1982-on Honda Cub/Passport with CDI Ignition:Tests in the Honda Manual - a How To
by Jon PardueSarasota, 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 PardueSarasota, Florida USA
Black/Red(MAGNETO COIL) Black/White
(KILL SWITCH)
Green(GROUND WIRE)
cdimodule
OHMS
COM
CEN-TECH
DIGITALMULTIMETER
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 Hondaexpects us to run. The meter's internal battery sends power throughthe probes and measures the resistance of the probes, wires, andthe circuit being tested.
This basic test verifies the meter is working properly. This simpletest shows the meter probes and wires have 2 Ohms of resistance.Your meter may read Zero Ohms or a few Ohms. These low costmeters may display varying readings during this test.
Meter set tocheck resistance.
The maximum resistance readingpossible at this setting is 2,000 Ohms.
Honda's tests for theCDI and Ignition Coil range fromalmost 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 fromexciter coil
groundpulse coil
kill switch
100-2000
100-2000
1982-on Honda Cub/Passport with CDI Ignition:the Tests
by Jon PardueSarasota, 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 PardueSarasota, Florida USA
Black/Red(MAGNETO COIL) Black/White
(KILL SWITCH)
Green(GROUND WIRE)
cdimodule
COM
CEN-TECH
DIGITALMULTIMETER
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 1to 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 PardueSarasota, Florida USA
Black/Red(MAGNETO COIL) Black/White
(KILL SWITCH)
Green(GROUND WIRE)
cdimodule
COM
CEN-TECH
DIGITALMULTIMETER
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 1to 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 PardueSarasota, Florida USA
Black/Red(MAGNETO COIL) Black/White
(KILL SWITCH)
Green(GROUND WIRE)
cdimodule
COM
CEN-TECH
DIGITALMULTIMETER
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 1to 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 PardueSarasota, Florida USA
Black/Red(MAGNETO COIL) Black/White
(KILL SWITCH)
Green(GROUND WIRE)
cdimodule
COM
CEN-TECH
DIGITALMULTIMETER
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 1to 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 PardueSarasota, Florida USA
Black/Red(MAGNETO COIL) Black/White
(KILL SWITCH)
Green(GROUND WIRE)
cdimodule
COM
CEN-TECH
DIGITALMULTIMETER
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 14to 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 PardueSarasota, Florida USA
Black/Red(MAGNETO COIL) Black/White
(KILL SWITCH)
Green(GROUND WIRE)
cdimodule
COM
CEN-TECH
DIGITALMULTIMETER
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 1to 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 PardueSarasota, Florida USA
Black/Red(MAGNETO COIL) Black/White
(KILL SWITCH)
Green(GROUND WIRE)
cdimodule
COM
CEN-TECH
DIGITALMULTIMETER
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 1to 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 PardueSarasota, Florida USA
Black/Red(MAGNETO COIL) Black/White
(KILL SWITCH)
Green(GROUND WIRE)
cdimodule
COM
CEN-TECH
DIGITALMULTIMETER
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 1to 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 PardueSarasota, Florida USA
Black/Red(MAGNETO COIL) Black/White
(KILL SWITCH)
Green(GROUND WIRE)
cdimodule
COM
CEN-TECH
DIGITALMULTIMETER
V mAW
2000
OFF ON
Jon Pardue November 6 2007
cdi unitMeter should read between 40 Ohms and 100 Ohms.
This means there is resistancebetween the test points.
This Cen-Tech meter displays a 76to 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 PardueSarasota, Florida USA
Black/Red(MAGNETO COIL) Black/White
(KILL SWITCH)
Green(GROUND WIRE)
cdimodule
COM
CEN-TECH
DIGITALMULTIMETER
V mAW
2000
OFF ON
Jon Pardue November 6 2007
cdi unitMeter should read between 20 Ohms and 800 Ohms.
This means there is resistancebetween the test points.
This Cen-Tech meter displays a 122to the right, indicating a resistance
value within the "good" range.
122
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 Eleven: - to PC = 10 Ohms to 600 Ohms
by Jon PardueSarasota, Florida USA
Black/Red(MAGNETO COIL) Black/White
(KILL SWITCH)
Green(GROUND WIRE)
cdimodule
COM
CEN-TECH
DIGITALMULTIMETER
V mAW
2000
OFF ON
Jon Pardue November 6 2007
cdi unitMeter should read between 10 Ohms and 600 Ohms.
This means there is resistancebetween the test points.
This Cen-Tech meter displays a 392to the right, indicating a resistance
value within the "good" range.
392
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 Twelve: - to PC = INFINITY
by Jon PardueSarasota, Florida USA
Black/Red(MAGNETO COIL) Black/White
(KILL SWITCH)
Green(GROUND WIRE)
cdimodule
COM
CEN-TECH
DIGITALMULTIMETER
V mAW
2000
OFF ON
Jon Pardue November 6 2007
cdi unit
1
Meter should read INFINITY.This means no
between the test points.
