2014 NISSAN TEANA lock

EC-52
< SYSTEM DESCRIPTION >[QR25DE]
SYSTEM
When starting the engine by cold start, ECM judges the
locked/unlocked state when ignition switch is turned
ON. When judged as locked state (fixed at the intermedi ate phase), the intake valve timing intermediate lock
control solenoid valve is activated. Since oil pre ssure does not act on the lock key even when the engine is
started, the cam phase is fixed at the intermediate phas e and the intake valve timing control is not performed.
When the engine stops without locking the cam phase at the intermediate phase due to an engine stall and the
state is not judged as locked, the intake valve timing intermediate lock control solenoid valve and the intake
valve timing control solenoid valve are activated and the cam phase shifts to the advanced position to be
locked at the intermediate phase. Even when not locked in the intermediate lock phase due to no oil pressure
or low oil pressure, a ratchet structure of the camshaft sprocket (INT) rotor allows the conversion to the inter-
mediate phase in stages by engine vibration.
When engine coolant temperature is more than 60 °C, the intake valve timing is controlled by deactivating the
intake valve timing intermediate lock control so lenoid valve and releasing the intermediate phase lock.
When the engine is started after warming up, ECM releas es the intermediate phase lock immediately after the
engine start and controls the intake valve timing.
EXHAUST VALVE TIMING CONTROL
EXHAUST VALVE TIMING CONT ROL : System DescriptionINFOID:0000000009462097
SYSTEM DIAGRAM
INPUT/OUTPUT SIGNAL CHART
JPBIA4761GB
Sensor Input signal to ECM ECM function Actuator
Crankshaft position sensor (POS) Engine speed and piston position
Exhaust valve
timing control Exhaust valve timing control
solenoid valve
Camshaft position sensor (PHASE)
Engine oil temperature sensor Engine oil temperature
Exhaust valve timing control position
sensor Exhaust valve timing signal
Combination meter CAN commu-
nication Vehicle speed signal
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

DIAGNOSIS SYSTEM (ECM)EC-75
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• 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-517, "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.
3. Wait 7 seconds, fully depress the accelerator pedal and keep it depressed for approx. 10 seconds until the
MIL starts blinking.
NOTE:
Do not release the accelerator pedal for 10 seconds if MIL starts blinking during this period. This blinking
is displaying SRT status and is continued for another 10 seconds.
4. Fully release the accelerator pedal. ECM has entered to “Self-diagnostic results” mode.
JMBIA1515GB
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

ECM
EC-97
< ECU DIAGNOSIS INFORMATION > [QR25DE]
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O50
(L) 128
(GR) Intake manifold runner
control valve motor power
supply Input [Ignition switch: ON]
Battery voltage
(11 - 14 V)
51
(B) 128
(GR) Intake manifold runner
control valve motor
(Open) Output[Ignition switch ON]
• Engine coolant temperature: Be- tween -12 °C (10 °F) and 59 °C
(138 °F)
• Accelerator pedal: Fully released →
depressed Battery voltage appears for about
1 second.
52
(B) — ECM ground — — —
53
(BR) 128
(GR) A/F sensor 1 heater Input [Engine is running]
• Warm-up condition
• Idle speed
(More than 140 seconds after start-
ing engine) 2.9 - 8.8 V
54
(Y) 128
(GR) Heated oxygen sensor 2
heater Output[Engine is running]
• Engine speed: Below 3,600 rpm af-
ter 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 10 V
[Ignition switch: ON]
• Engine stopped
[Engine is running]
• Engine speed: Above 3,600 rpm Battery voltage
(11 - 14 V)
56
(SB) 128
(GR) Intake valve timing inter-
mediate lock control sole-
noid valve Output[Engine is running]
• Warm-up condition
• Idle speed 0 V
[Engine is running]
• Cold condition [Engine coolant tem- perature: below 60 °C (140 °F)]
• Idle speed Battery voltage
(11 - 14 V)
58
*1
(L) —Sensor ground
[Manifold absolute pres-
sure (MAP) sensor] —— —
59
*1
(LG) 58
*1
(L)Manifold absolute pres-
sure (MAP) sensor Output[Engine is running]
• Warm-up condition
• Both A/C switch and blower fan switch: ON (Compressor operates) 4.6 V
Output voltage atmospheric pressure.
[Engine is running]
• Warm-up condition
• Idle speed 1.2 V
[Engine is running]
• Warm-up condition
• Engine speed: 2,000 rpm 1.5 V
60
*1
(V) —Sensor power supply
[Manifold absolute pres-
sure (MAP) sensor] — [Ignition switch: ON] 5.0 V
Terminal No.
(Wire color) Description
ConditionVa l u e
(Approx.)
+ − Signal name Input/
Output
JPBIA4732ZZ
JMBIA0325GB
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

