset vehicle speed is dis-
played.
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/ACCELERATE switch sig-
nal.
SET SW On/Off Indicates [On/Off] condition from
SET/COAST switch signal.
Monitored item Unit
Monitor Item Selec-
tion
Description Remarks
ECU IN-
PUT SIG- NALS MAIN-
SIG-
NALS
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DIAGNOSIS SYSTEM (ECM)EC-607
< SYSTEM DESCRIPTION > [VQ35DE]
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BRAKE SW1 On/Off
Indicates [On/Off] condition from
brake pedal position switch signal or
ASCD clutch switch.
BRAKE SW2 On/Off Indicates [On/Off] condition of stop
lamp switch signal.
VHCL SPD CUT Non/
Cut • Indicates the vehicle cruise condi-
tion.
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
operation is cut off.
LO SPEED CUT Non/
Cut • Indicates the vehicle cruise condi-
tion.
NON: Vehicle speed is maintained
at the ASCD set speed.
CUT: Vehicle speed decreased to
excessively low, and ASCD oper-
ation is cut off.
AT OD MONITOR On/Off • Indicates [On/Off] condition of
CVT O/D according to the input
signal from the TCM.
AT OD CANCEL On/Off • Indicates [On/Off] condition of
CVT O/D cancel request signal.
CRUISE LAMP On/Off Indicates [On/Off] condition of
CRUISE lamp dete rmined by the
ECM according to the input signals.
SET LAMP On/Off • Indicates [On/Off] condition of
SET lamp determined by the ECM
according to the input signals.
ALT DUTY % Indicates the duty ratio of the power
generation command value. The ra-
tio is calculated by ECM based on
the battery current sensor signal.
BAT CUR SEN mV The signal voltage of battery current
sensor is displayed.
A/F ADJ-B1
— Indicates the correction of a factor
stored in ECM. The factor is calcu-
lated from the difference between
the target air-fuel ratio stored in ECM
and the air-fuel ratio calculated from
A/F sensor 1 signal.
A/F ADJ-B2
P/N POSI SW On/Off ××Indicates [On/Off] condition from the
park/neutral position (PNP) signal.
INT/A TEMP SE °C or °F ×× The intake air temperature (deter-
mined by the signal voltage of the in-
take air temperature sensor) is
indicated.
AC PRESS SEN V The signal voltage from the refriger-
ant pressure sensor is displayed.
VTC DTY EX B2
*——
Monitored item Unit
Monitor Item Selec-
tion
Description Remarks
ECU IN-
PUT SIG- NALS MAIN-
SIG-
NALS
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

EC-608
< SYSTEM DESCRIPTION >[VQ35DE]
DIAGNOSIS SYSTEM (ECM)
EVAP LEAK DIAGYe t / C m -
plt Indicates the condition of EVAP leak
diagnosis.
• YET: EVAP leak diagnosis has not been performed yet.
• CMPLT: EVAP leak diagnosis has
been performed successfully.
EVAP DIAG READY On/Off Indicates the ready condition of
EVAP leak diagnosis.
• On: Diagnosis has been ready
condition.
• Off: Diagnosis has not been ready condition.
BAT TEMP SEN V The signal voltage from the battery
temperature sensor is displayed.
THRTL STK CNT B1
*——
HO2 S2 DIAG1(B2) INCMP/
CMPLT Indicates DTC P0139 self-diagnosis
(delayed responce) condition.
• INCMP: Self-diagnosis is incom- plete.
• CMPLT: Self-diagnosis is com-
plete.
A/F SEN1 DIAG1(B2) INCMP/
CMPLT Indicates DTC P015C or P015D
self-diagnosis condition.
• INCMP: Self-diagnosis is incom-
plete.
• CMPLT: Self-diagnosis is com- plete.
A/F SEN1 DIAG1(B1) INCMP/
CMPLT Indicates DTC P015A or P015B self-
diagnosis condition.
• INCMP: Self-diagnosis is incom- plete.
• CMPLT: Self-diagnosis is com- plete.
A/F SEN1 DIAG2(B2) INCMP/
CMPLT Indicates DTC P014E or P014F self-
diagnosis condition.
• INCMP: Self-diagnosis is incom-
plete.
• CMPLT: Self-diagnosis is com- plete.
A/F SEN1 DIAG2(B1) INCMP/
CMPLT Indicates DTC P014C or P014D
self-diagnosis condition.
• INCMP: Self-diagnosis is incom- plete.
• CMPLT: Self-diagnosis is com- plete.
A/F SEN1 DIAG3(B2) ABSNT/
PRSNT Indicates DTC P014C, P014D,
P015A or P015B se lf-diagnosis con-
dition.
• ABSNT: The vehicle condition is not within the diagnosis range.
• PRSNT: The vehicle condition is within the diagnosis range.
Monitored item Unit
Monitor Item Selec-
tion
Description Remarks
ECU IN-
PUT SIG- NALS MAIN-
SIG-
NALS
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM