background image

figure 11

Red

Black

Spark plug

Diagnosis of automotive Troubles

9

H. Charging System Voltage Testing

This testing is used to see if the charging system

operates normally so as to provide the electronic

systems with adequate power (lamps, electric

fans, radio sets, etc.).
1. Set the rotary switch of the multimeter to the

    20VDC As prompted at the LCD connect

    terminal, insert the red test lead into the V

    terminal and the black one into the COM

    terminal.
2. Connect the black test lead probe to the

    negative pole of the battery and the red one to

    the positive pole of the battery.
3. Run the engine idle and close or turn off all the

    accessories with the normal voltage readings

    being 13.2 V to 15.2 v.
4. Open the throttle and control the rotation speed

    of the engine between 1800 RPM and 2800

    RPM. The voltage readings should be

    consistent with those in (3) (with the difference

    being no more than 0.5 V).
5. Turn on the lamps, windshield wipers, fans and

    so on to increase the loads of the electronic

    systems with the voltage readings being no less

    than 13.0 V.
6. If the readings in Steps 3., 4. and 5. are normal, 

    the charging system is also normal. If the

    readings in Steps 3., 4. and 5. are beyond the

     limits or inconsistent with those in the operation

    manual, check the current ranges of the

    conveying belt, regulator, AC generator, 

    connector and open-circuit AC generator. If any

    further diagnosis is required, refer to various

    kinds of automotive manuals.

I. Ignition System Testing
1. Ignition Coil Testing

(1) Before the operation, cool the engine and cut

     off the ignition coil.
(2) Set the rotary switch of the meter to the 200

.   

     As prompted at the LCD connect terminal,

     insert the red test lead into the 

 terminal and

     the black one into the COM terminal. Test the

     primary coil of the ignition coil.
(3) Short circuit the red and black test lead probes.

      Their short circuit resistance should be less

      than 0.5

. If it is more, check the test lead to

      see if it is loose or damaged. If it is damaged,

      replace it with a new one.
(4) Connect the red test lead probe to the primary

     “+” pole of the ignition coil and the black one

      to the primary “-” pole of the coil. (see figure

     10.) See the detailed positions in various kinds

     of automotive manuals.

(5) Set the rotary switch to the 200k

 and test

     the secondary coil of the ignition coil.
(6) Connect the red test lead probe to the

     secondary outlet and the black one to the

     primary “-” pole. Refer to various kinds of

     automotive manuals for the details.
(7) The secondary resistance is generally in a

     range of 6 k

 to 30 k

. Refer to various kinds

     of automotive manuals for the details.
(8) For a heater ignition coil, repeat the said testing

     steps.
Note:
For a heater ignition coil, the resistance may be

a little higher because the resistance of a coil will

vary with the temperatures. The higher the

temperature, the higher the resistance will be and

vice versa.

          • The reading of the testing becomes the

actual tested resistance only after the reduction of

the shortcircuit values of the test leads.

          • Some of Chrysler’s products use a spark

plug high voltage damper with “positive lock” end

electrodes, which can only be moved out of the

distributor board. If it is moved out of anywhere

else, some damage will result. Refer to various

kinds of automotive manuals for the details.

• The primary resistance is generally between

   0.3

 and 2.0

.

(2) Set the rotary switch of the meter to the 200 k

.

      As prompted at the LCD connect terminal, insert

     the red test lead into the 

 terminal and the

     black one into the COM terminal.

WARNING

WARNING

figure 10

Cylindrical Ignition Coil

Primary

Coil

Secondary

Coil

Black

Red

2. Ignition System High-Voltage Damper Testing

    (see figure 11)

(1) Move the connectors of the ignition system

     from the engine. Refer to the ignition system

     movement procedure in various kinds of

     automotive manuals for the details.

Содержание KN 8056

Страница 1: ...KN 8056 Digital automotive multimeter Mult metro digital automotriz...

Страница 2: ...tion than other multimeters In addition to the automotive dwell and tach rotation speed this multimeter can be used to test the AC voltage DC voltage DC current resistance diode and continuity Table o...

Страница 3: ...r from corrosion damage and accident Turn off the multimeter when it is not in use and take out the battery when not using for a long time Constantly check the battery as it may leak when it has been...

Страница 4: ...ge of any terminal crack on any spark plug or breakage at the insulation of the ignition lead 6 Check all the vacuum hoses any right line shrinkage bend crack fracture or damage 7 Check the leads any...

Страница 5: ...multimeter may be damaged or the operator himself may be hurt Use proper terminals function and range for the measurement When the testing leads are connected to the current terminals do not parallel...

Страница 6: ...e open circuit voltage between terminals and ground is greater than 60V DC or 30V AC rms The resistance ranges are 200 0 2 000k 20 00k 200 0k 2 000M and 20 00M To measure resistance connect the multim...

Страница 7: ...s disconnected The buzzer sounds continuously when the resistance value is 30W The circuit is in good condition Note The LCD displays 1 indicating the circuit being tested is open Open circuit voltage...

Страница 8: ...test leads to see whether they are well connected 4 Connect the red and black test lead probes in parallel to the two ends of the fuse when the reading of the multimeter should be displayed H Data Hol...

Страница 9: ...lowing pairs of points respectively 1 2 2 3 4 5 5 6 6 7 7 8 8 9 8 10 4 Read the reading of the tested current directly from the display with the normal current being about 100 mA For the special suppl...

