2014 NISSAN TEANA ignition

REFRIGERANT PRESSURE SENSOREC-523
< DTC/CIRCUIT DIAGNOSIS > [QR25DE]
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REFRIGERANT PRESSURE SENSOR
Component Function CheckINFOID:0000000009462456
1.CHECK REFRIGERANT PRE
SSURE SENSOR FUNCTION
1. Start engine and warm it up to normal operating temperature.
2. Turn A/C switch and blower fan switch ON.
3. Check the voltage between ECM harness connector terminals under the following conditions.
*1: Except for California
*2: For California
Is the inspection result normal?
YES >> INSPECTION END
NO >> Proceed to EC-523, "Diagnosis Procedure"
.
Diagnosis ProcedureINFOID:0000000009462457
1.CHECK REFRIGERANT PRESSURE SENSOR POWER SUPPLY
1. Disconnect refrigerant pressu re sensor harness connector.
2. Turn ignition switch ON.
3. Check the voltage between refrigerant pr essure sensor harness connector and ground.
Is the inspection result normal?
YES >> GO TO 3.
NO >> GO TO 2.
2.CHECK REFRIGERANT PRESSURE SE NSOR POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check the continuity between refrigerant pre ssure sensor harness connector and ECM harness connec-
tor.
*1: Except for California
*2: For California
Is the inspection result normal?
YES >> Perform the trouble diagnosis for power supply circuit.
NO >> Repair or replace error-detected parts.
ECM
Voltage (V)
Connector +–
Te r m i n a l
E10
*1
E31*2103 124 1.0 - 4.0
+ -Vo l ta g e
(Approx.)
Refrigerant pressure sensor
Connector Terminal E219 1 Ground 5 V
+- Continuity
Refrigerant pressure sensor ECM
Connector Terminal Connector Terminal
E219 1 E10
*1
E31*2104 Existed
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

EC-524
< DTC/CIRCUIT DIAGNOSIS >[QR25DE]
REFRIGERANT PRESSURE SENSOR
3.CHECK REFRIGERANT PRESSURE SENSOR GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check the continuity between refrigerant pre ssure sensor harness connector and ECM harness connec-
tor.
*1: Except for California
*2: For California
4. Also check harness for short to power.
Is the inspection result normal?
YES >> GO TO 4.
NO >> Repair or replace error-detected parts.
4.CHECK REFRIGERANT PRESSURE SE NSOR INPUT SIGNAL CIRCUIT
1. Check the continuity between refrigerant pre ssure sensor harness connector and ECM harness connec-
tor.
*1: Except for California
*2: For California
2. Also check harness for short to ground and to power.
Is the inspection result normal?
YES >> GO TO 5.
NO >> Repair or replace error-detected parts.
5.CHECK INTERMITTENT INCIDENT
Check intermittent incident. Refer to GI-43, "Intermittent Incident"
.
Is the inspection result normal?
YES >> Replace refrigerant pressure sensor. Refer to HAC-107, "Removal and Installation" (with auto-
matic air conditioner) or HAC-163, "Removal and Installation"
(with manual air conditioner).
NO >> Repair or replace error-detected parts.
+-
Continuity
Refrigerant pressure sensor ECM
Connector Terminal Connector Terminal
E219 3 E10
*1
E31*2124 Existed
+-
Continuity
Refrigerant pressure sensor ECM
Connector Terminal Connector Terminal
E219 2 E10
*1
E31*2103 Existed
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

