velas e bobina do motor sigma carnival

8/17/2019 Velas e Bobina Do Motor Sigma Carnival

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TSB: Engine 022 (Rev) May 2006

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3. Using a fine copper or brass wire brush,

carefully remove carbon or any deposits from

terminal and electrodes. Carbon or any other

deposits MUST be removed before

performing resistance check.

Note: Be careful not to damage or crack

center Electrode Insulator.

4. Spark plug at must be at room temperature

(about 68 degrees F.). Using an ohmmeter place one lead on the spark plug terminal and

the other lead on the center electrode.

5. Check resistance reading with the chart below.

SUBJECT:

SIGMA 3.5 ENGINE SPARK PLUG & IGNITION COIL INSPECTION PROCEDURE

Ohmmeter

Resistor

Electrodes

Gasket

Center Electrode Resistance Check

Insulator

Terminal

.

.




6. Place the ohmmeter leads on the center

electrode and the spark plug thread area.

Note: When measuring resistance in M Ωrange DO NOT allow hand to come

in contact with leads.

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SUBJECT:

SIGMA 3.5 ENGINE SPARK PLUG & IGNITION COIL

7. Check resistance reading with the chart below.

SPARK PLUG GROUND ELECTRODE

GAP CHECK:

1. With spark plug removed, insert wire feeler gauge between spark plug electrodes.

Adjust air gap or replace, as necessary

according to the chart below.

Insulation Resistance Check

Spark Plug Gap Check

.

.

Ohmmeter



IGNITION COIL INSPECTION:

1. Visual Inspection

• Visually inspect the rubber cap for white

discoloration in the area circled. If white

discoloration is present it is an indicationthat there is a pinhole in the rubber

allowing the spark voltage to leak through

the insulation to ground.


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SPARK PLUG GASKET THICKNESS

CHECK:

1. Check spark plug gasket for damage or distortion. If gasket is damaged or distorted

replace gasket. Replace spark plug if

gasket is non-removable.

2. Check spark plug gasket thickness with

calipers per table below.

3. When installing spark plugs;

• Use a very small amount of anti-seize

compound on the spark plug threads.

Note: Use non-metallic anti-seizecompound.

• Torque the spark plugs to specifications

as listed in the chart below.

SUBJECT:


OK Replace

WhiteDiscoloration

No Yes

Ignition Coil Inspection Chart

Spark Plug Gasket Thickness Table and Torque Specification

Check for

Discoloration

Here




Terminal 1 and (+)Terminal Terminal 3 and (+)Terminal 2

Connection Continuity(approx. 0.78 )

Disconnection No Continuity

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SUBJECT:


2. Measure Primary Coil Resistance

• Measure Primary coil resistance using an

ohmmeter.

• Place the leads of the ohmmeter on the

terminals as shown in the illustration C.

• Check the resistance (if there is current)

between terminal 3 and 2 when

connecting / disconnecting terminal 1 and

terminal (+) after connecting (-) terminal

of 5V power to terminal 2 of the power

transistor.

3. Measure Secondary Coil Resistance

• Measure the secondary coil resistance

using an ohmmeter.

• Place the leads of the ohmmeter on the

terminals as shown in the illustration D.

4. If ignition coil passes inspection checks 1-3

of the Ignition Coil Inspection, the coil is

good and must be reused.

OK Replace

ResistanceValue

10.4 ~ 15.6 KBelow 10.4 Kor over 15.6 K

Primary Coil Resistance

Secondary Coil Resistance

C

D

Ω

Replace the coil if there is a malfunction.

ΩΩ

Ω

velas e bobina do motor sigma carnival

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