Engine Mechanical.pdf

1NZ-FE ENGINE MECHANICAL – ENGINE

EM–1

ENGINE

ON-VEHICLE INSPECTION

1. INSPECT ENGINE COOLANT (See page CO-1 )

2. INSPECT ENGINE OIL (See page LU-1 )

3. INSPECT BATTERY (See page CH-4 )

4. INSPECT AIR CLEANER FILTER ELEMENT SUB-

ASSEMBLY

(a) Remove the air cleaner filter element sub-assembly.

(b) Visually check that there is no dirt, blockage, or

damage to the air cleaner filter element.

HINT:

• If there is any dirt or a blockage in the air cleaner

filter element, clean it with compressed air.

• If any dirt or a blockage remains even after

cleaning the air cleaner filter element with

compressed air, replace it.

5. INSPECT SPARK PLUG (See page IG-5 )

6. INSPECT IGNITION TIMING

(a) When using an intelligent tester:

(1) Warm up and stop the engine.

(2) Connect the intelligent tester to the DLC3.

(3) Turn the ignition switch ON.

(4) Select the following menu items:

DIAGNOSIS / ENHANCED OBD II/ ACTIVE

TEST / TC (TE1) / ON.

HINT:

Refer to the intelligent tester operator's manual

for further details.

(5) Inspect the ignition timing during idling.

Ignition timing:

8 to 12 degrees BTDC

NOTICE:

• Turn all the electrical systems and the A/

C off.

• Inspect the ignition timing with the

cooling fan off.

• When checking the ignition timing, shift

the transmission to the neutral position.

(6) Select the following menu items: TC (TE1) /

OFF.

(7) Turn the ignition switch OFF.

(8) Disconnect the intelligent tester from the DLC3.

(b) When not using an intelligent tester:

(1) Remove cylinder head cover No. 2 (see page

IG-9 ).

Intelligent Tester

DLC3

CAN VIM

A125658E01

EM–2

1NZ-FE ENGINE MECHANICAL – ENGINE

A116196

(2) Pull out the wire harness (brown) shown in the

illustration.

NOTICE:

After checking, wrap the wire harness with

tape.

(3) Warm up and stop the engine.

(4) Connect the clip of the timing light to the wire

harness.

NOTICE:

Use a timing light that detects the first

signal.

(5) Turn the ignition switch ON.

(6) Using SST, connect terminals 13 (TC) and 4

(CG) of the DLC3.

SST 09843-18040

NOTICE:

Examine the terminal numbers before

connecting them. Connecting the wrong

terminals could damage the engine.

(7) Inspect the ignition timing during idling.

Ignition timing:

8 to 12 degrees BTDC

NOTICE:

• Turn all the electrical systems and the A/

C off.

• Inspect the ignition timing with the

cooling fan off.

• When checking the ignition timing, shift

the transmission to the neutral position.

(8) Disconnect terminals 13 (TC) and 4 (CG) of the

DLC3.

(9) Turn the ignition switch OFF.

(10) Remove the timing light.

(11) Install cylinder head cover No. 2 (see page IG-

10 ).

7. INSPECT ENGINE IDLING SPEED

(a) When using an intelligent tester:

(1) Warm up and stop the engine.

(2) Connect the intelligent tester to the DLC3.

(3) Turn the ignition switch ON.

(4) Select the following menu items:

DIAGNOSIS / ENHANCED OBD II/ DATA LIST

/ PRIMARY / ENGINE SPD.

HINT:

Refer to the intelligent tester operator's manual

for further details.

(5) Inspect the engine idling speed.

Idling speed:

550 to 650 rpm for manual transaxle

650 to 750 rpm for automatic transaxle

NOTICE:

• Turn all the electrical systems and the A/

C off.

DLC3

1 2 345 6 7 8

910111213141516

A082779E23

Intelligent Tester

DLC3

CAN VIM

A125658E01

1NZ-FE ENGINE MECHANICAL – ENGINE

EM–3

DLC3

• Inspect the idling speed with the cooling

fan off.

• When checking the idling speed, shift the

transmission to either the neutral

position or the parking position.

(6) Turn the ignition switch OFF.

(7) Disconnect the intelligent tester from the DLC3.

(b) When not using an intelligent tester.

(1) Warm up and stop the engine.

(2) Install SST to terminal 9 (TAC) of the DLC3,

then connect a tachometer.

SST 09843-18040

NOTICE:

Examine the terminal numbers before

connecting them. Connecting the wrong

terminals could damage the engine.

(3) Turn the ignition switch ON.

(4) Inspect the engine idling speed.

Idling speed:

550 to 650 rpm for manual transaxle

650 to 750 rpm for automatic transaxle

(5) Turn the ignition switch OFF.

(6) Disconnect the tachometer.

(7) Remove SST from terminal 9 (TAC).

8. INSPECT COMPRESSION

(a) Warm up and stop the engine.

(b) Remove cylinder head cover No. 2 (see page IG-9 ).

(d) Remove the 4 spark plugs.

(e) Disconnect the 4 fuel injector connectors.

(f) Inspect the cylinder compression pressure.

(1) Insert a compression gauge into the spark plug

hole.

(2) Fully open the throttle.

(3) While cranking the engine, measure the

compression pressure.

Compression:

1,471kPa (15.0 kgf/cm 2 , 213 psi)

Minimum pressure:

1,079 kPa (11.0 kgf/cm 2 , 156 psi)

Difference between each cylinder:

98 kPa (1.0 kgf/cm 2 , 14 psi) or less

NOTICE:

• Use a fully-charged battery so the engine

speed can be increased to 250 rpm or

more.

• Inspect the other cylinders in the same

way.

• Measure the compression in as short a

time as possible.

1234 5 67 8

910111213141516

TAC

A082779E24

A116195

EM–4

1NZ-FE ENGINE MECHANICAL – ENGINE

(4) If the cylinder compression is low, pour a light

coat of engine oil into the cylinder through the

spark plug hole, then inspect it again.

HINT:

• If adding oil increases the compression, the

piston rings and/or cylinder bore may be

worn or damaged.

• If the pressure stays low, the valve may be

stuck or seated improperly, or there may be

leakage from the gasket.

(g) Connect the 4 fuel injector connectors.

(h) Install the 4 spark plugs.

Torque: 18 N*m (184 kgf*cm, 13 ft.*lbf)

(i) Install the 4 ignition coils (see page IG-9 ).

(j) Install cylinder head cover No. 2 (see page IG-10 ).

9. INSPECT CO/HC

(a) Start the engine.

(b) Run the engine at 2,500 rpm for approximately 180

seconds.

(1.3 ft) into the tailpipe while idling.

(d) Check the CO/HC concentration during idling and

when running at 2,500 rpm.

HINT:

When doing the 2 mode (with the engine idling/

running at 2,500 rpm) test, the measuring

procedures are determined by applicable local

regulations.

If the CO/HC concentration does not comply with

the regulations, troubleshoot in the order given

below.

(1) Check the heated oxygen sensor operation

(see page ES-276 ).

(2) See the table below for possible causes, then

inspect the applicable parts and repair them if

necessary.

Problems

Possible Causes

Normal

High

Rough idling

1. Faulty ignition:

– Incorrect timing

– Fouled, shorted or improperly gapped plugs

2. Incorrect valve clearance

3. Leakage from intake and exhaust valves

4. Leakage from cylinders

Low

High

Rough idling

(Fluctuating HC reading)

1. Vacuum leaks:

– PCV hoses

– Intake manifold

– Throttle body

– Brake booster line

2. Lean mixture causing misfire

High

Rough idling

(Black smoke from exhaust)

1. Restricted air cleaner filter element

2. Plugged PCV valve

3. Faulty EFI systems:

– Faulty pressure regulator

– Faulty engine coolant temperature sensor

– Faulty mass air flow meter

–lty ECM

– Faulty injectors

– Throttle body

1NZ-FE ENGINE MECHANICAL – DRIVE BELT

EM–5

DRIVE BELT

COMPONENTS

ENGINE UNDER COVER RH

5.0 (51, 44 in.*lbf)

N*m (kgf*cm, ft.*lbf) : Specified torque

A115143E01

ENGINE

1NZ-FE ENGINE MECHANICAL

Plik z chomika:

Inne pliki z tego folderu:

Inne foldery tego chomika: