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Nissan Versa Sedan. Instruction - part 252

EC-7

ELECTRICAL LOAD SIGNAL .........................

430

Description ............................................................

430

Component Function Check ..................................

430

Diagnosis Procedure .............................................

430

FUEL INJECTOR .............................................

432

Component Function Check ..................................

432

Diagnosis Procedure .............................................

432

Component Inspection ..........................................

433

FUEL PUMP .....................................................

434

Component Function Check ..................................

434

Diagnosis Procedure .............................................

434

Component Inspection ..........................................

436

IGNITION SIGNAL ...........................................

437

Component Function Check ..................................

437

Diagnosis Procedure .............................................

437

Component Inspection (Ignition Coil with Power
Transistor) .............................................................

440

Component Inspection (Condenser) .....................

441

MALFUNCTION INDICATOR LAMP ...............

442

Component Function Check ..................................

442

Diagnosis Procedure .............................................

442

ON BOARD REFUELING VAPOR RECOV-
ERY (ORVR) .....................................................

443

Component Function Check ..................................

443

Diagnosis Procedure .............................................

443

Component Inspection (Refueling EVAP vapor cut
valve) .....................................................................

445

Component Inspection (Drain filter) ......................

447

REFRIGERANT PRESSURE SENSOR ...........

448

Component Function Check ..................................

448

Diagnosis Procedure .............................................

448

SYMPTOM DIAGNOSIS ............................

450

ENGINE CONTROL SYSTEM SYMPTOMS ...

450

Symptom Table .....................................................

450

NORMAL OPERATING CONDITION .............

456

Description .............................................................

456

PERIODIC MAINTENANCE ......................

457

IDLE SPEED ...................................................

457

Inspection ..............................................................

457

IGNITION TIMING ...........................................

458

Inspection ..............................................................

458

EVAPORATIVE EMISSION SYSTEM .............

459

Inspection ..............................................................

459

EVAP LEAK CHECK ......................................

460

Inspection ..............................................................

460

POSITIVE CRANKCASE VENTILATION .......

462

Inspection ..............................................................

462

REMOVAL AND INSTALLATION .............

463

ECM .................................................................

463

Exploded View .......................................................

463

Removal and Installation .......................................

463

SERVICE DATA AND SPECIFICATIONS
(SDS) ..........................................................

464

SERVICE DATA AND SPECIFICATIONS
(SDS) ...............................................................

464

Idle Speed .............................................................

464

Ignition Timing .......................................................

464

Calculated Load Value ..........................................

464

Mass Air Flow Sensor ............................................

464

EC-8

< PRECAUTION >

[HR16DE]

PRECAUTIONS

PRECAUTION

PRECAUTIONS

Precaution for Supplemental Restraint System (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"

INFOID:0000000009640491

The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along

with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain

types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS

system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front

air bag, depending on the severity of a collision and whether the front occupants are belted or unbelted.

Information necessary to service the system safely is included in the SR and SB section of this Service Man-

ual.

WARNING:

• To avoid rendering the SRS inoperative, 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 incorrect removal and installation of the SRS, can lead to personal

injury caused by unintentional activation of the system. For removal of Spiral Cable and Air Bag

Module, see the SR section.

• Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this

Service Instruction. SRS wiring harnesses 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 electric 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.

Precaution for Procedure without Cowl Top Cover

INFOID:0000000009619853

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) System of Engine and A/T or CVT

INFOID:0000000009266948

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 disconnect the negative battery cable before any repair

or inspection work. The open/short circuit of related switches, sensors, solenoid valves, etc. will

cause the MIL to light up.

• Be sure to connect and lock the connectors securely 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 description and how to disconnect, refer to

PG-55, "Description"

PIIB3706J

PRECAUTIONS

EC-9

< PRECAUTION >

[HR16DE]

• 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 light up due to the short circuit.

• Be sure to connect rubber tubes properly after work. A misconnected or disconnected rubber tube

may cause the MIL to light up due to the malfunction of the fuel injection system, etc.

• Be sure to erase the unnecessary malfunction information (repairs completed) from the ECM and

TCM (Transmission control module) before returning the vehicle to the customer.

General Precautions

INFOID:0000000009266949

• 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 ignition 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. So,

engine operation can vary slightly in this case. However, this

is not an indication of a malfunction. Do not replace parts

because 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 ECM harness connector (1), fasten (B) it

securely with a lever as far as it will go as shown in the figure.

- ECM (2)

- Loosen (A)

• When connecting or disconnecting 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 condenser, thus resulting in dam-

age to ICs.

• Keep engine control system harness at least 10 cm (4 in) away

from adjacent harness, to prevent engine control system mal-

SEF289H

PBIA9222J

PBIB2947E

PBIB0090E

EC-10

< PRECAUTION >

[HR16DE]

PRECAUTIONS

functions due to receiving external 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-70, "Reference Value"

• Handle mass air flow sensor carefully to avoid damage.

• Do not clean mass air flow sensor with any type of detergent.

• Do not disassemble electric throttle control actuator.

• Even a slight leak in the air intake system can cause serious

incidents.

• Do not shock or jar the camshaft position sensor (PHASE),

crankshaft position sensor (POS).

• After performing each TROUBLE 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.

MEF040D

JSBIA1315ZZ

SEF348N

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