Ignition system check

IG KEY "OFF".
Disconnect ignition coil harness connectors from the ignition coils.
Do visual inspection.
- Check contamination or damage on the ignition coils.
IG KEY "ON" & ENG "OFF".
Measure the voltage between power terminal of ignition coil #1, #2, #3, #4, #5 and #6 harness connectors and chassis ground.
Specification: Approx 12V
Connect ignition coil harness connectors to the ignition coils.
Compare with the below reference value and ignition primary waveform and determine whether the values are normal or not.

Fig 1: Screen Display - Engine Idle After Warm Up
Courtesy of KIA MOTORS AMERICA, INC.

Primary Ignition control time - Approx. 1965us

CH. A - Primary Ignition Max 140V

CH. AUX - Primary Ignition Current MAX 6.75A
Is measured value within specification?
YES
- Go to "CHECK INJECTOR PERFORMANCE " procedure.
NO
- Carefully re-do this troubleshooting guide steps.
- If no problems were found with the circuits or connectors, replace the Ignition Coil and go to "VERIFICATION OF VEHICLE REPAIR " procedure.