Tacoma Extra Cab 2WD L4-2438cc 2.4L DOHC MFI (1997)
Idle Speed/Throttle Actuator - Electronic: Diagnostic Trouble Code Tests and Associated Procedures
DTC P0505 Idle Control System Malfunction
CIRCUIT DESCRIPTION
The rotary solenoid type IAC valve is located in front of the intake air chamber and intake air bypassing the throttle valve is directed to the IAC
valve through a passage.
In this way the intake air volume bypassing the throttle valve is regulated, controlling the engine speed.
The ECM operates only the IAC valve to perform idle-up and provide feedback for the target idling speed.
DETECTING CONDITION
WIRING DIAGRAM
Step 1
