2014 NISSAN TEANA engine

EC-78
< SYSTEM DESCRIPTION >[QR25DE]
DIAGNOSIS SYSTEM (ECM)
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) applica- ble to this vehicle, refer to CONSULT display items.
• For reference values of the following items, refer to EC-88, "Reference Value"
.
Monitored Item
Freeze frame data item* Description
DIAG TROUBLE CODE
[PXXXX] • The engine control compon
ent part/control system has a trouble code that is displayed as PXXXX. (Re-
fer to EC-105, "DTC Index"
.)
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
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.
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.
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 o pening 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.
FUEL SYS-B2
• There items are displayed but are not applicable to this model.
L-FUEL TRM-B2 [%]
S-FUEL TRM-B2 [%]
INT MANI PRES [kPa]
COMBUST CONDITION
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

DIAGNOSIS SYSTEM (ECM)EC-79
< SYSTEM DESCRIPTION > [QR25DE]
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OMonitored item Unit Monitor Item
Selection
Description Remarks
ECU
IN-
PUT
SIG-
NALS MAIN
SIG-NAL
S
ENG SPEED rpm ×ו Indicates the engine speed computed
from the signal of the crankshaft position
sensor (POS) and camshaft position sen-
sor (PHASE). • Accuracy becomes poor if en-
gine speed drops below the
idle rpm.
• If the signal is interrupted while
the engine is running, an ab-
normal value may be indicat-
ed.
MAS A/F SE-B1 V ×ו 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, spec- ification range is indicated in
“SPEC”.
B/FUEL SCHDL ms ×ו “Base fuel schedule” indicates the fuel in-
jection pulse width programmed into
ECM, prior to any learned on board cor-
rection. • When engine is running, spec-
ification range is indicated in
“SPEC”.
A/F ALPHA-B1 % • The mean value of the air-fuel ratio feed-
back correction factor per cycle is indicat-
ed. • When the engine is stopped, a
certain value is indicated.
• When engine is running, spec-
ification range is indicated in
“SPEC”.
• This data also includes the
data for the air-fuel ratio learn-
ing control.
COOLAN TEMP/S °C or °F ×× • The engine coolant temperature (deter-
mined by the signal voltage of the engine
coolant temperature sensor) is dis-
played. • When the engine coolant tem-
perature sensor is open or
short-circuited, ECM enters
fail-safe mode. The engine
coolant temperature deter-
mined by the ECM is dis-
played.
A/F SEN1 (B1) V ×ו The A/F signal computed from the input
signal of the air fuel ratio (A/F) sensor 1
is displayed.
HO2S2 (B1) V ×ו The signal voltage of the heated oxygen
sensor 2 is displayed.
HO2S2 MNTR(B1) RICH/LEAN ו Display of heated oxygen sensor 2 sig-
nal.
- 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.
VHCL SPEED SE km/h or mph ×ו The vehicle speed computed from the
vehicle speed signal sent from combina-
tion meter is displayed.
BATTERY VOLT V • The power supply voltage of ECM is dis-
played.
ACCEL SEN 1
V• The accelerator pedal position sensor
signal voltage is displayed. • ACCEL SEN 2 signal is con-
verted by ECM internally.
Thus, it differs from ECM ter-
minal voltage signal.
ACCEL SEN 2
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

EC-80
< SYSTEM DESCRIPTION >[QR25DE]
DIAGNOSIS SYSTEM (ECM)
TP SEN 1-B1
V××
• The throttle position sensor signal volt-age is displayed. • TP SEN 2-B1 signal is convert-
ed by ECM internally. Thus, it
differs from ECM terminal volt-
age signal.
TP SEN 2-B1
××
FUEL T/TMP SE °C or °F • The fuel temperature (determined by the
signal voltage of the fuel tank tempera-
ture sensor) is displayed.
EVAP SYS PRES V • The signal voltage of EVAP control sys-
tem pressure sensor is displayed.
FUEL LEVEL SE V ו 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 battery volt-
age. • After starting the engine, [OFF]
is displayed regardless of the
starter signal.
