fuel NISSAN TEANA 2014 Workshop Manual

EC-13
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P1574 ASCD VEHICLE SPEED SENSOR .... ..918
Description .......................................................... ..918
DTC Logic .............................................................918
Diagnosis Procedure .............................................918
P1800 VIAS CONTROL SOLENOID VALVE 1 ..920
DTC Logic ........................................................... ..920
Diagnosis Procedure .............................................920
Component Inspection ..........................................921
P1801 VIAS CONTROL SOLENOID VALVE 2 ..922
DTC Logic ........................................................... ..922
Diagnosis Procedure .............................................922
Component Inspection ..........................................923
P1805 BRAKE SWITCH ................................. ..924
Description .......................................................... ..924
DTC Logic .............................................................924
Diagnosis Procedure .............................................924
Component Inspection (Stop Lamp Switch) ..........926
Component Inspection (Stop Lamp Relay) ...........926
P2096, P2097, P2098, P2099 A/F SENSOR 1 ..927
DTC Logic ........................................................... ..927
Diagnosis Procedure .............................................927
P2100, P2103 THROTTLE CONTROL MO-
TOR RELAY ................................................... ..
931
DTC Logic ........................................................... ..931
Diagnosis Procedure .............................................931
P2101 ELECTRIC THROTTLE CONTROL
FUNCTION ..................................................... ..
933
DTC Logic ........................................................... ..933
Diagnosis Procedure .............................................933
Component Inspection ..........................................935
P2118 THROTTLE CONTROL MOTOR ..........936
DTC Logic ........................................................... ..936
Diagnosis Procedure .............................................936
Component Inspection ..........................................937
P2119 ELECTRIC THROTTLE CONTROL
ACTUATOR .................................................... ..
938
DTC Logic ........................................................... ..938
Diagnosis Procedure .............................................938
P2122, P2123 APP SENSOR ...........................940
DTC Logic ........................................................... ..940
Diagnosis Procedure .............................................940
Component Inspection ..........................................941
P2127, P2128 APP SENSOR ...........................942
DTC Logic ........................................................... ..942
Diagnosis Procedure .............................................942
Component Inspection ..........................................943
P2135 TP SENSOR ..........................................945
DTC Logic ........................................................... ..945
Diagnosis Procedure .............................................945
Component Inspection ..........................................946
P2138 APP SENSOR ......................................947
DTC Logic ............................................................ ..947
Diagnosis Procedure .............................................947
Component Inspection ...........................................949
BRAKE PEDAL POSITION SWITCH .............950
Component Function Check ..................................950
Diagnosis Procedure .............................................950
Component Inspection (Brake Pedal Position
Switch) ................................................................. ..
951
ASCD INDICATOR ..........................................952
Component Function Check ..................................952
Diagnosis Procedure .............................................952
COOLING FAN ................................................953
Component Function Check ..................................953
Diagnosis Procedure .............................................953
Component Inspection (Cooling Fan Motor) ..........955
Component Inspection (Cooling Fan Relay) ..........956
ELECTRICAL LOAD SIGNAL ........................957
Description .............................................................957
Component Function Check ..................................957
Diagnosis Procedure .............................................957
ELECTRONIC CONTROLLED ENGINE
MOUNT ............................................................
959
Component Function Check ................................ ..959
Diagnosis Procedure .............................................959
Component Inspection ...........................................960
FUEL INJECTOR ............................................962
Component Function Check ..................................962
Diagnosis Procedure .............................................962
Component Inspection ...........................................963
FUEL PUMP ....................................................965
Component Function Check ..................................965
Diagnosis Procedure .............................................965
Component Inspection ...........................................966
IGNITION SIGNAL ..........................................967
Component Function Check ..................................967
Diagnosis Procedure .............................................967
Component Inspection (Ignition Coil with Power
Transistor) ........................................................... ..
