Highlander Toyota MR2 W30

1. Idle speed is controlled by Engine Control Module (ECM) and is not adjustable. Check idle speed with engine at normal operating temperature, transaxle in Neutral, parking brake applied, air cleaner and all air intake hoses installed, all vacuum hoses installed, electronic fuel injection system wiring connectors properly installed, ignition timing properly set, electric cooling fan off, and A/C and all accessories off.
2. If Toyota hand-held tester is available, go to next step. If Toyota hand-held tester is not available, go to step 6.
3. Start engine and warm engine to normal operating temperature. Shut engine off. Connect Toyota hand-held tester to data link connector No. 3 at driver's side of instrument panel. see scheme 79 Hand-held tester is used to read engine RPM.
4. Apply parking brake. Place transaxle in Neutral. Start engine and allow engine to idle while noting idle speed. Ensure idle speed is within specification. See «IDLE SPEED SPECIFICATIONS»(ref-151948-S26559886692003010900000) table. Shut engine off. Remove hand-held tester.
5. If idle speed is not within specification, check air intake system. If air intake system is okay, check throttle body. See «IDLE CONTROL SYSTEMS»(ref-151978-S33128183002003010900000) in SYSTEM & COMPONENT TESTING - 4-CYLINDER article.
6. Start engine and warm engine to normal operating temperature. Shut engine off. Note location of data link connector No. 3 at driver's side of instrument panel. see scheme 79 Using Jumper Wire (SST 09843-18040), connect tachometer lead to terminal No. 9 (TAC) on data link connector No. 3. see scheme 72
7. Apply parking brake. Place transaxle in Neutral. Start engine and allow engine to idle while noting idle speed. Ensure idle speed is within specification. See «IDLE SPEED SPECIFICATIONS»(ref-151948-S26559886692003010900000) table. Shut engine off. Disconnect tachometer.
8. If idle speed is not within specification, check air intake system. If air intake system is okay, check throttle body. See «IDLE CONTROL SYSTEMS»(ref-151978-S33128183002003010900000) in SYSTEM & COMPONENT TESTING - 4-CYLINDER article.

MR2

1. Idle speed is controlled by Engine Control Module (ECM) and is not adjustable. Check idle speed with engine at normal operating temperature, transaxle in Neutral, parking brake applied, air cleaner and all air intake hoses installed, all vacuum hoses installed, electronic fuel injection system wiring connectors properly installed, ignition timing properly set, electric cooling fan off (if equipped), and A/C and all accessories off.
2. Start engine and warm engine to normal operating temperature. Shut engine off. Connect Toyota hand-held tester or scan tool to data link connector No. 3 at driver's side of instrument panel. (Scheme 88) Hand-held tester or scan tool is used to read engine RPM.
3. Apply parking brake. Place transaxle in Neutral. Start engine and maintain engine at 2500 RPM for 90 seconds and then allow engine to idle while noting idle speed. Ensure idle speed is within specification. See «IDLE SPEED SPECIFICATIONS»(ref-151948-S26559886692003010900000) table. Shut engine off. Remove hand-held tester or scan tool.
4. There are 2 types of throttle bodies and idle control systems used depending on type of transaxle used. On models with a standard type manual transaxle in which the driver operates the clutch and shifts the transaxle, a standard type Idle Air Control (IAC) valve used. On this model, if idle speed is not within specification, check Idle Air Control (IAC) valve, wiring and Engine Control Module (ECM), and air intake system. See «IDLE CONTROL SYSTEMS»(ref-151978-S33128183002003010900000) in SYSTEM & COMPONENT TESTING - 4-CYLINDER article.
5. On models with a sequential manual transaxle, the transaxle is electronically controlled and clutch is operated and transaxle is shifted hydraulically by moving shift lever forward or backward. Sequential manual transaxle may be identified by shift lever pattern which consists of "R", "N", "S" and "+" in place of conventional type shift lever pattern and no clutch pedal is used. On this model, if idle speed is not within specification, check air intake system. If air intake system is okay, check throttle body. See «IDLE CONTROL SYSTEMS»(ref-151978-S33128183002003010900000) in SYSTEM & COMPONENT TESTING - 4-CYLINDER article.

Scheme 88