This Cen-Tech meter displays a 1to the far left, indicating
.
connection
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 SWTest Thirteen: - to E = 1 Ohm to 50 Ohms
by Jon PardueSarasota, Florida USA
Black/Red(MAGNETO COIL) Black/White
(KILL SWITCH)
Green(GROUND WIRE)
cdimodule
COM
CEN-TECH
DIGITALMULTIMETER
V mAW
2000
OFF ON
Jon Pardue November 6 2007
cdi unit
30
Meter should read between 1 Ohm and 50 Ohms.This means there is resistance
between the test points.
This Cen-Tech meter displays a 30to the right, indicating a resistance
value within the "good" range.
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 Fourteen: - to E = .1 Ohm to 20 Ohms
by Jon PardueSarasota, Florida USA
Black/Red(MAGNETO COIL) Black/White
(KILL SWITCH)
Green(GROUND WIRE)
cdimodule
COM
CEN-TECH
DIGITALMULTIMETER
V mAW
2000
OFF ON
Jon Pardue November 6 2007
cdi unit
00.8
Meter should read between .1 Ohm and 20 Ohms.This means there is resistance
between the test points.
This Cen-Tech meter displays a 00.8to the right, indicating a resistance
value within the "good" range.
Shop Note:00.8 Ohms is basically a short circuit.See the decimal? That is 8/10 of one Ohm
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 Fifteen: - to E = 30 Ohm to 500 Ohms
by Jon PardueSarasota, Florida USA
cdi unit
Black/Red(MAGNETO COIL) Black/White
(KILL SWITCH)
Green(GROUND WIRE)
cdimodule
COM
CEN-TECH
DIGITALMULTIMETER
V mAW
2000
OFF ON
Jon Pardue November 6 2007
441
Meter should read between 30 Ohm and 500 Ohms.This means there is resistance
between the test points.
This Cen-Tech meter displays a 441to the right, indicating a resistance
value within the "good" range.
IGN EXT
PC E
SWBlack/Red(MAGNETO COIL) Black/White
(KILL SWITCH)
Green(GROUND WIRE)
cdimodule
COM
V mAW
2000
OFF ON
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 Sixteen: - to E = INFINITY
by Jon PardueSarasota, Florida USA
Black/Red(MAGNETO COIL) Black/White
(KILL SWITCH)
Green(GROUND WIRE)
cdimodule
COM
CEN-TECH
DIGITALMULTIMETER
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 1to 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 Seventeen: - to IGN = INFINITY
by Jon PardueSarasota, Florida USA
Black/Red(MAGNETO COIL) Black/White
(KILL SWITCH)
Green(GROUND WIRE)
cdimodule
COM
CEN-TECH
DIGITALMULTIMETER
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 1to 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 EXTTest Eighteen: - to IGN = INFINITY
by Jon PardueSarasota, Florida USA
Black/Red(MAGNETO COIL) Black/White
(KILL SWITCH)
Green(GROUND WIRE)
cdimodule
COM
CEN-TECH
DIGITALMULTIMETER
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 1to 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 PCTest Nineteen: - to IGN = INFINITY
by Jon PardueSarasota, Florida USA
Black/Red(MAGNETO COIL) Black/White
(KILL SWITCH)
Green(GROUND WIRE)
cdimodule
COM
CEN-TECH
DIGITALMULTIMETER
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 1to 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 Twenty: - to IGN = INFINITY
by Jon PardueSarasota, Florida USA
Black/Red(MAGNETO COIL) Black/White
(KILL SWITCH)
Green(GROUND WIRE)
cdimodule
COM
CEN-TECH
DIGITALMULTIMETER
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 1to 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
1982-on Honda Cub/Passport with CDI Ignition:+ to /RedExciter Coil Test: Black - to Ground = 150 Ohms to 700 Ohms
by Jon PardueSarasota, Florida USA
DCA
Black/Red(MAGNETO COIL) Black/White
(KILL SWITCH)
Green(GROUND WIRE)
cdimodule
COM
CEN-TECH
DIGITALMULTIMETER
V mAW
2000
OFF ON
Jon Pardue November 6 2007
198
Engine Block/Ground
Black/Red from Engine
Meter should read between 150 Ohm and 700 Ohms.This means there is resistance
between the test points.
This Cen-Tech meter displays a 198to the right, indicating a resistance
value within the "good" range.
if its this good its from the labs and workshop of jon pardue
OHMS
1982-on Honda Cub/Passport with CDI Ignition:+ toPulse Generator Test: Blue/White - to = 50 Ohms to 170 OhmsGreen
by Jon PardueSarasota, Florida USA
DCA
Black/Red(MAGNETO COIL) Black/White
(KILL SWITCH)
Green(GROUND WIRE)
cdimodule
COM
CEN-TECH
DIGITALMULTIMETER
V mAW
2000
OFF ON
Jon Pardue November 6 2007
88
Green
Blue/White from Engine
Meter should read between 50 Ohm and 170 Ohms.This means there is resistance
between the test points.
This Cen-Tech meter displays a 88to the right, indicating a resistance
value within the "good" range.
if its this good its from the labs and workshop of jon pardue
OHMS