Component Inspection

Check MAPS Performance

IG "OFF" and install a scantool
Connect probe to MAPS and TPS to check signal waveform by using oscilloscope function.

ENG "ON" and monitor signal waveform during acceleration and deceleration.

Specification: Signal waveform will be displayed as follows.

PRESSURE AND VOLTAGE SPECIFICATIONS

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

Fig 1: MAPS And TPS Signal Waveform

G07252224

Courtesy of HYUNDAI MOTOR CO.

Fig 2: Checking MAPS And TPS Signal Waveform By Using Oscilloscope

G07252225

Courtesy of HYUNDAI MOTOR CO.

Fig 3: Identifying ECM, MAPS And ETC Motor & TPS Connector Terminals

G07252226

Courtesy of HYUNDAI MOTOR CO.

Is the relationship between the MAP and the TPS correct?
YES
- Substitute with a known - good ECM and check for proper operation. If the problem is corrected, replace ECM and go to "VERIFICATION OF VEHICLE REPAIR " procedure.
  NOTE: There is a memory reset function on scantool that can erase optional parts automatically detected and memorized by ECM. Before or after testing ECM on the vehicle, use this function to reuse the ECM on the others
NO
- Substitute with a known - good MAPS and check for proper operation. If the problem is corrected, replace MAPS and go to "VERIFICATION OF VEHICLE REPAIR " procedure.