System Inspection

Engine Control

P0638 Throttle Actuator Control Range/Performance (Bank 1) - System Inspection

System Inspection

Visual Inspection
1. Check the installation condition between MAPS and throttle body.
2. Check deforamtion, crack or installation of throttle valve (body)
3. Has a problem been found?





Check MAPS
1. IG "OFF" and install a scantool
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.








4. Is the relationship between the MAP and the TPS correct?