P0638

DTC P0638 THROTTLE ACTUATOR CONTROL RANGE/PERFORMANCE (BANK 1)

1. OUTLINE OF DIAGNOSIS
Judge NG when the target opening angle and actual opening angle is mismatched or the current to motor is more than specified duty for specified time continuously.




2. COMPONENT DESCRIPTION




3. ENABLE CONDITION

4. GENERAL DRIVING CYCLE
Always perform the diagnosis continuously when the electronic throttle control is operating.




5. DIAGNOSTIC METHOD
Judge OK and clear NG when the malfunction criteria below are completed.

Time Needed for Diagnosis:




Target opening angle and actual opening angle: 250 milliseconds (For NG) 2,000 milliseconds (For OK) Output duty to drive circuit: 2,000 milliseconds




Details of Judgment (Always 1,000 milliseconds when the actual opening angle
6. DTC CLEAR CONDITION
- When the OK idling cycle was completed 40 times in a row
- When "Clear Memory" was performed (Only engine stopped)

7. MALFUNCTION INDICATOR LIGHT CLEAR CONDITION
- When the OK driving cycle was completed 3 times in a row
- When "Clear Memory" was performed (Only engine stopped)

8. FAIL SAFE
Stop the current to electronic throttle control motor. (Fix the throttle opening angle to 6 degrees.)

9. ECM OPERATION AT DTC SETTING
Memorize the freeze frame data. (For test mode $02)