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Nissan Altima HL32 Hybrid. Manual - part 368

EC-456

< SYMPTOM DIAGNOSIS >

[QR25DE]

ENGINE CONTROL SYSTEM SYMPTOMS

Air

Air duct

EM-24

Air cleaner

EM-24

Air leakage from air duct
(Mass air flow sensor — electric throt-
tle control actuator)

EM-24

Electric throttle control actuator

EM-25

Air leakage from intake manifold/Col-
lector/Gasket

EM-25

Cranking

Signal plate

EM-71

Engine

Cylinder head

EM-62

Cylinder head gasket

Cylinder block

EM-75

Piston

Piston ring

Connecting rod

Bearing

Crankshaft

Valve
mecha-
nism

Timing chain

EM-51

Camshaft

EM-40

Intake valve timing control

EM-51

Intake valve

EM-62

Exhaust valve

Exhaust

Exhaust manifold/Tube/Muffler/Gasket

EM-29

EX-6

Three way catalyst

HC adsorption catalyst

EX-6

Lubrica-
tion

Oil pan/Oil strainer/Oil pump/Oil filter/
Oil gallery/Oil cooler

Oil level (Low)/Filthy oil

LU-8

SYMPTOM

Reference
page

HARD/NO S

T/RES

T (E

XCP

. HA)

GINE

ALL

HES

TION/SURGING/FLA

SPOT

ARK KNOC

/DET

LACK OF

POWER/POOR ACCELERA

TION

HIG

IDL

ROUGH IDLE/HUNTING

LING VI

BRA

ION

LOW/NO RETU

OVERHEA

TER TEMPERA

URE HIG

CESSIVE

FUEL CON

UMP

ION

CESSIVE

OIL

NSUMP

ION

Warranty symptom code

AG AH

ENGINE CONTROL SYSTEM SYMPTOMS

EC-457

< SYMPTOM DIAGNOSIS >

[QR25DE]

1 - 6: The numbers refer to the order of inspection.

Cooling

Radiator/Hose/Radiator filler cap

Thermostat

Water pump

Water gallery

Cooling fan

Coolant level (Low)/Contaminated
coolant

CO-10

SYMPTOM

Reference
page

HARD/NO S

T/RES

T (E

XCP

. HA)

GINE

ALL

HES

TION/SURGING/FLA

SPOT

ARK KNOC

/DET

LACK OF

POWER/POOR ACCELERA

TION

HIG

IDL

ROUGH IDLE/HUNTING

LING VI

BRA

ION

LOW/NO RETU

OVERHEA

TER TEMPERA

URE HIG

CESSIVE

FUEL CON

UMP

ION

CESSIVE

OIL

NSUMP

ION

Warranty symptom code

AG AH

EC-458

< SYMPTOM DIAGNOSIS >

[QR25DE]

NORMAL OPERATING CONDITION

NORMAL OPERATING CONDITION

Description

INFOID:0000000004211666

FUEL CUT CONTROL (AT NO LOAD AND HIGH ENGINE SPEED)

If the engine speed is above 1,800 rpm under no load (for example, the selector lever position is P and engine

speed is over 1,800 rpm) fuel will be cut off after some time. The exact time when the fuel is cut off varies

based on engine speed.

Fuel cut will be operated until the engine speed reaches 1,500 rpm, then fuel cut will be cancelled.

NOTE:

This function is different from deceleration control listed under Multiport Fuel Injection (MFI) System,

EC-27,

"System Description"

PRECAUTIONS

EC-459

< PRECAUTION >

[QR25DE]

PRECAUTION

PRECAUTIONS

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

INFOID:0000000004495400

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 SRS 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 SRS section.

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

Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or har-

ness connectors.

Precaution for Procedure without Cowl Top Cover

INFOID:0000000004495402

When performing the procedure after removing cowl top cover, cover

the lower end of windshield with urethane, etc.

On Board Diagnostic (OBD) System of Engine

INFOID:0000000004211670

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-59, "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 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 EVAP system or fuel injection system,

etc.

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

returning the vehicle to the customer.

PIIB3706J

Content .. 366 367 368 369 ..