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Actron Digital Multimeter CP7676 manual

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Table of contents for the manual

  • Page 1

    Instrucciones en esp añol, páginas 37-72 1 CP7676 Digit al Multimeter OPERA TING INSTRUCTIONS Ignition System T esting .............................. 2 0 - Ignition Coil T esting .............................. 2 0 - Ignition System Wires .......................... 2 2 - Hall Effect Sensors/Switches .. ............ 2 3 - Magnetic Pick-Up Coils ...[...]

  • Page 2

    SAFETY GUIDELINES TO PREVENT ACCIDENTS THA T COULD RESUL T IN SERIOUS INJUR Y AND/OR DAMAGE TO YOUR VEHICLE OR TEST EQUIPMENT , CAREFULL Y FOLLOW THESE SAFETY RULES AND TEST PROCEDURES 2  Always wear approved eye protection.  Always operate the vehicle in a well ventilated area. Do not inhale exhaust gases  they are very poisonous!  Alw[...]

  • Page 3

    V ehicle Service Manual  Sources For Service Information The following is a list of sources to obtain vehicle service information for your specific vehicle.  Contact your local Automotive Dealership Parts Department.  Contact local retail auto parts stores for aftermarket vehicle service information.  Contact your local library . Librar[...]

  • Page 4

    8 CYL 4 CYL 5 CYL 6 CYL OF F 2K 200 200 750 20 2 20M 2M 200K 20K DC V AC V OHMS ® CP7676 RPM X10 750V AC 200V DC COM V 4 CYL 5 CYL DWELL 6 CYL 8 CYL 4 Section 1. Multimeter Basic Functions Digital multimeters or DMMs have many special features and functions. This section defines these features and functions, and explains how to use these functions[...]

  • Page 5

    5 Functions and Display Definitions (Refer to Digital Multimeter illustration on facing page) 1. RO T A R Y SWITCH Switch is rotated to turn multimeter ON/ OFF and select a function. 2. RPM X 10 This Function is used for measuring engine speed (RPM). 3. DWELL This Function is used for measuring DWELL on distributor ignition systems, and solenoids. [...]

  • Page 6

    4 CYL 5 CYL 6 CYL 8 CYL 2K 200 200 750 20 2 20M 2M 200K 20K DC V A C V OHMS ® CP7676 R P M X 1 0 750V AC 200V DC COM V D W ELL 4 CYL 5 CYL 6 CYL 8 CYL OFF 4 CYL 5 CYL 6 CYL 8 CYL 2K 200 200 750 20 2 20M 2M 200K 20K DC V A C V OHMS ® CP7676 R P M X 1 0 750V AC 200V DC COM V D W ELL 4 CYL 5 CYL 6 CYL 8 CYL OFF 4 CYL 5 CYL 6 CYL 8 CYL 2K 200 200 750[...]

  • Page 7

    4 CYL 5 CYL 6 CYL 8 CYL 2K 200 200 750 20 2 20M 2M 200K 20K DC V A C V OHMS ® CP7676 R P M X 1 0 750V AC 200V DC COM V D W E LL 4 CYL 5 CYL 6 CYL 8 CYL OFF 4 CYL 5 CYL 6 CYL 8 CYL 2K 200 200 750 20 2 20M 2M 200K 20K DC V A C V OHMS ® CP7676 R P M X 1 0 750V AC 200V DC COM V D W ELL 4 CYL 5 CYL 6 CYL 8 CYL OFF 4 CYL 5 CYL 6 CYL 8 CYL 2K 200 200 75[...]

  • Page 8

    2K 200 20M 2M 200K 20K OHMS 750V AC 200V DC COM V DWELL 4 CYL 5 CYL 6 CYL 8 CYL 4 CYL 5 CYL 6 CYL 8 CYL 2K 200 200 750 20 2 20M 2M 200K 20K DC V A C V OHMS ® CP7676 R P M X 10 750V AC 200V DC COM V D W ELL 4 CYL 5 CYL 6 CYL 8 CYL OFF 8 Measuring DC V olt age This multimeter can be used to measure DC voltages in the range from 0 to 200V . Y o u can[...]

  • Page 9

    2K 200 20M 2M 200K 20K OHMS 750V AC 200V DC COM V DWELL 4 CYL 5 CYL 6 CYL 8 CYL 9 5. Connect RED and BLACK test leads across component where you want to measure resistance. When making resistance measurements, polarity is not important. The test leads just have to be connected across the component. 6. T urn multimeter rotary switch to desired OHM r[...]

  • Page 10

    OFF 4 CYL 5 C YL 6 CYL 8 CYL OFF 2K 200 200 750 20 2 20M 2M 200K 20K DC V AC V OHMS R P M X 1 0 750V AC 200V DC COM V DWELL 4 CYL 5 CYL 6 CYL 8 CYL 10 Measuring Engine RPM (T ACH) The CP7676 has a RPM X 10 function for measuring engine speed or RPM. When using the RPM X 10 function, you must multiply the display reading by 10 to get actual RPM. If [...]

  • Page 11

    2K 200 20M 2M 200K 20K OHMS 750V AC 200V DC COM V DWELL 4 CYL 5 CYL 6 CYL 8 CYL Measuring Dwell Dwell measuring was extremely important on breaker point ignition systems of the past. It referred to the length of time, in degrees, that the breaker points remained closed, while the camshaft was rotating. T odays vehicles use electronic ignition an[...]

  • Page 12

    [...]

  • Page 13

    4 CYL 5 CYL 6 CYL 8 CYL OFF 2K 200 200 750 20 2 20M 2M 200K 20K DC V A C V OHMS R P M X 1 0 750V AC 200V DC COM V DWELL 4 CYL 5 CYL 6 CYL 8 CYL 2K 200 20M 2M 200K 20K OHMS 750V AC 200V DC COM V DWELL 4 CYL 5 CYL 6 CYL 8 CYL 13 Section 2. Automotive T esting The digital multimeter is a very useful tool for trouble-shooting automotive electrical syst[...]

  • Page 14

    V iew reading on display:  Switch is closed if display reading is less than 10 Ω .  Switch is open if display reading indicates an overrange condition. (see Setting the Range on page 6) 7. Operate switch. V iew reading on display:  Switch is closed if display reading is less than 10 Ω .  Switch is open if display reading indicates a[...]

  • Page 15

    4 CYL 5 CYL 6 CYL 8 CYL 2K 200 200 750 20 2 20M 2M 200K 20K DC V AC V OHMS R P M X 1 0 750V AC 200V DC COM V DWELL 4 CYL 5 CYL 6 CYL 8 CYL OFF 15 S t arting/Charging System T esting The starting system turns over the engine. It consists of the battery , starter motor, starter solenoid and/or relay , and associated wiring and connections. The [...]

  • Page 16

    4 CYL 5 C YL 6 C YL 8 C YL 2K 200 200 750 20 2 20M 2M 200K 20K DC V AC V OHMS R P M X 1 0 750V AC 200V DC COM V DWELL 4 CYL 5 CYL 6 CYL 8 CYL OFF 16 Cranking V olt age - Battery Load T est This test checks the battery to see if it is delivering enough voltage to the starter motor under cranking conditions. 4. Connect RED test lead to positive (+) t[...]

  • Page 17

    1 10 2 4 5 6 8 7 7 9 8 9 6 2 4 5 3 3 17 V olt age Drop s 5. T urn multimeter rotary switch to 200mV DC range. If multimeter overranges, turn multimeter rotary switch to the 2V DC range. (See Setting the Range on page 6) 6. Crank engine until steady reading is on display .  Record results at each point as displayed on multimeter .  Repeat S te[...]

  • Page 18

    4 CYL 5 C YL 6 CYL 8 CYL 2K 200 200 750 20 2 20M 2M 200K 20K DC V AC V OHMS R P M X 1 0 750V AC 200V DC COM V DWELL 4 CYL 5 CYL 6 CYL 8 CYL OFF 18 Charging System V olt age T est This test checks the charging system to see if it charges the battery and provides power to the rest of the vehicles electrical systems (lights, fan, radio etc). Fig. 19 7[...]

  • Page 19

    [...]

  • Page 20

    4 CYL 5 CYL 6 CYL 8 CYL 2K 200 200 750 20 2 20M 2M 200K 20K OHMS R P M X 1 0 750V AC 200V DC COM V DWELL 4 CYL 5 CYL 6 CYL 8 CYL 4 CYL 5 CYL 6 CYL 8 CYL 2K 200 200 750 20 2 20M 2M 200K 20K OHMS R P M X 1 0 750V AC 200V DC COM V DWELL 4 CYL 5 CYL 6 CYL 8 CYL 20 Ignition System T esting The ignition system is responsible for providing the spark that [...]

  • Page 21

    21 1 1. Move RED test lead to secondary ignition coil terminal.  Refer to vehicle service manual for location of secondary ignition coil terminal.  V erify BLACK test lead is connected to primary ignition coil negative (-) terminal. 12. View reading on display . 13. If vehicle is DIS, repeat Step s 1 1 and 12 for remaining ignition coils. 14.[...]

  • Page 22

    4 C YL 5 CYL 6 C YL 8 CYL 2K 200 200 750 20 2 20M 2M 200K 20K OHMS R P M X 1 0 750V AC 200V DC COM V DWELL 4 CYL 5 C YL 6 CYL 8 CYL 22 Ignition System Wires This test measures the resistance of spark plug and coil tower wires while they are being flexed. This test c an be used for distributorless ignition systems (DIS) provided the system does not [...]

  • Page 23

    9V 4 CYL 5 CYL 6 C YL 8 CYL 2K 200 200 750 20 2 20M 2M 200K 20K OHMS R P M X 1 0 750V AC 200V DC COM V DWELL 4 CYL 5 CYL 6 CYL 8 CYL 23 Hall Effect Sensors/Switches Hall Effect sensors are used whenever the vehicle computer needs to know speed and position of a rotating object. Hall Effect sensors are commonly used in ignition systems to determine [...]

  • Page 24

    4 CYL 5 CYL 6 CYL 8 CYL 2K 200 200 750 20 2 20M 2M 200K 20K OHMS R P M X 1 0 750V AC 200V DC COM V DWELL 4 CYL 5 CYL 6 CYL 8 CYL Magnetic Pick-Up Coils  Reluctance Sensors 24 Reluctance sensors are used whenever the vehicle computer needs to know speed and position of a rotating object. Reluctance sensors are commonly used in ignition systems to[...]

  • Page 25

    4 CYL 5 CYL 6 CYL 8 CYL 2K 200 200 750 20 2 20M 2M 200K 20K DC V AC V OHMS R P M X 1 0 750V AC 200V DC COM V DWELL 4 CYL 5 CYL 6 CYL 8 CYL OFF Ignition Coil Switching Ac ti on 25 This test checks to see if the negative terminal of the primary ignition coil is getting switched ON and OFF via the ignition module and camshaft / crankshaft position sen[...]

  • Page 26

    26 T esting GM C-3 Mixture Control Solenoid Dwell This solenoid is located in the carburetor . Its purpose is to maintain an air/fuel ratio of 14.7 to 1 in order to reduce emissions. This test checks to see if the solenoid dwell is varying. T est Description: This test is rather long and detailed. Refer to vehicle service manual for the complete te[...]

  • Page 27

    4 C YL 5 CYL 6 CYL 8 CYL 2K 200 200 750 20 2 20M 2M 200K 20K OHMS R P M X 1 0 750V AC 200V DC COM V DWELL 4 CYL 5 CYL 6 CYL 8 CYL 27 Measuring Fuel Injector Resistance Fuel injectors are similar to solenoids. They contain a coil that is switched ON and OFF by the vehicle computer . This test measures the resistance of this coil to make sure it is n[...]

  • Page 28

    4 C Y L 5 C Y L 6 C Y L 8 C Y L 2K 200 200 750 20 2 20M 2M 200K 20K OHM S RPM X10 750V AC 200V DC COM V DWELL 4 C Y L 5 C Y L 6 C Y L 8 C Y L 28 T esting Engine Sensors In the early 1980s, computer controls were installed in vehicles to meet Federal Government regulations for lower emissions and better fuel economy . T o do its job, a computer-c[...]

  • Page 29

    29  T urn multimeter rotary switch to 200 Ω range.  V iew reading on display .  Compare reading to manufacturer's specification in vehicle service manual.  Remove both test leads from sensor . 6. Connect BLACK test lead to sensor GROUND pin.  If sensor is 1-wire or 3-wire, then GROUND is sensor housing.  If sensor is 2-wire[...]

  • Page 30

    4 CYL 5 CYL 6 CYL 8 CYL 2K 200 200 750 20 2 20M 2M 200K 20K OHMS R P M X 1 0 750V AC 200V DC COM V DWELL 4 CYL 5 CYL 6 CYL 8 CYL T emperature T ype Sensors 30 Fig. 28 T est Procedure (see Fig. 28): 1. If engine is HOT let it COOL down before proceeding. Make sure all engine and transmission fluids are at outside air temperature before proceeding wi[...]

  • Page 31

    4 CYL 5 C YL 6 C YL 8 CYL 2K 200 200 750 20 2 20M 2M 200K 20K OHMS R P M X 1 0 750V AC 200V DC COM V DWELL 4 CYL 5 CYL 6 CYL 8 CYL 31 Position T ype Sensors Position sensors are potentiometers or a type of variable resistor . They are used by the computer to determine position and direction of movement of a mechanical device. T ypical position sens[...]

  • Page 32

    C B A 4 C Y L 5 C Y L 6 C Y L 8 C Y L 2K 200 200 750 20 2 20M 2M 200K 20K DC V AC V OHMS R P M X 10 750V AC 200V DC COM V DWELL 4 C Y L 5 C Y L 6 C Y L 8 C Y L 3 0 2 5 20 15 5 0 10 VACUUM PUMP OFF EGR Valve Position  Remove vacuum hose from EGR valve.  Connect hand vacuum pump to EGR valve.  Gradually apply vacuum to slowly open valve. (T [...]

  • Page 33

    33 3. Disconnect wiring harness and vacuum line from MAP sensor . 4. Connect jumper wire between Pin A on wiring harness and sensor . 5. Connect another jumper wire between Pin C on wiring harness and sensor . 6. Connect RED test lead to sensor Pin B. 7. Connect BLACK test lead to good vehicle ground. 8. Make sure test leads and jumper wires are no[...]

  • Page 34

    4 CYL 5 CYL 6 CYL 8 CYL 2K 200 200 750 20 2 20M 2M 200K 20K DC V AC V OHMS R P M X 1 0 750V AC 200V DC COM V DWELL 4 CYL 5 CYL 6 CYL 8 CYL FLOW OFF 34 Mass Air Flow (MAF) Sensors This sensor sends a signal to the computer indicating the amount of air entering the engine. Depending on the sensor design, the signal may be a dc voltage, low frequency [...]

  • Page 35

    35 8. Operate Sensor .  S tart engine and let idle.  Display reading should...  increase in volt age from Key On Engine OFF for DC type MAF sensors.  increase in RP M from Key On Engine OFF for Low Frequency type MAF sensors.  Rev Engine.  Display reading should...  increase in volt age from Idle for DC type MAF sensors.  in[...]

  • Page 36

    36[...]

  • Page 37

    OFF 8 CYL 4 CYL 5 CYL 6 CYL 2K 2 0 0 2 0 0 7 5 0 2 0 2 2 0 M 2 M 2 0 0 K 2 0 K D C V A C V OHMS ® C P 7676 RPM X10 7 5 0 V A C 2 0 0 V D C COM V 4 CYL 5 CYL DWELL 6 CYL 8 CYL 37 CP7676 Multímetro Digit al INSTRUCCIONES DE OPERACION Prueba del sistema de encendido ...................... 56 - Prueba de la bobina de encendi do ................. 56 -[...]

  • Page 38

    38 Toda la información, las ilustraciones y especificaciones en este manual están basadas en la información industrial más reciente disponible al momento de impresión. No se puede dar ninguna garantía (expresa o implícita) en cuanto a su exactitud o integridad, ni se responsabiliza Actron Manufacturing Co. ni ninguna persona conectada con Ac[...]

  • Page 39

    39 Manual de servicio del vehículo - Fuentes pa ra información de servicio A continuación aparece una lista de fuentes para la obtención de información de servicio del vehículo para su vehículo específico.  Consulte con su Departamento de Piezas del Concesionario Automotriz local.  Consulte con las tiendas minoristas de piezas automot[...]

  • Page 40

    8 CYL 4 CYL 5 CYL 6 CYL OF F 2K 200 200 750 20 2 20M 2M 200K 20K DC V AC V OHMS ® CP7676 RPM X10 750V AC 200V DC COM V 4 CYL 5 CYL DWELL 6 CYL 8 CYL Pinza abrazadera de adaptor Algunas pruebas de mediciónes y multimetro son más facil hacer cuando se usan pinzas en vez de pinchar . Para esta prueba, empuje y apriete el final de la pinza y la pinc[...]

  • Page 41

    41 Definiciones de funciones y de p antalla 1. INTERRUPTOR GIRA TOR IO El interruptor se gira para colocar el multímetro en ON/OFF y seleccionar una función. 2. RPM x 10 Es ta función se usa para medir la velocidad del motor (RPM). 3. INTERV ALO (DWELL) Es ta función se usa para medir el INTERV ALO en los sistemas de encendido del distribuidor [...]

  • Page 42

    4 CYL 5 CYL 6 CYL 8 CYL 2K 200 200 750 20 2 20M 2M 200K 20K DC V A C V OHMS ® CP7676 R P M X 1 0 750V AC 200V DC COM V D W ELL 4 CYL 5 CYL 6 CYL 8 CYL OFF 4 CYL 5 CYL 6 CYL 8 CYL 2K 200 200 750 20 2 20M 2M 200K 20K DC V A C V OHMS ® CP7676 R P M X 1 0 750V AC 200V DC COM V D W ELL 4 CYL 5 CYL 6 CYL 8 CYL OFF 4 CYL 5 CYL 6 CYL 8 CYL 2K 200 200 750[...]

  • Page 43

    4 CYL 5 CYL 6 CYL 8 CYL 2K 200 200 750 20 2 20M 2M 200K 20K DC V A C V OHMS ® CP7676 R P M X 1 0 750V AC 200V DC COM V D W E LL 4 CYL 5 CYL 6 CYL 8 CYL OFF 4 CYL 5 CYL 6 CYL 8 CYL 2K 200 200 750 20 2 20M 2M 200K 20K DC V A C V OHMS ® CP7676 R P M X 1 0 750V AC 200V DC COM V D W ELL 4 CYL 5 CYL 6 CYL 8 CYL OFF 4 CYL 5 CYL 6 CYL 8 CYL 2K 200 200 75[...]

  • Page 44

    2K 200 20M 2M 200K 20K OHMS 750V AC 200V DC COM V DWELL 4 CYL 5 CYL 6 CYL 8 CYL 4 CYL 5 CYL 6 CYL 8 CYL 2K 200 200 750 20 2 20M 2M 200K 20K DC V AC V OHMS ® CP7676 R P M X 1 0 750V AC 200V DC COM V DWELL 4 CYL 5 CYL 6 CYL 8 CYL OFF 44 5. Gire el interruptor giratorio del multímetro al intervalo deseado de voltaj e. Comience con el intervalo mayor[...]

  • Page 45

    45 3. Inserte la guía de prueba ROJA dentro de la clavija de guía de prueba V . 4. Gire el interruptor giratorio del multímetro al intervalo de 200ý. Junte las guías de prueba ROJA y NEGRA del multímetro y vea la lectura en la pantalla. Típicamente la pantalla debe leer 0,2ý a 1,5ý. Inspeccione ambos extremos de las guías de prueba por ma[...]

