P0638

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

1. OUTLINE OF DIAGNOSIS
Judge as 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 CONDITIONS

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




5. DIAGNOSTIC METHOD
Judge as OK and clear the NG when the malfunction criteria are met.

Time Needed for Diagnosis:
- Target opening angle and actual opening angle: 250 milliseconds (For NG) 2000 milliseconds (For OK)
- Output duty to drive circuit: 2000 milliseconds




Details of Judgment Value




Details of Judgment (The actual opening angle is target opening angle is always 1000 milliseconds)

6. DTC CLEAR CONDITION
- When the OK idling cycle is completed 40 times in a row
- When "Clear Memory" is performed (Only engine stop)

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

8. FAIL SAFE
Stop the continuity to the electronic control throttle motor. (Throttle opening is fixed to 6.375 degrees.)

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