CLSD THL POS On/Off ×ו Indicates idle position [ON/OFF] comput-
ed by ECM according to the accelerator
pedal position sensor signal.
AIR COND SIG On/Off ×ו Indicates [ON/OFF] condition of the air
conditioner switch as determined by the
air conditioner signal.
PW/ST SIGNAL On/Off ×ו [ON/OFF] condition of the power steering
system (determined by the signal sent
from EPS control unit) is indicated.
LOAD SIGNAL On/Off ×ו 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 ×ו Indicates [ON/OFF] condition from igni-
tion switch signal.
HEATER FAN SW On/Off ו 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
certain computed value is indi-
cated.
IGN TIMING BTDC ו Indicates the ignition timing computed by
ECM according to the input signals. • When the engine is stopped, a
certain value is indicated.
CAL/LD VALUE % • “Calculated load value” indicates the val-
ue of the current air flow divided by peak
air flow.
MASS AIRFLOW g/s • Indicates the mass air flow computed by
ECM according to the signal voltage of
the mass air flow sensor.
Monitored item Unit
Monitor Item
Selection
Description Remarks
ECU
IN-
PUT
SIG-
NALS MAIN
SIG-
NAL S
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EC-82
< SYSTEM DESCRIPTION >[QR25DE]
DIAGNOSIS SYSTEM (ECM)
ALT DUTY SIG On/Off• The control condition of the power gener-
ation voltage variable control (deter-
mined 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 computed
from the input speed sensor signal.
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 Volume
Learning
- YET: Idle air volume learning has not been performed yet.
- CMPLT: Idle air volume learning has al-
ready been performed successfully.
TRVL AFTER MIL km or mile • Distance traveled while MIL is activated.
ENG OIL TEMP °C or °F • The engine oil temperature (determined
by the signal voltage of the engine oil
temperature sensor) is displayed.
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 becomes
larger as the value increases.
VHCL SPEED SE km/h or mph • The vehicle speed computed from the
vehicle speed signal sent from combina-
tion meter is displayed.
SET VHCL SPD km/h or mph • The preset vehicle speed is displayed.
MAIN SW On/Off • Indicates [ON/OFF] condition from MAIN
switch signal.
CANCEL SW On/Off • Indicates [ON/OFF] condition from CAN-
CEL switch signal.
RESUME/ACC SW On/Off • Indicates [ON/OFF] condition from RE-
SUME/ACCELERATE switch signal.
SET SW On/Off • Indicates [ON/OFF] condition from SET/
COAST switch signal.
BRAKE SW1 On/Off • Indicates [ON/OFF] condition from brake
pedal position switch signal.
BRAKE SW2 On/Off • Indicates [ON/OFF] condition of stop
lamp switch signal.
VHCL SPD CUT Non/Cut • Indicates the vehicle cruise condition.
- Non: Vehicle speed is maintained at the
ASCD set speed.
- Cut: Vehicle speed decreased to exces- sively low compared with the ASCD set
speed, and ASCD operation is cut off.
Monitored item Unit
Monitor Item
Selection
Description Remarks
ECU
IN-
PUT
SIG-
NALS MAIN
SIG-
NAL S
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

DIAGNOSIS SYSTEM (ECM)EC-85
< SYSTEM DESCRIPTION > [QR25DE]
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WORK SUPPORT MODE
Work Item
*: This function is not necessary in the usual service procedure.
ACTIVE TEST MODE
Test Item
Work item Condition Usage
IDLE AIR VOL LEARN • The idle air volume that keeps the engine within the spec- ified range is memorized in ECM. When learning the idle air volume
EVAP SYSTEM CLOSE Close the EVAP canister vent control valve in order to make
EVAP system close under the following conditions.
• Ignition switch ON
• Engine not running
• Ambient temperature is above 0 °C (32 °F).
• No vacuum and no high pressure in EVAP system
• Fuel tank temp is more than 0 °C (32 °F).
• Within 10 minutes after starting “EVAP SYSTEM CLOSE”
• When trying to execute “EVAP SYSTEM CLOSE” under the condition except above, CONSULT will discontinue it
and display appropriate instruction.