  • Page 46

    2K 200 20M 2M 200K 20K OHMS 750V AC 200V DC COM V DWELL 4 CYL 5 CYL 6 CYL 8 CYL 2K 200 20M 2M 200K 20K OHMS 750V AC 200V DC COM V DWELL 4 CYL 5 CYL 6 CYL 8 CYL 46 Pruebas de continuidad La continuidad es una prueba específica de resistencia para determinar si un circuito está abierto o cerrado. El multímetro mostrará la resistencia del circuito[...]

  • Page 47

    OFF 4 CYL 5 CYL 6 CYL 8 CYL OFF 2K 200 200 750 20 2 20M 2M 200K 20K DC V AC V OHMS R P M X 1 0 750V AC 200V DC COM V DWELL 4 CYL 5 CYL 6 CYL 8 CYL 47 6. Conecte las guías de prueba ROJA y NEGRA a través del diodo y vea la p antalla. La pantalla mostrará una de tres cosas:  Una caída típica de voltaje de 0,7V aproximadamente.  Una caída [...]

  • Page 48

    2K 200 20M 2M 200K 20K OHMS 750V AC 200V DC COM V DWELL 4 CYL 5 CYL 6 CYL 8 CYL 48 Medición del intervalo La medición del intervalo era extremadamente importante en los sistemas interruptores de los platinos de encendido. Se refería a la duración en grados que los platinos permanecían cerrados, mientras el árbol de levas giraba. Los vehículo[...]

  • Page 49

    2K 200 20M 2M 200K 20K OHMS 750V AC 200V DC COM V DWELL 4 CYL 5 CYL 6 CYL 8 CYL 4 CYL 5 CYL 6 CYL 8 CYL OFF 2K 200 200 750 20 2 20M 2M 200K 20K DC V A C V OHMS R P M X 1 0 750V AC 200V DC COM V DW ELL 4 CYL 5 CYL 6 CYL 8 CYL 49 Negro Sección 2. Pruebas a utomotores con el CP7676 El multímetro digital es una herramienta muy útil para localizar la[...]

  • Page 50

    2K 200 20M 2M 200K 20K OHMS 750V AC 200V DC COM V DWELL 4 CYL 5 CYL 6 CYL 8 CYL 50 6. Conecte la guía de prueba ROJA al otro lado del interruptor . V ea la lectura en la pantalla:  Si la lectura en la pantalla es menor que 10ý el interruptor está cerrado.  Si la lectura en la pantalla indica una condición de rango excesivo el interruptor [...]

  • Page 51

    4 CYL 5 CYL 6 CYL 8 CYL 2K 200 200 750 20 2 20M 2M 200K 20K DC V AC V OHMS R P M X 1 0 750V AC 200V DC COM V DWELL 4 CYL 5 CYL 6 CYL 8 CYL OFF 51 Prueba del sistema de arranque/carga El sistema de arranque rota el motor. Consiste de la batería, motor del arrancador, solenoide y/o relé del arrancador, y cableado y conexiones asociadas. El si[...]

  • Page 52

    4 CYL 5 CYL 6 C YL 8 CYL 2K 200 200 750 20 2 20M 2M 200K 20K DC V AC V OHMS R P M X 1 0 750V AC 200V DC COM V DWELL 4 C YL 5 CYL 6 CYL 8 CYL OFF 52 V oltaje de gir o (cuando intenta arrancar) - Prueba de carga de la batería Esta prueba inspecciona la batería para verificar si está entregando suficiente voltaje al arrancador del motor bajo condic[...]

  • Page 53

    1 10 2 4 5 6 8 7 7 9 8 9 6 2 4 5 3 3 53 Caídas de volt aje Esta prueba mide las caídas de voltaje a través de los conductores, interruptores, cables, solenoides y conexiones. Con esta prueba usted puede hallar resistencias excesivas en el sistema de arranque. Esta resistencia restringe la cantidad de corriente que alcanza el motor del arrancador[...]

  • Page 54

    4 CYL 5 CYL 6 C YL 8 C YL 2K 200 200 750 20 2 20M 2M 200K 20K DC V AC V OHMS R P M X 1 0 750V AC 200V DC COM V DWELL 4 CYL 5 CYL 6 CYL 8 CYL OFF 54 Fig. 19 Prueba de volt aje del sistema de carga Esta prueba inspecciona el sistema de carga para verificar si carga la batería y suministra potencia al resto de los sistemas eléctricos del sistema (lu[...]

