2014 NISSAN TEANA crank

EC-62
< SYSTEM DESCRIPTION >[QR25DE]
SYSTEM
EVAPORATIVE EMISSION SYSTEM : System Description
INFOID:0000000009462106
SYSTEM DIAGRAM
INPUT/OUTPUT SIGNAL CHART
*1: ECM determines the start signal status by the signals of engine speed and battery voltage.
*2: This signal is sent to the ECM through CAN communication line.
JPBIA4896GB
Sensor Input signal to ECM ECM function Actuator
Crankshaft position sensor (POS)
Camshaft position sensor (PHASE) Engine speed*
1
EVAP canister
purge flow control EVAP canister purge vol-
ume control solenoid valve
Mass air flow sensor Amount of intake air
Engine coolant temperature sensor Engine coolant temperature
Battery Battery voltage*
1
Throttle position sensor Throttle position
Accelerator pedal position sensor Accelerator pedal position
Air fuel ratio (A/F) sensor 1 Density of oxygen in exhaust gas
(Mixture ratio fe edback signal)
Fuel tank temperature sensor Fuel temperature in fuel tank
EVAP control system pressure sensor Pressure in purge line
Combination meter Vehicle speed*
2
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

DIAGNOSIS SYSTEM (ECM)EC-79
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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

DIAGNOSIS SYSTEM (ECM)EC-85
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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-90
< ECU DIAGNOSIS INFORMATION >[QR25DE]
ECM
VIAS S/V-1• Engine: After warming up
• Selector lever: P or N
• Air conditioner switch: OFF
•No load When revving engine up to 5,000 rpm
quickly Off
→ On → Off
AIR COND RLY • Engine: After warming up, idle the
engine Air conditioner switch: OFF Off
Air conditioner switch: ON
(Compressor operates) On
FUEL PUMP RLY • For 1 second after turning ignition switch: ON
• Engine running or cranking On
• Except above Off
VENT CONT/V • Ignition switch: ON Off
THRTL RELAY • Ignition switch: ON On
COOLING FAN • Engine: After warming up, idle the
engine
• Air conditioner switch: OFF Engine coolant temperature is 97
°C
(207 °F) or less Off
Engine coolant temperature between
98 °C (208 °F) and 99 °C (210 °F) or more Low
Engine coolant temperature between
100 °C (212 °F) or more Hi
• Engine: After warming up, idle the engine
• Air conditioner switch: ON
• Refrigerant pressure is less than 1,280 kPa (12.80 bar, 13.05 kg/
cm
2, 185.6 psi) Engine coolant temperature is 97
°C
(207 °F) or less Off
Engine coolant temperature between
98 °C (208 °F) and 99 °C (210 °F) or more Mid
Engine coolant temperature between
100 °C (212 °F) or more Hi
HO2S2 HTR (B1) • Engine speed: Below 3,600 rpm after the following conditions are met.
- Engine: After warming up
- Keeping the engine speed between 3,500 and 4,000 rpm for 1 minute and at
idle for 1 minute under no load On
• Engine speed: Above 3,600 rpm Off
ALT DUTY SIG • Power generation voltage variable control: Operating On
• Power generation voltage variable control: Not operating Off
I/P PULLY SPD • Vehicle speed: More than 20 km/h (12 MPH) Almost the same speed as
the tachometer indication
VEHICLE SPEED • Turn drive wheels and compare CONSULT value with the speedometer indi-
cation. Almost the same speed as
the speedometer indication
IDL A/V LEARN • Engine: running Idle air volume learning has not been per-
formed yet. YET
Idle air volume learning has already been
performed successfully. CMPLT
TRVL AFTER MIL • Ignition switch: ON Vehicle has traveled after MIL has turned
ON. 0 - 65,535 km
(0 - 40,723 miles)
ENG OIL TEMP • Engine: After warming up More than 70 °C (158 °F)
A/F S1 HTR(B1) • Engine: After warming up, idle the engine
(More than 140 seconds after starting engine.) 4 - 100%
VHCL SPEED SE • Turn drive wheels and compare CONSULT value with the speedometer indi-
cation. Almost the same speed as
the speedometer indication
SET VHCL SPD • Engine: Running ASCD: Operating The preset vehicle speed is
displayed
MAIN SW • Ignition switch: ON MAIN switch: Pressed On
MAIN switch: Released Off
Monitor Item Condition Values/Status
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

EC-98
< ECU DIAGNOSIS INFORMATION >[QR25DE]
ECM
61
(W) 62
(R) Battery temperature sen-
sor Input[Engine is running]
• Battery temperature: 25 °C ( °F)
• Idle speed 3.3 V
62
(R) —Sensor ground
(Battery curre nt sensor,
battery temperature sen-
sor) —— —
63
(G) 62
(R) Battery current sensor Input [Engine is running]
• Battery: Fully charged
*2
• Idle speed 2.6 - 3.5 V
64
(O) —Sensor power supply
(Battery curre nt sensor) — [Ignition switch: ON] 5.0 V
70
(SB) —Sensor ground
[Crankshaft position sen-
sor (POS)] —— —
71
(LG) 70
(SB) Crankshaft position sen-
sor (POS) Input[Engine is running]
• Warm-up condition
• Idle speed NOTE:
The pulse cycle changes depending
on rpm at idle 4.0 V
[Engine is running]
• Engine speed: 2,000 rpm 4.0 V
72
(V) —Sensor power supply
[Crankshaft position sen-
sor (POS)] — [Ignition switch: ON] 5.0 V
73
(B) —Shield — — —
77
(R) 78
(B) Throttle position sensor 2 Input [Ignition switch: ON]
• Engine stopped
• Selector lever: D
• Accelerator pedal: Fully released Less than 4.75 V
[Ignition switch: ON]
• Engine stopped
• Selector lever: D
• Accelerator pedal: Fully depressed More than 0.36 V
78
(B) —Sensor ground
(Throttle position sensor
1, 2) —— —
Te r m i n a l N o .
(Wire color) Description
ConditionVa l u e
(Approx.)
+ − Signal name Input/
Output
JPBIA4728ZZ
JPBIA4729ZZ
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

