2014 NISSAN TEANA ECU

INTELLIGENT KEY BATTERYDLK-225
< REMOVAL AND INSTALLATION >
C
D E
F
G H
I
J
L
M A
B
DLK
N
O P
INTELLIGENT KEY BATTERY
Removal and InstallationINFOID:0000000009461977
1. Release the lock knob on the back of the Intelligent Key and remove the key.
2. Insert a suitable tool (A) wrapped with a cloth into the slit of the corner and twist it to separate the upper part from the lower part.
CAUTION:
• Do not touch the circuit board or battery terminal.
• The key fob is water-resistant. However, if it does get wet,
immediately wipe it dry.
3. Replace the battery with a new one.
4. Align the tips of the upper and lower parts, and then push them together until unit is securely closed.
CAUTION:
• When replacing battery, keep dirt, grease, and other for-
eign materials off the electrode contact area.
• After replacing the battery, check that all Intelligent Key
functions work normally.
PIIB6221E
Battery replacement :Coin-type lithium battery
(CR2032)
PIIB6222E
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

EC-2
INTAKE VALVE TIMING CONTROL ........................49
INTAKE VALVE TIMING CONTROL : System De-
scription ............................................................... ...
49
EXHAUST VALVE TIMING CONTROL ................. ...52
EXHAUST VALVE TIMING CONTROL : System
Description ........................................................... ...
52
INTAKE MANIFOLD RUNNER CONTROL ........... ...53
INTAKE MANIFOLD RUNNER CONTROL : Sys-
tem Description .................................................... ...
53
INTAKE MANIFOLD TUNING SYSTEM ...................54
INTAKE MANIFOLD TUNI NG SYSTEM : System
Description ........................................................... ...
54
ENGINE PROTECTION CONTROL AT LOW EN-
GINE OIL PRESSURE ....... .......................................
55
ENGINE PROTECTION CONTROL AT LOW EN-
GINE OIL PRESSURE : S ystem Description .........
55
FUEL FILLER CAP WARNING SYSTEM .............. ...55
FUEL FILLER CAP WARNING SYSTEM : System
Description ........................................................... ...
56
AIR CONDITIONING CUT CONTROL ................... ...56
AIR CONDITIONING CUT CONTROL : System
Description (with automatic air conditioner) ......... ...
56
AIR CONDITIONING CUT CONTROL : System
Description (with manual air conditioner) ................
57
COOLING FAN CONTROL .................................... ...58
COOLING FAN CONTROL : System Description
(with automatic air condit ioner) ...............................
59
COOLING FAN CONTROL : System Description
(with manual air conditio ner) ..................................
60
EVAPORATIVE EMISSION SYSTEM .................... ...61
EVAPORATIVE EMISSION SYSTEM : System
Description ........................................................... ...
62
AUTOMATIC SPEED CONTROL DEVICE (ASCD) ...63
AUTOMATIC SPEED CONTROL DEVICE (AS-
CD) : System Description .................................... ...
63
CAN COMMUNICATION ........................................ ...64
CAN COMMUNICATION : System Description ......64
OPERATION ................................................... ...65
AUTOMATIC SPEED CONTROL DEVICE (ASCD) ...65
AUTOMATIC SPEED CONTROL DEVICE (AS-
CD) : Switch Name and Function ........................ ...
65
ON BOARD DIAGNOSTIC (OBD) SYSTEM .....66
Diagnosis Description .......................................... ...66
GST (Generic Scan Tool) .......................................66
DIAGNOSIS SYSTEM (ECM) ............................67
DIAGNOSIS DESCRIPTION .................................. ...67
DIAGNOSIS DESCRIPTION : 1st Trip Detection
Logic and Two Trip Detection Logic .................... ...
67
DIAGNOSIS DESCRIPTION : DTC and Freeze
Frame Data .......................................................... ...
67
DIAGNOSIS DESCRIPTION : Counter System ......68
DIAGNOSIS DESCRIPTION : Driving Pattern ........71
DIAGNOSIS DESCRIPTION : System Readiness
Test (SRT) Code .................................................. ...
72
DIAGNOSIS DESCRIPTION : Permanent Diag-
nostic Trouble Code (Permanent DTC) ............... ...
73
DIAGNOSIS DESCRIPTION : Malfunction Indica-
tor Lamp (MIL) ..................................................... ...
74
On Board Diagnosis Function .................................74
CONSULT Function ................................................77
ECU DIAGNOSIS INFORMATION .............88
ECM ...................................................................88
Reference Value .................................................. ...88
Fail Safe ...............................................................101
DTC Inspection Priority Chart .............................104
DTC Index ............................................................105
Test Value and Test Limit .....................................109
WIRING DIAGRAM ...................................117
ENGINE CONTROL SYSTEM ........................ ..117
Wiring Diagram .................................................... .117
BASIC INSPECTION .................................165
DIAGNOSIS AND REPAIR WORKFLOW ...... ..165
Work Flow ............................................................ .165
Diagnostic Work Sheet .........................................168
BASIC INSPECTION ...................................... ..170
Work Procedure ................................................... .170
ADDITIONAL SERVICE WHEN REPLACING
ECM ................................................................ ..
174
Description ........................................................... .174
Work Procedure ....................................................174
VIN REGISTRATION ........................................176
Description ........................................................... .176
Work Procedure ....................................................176
ACCELERATOR PEDAL RELEASED POSI-
TION LEARNING ............................................ ..
177
Description ........................................................... .177
Work Procedure ....................................................177
THROTTLE VALVE CLOSED POSITION
LEARNING ..................................................... ..
178
Description ........................................................... .178
Work Procedure ....................................................178
IDLE AIR VOLUME LEARNING .......................179
Description ........................................................... .179
Work Procedure ....................................................179
MIXTURE RATIO SELF-LEARNING VALUE
CLEAR ............................................................ ..
181
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

EC-9
C
D E
F
G H
I
J
K L
M
EC A
N
O P
ENGINE PROTECTION CO
NTROL AT LOW EN-
GINE OIL PRESSURE : System Description ...... ..
583
FUEL FILLER CAP WARNING SYSTEM ............. ..584
FUEL FILLER CAP WARNING SYSTEM : System
Description .......................................................... ..
585
VARIABLE INDUCTION AIR SYSTEM ...................586
VARIABLE INDUCTION AIR SYSTEM : System
Description .......................................................... ..
586
INTEGRATED CONTROL OF ENGINE, CVT, AND
ABS ........................................................................ ..
587
INTEGRATED CONTROL OF ENGINE, CVT,
AND ABS : System Descri ption ............................
588
ALTERNATOR POWER GENERATION VOLT-
AGE VARIABLE CONTROL SYSTEM .................. ..
588
ALTERNATOR POWER GENERATION VOLT-
AGE VARIABLE CONTRO L SYSTEM : System
Description .......................................................... ..
588
CAN COMMUNICATION ....................................... ..588
CAN COMMUNICATION : System Description ....588
OPERATION ................................................... ..589
AUTOMATIC SPEED CONTROL DEVICE (ASCD) ..589
AUTOMATIC SPEED CONT ROL DEVICE (AS-
CD) : Switch Name and Function ........................ ..
589
ON BOARD DIAGNOSTIC (OBD) SYSTEM ....590
Diagnosis Description ......................................... ..590
GST (Generic Scan Tool) ......................................590
DIAGNOSIS SYSTEM (ECM) ...........................591
DIAGNOSIS DESCRIPTION ................................. ..591
DIAGNOSIS DESCRIPTION : 1st Trip Detection
Logic and Two Trip Detection Logic .................... ..
591
DIAGNOSIS DESCRIPTION : DTC and Freeze
Frame Data ......................................................... ..
591
DIAGNOSIS DESCRIPTION : Counter System ....592
DIAGNOSIS DESCRIPTION : Driving Pattern ......595
DIAGNOSIS DESCRIPTION : System Readiness
Test (SRT) Code ................................................. ..
596
DIAGNOSIS DESCRIPTION : Permanent Diag-
nostic Trouble Code (Permanent DTC) ............... ..
597
DIAGNOSIS DESCRIPTION : Malfunction Indica-
tor Lamp (MIL) ..................................................... ..
598
On Board Diagnosis Function ...............................598
CONSULT Function ..............................................601
ECU DIAGNOSIS INFORMATION ............613
ECM ................................................................ ..613
Reference Value ................................................. ..613
Fail-safe ................................................................627
DTC Inspection Priority Chart .............................629
DTC Index ............................................................630
Test Value and Test Limit .....................................634
WIRING DIAGRAM ....................................642
ENGINE CONTRO L SYSTEM ........................642
Wiring Diagram .................................................... ..642
BASIC INSPECTION .................................670
DIAGNOSIS AND REPAIR WORKFLOW ......670
Work Flow ............................................................ ..670
Diagnostic Work Sheet ..........................................673
BASIC INSPECTION .......................................675
Work Procedure .....................................................675
ADDITIONAL SERVICE WHEN REPLACING
ECM .................................................................
679
Description ........................................................... ..679
Work Procedure .....................................................679
ACCELERATOR PEDAL RELEASED POSI-
TION LEARNING ............................................
681
Description ........................................................... ..681
Work Procedure .....................................................681
THROTTLE VALVE CLOSED POSITION
LEARNING ....... ...............................................
682
Description ........................................................... ..682
Work Procedure .....................................................682
IDLE AIR VOLUME LEARNING .....................683
Description .............................................................683
Work Procedure .....................................................683
MIXTURE RATIO SELF-LEARNING VALUE
CLEAR ............................................................
685
Description ........................................................... ..685
Work Procedure .....................................................685
VIN REGISTRATION .......................................686
Description .............................................................686
Work Procedure .....................................................686
FUEL PRESSURE ...........................................687
Work Procedure .....................................................687
HOW TO SET SRT CODE ..............................689
Description .............................................................689
SRT Set Driving Pattern ........................................690
Work Procedure .....................................................692
HOW TO ERASE PERMANENT DTC ............695
Description .............................................................695
Work Procedure (Group A) ....................................696
Work Procedure (Group B) ....................................698
DTC/CIRCUIT DIAGNOSIS .......................701
TROUBLE DIAGNOSIS - SPECIFICATION
VALUE .............................................................
701
Description ........................................................... ..701
Component Function Check ..................................701
Diagnosis Procedure .............................................702
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

PRECAUTIONSEC-15
< PRECAUTION > [QR25DE]
C
D E
F
G H
I
J
K L
M A
EC
NP
O
PRECAUTION
PRECAUTIONS
Precaution for Supplemental
Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000009951805
The Supplemental Restraint System such as “A IR BAG” and “SEAT BELT PRE-TENSIONER”, used along
with a front seat belt, helps to reduce the risk or severi ty of injury to the driver and front passenger for certain
types of collision. Information necessary to service t he system safely is included in the SR and SB section of
this Service Manual.
WARNING:
• To avoid rendering the SRS inoper ative, which could increase the risk of personal injury or death in
the event of a collision which would result in air bag inflation, all maintenance must be performed by
an authorized NISSAN/INFINITI dealer.
• Improper maintenance, including in correct removal and installation of the SRS, can lead to personal
injury caused by unintentional act ivation of the system. For removal of Spiral Cable and Air Bag
Module, see the SR section.
• Do not use electrical test equipm ent on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identi fied by yellow and/or orange harnesses or har-
ness connectors.
PRECAUTIONS WHEN USING POWER TOOLS (AIR OR ELECTRIC) AND HAMMERS
WARNING:
• When working near the Airbag Diagnosis Sensor Un it or other Airbag System sensors with the Igni-
tion ON or engine running, DO NOT use air or el ectric power tools or strike near the sensor(s) with a
hammer. Heavy vibration could activate the sensor( s) and deploy the air bag(s), possibly causing
serious injury.