  • Page 55

    55[...]

  • Page 56

    4 CYL 5 CYL 6 CYL 8 CYL 2K 200 200 750 20 2 20M 2M 200K 20K OHMS R P M X 1 0 750V AC 200V DC COM V DWELL 4 CYL 5 CYL 6 CYL 8 CYL 4 CYL 5 CYL 6 CYL 8 CYL 2K 200 200 750 20 2 20M 2M 200K 20K OHMS R P M X 1 0 750V AC 200V DC COM V DWELL 4 CYL 5 CYL 6 CYL 8 CYL 56 Fig. 21 Prueba del sistema de encendido El sistema de encendido es responsable por sumini[...]

  • Page 57

    57 9. Resultados de la prueba - Bobina primaria  El rango típico de la resistencia de las bobinas primarias de encendido es de 0,3-2,0ý.  Para el rango de resistencias de su vehículo, refiérase al manual de servicio del vehículo. 10. Gire el interruptor giratorio del multímetro al rango de 200Ký (vea Fig. 21). 1 1. Mueva la guía de pr[...]

  • Page 58

    4 C YL 5 CYL 6 CYL 8 CYL 2K 200 200 750 20 2 20M 2M 200K 20K OHMS R P M X 1 0 750V AC 200V DC COM V DWELL 4 C YL 5 CYL 6 C YL 8 CYL 58 Cables del sistema de encendido Esta prueba mide la resistencia de los cables de la bujía y de la torre de la bobina mientras se flexionan. Esta prueba puede usarse para los sistemas de encendido sin distribuidor ([...]

  • Page 59

    9V 4 CYL 5 CYL 6 CYL 8 CYL 2K 200 200 750 20 2 20M 2M 200K 20K OHMS R P M X 1 0 750V AC 200V DC COM V DWELL 4 CYL 5 CYL 6 CYL 8 CYL 59 Sensores/Interruptores del efecto Hall Los sensores del efecto Hall se usan siempre que la computadora del vehículo necesite saber la velocidad y posición de un objeto giratorio. Los sensores del efecto Hall se us[...]

  • Page 60

    4 CYL 5 CYL 6 CYL 8 CYL 2K 200 200 750 20 2 20M 2M 200K 20K OHMS R P M X 1 0 750V AC 200V DC COM V DWELL 4 CYL 5 CYL 6 CYL 8 CYL 60 Bobinas de toma magnética - Sensores de reluctancia Los sensores de reluctancia se usan siempre que la computadora del vehículo necesite sa- ber la velocidad y posición de un objeto giratorio. Los sensores de reluct[...]

  • Page 61

    4 CYL 5 CYL 6 CYL 8 CYL 2K 200 200 750 20 2 20M 2M 200K 20K DC V AC V OHMS R P M X 1 0 750V AC 200V DC COM V DWELL 4 CYL 5 CYL 6 CYL 8 CYL OFF 61 Acción conmut adora de la bobina de encendido Esta prueba inspecciona si el terminal negativo de la bobina primaria de encendido conmuta entre ON y OFF por vía del módulo de encendido y de los sensores[...]

  • Page 62

    62 Conexión típica del solenoide de control de mezcla Prueba del sistema de combustible Los requerimientos para emisiones menores del vehículo han incrementado la necesidad de un control más preciso del combustible del motor. Los fabricantes de automóviles comenzaron a usar carburadores controlados electrónicamente en 1980 para satisfacer los[...]

  • Page 63

    4 CYL 5 CYL 6 CYL 8 CYL 2K 200 200 750 20 2 20M 2M 200K 20K OHMS R P M X 1 0 750V AC 200V DC COM V DWELL 4 CYL 5 CYL 6 CYL 8 CYL 63 Medición de la resistencia del inyector de combustible Los inyectores de combustible son similares a los solenoides. Contienen una bobina que conmuta entre ON y OFF por la computadora del vehículo. Esta prueba mide l[...]