SENSOR POWER SUPPLY 2 CIRCUITEC-525
< DTC/CIRCUIT DIAGNOSIS > [QR25DE]
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SENSOR POWER SUPPLY 2 CIRCUIT
DescriptionINFOID:0000000009462458
ECM supplies a voltage of 5 V to some of the sensors systematically divided into 2 groups, respectively.
Accordingly, when a short circuit develops in a sensor power source, a malfunction may occur simultaneously
in the sensors belonging to the same group as the short-circuited sensor.
Sensor power supply 1
• APP sensor 1
• Battery current sensor
• CKP sensor (POS)
• Intake manifold runner control valve position sensor
• Refrigerant pressure sensor
• TP sensor
NOTE:
If sensor power supply 1 circuit is malfunctioning, DTC P0643 is displayed.
Sensor power supply 2
• APP sensor 2
• CMP sensor (PHASE)
• EVT control position sensor
• EOP sensor
• MAF sensor
Diagnosis ProcedureINFOID:0000000009462459
1.CHECK APP SENSOR 2 POWER SUPPLY CIRCUIT-1
1. Turn ignition switch OFF.
2. Disconnect accelerator pedal position (APP) sensor harness connector.
3. Turn ignition switch ON.
4. Check the voltage between APP sensor harness connector and ground.
Is the inspection result normal?
YES >> INSPECTION END
NO >> GO TO 2.
2.CHECK APP SENSOR 2 POWER SUPPLY CIRCUIT-2
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check the continuity between APP sens or harness connector and ECM harness connector.
*1: Except for California
*2: For California
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair open circuit.
+
-Vo l ta g e
(Approx.)
APP sensor
Connector Terminal E40 5 Ground 5V
++ Continuity
APP sensor ECM
Connector Terminal Connector Terminal
E40 5 E10
*1
E31*2118 Existed
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

ENGINE CONTROL SYSTEMEC-527
< SYMPTOM DIAGNOSIS > [QR25DE]
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SYMPTOM DIAGNOSIS
ENGINE CONTROL SYSTEM
Symptom TableINFOID:0000000009462460
SYSTEM — BASIC ENGINE CONTROL SYSTEM
SYMPTOM
Reference page
HARD/NO START/RESTART (EXCP. HA)
ENGINE STALL
HESITATION/SURGING/FLAT SPOT
SPARK KNOCK/DETONATION
LACK OF POWER/POOR ACCELERATION
HIGH IDLE/LOW IDLE
ROUGH IDLE/HUNTING
IDLING VIBRATION
SLOW/NO RETURN TO IDLE
OVERHEATS/WATER TEMPERATURE HIGH
EXCESSIVE FUEL CONSUMPTION
EXCESSIVE OIL CONSUMPTION
BATTERY DEAD (UNDER CHARGE)
Warranty symptom code AA AB AC AD AE AF AG AH AJ AK AL AM HA
Fuel Fuel pump circuit 11232 22 3 2 EC-508
Fuel pressure regulator system 334444444 4EC-182
Fuel injector circuit 11232 22 2EC-505
Fuel level sensor circuitEC-376,
EC-378
Fuel tank temperature sensor circuit EC-304,
EC-306
Evaporative emission system 334444444 4 EC-536
Air Positive crankcase ventilation sys-
tem 334444444 41
EC-539
Incorrect idle speed adjustment 1 1 1 1 1 EC-179
Electric throttle control actuator 112332222 2 2EC-475,
EC-480
IgnitionIncorrect ignition timing adjustment33111 11 1 EC-535
Ignition circuit 11222 22 2EC-511
Main power supply and ground circuit 22333 33 23 EC-203
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

IGNITION TIMINGEC-535
< PERIODIC MAINTENANCE > [QR25DE]
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IGNITION TIMING
InspectionINFOID:0000000009462464
1.CHECK IGNITION TIMING
1. Attach timing light (A) to the ignition coil No.1 harness .
2. Check ignition timing. >> INSPECTION END
JPBIA5853ZZ
: Timing indicator
JPBIA5854ZZ
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

EVAP LEAK CHECKEC-537
< PERIODIC MAINTENANCE > [QR25DE]
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EVAP LEAK CHECK
InspectionINFOID:0000000009462466
CAUTION:
• Do not use compressed air or a high pressure pump.
• Do not exceed 4.12 kPa (0.042 kg/cm
2, 0.6 psi) of pressure in EVAP system.
NOTE:
• Do not start engine.
• Improper installation of EVAP service port adapter [commercial service tool: (J-41413-OBD)] to the EVAP
service port may cause a leak.
1.EVAP LEAK CHECK
With CONSULT
1. Install EVAP service port adapter [commercial service tool: (J- 41413-OBD)] and pressure pump to EVAP service port.
2. Turn ignition switch ON.
3. Select the “EVAP SYSTEM CLOSE” in “WOR K SUPPORT” mode of “ENGINE” using CONSULT.
4. Touch “START”. A bar graph (Pressure indicating display) will appear on the screen.
5. Apply positive pressure to the EVAP system until t he pressure indicator reaches the middle of the bar
graph.
6. Remove EVAP service port adapter [commercial service tool: (J-41413-OBD)] and hose with pressure
pump.
7. Locate the leak using a leak detector [commercial service tool: (J-41416)]. Refer to EC-62, "EVAPORATIVE EMISSION SYS-
TEM : System Description".
Without CONSULT
1. Install EVAP service port adapter [commercial service tool: (J- 41413-OBD)] and pressure pump to EVAP service port.
SEF462UA
SEF200U
SEF462UA
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

SERVICE DATA AND SPECIFICATIONS (SDS)EC-541
< SERVICE DATA AND SPECIFICATIONS (SDS) [QR25DE]
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SERVICE DATA AND SPECIFICATIONS (SDS)
SERVICE DATA AND SPECIFICATIONS (SDS)
Idle SpeedINFOID:0000000009462469
*: Under the following conditions
• A/C switch: OFF
• Electric load: OFF (Lights, heater fan & rear window defogger)
• Steering wheel: Kept in straight-ahead position
Ignition TimingINFOID:0000000009462470
*: Under the following conditions
• A/C switch: OFF
• Electric load: OFF (Lights, heater fan & rear window defogger)
• Steering wheel: Kept in straight-ahead position
Calculated Load ValueINFOID:0000000009462471
Mass Air Flow SensorINFOID:0000000009462472
*: Engine is warmed up to normal operating temperature and running under no load. Condition Specification
No load* (in P or N position) 650 ± 50 rpm
Condition Specification
No load* (in P or N position) 10 ± 2 ° BTDC
Condition Specification (Using CONSULT or GST)
At idle 10 – 35 %
At 2,500 rpm 10 – 35 %
Supply voltageBattery voltage (11 – 14 V)
Output voltage at idle 1.3 – 1.6 V*
Mass air flow (Using CONSULT or GST) 1.0 – 4.0 g/s at idle*
4.0 – 10.0 g/s at 2,500 rpm*
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM

EC-542
< PRECAUTION >[VQ35DE]
PRECAUTIONS
PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint Syst
em (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000009976114
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 the system safely is included in the SR and SB section of
this Service Manual.
WARNING:
• To avoid rendering the SRS inopera tive, 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 NISS AN/INFINITI dealer.
• Improper maintenance, including in correct removal and installation of the SRS, can lead to personal
injury caused by unintent ional activation of the system. For re moval of Spiral Cable and Air Bag
Module, see the SR section.
• Do not use electrical test equipmen t on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harn esses can be identified 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 Unit or other Airbag System sensors with the Igni-
tion ON or engine running, DO NOT use air or electri c 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 minutes before performing any service.
On Board Diagnosti c (OBD) System of Engine and CVTINFOID:0000000009462476
The ECM has an on board diagnostic system. It will illuminate the malfunction indicator lamp (MIL) to warn the
driver of a malfunction causing emission deterioration.
CAUTION:
• Always to turn the ignition swit ch OFF and disconnect 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 illuminate.
• Always to connect and lock the connectors securely after work. A loose (unlocked) connector will
cause the MIL to illuminate 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 descrip tion and how to disconnect, refer to PG-65, "Description"
.
• Always route and secure the harnesses properly afte r work. The interference of the harness with a
bracket, etc. may cause the MIL to illu minate due to the short circuit.
• Always to connect rubber tubes properly after work. A misconnected or disconnected rubber tube
may cause the MIL to illuminate due to the malfuncti on of the EVAP system or fuel injection system,
etc.
• Always to erase the unnecessary malfunction informati on (repairs completed) from the ECM and
TCM (Transmission control module) before returning the vehicle to the customer.
Revision: November 20132014 Altima NAMRevision: November 20132014 Altima NAM