1982-on Honda Cub/Passport with CDI Ignition 1982-on Honda Cub/Passport with CDI Ignition: the Tests

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  • 1982-on Honda Cub/Passport with CDI Ignition: Tests in the Honda Manual - a How To

    by Jon Pardue Sarasota, Florida USA

    Here's the page from the factory Honda manual that explains how to test the CDI components. It instructs the reader to use either a Sanwa or Kowa electrical tester, which virtually no one has.

    The various tests are described in "truth tables". These can be hard to interpret.

    This How-To illustrates making each test using a commonly available electrical multitester.

    if its this good its from the labs and workshop of jon pardue

  • 1982-on Honda Cub/Passport with CDI Ignition: The Tester

    by Jon Pardue Sarasota, Florida USA

    Black/Red (MAGNETO COIL) Black/White

    (KILL SWITCH)

    Green (GROUND WIRE)

    cdi module

    OHMS

    COM

    CEN-TECH

    DIGITAL MULTIMETER

    V mAW

    2000

    OFF ON

    002

    Jon Pardue November 6 2007

    The multimeter illustrated is available at Harbor Freight. Radio Shack, Wal Mart and auto parts stores also have inexpensive multimeters.

    Here we are setting up the meter according to the tests Honda expects us to run. The meter's internal battery sends power through the probes and measures the resistance of the probes, wires, and the circuit being tested.

    This basic test verifies the meter is working properly. This simple test shows the meter probes and wires have 2 Ohms of resistance. Your meter may read Zero Ohms or a few Ohms. These low cost meters may display varying readings during this test.

    Meter set to check resistance.

    The maximum resistance reading possible at this setting is 2,000 Ohms.

    Honda's tests for the CDI and Ignition Coil range from almost Zero Ohms to 800 Ohms.

    if its this good its from the labs and workshop of jon pardue

    Shop Note: Zero Ohms is a short circuit. A solid wire measures close to Zero Ohms. Insulation is an open circuit. An open circuit = INFINITY on a meter

  • ignition coil

    AC from exciter coil

    groundpulse coil

    kill switch

    100-2000

    100-2000

    1982-on Honda Cub/Passport with CDI Ignition: the Tests

    by Jon Pardue Sarasota, Florida USA

    The yellow box explains what the CDI unit is connected to on your bike. The dotted red box is the truth table. We will run the tests from left to right, top to bottom. The dotted blue box has the tests for the exciter and pulse coils on the engine.

    if its this good its from the labs and workshop of jon pardue

  • IGN EXT

    PC E

    SW

    cdi unit

    1982-on Honda Cub/Passport with CDI Ignition: + to EXTTest One: - to SW = Infinity

    by Jon Pardue Sarasota, Florida USA

    Black/Red (MAGNETO COIL) Black/White

    (KILL SWITCH)

    Green (GROUND WIRE)

    cdi module

    COM

    CEN-TECH

    DIGITAL MULTIMETER

    V mAW

    2000

    OFF ON

    1

    Jon Pardue November 6 2007

    Meter should read INFINITY. This means no connection

    between the test points.

    This Cen-Tech meter displays a 1 to the far left, indicating infinite, or extremely high resistance.

    if its this good its from the labs and workshop of jon pardue

    OHMS

  • IGN EXT

    PC E

    SW

    1982-on Honda Cub/Passport with CDI Ignition: + to PCTest Two: - to SW = Infinity

    by Jon Pardue Sarasota, Florida USA

    Black/Red (MAGNETO COIL) Black/White

    (KILL SWITCH)

    Green (GROUND WIRE)

    cdi module

    COM

    CEN-TECH

    DIGITAL MULTIMETER

    V mAW

    2000

    OFF ON

    1

    Jon Pardue November 6 2007

    Meter should read INFINITY. This means no

    between the test points.

    This Cen-Tech meter displays a 1 to the far left, indicating

    .

    connection

    infinite, or extremely high resistance

    cdi unit

    if its this good its from the labs and workshop of jon pardue

    OHMS

  • IGN EXT

    PC E

    SW

    1982-on Honda Cub/Passport with CDI Ignition: + to ETest Three: - to SW = Infinity

    by Jon Pardue Sarasota, Florida USA

    Black/Red (MAGNETO COIL) Black/White

    (KILL SWITCH)

    Green (GROUND WIRE)

    cdi module

    COM

    CEN-TECH

    DIGITAL MULTIMETER

    V mAW

    2000

    OFF ON

    1

    Jon Pardue November 6 2007

    Meter should read INFINITY. This means no

    between the test points.