EC-104
< ECU DIAGNOSIS INFORMATION >[QR25DE]
ECM
DTC Inspection Priority Chart
INFOID:0000000009462123
If some DTCs are displayed at the same time, perfo rm inspections one by one based on the following priority
chart.
Priority DTC Detected items
1 U0101, U1001 CAN communication line
P0101, P0102, P0103 Mass air flow sensor
P010A Manifold absolute pressure sensor
P0111, P0112, P0113, P0127 Intake air temperature sensor
P0116, P0117, P0118, P0125 Engine coolant temperature sensor
P0122, P0123, P0222, P0223, P1225, P1226, P2135 Throttle position sensor
P0128 Thermostat function
P0181, P0182, P0183 Fuel tank temperature sensor
P0196, P0197, P0198 Engine oil temperature sensor
P0327, P0328 Knock sensor
P0335 Crankshaft position sensor (POS)
P0340 Camshaft position sensor (PHASE)
P0460, P0461, P0462, P0463 Fuel level sensor
P0500 Vehicle speed sensor
P0520 Engine oil pressure sensor
P0603, P0604, P0605, P0606, P0607, P060A, P060B,
P2610 ECM
P0643 Sensor power supply
P0850 Transmission range switch
P1078 Exhaust valve timing control position sensor
P1550, P1551, P1552, P1553, P1554 Battery current sensor
P1556, P1557 Battery temperature sensor
P1610, P1611, P1612, P1615 NATS
P2014, P2016, P2017, P2018 Intake manifold runner control valve position sensor
P2122, P2123, P2127, P2128, P2138 Accelerator pedal position sensor
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

BASIC INSPECTIONEC-171
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2. Rev engine (2,000 to 3,000 rpm) two or three times under no
load, then run engine at idle speed for about 1 minute.
3. Check idle speed.
For procedure, refer to EC-534, "Inspection"
.
For specification, refer to EC-541, "Idle Speed"
.
Is the inspection result normal?
YES >> GO TO 10.
NO >> GO TO 4.
4.PERFORM ACCELERATOR PEDAL RE LEASED POSITION LEARNING
1. Stop engine.
2. Perform EC-177, "Work Procedure"
.
>> GO TO 5.
5.PERFORM THROTTLE VALVE CL OSED POSITION LEARNING
Perform EC-178, "Work Procedure"
.
>> GO TO 6.
6.PERFORM IDLE AIR VOLUME LEARNING
Perform EC-179, "Work Procedure"
.
Is Idle Air Volume Learning carried out successfully?
YES >> GO TO 7.
NO >> Follow the instruction of Idle Air Volume Learning. Then GO TO 4.
7.CHECK TARGET IDLE SPEED AGAIN
1. Start engine and warm it up to normal operating temperature.
2. Check idle speed.
For procedure, refer to EC-534, "Inspection"
.
For specification, refer to EC-541, "Idle Speed"
.
Is the inspection result normal?
YES >> GO TO 10.
NO >> GO TO 8.
8.DETECT MALFUNCTIONING PART
Check the Following.
• Check camshaft position sensor (PHASE) and circuit. Refer to EC-329, "DTC Logic"
.
• Check crankshaft position sensor (POS) and circuit. Refer to EC-326, "DTC Logic"
.
Is the inspection result normal?
YES >> GO TO 9.
NO >> Repair or replace. Then GO TO 4
9.CHECK ECM FUNCTION
1. Substitute another known-good ECM to check ECM f unction. (ECM may be the cause of an incident, but
this is a rare case.)
2. Perform initialization of NVIS (NATS) system and regi stration of all NVIS (NATS) ignition key IDs. Refer to
SEC-66, "ECM : Work Procedure"
.
>> GO TO 4.
10.CHECK IGNITION TIMING
1. Run engine at idle.
PBIA8513J
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

BASIC INSPECTIONEC-173
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17.DETECT MALFUNCTIONING PART
Check the following.
• Check camshaft position sensor (PHASE) and circuit. Refer to EC-329, "DTC Logic"
.
• Check crankshaft position sensor (POS) and circuit. Refer to EC-326, "DTC Logic"
.
Is the inspection result normal?
YES >> GO TO 18.
NO >> Repair or replace. Then GO TO 4
18.CHECK ECM FUNCTION
1. Substitute another known-good ECM to check ECM f unction. (ECM may be the cause of an incident, but
this is a rare case.)
2. Perform initialization of NVIS (NATS) system and regi stration of all NVIS (NATS) ignition key IDs. Refer to
SEC-66, "ECM : Work Procedure"
.
>> GO TO 4.
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM