Control Circuit Inspection

With ignition OFF, disconnect alternator connector.
Ignition "ON" and Engine "OFF".
Measure voltage between terminals 3 of the alternator harness connector and chassis ground.
Specification : Approx. 9~10V

Fig 1: Measuring Voltage Between Terminals 3 Of Alternator Harness Connector And Chassis Ground
Courtesy of KIA MOTORS AMERICA, INC.

NOTE: Normal waveform with ignition "ON"

Fig 2: Waveform Signal For Alternator
Courtesy of KIA MOTORS AMERICA, INC.
Is voltage within the specification?
YES
- Check for poor connection between ECM and component: backed out terminal, improper mating, broken locks or poor terminal to wire connection. Repair as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure.
NO
- Repair as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure.