Power Circuit Inspection

Check Power Supply
1. Ignition "OFF"
2. Disconnect MAF sensor connector.
3. Ignition "ON" & Engine "OFF"
4. Measure voltage between terminal 4 of MAF sensor harness connector and chassis ground.
  Specification: Approx. B+
  
  Fig 1: Measuring Voltage Between Terminal 4 Of MAF Sensor Harness Connector And Chassis Ground
  Courtesy of KIA MOTORS AMERICA, INC.
5. Is the measured voltage within specifications?
  YES
  - Go to "Check MAFS Power" as below.
  NO
  - Check that Fuse is installed or blown off between control relay and MAF sensor.
  - Check open in harenss between control relay and MAF sensor.
  - Repair or replace as necessary and then, go to "VERIFICATION OF VEHICLE REPAIR " procedure.
Check MAFS Power
1. Ignition "OFF"
2. Disconnect MAF sensor connector.
3. Ignition "ON" & Engine "OFF"
4. Measure voltage between terminal 2 of MAF sensor harness connector and chassis ground.
  Specification: Approx. 5V
  
  Fig 2: Measuring Voltage Between Terminal 2 Of Maf Sensor Harness Connector And Chassis Ground
  Courtesy of KIA MOTORS AMERICA, INC.
5. Is the measured voltage within specifications?
  YES
  - Go to "SIGNAL CIRCUIT INSPECTION " procedure.
  NO
  - Check open in harenss between control relay and MAF sensor.
  - Repair or replace as necessary and then, go to "VERIFICATION OF VEHICLE REPAIR " procedure.