Страница 10: ...black test lead probes Their short circuit resistance should be less than 0 5 If it is more check the test lead to see if it is loose or damaged If it is damaged replace it with a new one 4 Connect t...

Страница 11: ...el tape etc is inserted into a concave magnetic pole of the sensor the display of the meter will be enlarged or overloaded if the metal plate is moved away the display will become smaller which proves...

Страница 12: ...Testing see figure 16 figure 15 Black Red Fuel injector figure 16 Long Fuel Short Fuel Black Ground Red If the sensor has a 1 or 3 lead outlet the ground terminal is its shell If the sensor has a 2 o...

Страница 13: ...nsor In a vacuum state the displayed value is generally between 3 V and 5 V The details shall be based on the parameters furnished by the supplier Frequency Type Sensor In a vacuum state the displayed...

Страница 14: ...Input impedance 10M Frequency RPM 30 This only applies to 4CYL General Specifications Maximum Voltage between any Terminals and grounding Refer to different range input protection voltage Accurate Spe...

Страница 15: ...detergent as dirt or moisture in the terminals can affect readings Turn the Meter off when it is not in use and take out the battery when not using for a long time Do not store the Meter in a place o...

Страница 16: ...ing of a fuse always results from improper operation To replace the multimeter s battery 1 Turn the multimeter power off and remove all connections from the terminals 2 Take the multimeter out from th...

Страница 17: ...riente CD resistencia diodo y continuidad Tabla de contenidos G Prueba de ca da de tensi n 24 H Prueba de tensi n del sistema de carga 24 I Prueba del sistema de encendido 25 1 Prueba de la bobina de...

Страница 18: ...e realice el mantenimiento No deben utilizarse sustancias abrasivas ni solventes para evitar da os accidentes y corrosi n en la superficie del mult metro Apague el mult metro cuando no est en uso y sa...

Страница 19: ...ncendido posibles roturas en las terminales grietas en las buj as o roturas en el aislamiento del cable de encendido 6 Revise todas las mangueras de vac o cualquier l nea recta contracci n curvas grie...

Страница 20: ...por favor no intente medir tensiones superiores a 1000 Vp aunque puedan obtenerse dichas lecturas figura 3 ADVERTENCIA Los rangos de voltaje de CD son 200 0 mV 2 000 V 20 00 V 200 0 V y 1000 V Los ran...

Страница 21: ...de m s de 15 minutos C Prueba de resistencia ver Figura 5 Para evitar da os al mult metro o en los dispositivos sometidos a prueba desconecte la alimentaci n del circuito y descargue todos los capacit...

Страница 22: ...mponente y coloque la punta de prueba negro en el c todo del componente El valor medido se muestra en la pantalla Nota En un circuito un diodo en buen estado debe producir una lectura de ca da de tens...

Страница 23: ...de prueba roja al extremo negativo primario de la bobina de encendido Consulte el manual de mantenimiento del autom vil para conocer la posici n espec fica 3 Conecte la punta de cable de prueba negro...

Страница 24: ...motor est apagado consulte el manual de mantenimiento automotriz Si surge cualquier corriente adicional efect e el mantenimiento necesario F Prueba de carga de la bater a activador de voltaje Cuando a...

Страница 25: ...Pruebe la tensi n entre cualquiera de los siguientes pares de puntos respectivamente 1 y 2 2 y 3 4 y 5 5 y 6 6 y 7 7 y 8 8 y 9 8 y 10 Compare las lecturas de las tensiones probadas con las de la tabl...

Страница 26: ...oco mayor porque la resistencia de una bobina var a con la temperatura Cuanto m s elevada la temperatura mayor ser la resistencia y viceversa 1 Mueva los conectores del sistema de encendido del motor...

Страница 27: ...a los de un sensor Hall y los m todos de prueba de ambos sensores tambi n son similares Su resistencia normal se encuentra generalmente en un rango de entre 150 a 1 k Consulte los rangos de resistenc...

Страница 28: ...iza en el autom vil es un sensor de ox geno de calor que tiene 2 extremos calientes Consulte las posiciones de los extremos calientes en varios tipos de manuales automotrices En este momento conecte l...

Страница 29: ...ierra Pie de vac o Teminal de se al V 2 Conecte los sensores de las puntas de prueba roja y negra respectivamente a la terminal de prueba de se ales y a la terminal conectado a tierra Consulte diverso...

Страница 30: ...ultiplica por 10 Frecuencia R P M 30 Esto s lo se aplica a 4CYL La lectura se convierte en R P M reales s lo despu s que se multiplica por 10 Frecuencia R P M 30 Esto s lo se aplica a 4CYL Valores vis...

Страница 31: ...e sobrecarga 1000 VCD or 750 VCA continuos Observaciones A un rango de 10 A Para medici n continua 10 segundos y el intervalo de tiempo entre 2 mediciones mayores a 15 minutos C Corriente CD D Resiste...

Страница 32: ...l mult metro use NICAMENTE fusibles espec ficos para el procedimiento siguiente Para reemplazar el fusible del mult metro 1 Apague el mult metro y retire todas las conexiones de las terminales 2 Retir...

Страница 33: ...Notes Notas...

Страница 34: ...www knova com mx...

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