  • Page 64

    4 C Y L 5 C Y L 6 C Y L 8 C Y L 2K 200 200 750 20 2 20M 2M 200K 20K OHMS RPM X10 750V AC 200V DC COM V DWELL 4 C Y L 5 C Y L 6 C Y L 8 C Y L 64 Elemento plano expuesto Conductos Prueba de los sensores de motor A comienzos de los años 80 se instalaron controles de computadora en los vehículos para cumplir con las regulaciones del Gobierno Federal [...]

  • Page 65

    65  Conecte la guía de prueba ROJA a cualquiera de las clavijas del calentador .  Conecte la guía de prueba NEGRA a la clavija restante del calentador .  Gire el interruptor giratorio del multímetro al rango de 200ý.  V ea la lectura en la pant alla.  Compare la lectura con las especificaciones del fabricante en el manual de serv[...]

  • Page 66

    4 CYL 5 CYL 6 CYL 8 CYL 2K 200 200 750 20 2 20M 2M 200K 20K OHMS R P M X 1 0 750V AC 200V DC COM V DW ELL 4 CYL 5 CYL 6 CYL 8 CYL 66 Sensores de tipo de temperatura Un sensor de temperatura es un termistor o una resistor cuya resistencia cambia con la temperatura. Cuanto más se calienta el sen- sor más se reduce la resistencia. Las aplicaciones t[...]

  • Page 67

    4 CYL 5 CYL 6 CYL 8 CYL 2K 200 200 750 20 2 20M 2M 200K 20K OHMS R P M X 1 0 750V AC 200V DC COM V DWELL 4 CYL 5 CYL 6 CYL 8 CYL 67 Sensores de tipo de posición Los sensores de posición son potenciómetros o un tipo de resitores variables. Son usados por la computadora para determinar la posición y la dirección del movimiento de un mecanismo me[...]

  • Page 68

    C B A 4 C YL 5 C Y L 6 C Y L 8 C Y L 2K 200 200 750 20 2 20M 2M 200K 20K DC V AC V OHMS R P M X 10 750V AC 200V DC COM V DWELL 4 C YL 5 C Y L 6 C Y L 8 C Y L 3 0 2 5 2 0 15 5 0 1 0 VACUUM PUMP OFF 68  V ea Sensores de tipo de temperatura en la página 66 para probar el sensor de temperatura del aire de entrada. Posición de la válvula EGR  R[...]

  • Page 69

    69 3. Desconecte el arnés del cableado y la tubería de vacío del sensor MAP . 4. Conecte el cable de puente entre la clavija A en el arnés de cableado y el sensor . 5. Conecte otro cable de puente entre la clavija C en el arnés de cableado y el sensor . 6. Conecte la guía de prueba ROJA a la clavija B del sensor . 7. Conecte la guía de prueb[...]

  • Page 70

    4 C Y L 5 C Y L 6 C Y L 8 C Y L 2K 200 200 750 20 2 20M 2M 200K 20K DC V AC V OHMS R P M X 10 750V AC 200V DC COM V DWELL 4 C Y L 5 C Y L 6 C Y L 8 C Y L FLOW OFF 70 Fig. 31 Sensores de flujo de aire masivo (MAF) Este sensor envía una señal a la computadora indicando la cantidad de aire entrante en el motor. Dependiendo del diseño del motor, la [...]

  • Page 71

    71 {La ecuación es válida solamente para el multímetro en la posición de 4 Cilindros RPM X 10} 8. Opere el sensor  Arranque el motor y permita que funcione en vacío.  La lectura de la pant alla debe.. - aumentar en volt aje desde la llave en On Motor Off para los sensores MAF de tipo de CC. - aumentar en R PM desde la llave en ON Motor O[...]

  • Page 72

    FULL ONE (1) YEAR W ARRANTY SPX Corporation, 15825 Industrial Parkway , Cleveland, Ohio 44135, warrant s to the user that this unit will be free from defects in materials and workmanship for a period of one (1) year from the date of original purchase. Any unit that fails within this period will be rep aired without charge when returned to the Facto[...]