EC-102
< ECU DIAGNOSIS INFORMATION >[QR25DE]
ECM
DTC RELATED ITEM
Description
When a DTC is detected, ECM executes a mode (in the
Fail-safe mode) applicable to the DTC. The fail-safe
mode has the preset traveling control mode (acceler ator angle variation and engine output limit) and device fix
mode.
Fail Safe Pattern
Fail Safe List
× :Applicable —: Not applicable
Detected
items Engine operating condition
in fail-safe mode Remarks Reference page
Malfunction
indicator
lamp circuit Engine speed will not rise
more than 2,500 rpm due
to the fuel cut When there is an open circuit on MIL circuit, the ECM cannot warn the
driver by lighting up MIL when there is malfunction on engine control
system.
Therefore, when electrical controlled throttle and part of ECM related
diagnoses are continuously detected as NG for 5 trips, ECM warns the
driver that engine control system malfunctions and MIL circuit is open
by means of operating fail safe function.
The fail safe function also operates when above diagnoses except MIL
circuit are detected and demands the driver to repair the malfunction. EC-517, "Compo-
nent Function
Check"
Fail safe mode Vehicle behavior
Traveling con-
trol mode Accelerator an-
gle variation
control ECM controls the accelerator pedal depression speed to make it slower than actual speed. This
causes a drop in accelerating performance and encourages the driver to repair malfunction.
NOTE:
ECM does not control the accelerator pedal releasing speed.
Engine output
control ECM reduces the engine output, according to the rise in engine speed. This reduces the vehicle
speed to encourage the driver to repair malfunction.
Device fix mode • This mode fixes the IVT control solenoid valve and the EVT control solenoid valve in the refer-
ence position.
• The intake manifold runner control valve motor is turned OFF (intake manifold runner control
valve opens).
Pattern Fail safe mode
A Traveling control mode Accelerator angle variation control
B Engine output control
C Device fix mode
DTC No. Detected items Vehicle behavior
Pattern Others
ABC
P0011 Intake valve timing control ——×ECM activates the IVT intermediate lock control solenoid
valve to bring the cam sprocket into an intermediate lock con-
dition.
P0014
P0078 Exhaust valve timing control
——× —
P0101
P0102
P0103 Mass air flow sensor circuit
××× —
P0122
P0123
P0222
P0223
P2135 Throttle position sensor
———The ECM controls the electric throttle control actuator in reg-
ulating the throttle opening in order for the idle position to be
within +10 degrees.
The ECM regulates the opening speed of the throttle valve to
be slower than the normal condition.
So, the acceleration will be poor.
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

ECM
EC-103
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OP0171
P0172 Fuel injection system
×—— —
P0197
P0198 Engine oil temperature sensor
———Exhaust valve timing control does not function.
P0300
P0301
P0302
P0303
P0304 Misfire
×—— —
P0500 Vehicle speed sensor ×—— —
P050A Cold start control ×—— —
P0524 Engine oil pressure
———• ECM illuminates oil pressure warning lamp on the combina-
tion meter.
• Engine speed will not rise more than 4,000rpm due to the fuel cut.
• Fail-safe is canceled when ignition switch OFF → ON.
P052A
P052B Intake valve timing intermedi-
ate lock control ——
× —
P0603 ECM power supply circuit — ×——
P0605 ECM — ×——
P0643 Sensor power supply ———ECM stops the electric throttle control actuator control, throttle
valve is maintained at a fixed opening (approx. 5 degrees) by
the return spring.
P1078 Exhaust valve timing control position sensor circuit ×
— × —
P1805 Brake switch
———ECM controls the electric throttle control actuator by regulat-
ing the throttle opening to a small range.
Therefore, acceleration will be poor.
Vehicle condition Driving condition
When engine is idling Normal When accelerating Poor acceleration
P2004 Intake manifold runner control valve —
×× —
P2100
P2103 Throttle contro
l motor relay
——— ECM stops the electric throttle control actuator control, throttle
valve is maintained at a fixed opening (approx. 5 degrees) by
the return spring.
P2101 Electric throttle control func- tion ——— ECM stops the electric throttle control actuator control, throttle
valve is maintained at a fixed opening (approx. 5 degrees) by
the return spring.
P2118 Throttle control motor ———ECM stops the electric throttle control actuator control, throttle
valve is maintained at a fixed opening (approx. 5 degrees) by
the return spring.
P2119 Electric thro ttle control actua-
tor —
×——
P2122
P2123
P2127
P2128
P2138 Accelerator pedal position
sensor
———The ECM controls the electric throttle control actuator in reg-
ulating the throttle opening in order for the idle position to be
within +10 degrees.
The ECM regulates the opening speed of the throttle valve to
be slower than the normal condition.
So, the acceleration will be poor.
DTC
No. Detected items Vehicle behavior
Pattern Others
ABC
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