NOTE:
When starting engine, CONSULT may display “BAT-
TERY VOLTAGE IS LOW. CHARGE BATTERY”, even in
when using a charged battery. When detecting EVAP vapor leak
in the EVAP system
FUEL PRESSURE RELEASE • Fuel pump will st op by touching “START” during idling.
Crank a few times after engine stalls. When releasing fuel pressure from
fuel line
TARGET IGN TIM ADJ* • Idle condition When adjusting target ignition tim- ing
TARGET IDLE RPM ADJ* • Idle condition When setting target idle speed
VIN REGISTRATION • In this mode , VIN is registered in ECM. When registering VIN in ECM
SELF-LEARNING CONT • The coefficient of self-learning control mixture ratio returns to the original coefficient. When clearing mixture ratio self-
learning value
CLSD THL POS LEARN • Ignition on and engine stopped. When learning the throttle valve
closed position
SAVING DATA FOR REPLC CPU In th is mode, save data that is in ECM. When ECM is replaced.
WRITING DATA FOR REPLC CPU In this mode, write data stored by “SAVE DATA FOR CPU
REPLC” in work support mode to ECM. When ECM is replaced.
Test item Condition Judgment Check item (Remedy)
FUEL INJECTION • Engine: Return to the original
trouble condition
• Change the amount of fuel injec- tion using CONSULT. If trouble symptom disappears, see
CHECK ITEM. • Harness and connectors
• Fuel injector
• Air fuel ratio (A/F) sensor 1
ENG COOLANT
TEMP • Engine: Return to the original
trouble condition
• Change the engine coolant tem- perature using CONSULT. If trouble symptom disappears, see
CHECK ITEM. • Harness and connectors
• Engine coolant temperature
sensor
• Fuel injector
PURG VOL CONT/V • Engine: After warming up, run en-
gine at 1,500 rpm.
• Change the EVAP canister purge volume control solenoid valve
opening percent using CON-
SULT. Engine speed changes according
to the opening percent. • Harness and connectors
• Solenoid valve
FUEL/T TEMP SEN • Change the fuel tank temperature using CONSULT.
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

EC-86
< SYSTEM DESCRIPTION >[QR25DE]
DIAGNOSIS SYSTEM (ECM)
*: Leaving cooling fan OFF with CONSULT while engine is running may cause the engine to overheat.
DTC WORK SUPPORT MODE
DTC WORK SUPPORT Mode
ALTERNATOR
DUTY • Engine: Idle
• Change duty ratio using CON-
SULT. Battery voltage changes.
• Harness and connectors
•IPDM E/R
•Alternator
FUEL PUMP RELAY • Ignition switch: ON (Engine
stopped)
• Turn the fuel pump relay “ON”
and “OFF” using CONSULT and
listen to operating sound. Fuel pump relay makes the operat-
ing sound. • Harness and connectors
• Fuel pump relay
VIAS S/V-1 • Ignition switch: ON
• Turn intake manifold tuning valve
“ON” and “OFF” using CONSULT
and listen to operating sound. Intake manifold tuning valve motor
makes an operating sound. • Harness and connectors
• Intake manifold tuning valve mo- tor
TUMBLE CONTROL
VA LV E • Ignition switch: ON
• Turn intake manifold runner con-
trol valve “ON” and “OFF” using
CONSULT and listen to operating
sound. Intake Manifold Runner control
valve motor makes an operating
sound. • Harness and connectors
• Intake Manifold Runner control valve motor
IGNITION TIMING • Engine: Return to the original
trouble condition
• Timing light: Set
• Retard the ignition timing using
CONSULT. If trouble symptom disappears, see
CHECK ITEM. • Perform Idle Air Volume Learn-
ing.
POWER BALANCE • Engine: After warming up, idle the
engine.