    This Cen-Tech meter displays a 1 to the far left, indicating

    .

    connection

    infinite, or extremely high resistance

    cdi unit

    if its this good its from the labs and workshop of jon pardue

    OHMS

  • IGN EXT

    PC E

    SW

    1982-on Honda Cub/Passport with CDI Ignition: + to IGNTest Four: - to SW = Infinity

    by Jon Pardue Sarasota, Florida USA

    Black/Red (MAGNETO COIL) Black/White

    (KILL SWITCH)

    Green (GROUND WIRE)

    cdi module

    COM

    CEN-TECH

    DIGITAL MULTIMETER

    V mAW

    2000

    OFF ON

    1

    Jon Pardue November 6 2007

    Meter should read INFINITY. This means no

    between the test points.

    This Cen-Tech meter displays a 1 to the far left, indicating

    .

    connection

    infinite, or extremely high resistance

    cdi unit

    if its this good its from the labs and workshop of jon pardue

    OHMS

  • IGN EXT

    PC E

    SW

    1982-on Honda Cub/Passport with CDI Ignition: + to SWTest Five: - to EXT = .01 Ohms to 20 Ohms

    by Jon Pardue Sarasota, Florida USA

    Black/Red (MAGNETO COIL) Black/White

    (KILL SWITCH)

    Green (GROUND WIRE)

    cdi module

    COM

    CEN-TECH

    DIGITAL MULTIMETER

    V mAW

    2000

    OFF ON

    14

    Jon Pardue November 6 2007

    Meter should read between 0.1 Ohms and 20 Ohms. This means there is resistance

    between the test points.

    This Cen-Tech meter displays a 14 to the right, indicating a resistance

    value within the "good" range.

    cdi unit

    Shop Note: 14 Ohms is almost a short circuit.

    if its this good its from the labs and workshop of jon pardue

    OHMS

  • IGN EXT

    PC E

    SW

    1982-on Honda Cub/Passport with CDI Ignition: + to PCTest Six: - to EXT = INFINITY

    by Jon Pardue Sarasota, Florida USA

    Black/Red (MAGNETO COIL) Black/White

    (KILL SWITCH)

    Green (GROUND WIRE)

    cdi module

    COM

    CEN-TECH

    DIGITAL MULTIMETER

    V mAW

    2000

    OFF ON

    Jon Pardue November 6 2007

    cdi unit

    Meter should read INFINITY. This means no

    between the test points.

    This Cen-Tech meter displays a 1 to the far left, indicating

    .

    connection

    infinite, or extremely high resistance

    1

    if its this good its from the labs and workshop of jon pardue

    OHMS

  • IGN EXT

    PC E

    SW

    1982-on Honda Cub/Passport with CDI Ignition: + to ETest Seven: - to EXT = INFINITY

    by Jon Pardue Sarasota, Florida USA

    Black/Red (MAGNETO COIL) Black/White

    (KILL SWITCH)

    Green (GROUND WIRE)

    cdi module

    COM

    CEN-TECH

    DIGITAL MULTIMETER

    V mAW

    2000

    OFF ON

    Jon Pardue November 6 2007

    cdi unit

    Meter should read INFINITY. This means no

    between the test points.

    This Cen-Tech meter displays a 1 to the far left, indicating

    .

    connection

    infinite, or extremely high resistance

    1

    if its this good its from the labs and workshop of jon pardue

    OHMS

  • IGN EXT

    PC E

    SW

    1982-on Honda Cub/Passport with CDI Ignition: + to IGNTest Eight: - to EXT = INFINITY

    by Jon Pardue Sarasota, Florida USA

    Black/Red (MAGNETO COIL) Black/White

    (KILL SWITCH)

    Green (GROUND WIRE)

    cdi module

    COM

    CEN-TECH

    DIGITAL MULTIMETER

    V mAW

    2000

    OFF ON

    Jon Pardue November 6 2007

    cdi unit

    Meter should read INFINITY. This means no

    between the test points.

    This Cen-Tech meter displays a 1 to the far left, indicating

    .

    connection

    infinite, or extremely high resistance

    1

    if its this good its from the labs and workshop of jon pardue

    OHMS

  • IGN EXT

    PC E

    SW

    1982-on Honda Cub/Passport with CDI Ignition: + to SWTest Nine: - to PC = 40 Ohms to 100 Ohms

    by Jon Pardue Sarasota, Florida USA

    Black/Red (MAGNETO COIL) Black/White

    (KILL SWITCH)

    Green (GROUND WIRE)

    cdi module

    COM

    CEN-TECH

    DIGITAL MULTIMETER

    V mAW

    2000

    OFF ON

    Jon Pardue November 6 2007

    cdi unit Meter should read between 40 Ohms and 100 Ohms.

    This means there is resistance between the test points.

    This Cen-Tech meter displays a 76 to the right, indicating a resistance

    value within the "good" range.

    76

    if its this good its from the labs and workshop of jon pardue

    OHMS

  • IGN EXT

    PC E

    SW

    1982-on Honda Cub/Passport with CDI Ignition: + to EXTTest Ten: - to PC = 20 Ohms to 800 Ohms

    by Jon Pardue Sarasota, Florida USA

    Black/Red (MAGNETO COI

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