System Inspection

Engine Control
P0638 Throttle Actuator Control Range/Performance (Bank 1) - Inspection/Repair:_: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 ?





** Procedure of ETS Initialization
A. Erase the trouble codes on PCM
B. Turn the ignition key "OFF" until the main relay is turned off. (It will take about 10 sec.)
C. 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 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?