ECM
EC-105
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DTC IndexINFOID:0000000009462124
×
:Applicable —: Not applicable
2 P0031, P0032 Air fuel ratio (A/F) sensor 1 heater
P0037, P0038 Heated oxygen sensor 2 heater
P0075 Intake valve timing control solenoid valve/Intake valve timing
intermediate lock control solenoid valve
P0078 Exhaust valve timing control solenoid valve
P0130, P0131, P0132, P014 C, P014D, P015A, P015B,
P117A, P2096, P2097 Air fuel ratio (A/F) sensor 1
P0137, P0138, P0139 Heated oxygen sensor 2
P0441 EVAP control system purge flow monitoring
P0443, P0444, P0445 EVAP canister purge volume control solenoid valve
P0447, P0448 EVAP canister vent control valve
P0451, P0452, P0453 EVAP control system pressure sensor
P1217 Engine over temperature (OVERHEAT)
P1800 Intake manifold tuning valve
P1805 Brake switch
P2004 Intake manifold runner control valve
P2100, P2103 Throttle control motor relay
P2101 Electric thrott le control function
P2118 Throttle control motor
3 P0011, P052A, P052B Intake valve timing control
P0014 Exhaust valve timing control
P0171, P0172 Fuel injection system function
P0300, P0301, P0302, P0303, P0304 Misfire
P0420 Three way catalyst function
P0456 EVAP control system
P0506, P0507 Idle speed control system
P050A, P050B, P050E Cold start control
P0524 Engine oil pressure
P1148 Closed loop control
P1212 TCS communication line
P1564 ASCD steering switch
P1572 ASCD brake switch
P1574 ASCD vehicle speed sensor
P1715 Input speed sensor
P2119 Electric throttle control actuator
Priority DTC Detected items
DTC*1
Items
(CONSULT screen terms) SRT
code Trip MIL Permanent
DTC group*4Reference page
CONSULT
GST
*2ECM*3
U0101 0101*5CAN COMM CIRCUIT — 1 ×BEC-207
U1001
1001*5CAN COMM CIRCUIT — 2 — — EC-208
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

