Throttle Opener: Es300
- Start and warm engine up to normal operating temperature. Shut engine off. Connect scan tool to DLC3. See Figure. Use scan tool to read engine RPM.
- Apply parking brake. Place transaxle in Neutral. Start engine and maintain engine at 2500 RPM for 90 seconds and then allow engine to idle. Ensure idle speed is 650-750 RPM.
- Shut engine off. Disconnect and plug vacuum hose at throttle opener near throttle body. See Fig 1. Start engine and note engine speed. Engine speed should be 1100-1700 RPM.
- If engine speed is not within specification, replace throttle body. Shut engine off. Reinstall vacuum hose on throttle opener. Start engine and ensure engine returns to proper idle speed.
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