System Inspection

■ Visual Inspection 

1. Check the installation condition between MAPS and throttle body.
2. Check for cracks in Throttle Body and Throttle Valve Binding.
3. Has a problem been found?

   YES 

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

   NO 

   • Go to "Check MAPS" as follows.

Procedure of ETS Initialization

1. Erase the trouble codes on PCM
2. Turn the ignition key "OFF" until the main relay is turned off. (It will take about 10 sec.)
3. Turn ignition key "ON" more than 1 second to record the throttle motor position in the EEPROM

■ Check MAPS 

1. IG "OFF" and install a GDS
2. Connect probe to MAPS and TPS to check signal waveform by using oscilloscope function.
3. ENG "ON" and monitor signal waveform during acceleration and deceleration.

   Specification:  Signal waveform will be displayed as follows.

   Pressure (kPa)	Voltage (V)
   20	0.79
   46.66	1.84
   101.32	4.0

   Fig 1: Screen Display - Signal Waveform Of MAPS And TPS

   Courtesy of HYUNDAI MOTOR AMERICA
4. Is the relationship between the MAP and the TPS correct?

   YES 

   • Go to "COMPONENT INSPECTION " procedure.

   NO 

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