Idle Speed: Service and Repair

ECM/PCM Idle Learn Procedure

NOTE: The ECM/PCM reset procedure and disconnecting the battery or the No.6 ECU (ECM/PCM) (15 A) fuse cancels the ECM/PCM memory for idle control. The following procedure is needed after the ECM/PCM reset procedure and reconnecting the battery or the No.6 ECU (ECM/PCM) (15 A) fuse.

1. Start the engine. Hold the engine at 3,000 rpm with no load (in Park or neutral) until the radiator fan comes on.
2. Let the engine idle for approx. 5 minutes under the following conditions:
- Transmission in Park or neutral
- A/C switch OFF
- Headlights OFF
- Rear defogger OFF