Inspection Procedure

1. Connect a Hi-Scan (Pro) to the data link connector.
2. Start the engine and monitor the MAFS signals.
   1. Specification (MAFS signal voltage):

      0.6 ~ 1.0 V at idle

      1.7 ~ 2.0 V at 3000 rpm

Is signal within specification?

1. No:  Go to next step.
2. Yes: Problem is intermittent or was repaired and ECM memory was not cleared. See INTERMITTENT PROBLEM INSPECTION PROCEDURE ..

Check the MAFS and ECM for poor connection, misplaced, bent, loose or corroded terminals. See CONNECTOR INSPECTION PROCEDURE .

Are both connectors good?

1. Yes:  Go to next step.
2. No: Repair or replace it.

1. Turn ignition switch to OFF position and disconnect MAFS and ECM connectors.
2. Turn ignition switch to ON position.
3. Measure voltage between terminal 3 of the MAFS harness connector and chassis ground. Specification (Resistance): below 0.5 V
   Fig 1: Check For Short To Power In Harness

   Courtesy of KIA MOTORS AMERICA, INC.

Is voltage within specification?

1. Yes:  Go to next step.
2. No: Repair short to power in harness.

1. Reconnect the ECM and MAFS connectors.
2. Connect a Hi-Scan (Pro) to the data link connector.
3. Start the engine and monitor the MAFS signals.
   • Specification (MAFS signal voltage):

     0.6 ~ 1.0 V at idle

     1.7 ~ 2.0 V at 3000 rpm

Is signal within specification?

1. Yes:  Proceed with ECM PROBLEM INSPECTION PROCEDURE .
2. No: Replace MAFS.