• When using air or electric power tools or hammers , always switch the Ignition OFF, disconnect the
battery and wait at least three mi nutes before performing any service.
Precaution for Procedure without Cowl Top CoverINFOID:0000000009462048
When performing the procedure after removing cowl top cover, cover
the lower end of windshield with urethane, etc to prevent damage to
windshield.
On Board Diagnostic (OBD) S ystem of Engine and CVTINFOID:0000000009462049
The ECM has an on board diagnostic system . It will light up the malfunction indicator lamp (MIL) to warn the
driver of a malfunction causing emission deterioration.
CAUTION:
• Be sure to turn the ignition switch OFF and di sconnect the negative battery cable before any repair
or inspection work. The open/short circuit of re lated switches, sensors, solenoid valves, etc. will
cause the MIL to light up.
• Be sure to connect and lock the connectors secure ly after work. A loose (unlocked) connector will
cause the MIL to light up due to the open circuit. (Be sure the connector is free from water, grease,
dirt, bent terminals, etc.)
• Certain systems and components, especially those related to OBD, may use a new style slide-lock-
ing type harness connector. For descripti on and how to disconnect, refer to PG-65, "Description"
.
• Be sure to route and secure the harnesses properly after work. The interference of the harness with
a bracket, etc. may cause the MIL to li ght up due to the short circuit.
PIIB3706J
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

EC-16
< PRECAUTION >[QR25DE]
PRECAUTIONS
• Be sure to connect rubber tubes properly afte
r work. A misconnected or disconnected rubber tube
may cause the MIL to light up due to the malfunction of the EVAP system or fuel injection system,
etc.
• Be sure to erase the unnecessary malfunction info rmation (repairs completed) from the ECM and
TCM (Transmission control module) before returning the vehicle to the customer.
General PrecautionsINFOID:0000000009462050
•Always use a 12 volt battery as power source.
• Do not attempt to disconnect battery cables while engine is
running.
• Before connecting or disconnecting the ECM harness con-
nector, turn ignition switch OFF and disconnect negative bat-
tery cable. Failure to do so may damage the ECM because
battery voltage is applied to ECM even if ignition switch is
turned OFF.
• Before removing parts, turn ig nition switch OFF and then dis-
connect battery ground cable.
• Do not disassemble ECM.
• If a battery cable is disconnected, the memory will return to
the ECM value.
The ECM will now start to self-control at its initial value.
Engine operation can vary slight ly when the terminal is dis-
connected. However, this is no t an indication of a malfunc-
tion. Do not replace parts b ecause of a slight variation.
• If the battery is disconnected, the following emission-related
diagnostic information will be lost within 24 hours.
- Diagnostic trouble codes
- 1st trip diagnostic trouble codes
- Freeze frame data
- 1st trip freeze frame data
- System readiness test (SRT) codes
- Test values
• When connecting or disconnect ing pin connectors into or
from ECM, take care not to damage pin terminals (bend or
break).
Make sure that there are not any bends or breaks on ECM pin
terminal, when connecting pin connectors.
• Securely connect ECM harness connectors.
A poor connection can cause an extremely high (surge) volt-
age to develop in coil and co ndenser, thus resulting in dam-
age to ICs.
• Keep engine control system harness at least 10 cm (4 in) away
from adjacent harness, to preven t engine control system mal-
functions due to receiving exter nal noise, degraded operation
of ICs, etc.
• Keep engine control system parts and harness dry.
• Before replacing ECM, perform ECM Terminals and Reference
Value inspection and make sure ECM functions properly.
Refer to EC-88, "Reference Value"
.
• Handle mass air flow sensor carefully to avoid damage.
• Do not clean mass air flow senso r with any type of detergent.
• Do not disassemble electric throttle control actuator.
• Even a slight leak in the ai r intake system can cause serious
incidents.
• Do not shock or jar the camshaft position sensor (PHASE),
crankshaft position sensor (POS).
