Control Circuit Inspection

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

NOTE: Normal waveform with ignition "ON"

Fig 1: Identifying Signal Waveform
Is voltage within the specification?
YES
- Go to TERMINAL AND CONNECTOR INSPECTION
NO
- Repair as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure