Ignition Coil: Testing

1. Measurement of the primary coil resistance

   Connect the negative (-) terminal of a 3V power supply to terminal 2 of the power transistor; then check whether there is continuity between terminal 3 and terminal 2 when terminal 1 and the positive (+) terminal are connected and disconnected.

   Fig 1: Testing Ignition Coil Resistance

   Courtesy of KIA MOTORS AMERICA, INC.
   Fig 2: Ignition Coil Resistance Chart

   Courtesy of KIA MOTORS AMERICA, INC.

   Replace the ignition coil if there is malfunction.

2. Measurement of the secondary coil resistance

Measure the resistance between the high-voltage terminals of the ignition coil.

Standard value: 13.0 +/- 2.6 (kΩ) 

Fig 3: Measuring The Resistance Between The High-Voltage Terminals Of The Ignition Coil

Courtesy of KIA MOTORS AMERICA, INC.