• A/C switch OFF
• Selector lever: P or N
• Cut off each fuel injector signal one at a time using CONSULT. Engine runs rough or stops. • Harness and connectors
• Compression
• Fuel injector
• Power transistor
• Spark plug
• Ignition coil
VENT CONTROL/V • Ignition switch: ON (Engine
stopped)
• Turn solenoid valve “ON” and “OFF” using CONSULT and listen
to operating sound. Solenoid valve makes an operating
sound. • Harness and connectors
• Solenoid valve
INT V/T ASSIGN AN-
GLE • Engine: Return to the original
trouble condition
• Change intake valve timing using
CONSULT. If trouble symptom disappears, see
CHECK ITEM. • Harness and connectors
• Intake valve timing control sole- noid valve
EXH V/T ASSIGN
ANGLE • Engine: Return to the original
trouble condition
• Change exhaust valve timing us- ing CONSULT. If trouble symptom disappears, see
CHECK ITEM. • Harness and connectors
• Exhaust valve timing control so-
lenoid valve
COOLING FAN* • Ignition switch: ON
• Turn the cooling fan “LOW”, “HI” and “OFF” using CONSULT. Cooling fan moves and stops. • Harness and connectors
• IPDM E/R (Cooling fan relay)
• Cooling fan motor
Test item Condition Judgment Check item (Remedy)
Test mode Test item Corresponding DTC No. Reference page
EVAPORATIVE SYSTEM PURG FLOW P0441 P0441
EC-337
PURG VOL CN/V P1444 P0443EC-342
A/F SEN1 A/F SEN1(B1) P1276 P0130 EC-258
HO2S2HO2S2(B1) P1146 P0138
EC-274HO2S2(B1) P1147 P0137EC-268
HO2S2(B1) P0139 P0139EC-282
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EC-88
< ECU DIAGNOSIS INFORMATION >[QR25DE]
ECM
ECU DIAGNOSIS INFORMATION
ECM
Reference ValueINFOID:0000000009462121
VALUES ON THE DIAGNOSIS TOOL
NOTE:
• The following table includes information (items) inapplicable to this vehicle. For information (items) applica- ble to this vehicle, refer to CONSULT display items.
• Numerical values in the following table are reference values.
• These values are input/output values that ECM receiv es/transmits and may differ from actual operations.
Example: The ignition timing shown by the timing light may differ from the ignition timing displayed on the
data monitor.
This occurs because the timing light shows a value calculated by ECM according to signals received from
the camshaft position sensor and other sensors related to ignition timing.
• For outlines of following items, refer to EC-77, "CONSULT Function"
.
Monitor Item Condition Values/Status
ENG SPEED • Run engine and compare CONSULT value with the tachometer indication.Almost the same speed as
the tachometer indication.
MAS A/F SE-B1 See EC-196, "Diagnosis Procedure"
.
B/FUEL SCHDL See EC-196, "Diagnosis Procedure"
.
A/F ALPHA-B1 See EC-196, "Diagnosis Procedure"
.
COOLAN TEMP/S • Engine: After warming up More than 70 °C (158 °F)
A/F SEN1 (B1) • Engine: After warming up Maintaining engine speed at 2,000 rpm Fluctuates around 2.2 V
HO2S2 (B1) • Revving engine from idle up to 3,000 rpm quickly after the following conditions
are met.
- Engine: After warming up
- After keeping engine speed between 3,500 and 4,000 rpm for 1 minute and at idle for 1 minute under no load 0 - 0.3 V
←→ Approx. 0.6 -
1.0 V
HO2S2 MNTR(B1) • Revving engine from idle up to 3,000 rpm quickly after the following conditions
are met.