EC-108
< ECU DIAGNOSIS INFORMATION >[QR25DE]
ECM
P060A 060A CONTROL MODULE — 1 or 2
× or — B EC-405
P060B 060B CONTROL MODULE — 1 ×BEC-406
P0643 0643 SENSOR POWER/CIRC — 1 ×BEC-407
P0850 0850 P-N POS SW/CIRCUIT — 2 ×BEC-410
P1078 1078 EXH TIM SEN/CIRC-B1 — 2 ×BEC-413
P1148 1148 CLOSED LOOP-B1 — 1 ×AEC-416
P117A 117A AIR FUEL RATIO B1 — 2 ×AEC-417
P1212 1212 TCS/CIRC — 2 — — EC-422
P1217 1217 ENG OVER TEMP — 1×BEC-423
P1225 1225 CTP LEARNING-B1 — 2 — — EC-426
P1226 1226 CTP LEARNING-B1 — 2 — —EC-427
P1550 1550 BAT CURRENT SENSOR — 2 — —EC-428
P1551 1551 BAT CURRENT SENSOR — 2 — —EC-431
P1552 1552 BAT CURRENT SENSOR — 2 — —EC-431
P1553 1553 BAT CURRENT SENSOR — 2 — —EC-434
P1554 1554 BAT CURRENT SENSOR — 2 — —EC-437
P1556 1556 BAT TMP SEN/CIRC — 2 — —EC-440
P1557 1557 BAT TMP SEN/CIRC — 2 — —EC-440
P1564 1564 ASCD SW — 1 — —EC-442
P1572 1572 ASCD BRAKE SW — 1 — —EC-445
P1574 1574 ASCD VHL SPD SEN — 1 — —EC-452
P1610 1610 LOCK MODE — 2 — —SEC-68
P1611 1611 ID DISCORD,IMMU-ECM — 2 — —SEC-69
P1612 1612 CHAIN OF ECM-IMMU — 2 — — SEC-70
P1715 1715 IN PULY SPEED — 2 — — EC-454
P1800 1800 VIAS S/V-1 — 2 — —EC-456
P1805 1805 BRAKE SW/CIRCUIT — 2 — —EC-459
P2004 2004 TUMBLE CONT/V — 2×BEC-462
P2014 2014 IN/MANIFOLD RUNNER POS SEN B1 — 2 ×BEC-465
P2016 2016 IN/MANIFOLD RUNNER POS SEN B1 — 2 ×BEC-465
P2017 2017 IN/MANIFOLD RUNNER POS SEN B1 — 2 ×BEC-465
P2018 2018 IN/MANIFOLD RUNNER POS SEN B1 — 2 ×BEC-465
P2096 2096 POST CAT FUEL TRIM SYS B1 — 2 ×AEC-468
P2097 2097 POST CAT FUEL TRIM SYS B1 — 2 ×AEC-468
P2100 2100 ETC MOT PWR-B1 — 1 ×BEC-472
P2101 2101 ETC FNCTN/CIRC-B1 — 1 ×BEC-475
P2103 2103 ETC MOT PWR — 1 ×BEC-472
P 2 11 8 2 11 8 E T C M O T- B 1 — 1 ×BEC-478
P 2 11 9 2 11 9 E T C A C T R - B 1 — 1 ×BEC-480
P2122 2122 APP SEN 1/CIRC — 1 ×BEC-482
P2123 2123 APP SEN 1/CIRC — 1 ×BEC-482
P2127 2127 APP SEN 2/CIRC — 1 ×BEC-485
DTC*1
Items
(CONSULT screen terms) SRT
code Trip MIL Permanent
DTC group*4Reference page
CONSULT
GST
*2ECM*3
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

ECM
EC-113
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VVT
SYSTEM 35H VVT Monitor (Bank1)
P0011 80H 9DH
VTC intake function diagnosis (VTC
alignment check diagnosis)
P0014 81H 9DH VTC exhaust function diagnosis (VTC
alignment check diagnosis)
P0011 82H 9DH VTC intake function diagnosis (VTC
drive failure diagnosis)
P0014 83H 9DH VTC exhaust function diagnosis (VTC
drive failure diagnosis)
P100A 84H 10H VEL slow response diagnosis P1090 85H 10H VEL servo system diagnosis
P0011 86H 9DH VTC intake intermediate lock function
diagnosis (VTC intermediate position
alignment check diagnosis)
Advanced: P052A Retarded: P052B 87H 9DHVTC intake intermediate lock system
diagnosis (VTC intermediate lock posi-
tion check diagnosis)
36H VVT Monitor (Bank2) P0021 80H 9DH
VTC intake function diagnosis (VTC
alignment check diagnosis)
P0024 81H 9DH VTC exhaust function diagnosis (VTC
alignment check diagnosis)
P0021 82H 9DH VTC intake function diagnosis (VTC
drive failure diagnosis)
P0024 83H 9DH VTC exhaust function diagnosis (VTC
drive failure diagnosis)
P100B 84H 10H VEL slow response diagnosis P1093 85H 10H VEL servo system diagnosis
P0021 86H 9DH VTC intake intermediate lock function
diagnosis (VTC intermediate position
alignment check diagnosis)
Advanced: P052C Retarded: P052D 87H 9DHVTC intake intermediate lock system
diagnosis (VTC intermediate lock posi-
tion check diagnosis)
EVAP
SYSTEM 39H
EVAP control system leak
(Cap Off) P0455 80H 0CHDifference in pressure sensor output
voltage before and after pull down
3BH EVAP control system leak
(Small leak) P0442 80H 05H
Leak area index (for more than 0.04
inch)
3CH EVAP control system leak
(Very small leak) P0456 80H 05H
Leak area index (for more than 0.02
inch)
P0456 81H FDH Maximum internal pressure of EVAP
system during monitoring
P0456 82H FDH Internal pressure of EVAP system at
the end of monitoring
3DH Purge flow system P0441 83H 0CH Difference in pressure sensor output
voltage before and after vent control
valve close
Item
OBD-
MID Self-diagnostic test item DTC Test value and Test
limit
(GST display) Description
TID Unit and
Scaling ID
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM