Idle Speed

A/C-Cut Control System (Camry 2.2L 4-Cyl. CNG & Gasoline Models, Camry Solara 2.2L 4-Cyl., Corolla, Highlander, MR2, Prius & RAV4)

Engine Control Module (ECM) uses various input signals for controlling A/C-cut control system. A/C-cut control system interrupts A/C compressor operation for a fixed period of time when vehicle accelerates from low engine speed.

Dashpot (Tacoma 3.4L V6 With M/T)

Dashpot is mounted on throttle body and is used to allow engine to slowly return to specified RPM after throttle is released.

Idle Speed Control System (Avalon, Camry, Camry Solara, Celica, Corolla, ECHO, Highlander, 2000 MR2, 2001 MR2 With Standard Type Manual Transaxle, RAV4, Sienna, Tacoma & Tundra 3.4L V6)

Idle speed control system may also be referred to as idle air control system. Engine Control Module (ECM) is programmed with engine idle speed values. Idle speed control system provides a stable idle speed when engine is cold, or idle speed decreases due to electrical load etc. ECM uses various input signals to maintain proper idle speed by controlling Idle Air Control (IAC) valve.

Throttle Control Motor (Land Cruiser, Prius, Sequoia, Tundra 4.7L V8 & 4Runner)

Throttle control motor is used with Electronic Throttle Control System (ETCS) for controlling throttle operation and idle speed. See ELECTRONIC THROTTLE CONTROL SYSTEM under AIR INDUCTION SYSTEMS for additional information.

Throttle Control Motor (2001 MR2 With Sequential Manual Transaxle)

There are 2 types of manual transaxles used for this model. The standard type manual transaxle in which the driver operates the clutch and shifts the transaxle, and the sequential manual transaxle, which is electronically controlled and the clutch is operated and transaxle is shifted hydraulically by moving the shift lever forward or backward. The sequential manual transaxle may be identified by the shift lever pattern. Shift lever pattern consists of "R", "N", "S" and "+" in place of the conventional type shift lever pattern and there is no clutch pedal. Models with sequential manual transaxle use the throttle control motor with Electronic Throttle Control System (ETCS) for controlling throttle operation and idle speed. See ELECTRONIC THROTTLE CONTROL SYSTEM under AIR INDUCTION SYSTEMS for additional information.

Throttle Opener (Avalon, Camry, Camry Solara, Sienna, Tacoma & Tundra 3.4L V6)

Throttle opener, mounted on throttle body, is vacuum controlled and allows engine to return to specified RPM after throttle is released.

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