On-Vehicle Inspection

INSPECT THROTTLE BODY IDLE SPEED CONTROL VALVE ASSY
NOTE:
- Since the Idle Speed Control Valve (ISC valve) has an internal IC circuit which converts the ECM duty signal into the drive signal, it is impossible to check its re-sister value and valve operation with the valve alone.
- Clear the DTC after inspection.
HINT: DTC P0505 will be set when the ISC valve is stuck.
1. Check the operation
  1. Connect the ISC valve connector to the ISC valve.
  2. Check the valve movement when the ignition switch is turned ON.
    Movement: Half open --> fully close --> fully open --> half open
    
    HINT:
    
    The series of the valve movement mentioned above is done within 0.5 second.
    
    Fig 1: Checking Valve Movement When Ignition Switch Is Turned ON
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002