Idle speed adjustment is performed under the following conditions:
Engine at normal operating temperature.
- Connect the hand held OBD II scan tool to the DLC3 under the drivers side lower dash panel.
- Race the engine idle speed to 2500 rpm for approximately 90 seconds with the cooling fan off.
- Check the idle speed. If the speed is not correct, check the Idle Air Control (IAC) system.
- Disconnect the OBD II scan tool.
Idle speed is maintained by the Powertrain Control Module (PCM). No adjustment is necessary or possible.