System Inspection

Engine Control
P1523 ETC (Electronic Throttle Control) System Malfunction - Throttle Valve Stuck - Inspection/Repair:_:System Inspection

System Inspection

1. Visual Inspection
(1) IG "OFF".
(2) Check throttle valve after removing air duct.
- Carbon deposit.
- Throttle icy
- Broken return spring.
- Throttle sticky
(3) Is the throttle valve return O.K ?
YES
> Thoroughly Check throttle plate area for obstruction and perform ETS Initialization as follows and then, go to "Verification of Vehicle Repair" procedure.
NO
> Repair or replace as necessary and then, do ETS Initialization" as follows. then, go to "Verification of Vehicle Repair" procedure.

** Procedure of ETS Initialization
1. Erase the trouble codes on PCM
2. Turn the ignition key off and maintain this condition until the main relay is turned off.(It will take 10sec.)
3. Turn ignition key on more than 1second to record the throttle motor position on the EEPROM