SEF289H
PBIA9222J
PBIB0090E
MEF040D
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

STRUCTURE AND OPERATIONEC-39
< SYSTEM DESCRIPTION > [QR25DE]
C
D E
F
G H
I
J
K L
M A
EC
NP
O
On Board Refueling Vapor Recovery (ORVR)INFOID:0000000009462090
From the beginning of refueling, the air and vapor insi
de the fuel tank go through refueling EVAP vapor cut
valve and EVAP/ORVR line to the EVAP canister. The v apor is absorbed by the EVAP canister and the air is
released to the atmosphere.
When the refueling has reached the full level of the fuel tank, the refueling EVAP vapor cut valve is closed and
refueling is stopped because of auto shut-off. The vapor which was absorbed by the EVAP canister is purged
during driving.
WARNING:
When conducting inspectio ns below, be sure to observe the following:
• Put a “CAUTION: FLAMMABL E” sign in workshop.
• Do not smoke while servicing fuel system. Keep open flames and sparks away from work area.
• Be sure to furnish the workshop with a CO
2 fire extinguisher.
CAUTION:
• Before removing fuel line parts, carry out the following procedures:
- Put drained fuel in an explosion-proof containe r and put lid on securely.
- Release fuel pressure from fuel line. Refer to EC-536, "Inspection"
.
- Disconnect battery ground cable.
• Always replace O-ring when the fu el gauge retainer is removed.
• Do not kink or twist hose and tube when they are installed.
• Do not tighten hose and clamps excessively to avoid damaging hoses.
• After installation, run engine a nd check for fuel leaks at connection.
• Do not attempt to top off the fuel tank after the fuel pump nozzle shuts off automatically.
Continued refueling may cause fuel overflow, r esulting in fuel spray and possibly a fire.
JMBIA1930GB
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

SYSTEMEC-41
< SYSTEM DESCRIPTION > [QR25DE]
C
D E
F
G H
I
J
K L
M A
EC
NP
O
ECM controls the engine by various functions.
ENGINE CONTROL SYSTEM : Fail SafeINFOID:0000000009462092
NON DTC RELATED ITEM
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 (accelera tor angle variation and engine output limit) and device fix
mode.
Function Reference
Multiport fuel injection system EC-43, "MULTIPORT FUEL INJECTION SYSTEM : System De-
scription (with automatic air conditioner)"
Electric ignition system
EC-48, "ELECTRIC IGNITION SYSTEM : System Description"
Intake valve timing control EC-49, "INTAKE VALVE TIMING CONTROL : System Description"
Exhaust valve timing control EC-52, "EXHAUST VALVE TIMING
CONTROL : System Descrip-tion"
Intake manifold runner control EC-53, "INTAKE MANIFOLD RUNNER CONTROL : System De-scription"
Intake manifold tuning system
EC-54, "INTAKE MANIFOLD TUNI
NG SYSTEM : System Descrip-tion"
Engine protection control EC-55, "ENGINE PROTECTION CONTROL AT LOW ENGINE OIL PRESSURE : System Description"
Fuel filler cap warning systemEC-56, "FUEL FILLER CAP WARNING SYSTEM : System De-scription"
Air conditioning cut control
EC-56, "AIR CONDITIONING CUT CONTROL : System Descrip-tion (with automatic air conditioner)"
Cooling fan controlEC-59, "COOLING FAN CONTROL :
System Description (with au-tomatic air conditioner)"
Evaporative emission system EC-62, "EVAPORATIVE EMISSION
SYSTEM : System Descrip-tion"
Automatic speed control device (ASCD) EC-63, "AUTOMATIC SPEED CONTROL DEVICE (ASCD) : Sys-tem Description"
CAN communication
EC-64, "CAN COMMUNICATION : System Description"
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"
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

DIAGNOSIS SYSTEM (ECM)EC-67
< SYSTEM DESCRIPTION > [QR25DE]
C
D E
F
G H
I
J
K L
M A
EC
NP
O
DIAGNOSIS SYSTEM (ECM)
DIAGNOSIS DESCRIPTION
DIAGNOSIS DESCRIPTION : 1s
t Trip Detection Logic and Two Trip Detection Logic
INFOID:0000000009462112
When a malfunction is detected for the first time, 1st tr ip DTC and 1st trip Freeze Frame data are stored in the
ECM memory. The MIL will not illuminate at this stage. <1st trip>
If the same malfunction is detected again during the next drive, the DTC and Freeze Frame data are stored in
the ECM memory, and the MIL illuminates. The MIL illu minates at the same time when the DTC is stored.
<2nd trip> The “trip” in the “Two Trip Detection Logic” means a driving mode in which self-diagnosis is per-
formed during vehicle operation. Specific on board diagnosti c items will cause the ECM to illuminate or blink
the MIL, and store DTC and Freeze Frame data, even in the 1st trip, as shown below.
×: Applicable —: Not applicable
DIAGNOSIS DESCRIPTION : DTC and Freeze Frame DataINFOID:0000000009462113
DTC AND 1ST TRIP DTC
The 1st trip DTC (whose number is the same as the DT C number) is displayed for the latest self-diagnostic
result obtained. If the ECM memory was cleared previously , and the 1st trip DTC did not recur, the 1st trip DTC
will not be displayed.
If a malfunction is detected during the 1st trip, the 1st trip DTC is saved in the ECM memory. The MIL will not
light up (two trip detection logic). If the same malfunc tion is not detected in the 2nd trip (meeting the required
driving pattern), the 1st trip DTC is cleared from the ECM memory. If the same malfunction is detected in the
2nd trip, both the 1st trip DTC and DTC are saved in t he ECM memory and the MIL lights up. In other words,
the DTC is stored in the ECM memory and the MIL light s up when the same malfunction occurs in two consec-
utive trips. If a 1st trip DTC is stored and a non-diagnostic operation is performed between the 1st and 2nd
trips, only the 1st trip DTC will continue to be stored. Fo r malfunctions that blink or light up the MIL during the
1st trip, the DTC and 1st trip DTC are stored in the ECM memory.
For malfunctions in which 1st trip DTCs are displayed, refer to EC-105, "DTC Index"
. These items are
required by legal regulations to c ontinuously monitor the system/component . In addition, the items monitored
non-continuously are also displayed on CONSULT.
1st trip DTC is specified in Service $07 of SAE J1979/ ISO 15031-5. 1st trip DTC detection occurs without illu-
minating the MIL and therefore does not warn the driver of a malfunction.
When a 1st trip DTC is detected, check, print out or write down and erase (1st trip) DTC and Freeze Frame
data as specified in Work Flow procedure Step 2, refer to EC-165, "Work Flow"
. Then perform DTC Confirma-
tion Procedure or Component Function Check to try to duplicate the malfunction. If the malfunction is dupli-
cated, the item requires repair.
FREEZE FRAME DATA AND 1ST TRIP FREEZE FRAME DATA
The ECM records the driving conditions such as fuel system status, calculated load value, engine coolant tem-
perature, short term fuel trim, long term fuel trim, engi ne speed, vehicle speed, absolute throttle position, base
fuel schedule and intake air temperature at the moment a malfunction is detected.
Data which are stored in the ECM memory, along with the 1st trip DTC, are called 1st trip freeze frame data.
The data, stored together with the DTC data, are called freeze frame data and displayed on CONSULT or
GST. The 1st trip freeze frame data c an only be displayed on the CONSULT screen.
Items MIL DTC 1st trip DTC
1st trip 2nd trip 1st trip
displaying 2nd trip
displaying 1st trip
displaying 2nd trip
display- ing
Blinking Illuminat-
ed Blinking Illuminat-
ed
Misfire (Possible three way catalyst
damage) — DTC: P0300 – P0304
is being detected ×
———— — ×—
Misfire (Possible three way catalyst
damage) — DTC: P0300 – P0304
is being detected ——
×—— ×——
One trip detection diagnoses (Re-
fer to EC-105, "DTC Index"
.) —
×—— ×———
Except above — — — ×— ×× —
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM