Component Inspection

1. Check air cleaner for dirt, blockage, or damage.
2. Check entire air intake system for leaks or blockages such as:
   • Throttle body
   • PCV valve
   • Intake manifold
   • Gasket between intake manifold and surge tank
   • Seals between intake manifold and fuel injectors
   • Seal between surge tank and PCV pipe
3. Is entire air intake system okay?

   YES 

   • Go to "Check PCM" below.

   NO 

   • Repair as necessary and then go to "VERIFICATION OF VEHICLE REPAIR " procedure

The purpose of checking PCM is to determine whether there is any malfunction of PCM.

1. Ignition "OFF"
2. Connect scan tool and Engine "ON "
3. Select simulation function on scan tool.
4. Simulate voltage at terminal 1 of MAP sensor signal connector.
5. Verify MAP voltage to change while raising or lowering simulation voltage with scan tool within 0.5~3.5 V

   Specification: If the data is changeable as simulation voltage changes, it's OK

   Fig 1: Identifying Scan Tool Display (Simulate Voltage)

   Courtesy of HYUNDAI MOTOR CO.
6. Is MAP sensor signal value changed according to simulation voltage ?

   YES 

   • Check MAPS for contamination, deterioration, or damage. Clean MAPS with suitable cleaner as necessary and let air dry before reinstalling. If problem still exists, Substitute with a known-good MAPS and check for proper operation.

     If the problem is corrected, replace MAPS and then go to "VERIFICATION OF VEHICLE REPAIR " procedure

   NO 

   • Substitute with a known-good PCM and check for proper operation. If the problem is corrected, replace PCM and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.