970
Component Inspection (Condenser) ......................971
INFORMATION DISPLAY (ASCD) .................972
Component Function Check ..................................972
Diagnosis Procedure .............................................972
MALFUNCTION INDICATOR LAMP ..............973
Component Function Check ..................................973
Diagnosis Procedure .............................................973
ON BOARD REFUELING VAPOR RECOV-
ERY (ORVR) ....................................................
974
Component Function Check ................................ ..974
Diagnosis Procedure .............................................974
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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
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PRECAUTIONSEC-17
< PRECAUTION > [QR25DE]
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•
After performing each TROUBL E DIAGNOSIS, perform DTC
CONFIRMATION PROCEDURE or Component Function
Check. The DTC should not be displayed in the DTC Confir-
mation Procedure if the repair is completed. The Component
Function Check should be a good result if the repair is com-
pleted.
• When measuring ECM signals with a circuit tester, never allow
the two tester probes to contact.
Accidental contact of probes will cause a short circuit and
damage the ECM power transistor.
• Do not operate fuel pump when there is no fuel in lines.
• Tighten fuel hose clamps to the specified torque.
• Do not depress accelerator pedal when starting.
• Immediately after starting, do not rev up engine unnecessar-
ily.
• Do not rev up engine ju st prior to shutdown.
JSBIA1315ZZ
SEF348N
SEF709Y
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PREPARATIONEC-19
< PREPARATION > [QR25DE]
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PREPARATION
PREPARATION
Special Service ToolsINFOID:0000000009462051
The actual shape of the tools may di
ffer from those illustrated here.
Commercial Service ToolsINFOID:0000000009462052
Tool number
(TechMate No.)
Tool name Description
(J-44321)
Fuel pressure gauge
kit Checks fuel pressure
KV10120000
Fuel tube adapter Measures fuel pressure
LEC642
JSBIA0410ZZ
Tool name
(TechMate No.) Description
Leak detector
i.e.: (J-41416) Locates the EVAP leak
EVAP service port
adapter
i.e.: (J-41413-OBD) Applies positive pressure through EVAP service
port
Fuel filler cap adapter
i.e.: (MLR-8382) Checks fuel tank vacuum relief valve opening
pressure
S-NT703
S-NT704
S-NT815
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EC-22
< SYSTEM DESCRIPTION >[QR25DE]
COMPONENT PARTS
ENGINE COMPARTMENT
Intake manifold runner control valve actuator
EC-31, "Intake Manifold Runner Control Valve"
Electric throttle control actuator
(with built in throttle position sensor and throttle control motor) EC-25, "Electric Thrott
le Control Actuator"
EVAP service port When perform the EVAP leak check, positive pressure is
delivered to the EVAP system through the EVAP service
port.
Refer to EC-537, "Inspection"
.
No. Component Function
JPBIA5840ZZ
Engine rear side Intake side
: Vehicle front
No. Component Function
Exhaust valve timing control position sensor EC-30, "Exhaust Valve Timing Control Position Sensor"
Camshaft position sensor (PHASE)EC-29, "Camshaft Position Sensor (PHASE)"
PCV valveThe positive crankcase ventilation (PCV) valve is provided
to conduct crankcase blow-by gas to the intake manifold.
Fuel injector EC-26, "Fuel Injector"
Crankshaft position sensor (POS)EC-29, "Crankshaft Position Sensor (POS)"
Knock sensorEC-33, "Knock Sensor"
Engine oil temperature sensorEC-33, "Engine Oil Temperature Sensor"
Engine oil pressure sensorEC-33, "Engine Oil Pressure Sensor"
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COMPONENT PARTSEC-23
< SYSTEM DESCRIPTION > [QR25DE]
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EXHAUST COMPARTMENT
BODY COMPARTMENT
Intake valve timing intermediate lock control solenoid valve
EC-30, "Intake Valve Timing Intermediate Lock Control So-lenoid Valve"
Intake valve timing control solenoid valve
EC-30, "Intake Valve Timing Control Solenoid Valve"
Exhaust valve timing control solenoid valveEC-31, "Exhaust Valve Timing Control Solenoid Valve"
Ignition coil (with power transistor)EC-26, "Ignition Coil With Power Transistor"
Engine coolant temperature sensorEC-28, "Engine Coolant Temperature Sensor"
Intake manifold tuning valveEC-31, "Intake Manifold Tuning Valve"
Intake manifold runner control valve position sensor
EC-31, "Intake Manifold Runner Control Valve"
Intake manifold runner control valve actuator
No. Component Function
To engine assembly
JPBIA5841ZZ
No. Component Function
Air fuel ratio (A/F) sensor 1 EC-32, "Air Fuel Ratio (A/F) Sensor 1"
Heated oxygen sensor 2EC-32, "Heated Oxygen Sensor 2"
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EC-24
< SYSTEM DESCRIPTION >[QR25DE]
COMPONENT PARTS
A. Instrument panel area B. Periphery of pedals C. Inside fuel tank area
D. Behind fuel tank
: Vehicle front
No. Component Function Combination meter Malfunction indicator lamp (MIL)
EC-36, "Malfunction Indicator lamp (MIL)"
Information displayEC-37, "Information Display"
ASCD steering switch EC-37, "ASCD Steering Switch"
Stop lamp switch
EC-36, "Stop Lamp Switch & Brake Pedal Position Switch"
Brake pedal position switch
Accelerator pedal position sensor EC-25, "Accelerator Pedal Position Sensor"
Fuel level sensor unit and fuel pumpEC-26, "Fuel Level Sensor Unit and Fuel Pump"
Fuel tank temperature sensorEC-27, "Fuel Tank Temperature Sensor"
EVAP control system pressure sensorEC-35, "EVAP Control System Pressure Sensor"
EVAP canister vent control valve EC-35, "EVAP Canister Vent Control Valve"
EVAP canisterEC-34, "EVAP Canister"
ALBIA0806ZZ
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COMPONENT PARTSEC-25
< SYSTEM DESCRIPTION > [QR25DE]
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ECMINFOID:0000000009462054
The ECM consists of a microcomputer and connectors for signal
input and output and for power supply. The ECM controls the engine.
Accelerator Pedal Position SensorINFOID:0000000009462055
The accelerator pedal position sensor is installed on the upper end
of the accelerator pedal assembly. The sensor detects the accelera-
tor position and sends a signal to the ECM.
Accelerator pedal position sensor has two sensors. These sensors
are a kind of potentiometers which transform the accelerator pedal
position into output voltage, and emit the voltage signal to the ECM.
In addition, these sensors detect the opening and closing speed of
the accelerator pedal and feed the voltage signals to the ECM. The
ECM judges the current opening angle of the accelerator pedal from
these signals and controls the throttle control motor based on these
signals.
Idle position of the accelerato r pedal is determined by the ECM
receiving the signal from the acce lerator pedal position sensor. The
ECM uses this signal for the engine operation such as fuel cut.
Electric Throttle Control ActuatorINFOID:0000000009462056
Electric throttle control actuator cons ists of throttle body, throttle valve, throttle control motor and throttle posi-
tion sensor.
JPBIA5843ZZ
JPBIA5844ZZ
PBIB1741E
JSBIA0270GB
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EC-26
< SYSTEM DESCRIPTION >[QR25DE]
COMPONENT PARTS
THROTTLE CONTROL MOTOR RELAY
Power supply for the throttle control motor is provided to
the ECM via throttle control motor relay. The throttle
control motor relay is ON/OFF controlled by the ECM. When the ignition switch is turned ON, the ECM sends
an ON signal to throttle control motor relay and battery voltage is provided to the ECM. When the ignition
switch is turned OFF, the ECM sends an OFF signal to throttle control motor relay and battery voltage is not
provided to the ECM.