- Engine: After warming up
- After keeping engine speed between 3,500 and 4,000 rpm for 1 minute and at
idle for 1 minute under no load LEAN
←→ RICH
VHCL SPEED SE • Turn drive wheels and compare CONSULT value with the speedometer indi-
cation. Almost the same speed as
speedometer indication
BATTERY VOLT • Ignition switch: ON (Engine stopped) 11 - 14 V
ACCEL SEN 1 • Ignition switch: ON
(Engine stopped) Accelerator pedal: Fully released 0.5 - 1.0 V
Accelerator pedal: Fully depressed 4.2 - 4.8 V
ACCEL SEN 2*
1• Ignition switch: ON (Engine stopped) Accelerator pedal: Fully released 0.5 - 1.0 V
Accelerator pedal: Fully depressed 4.2 - 4.8 V
TP SEN 1-B1 • Ignition switch: ON
(Engine stopped)
• Selector lever: D Accelerator pedal: Fully re
leased More than 0.36 V
Accelerator pedal: Fully depressed Less than 4.75 V
TP SEN 2-B1*
1• Ignition switch: ON (Engine stopped)
• Selector lever: D Accelerator pedal: Fully released Less than 4.75 V
Accelerator pedal: Fully depressed More than 0.36 V
FUEL T/TMP SE • Ignition switch: ON Indicates fuel tank tempera-
ture
EVAP SYS PRES • Ignition switch: ON Approx. 1.8 - 4.8 V
FUEL LEVEL SE • Ignition switch: ON Depending on fuel level of
fuel tank
START SIGNAL • Ignition switch: ON → START → ON Off → On → Off
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

ECM
EC-89
< ECU DIAGNOSIS INFORMATION > [QR25DE]
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CLSD THL POS
• Ignition switch: ON
(Engine stopped) Accelerator pedal: Fully released On
Accelerator pedal: Slightly depressed Off
AIR COND SIG • Engine: After warming up, idle the
engine Air conditioner switch: OFF Off
Air conditioner switch: ON
(Compressor operates.) On
PW/ST SIGNAL • Engine: After warming up, idle the
engine Steering wheel: Not being turned Off
Steering wheel: Being turned On
LOAD SIGNAL • Ignition switch: ON Rear window defogger switch: ON
and/or Lighting switch: 2nd position On
Rear window defogger switch and lighting
switch: OFF Off
IGNITION SW • Ignition switch: ON → OFF → ON On → Off → On
HEATER FAN SW • Engine: After warming up, idle the
engine Heater fan switch: ON On
Heater fan switch: OFF Off
BRAKE SW • Ignition switch: ON Brake pedal: Fully released Off
Brake pedal: Slightly depressed On
INJ PULSE-B1 • Engine: After warming up
• Selector lever: P or N
• Air conditioner switch: OFF
•No load Idle 2.0 - 3.0 msec
2,000 rpm 1.9 - 2.9 msec
IGN TIMING • Engine: After warming up
• Selector lever: P or N
• Air conditioner switch: OFF
•No load Idle 5
° - 15 ° BTDC
2,000 rpm 25 ° - 45 ° BTDC
CAL/LD VALUE • Engine: After warming up
• Selector lever: P or N
• Air conditioner switch: OFF
•No load Idle 10% - 35%
2,500 rpm 10% - 35%
MASS AIRFLOW • Engine: After warming up
• Selector lever: P or N
• Air conditioner switch: OFF
•No load Idle 1.0 - 4.0 g/s
2,500 rpm 4.0 - 10.0 g/s
PURG VOL C/V • Engine: After warming up
• Selector lever: P or N
• Air conditioner switch: OFF
•No load Idle
(Accelerator pedal: Not depressed even
slightly, after engine starting.) 0%
2,000 rpm 20% - 90%
INT/V TIM(B1) • Engine: After warming up
• Selector lever: P or N
• Air conditioner switch: OFF
•No load Idle
−5 ° - 5 °CA
4,000 rpm Approx. 0 ° - 30 °CA
EXH/V TIM B1 • Engine: After warming up
• Selector lever: P or N
• Air conditioner switch: OFF
•No load Idle
−5 ° - 5 °CA
2,000 rpm Approx. 0 ° - 40 °CA
INT/V SOL (B1) • Engine: Idle speed
• Selector lever: P or N
• Air conditioner switch: OFF
•No load After warming up 0%
Cold condition [Engine coolant tempera-
ture below 60 °C (140 °F)] Approx. 50% - 100%
SWRL CONT S/V • Ignition switch: ON
• Engine coolant temperature: Be- tween -12 °C (10 °F) and 59 °C
(138 °F) Accelerator pedal: Fully released On
Accelerator pedal: Fully depressed Off
Monitor Item Condition Values/Status
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