Component Inspection

■ Check Alternator performance 

1. Connect GDS to DLC (Data Link Cable).
2. Warm up the engine to normal operating temperature.
3. Check the "Current Data  " about related DTC with GDS.
   Fig 1: Scantool Display - Engine Idle After Warm Up & Aircon ON

   Courtesy of KIA MOTORS AMERICA, INC.
   1. Engine Idle after Warm Up
   2. Aircon "On"
   Fig 2: Scantool Display - Approx 2000 RPM & At Acceleration

   Courtesy of KIA MOTORS AMERICA, INC.
   1. Approx. 2000RPM
   2. At Acceleration
4. If the parameter is not similar with shown data, measure related waveforms with GDS.
   Fig 3: Scantool Display - Engine Idle After Warm Up

   Courtesy of KIA MOTORS AMERICA, INC.

   COM → Duty (+) Approx. 34%

   Duty (-) Approx. 66%,

   FR → Duty (+) Approx. 58%

   Duty (-) Approx. 42%,

   Fig 4: Scantool Display - Electrical Load (Engine Idle After Warm Up)

   Courtesy of KIA MOTORS AMERICA, INC.

   COM → Duty (+) Approx. 34%

   Duty (-) Approx. 66%,

   FR → Duty (+) Approx. 96%

   Duty (-) Approx. 4%,

   Duty (+) from FR terminal is increased if electrical loads are ON (Head Lamp and Defrost are ON) ECM controls generation of alternator with duty from FR terminal when electrical Loads turn on.

■ Confirm Part Inspection 

1. Does the Alternator operate properly? (Check variation)

   YES 

   • Go to "Verification of Vehicle Repair " procedure.

   NO 

   • Substitute with a known-good Alternator and check for proper operation. If the problem is corrected, replace Alternator and then go to "Verification of Vehicle Repair " procedure.