P0638

DTC P0638 - THROTTLE ACTUATOR CONTROL RANGE/PERFORMANCE (BANK 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.




COMPONENT DESCRIPTION




ENABLE CONDITION

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

DIAGNOSTIC METHOD







Judge OK and clear NG when the malfunction criteria are completed.

DTC CLEAR CONDITION
- When the OK idling cycle was completed 40 times in a row
- When "Clear Memory" was performed (Only engine stopped)

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)

FAIL SAFE
Stop the current to electric control throttle motor. (Fix the throttle opening angle to 6°.)

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