3.
ENG "ON" and monitor signal waveform during accelleration and decelleration.
Specification : Signal waveform will be displayed as follows.
Pressure(kPa) | Voltage(V) |
20 | 0.79 |
46.66 | 1.84 |
101.32 | 4.0 |
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 accelleration and decelleration.
Specification : Signal waveform will be displayed as follows.
Pressure(kPa) | Voltage(V) |
20 | 0.79 |
46.66 | 1.84 |
101.32 | 4.0 |
Is the relationship between the MAP and the TPS correct ?
 | ▶ 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 |
 | ▶ 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. |
