P0510

WIRING DIAGRAM

CIRCUIT DESCRIPTION
The ISC actuator installed to the throttle body consists of DC motor, gears, plunger, closed throttle position (CTP, idle) switch, etc. According to the signal from ECM, how much the plunger projects varies. (The ISO actuator controls the minimum throttle valve opening according to signals from ECM.) The closed throttle position (idle) switch consisting of hall integrated circuit, magnet and spring detects whether the plunger of the ISO actuator contacts the throttle lever screw or not and transmits it as ON/ OFF signal to ECM.
- CTP (Idle) switch ON: when plunger of ISC actuator is in contact with throttle lever screw
- CTP (Idle) switch OFF: when plunger is apart from throttle lever screw.





DETECTING CONDITION AND POSSIBLE CAUSE

NOTE: When DTC P0107, P0122, P0450 and/or P0510 are indicated together, it is possible that "Lg" circuit is open.

DTC CONFIRMATION PROCEDURE
1. Turn ignition switch OFF, clear DTC with ignition switch ON and start engine.
2. Increase vehicle speed to 20 mph, 32 km/h and then stop vehicle.
3. Repeat, above step 2, 15 times.
4. Check pending DTC in "ON BOARD TEST" or "PENDING DTC" mode and DTC in "DTC" mode.





INSPECTION