THROTTLE CONTROL MOTOR
The throttle control motor is operated by the ECM and it opens and closes the throttle valve.
The current opening angle of the throttle valve is detected by the throttle position sensor and it provides feed-
back to the ECM to control the throttle control mo tor to make the throttle valve opening angle properly in
response to driving condition.
THROTTLE POSITION SENSOR
The throttle position sensor responds to the throttle valve movement.
The throttle position sensor has two sensors. These sensors are a
kind of potentiometers which transform the throttle valve position into
output voltage, and emit the voltage signal to the ECM. In addition,
these sensors detect the opening and closing speed of the throttle
valve and feed the voltage signals to the ECM. The ECM judges the
current opening angle of the throttle valve from these signals and the
ECM controls the throttle control motor to make the throttle valve
opening angle properly in response to driving condition.
Ignition Coil With Power TransistorINFOID:0000000009462057
The ignition signal from the ECM is sent to and amplified by the
power transistor. The power transistor turns ON and OFF the ignition
coil primary circuit. This ON/OFF operation induces the proper high
voltage in the coil secondary circuit.
Fuel InjectorINFOID:0000000009462058
The fuel injector is a small, precise solenoid valve. When the ECM
supplies a ground to the fuel injector circuit, the coil in the fuel injec-
tor is energized. The energized coil pulls the ball valve back and
allows fuel to flow through the fuel injector into the intake manifold.
The amount of fuel injected depends upon the injection pulse dura-
tion. Pulse duration is the length of time the fuel injector remains
open. The ECM controls the injection pulse duration based on
engine fuel needs.
Fuel Level Sensor Unit and Fuel PumpINFOID:0000000009462059
FUEL PUMP
PBIB0145E
JPBIA4613ZZ
JPBIA5845ZZ
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COMPONENT PARTSEC-27
< SYSTEM DESCRIPTION > [QR25DE]
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The ECM activates the fuel pump for 1 second after the ignition
switch is turned ON to improve engine start ability. If the ECM
receives a engine speed signal from the camshaft position sensor
(PHASE), it knows that the engine is rotating, and causes the pump
to operate. If the engine speed signal is not received when the igni-
tion switch is ON, the engine stalls. The ECM stops pump operation
and prevents battery discharging, thereby improving safety. The
ECM does not directly drive the fuel pump. It sends the control signal
to the fuel pump control module, which in turn controls the fuel
pump.
FUEL LEVEL SENSOR
The fuel level sensor is mounted in the fuel level sensor unit.
The sensor detects a fuel level in the fuel tank and tr ansmits a signal to the combination meter. The combina-
tion meter sends the fuel level sensor signal to the ECM via the CAN communication line.
It consists of two parts, one is mechanical float and the ot her is variable resistor. Fuel level sensor output volt-
age changes depending on the movement of the fuel mechanical float.
Fuel Tank Temperature SensorINFOID:0000000009462060
The fuel tank temperature sensor is used to detect the fuel tempera-
ture inside the fuel tank. The sensor modifies a voltage signal from
the ECM. The modified signal returns to the ECM as the fuel temper-
ature input. The sensor uses a ther mistor which is sensitive to the
change in temperature. The electrical resistance of the thermistor
decreases as temperature increases.

*: These data are reference values and are measured between ECM terminals.
Mass Air Flow Sensor (With Intake Air Temperature Sensor)INFOID:0000000009462061
MASS AIR FLOW SENSOR
JPBIA5842ZZ
Condition Fuel pump operation
Ignition switch is turned to ON. Operates for 1 second.
Engine running and cranking Operates.
When engine is stopped Stops in 1.5 seconds.
Except as shown above Sto ps .
SEF012P
Fluid temperature
[° C ( °F)] Voltage* (V) Resistance (k
Ω)
20 (68) 3.5 2.3 - 2.7
50 (122) 2.2 0.79 - 0.90
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