Testing Ignition Coils

1. I took CIC32R and CIC31 ignition coils.
2. Coil Specifications

Coil	CIC32R	CIC31
Voltage	12V	12V
Primary		3.0 to 4.0R
Secondary		7 to 8KR

3. Check the meter error and deduct that value off your final reading.

4. Obtain a multimeter.

5. Turn the meter rotary switch to the 200 ohm position. touch the positive and negative leads together and note your default error.

The resistance of multimeter is 0.2R

6. Carry out tests and record your findings

Primary coil testing

Secondary coil testing

Coil	Primary	Secondary	Earth Leakage
CIC32R	1.6-0.2=1.4R	8.99KR	OL

Primary coil testing

Secondary coil testing

Coil	Primary	Secondary	Earth Leakage
CIC31	3.1-0.2=2.9R	9.63KR	OL

Both two coils are serviceable.

Wasted Spark Coil Pack

  In wasted spark coil pack, the primary and secondary coils are not connected, and primary coil of cylinder 1,4 and cylinder 2,3 shared one terminals.

wasted spark coil circuit for 6 cylinders.

Test the 4 cylinder wasted spark coil pack.

  Wasted Spark Coil No 1

Two primary coil shared terminals

The total resistance of 2 primary coils

Primary coil 1

Primary coil 2

Secondary coil 1

Secondary coil 2

	Primary coil 1	Primary coil 2	Secondary coil 1	Secondary coil 2
Resistance	0.7-0.2=0.5R	0.7-0.2=0.5R	6.94KR	6.94KR

  Wasted Spark Coil No 2

Two primary coil shared terminals

The total resistance of 2 primary coils

Primary coil 1

Primary coil 2

Secondary coil 1

Secondary coil 2

	Primary coil 1	Premary coil 2	Secondary coil 1	Senondary coil 2
Resistance	0.7-0.2=0.5R	0.7-0.2=0.5R	7.07KR	7.26KR