## ECM/PCM Idle Learn Procedure

The idle learn procedure must be done so that the ECM/PCM can learn the engine idle characteristics.
Do the idle learn procedure whenever you do any of these actions:

- Disconnect the battery.
- Replace the ECM/PCM or disconnect its connector.
- Reset the ECM/PCM.
  NOTE: Erasing DTCs with HDS does require the idle learn procedure to be done again.
- Remove the No. 14 (15 A) fuse from the under-dash fuse/relay box.
- Remove the No. 1 (80 A) and No. 6 (40 A) fuses from the under-hood fuse/relay box.
- Remove the PGM-FI main relay.
- Remove the battery wire from the under-hood fuse/relay box.
- Disconnect any of the connectors from the under-hood fuse/relay box.
- Disconnect the G1 terminal from the transmission housing.
- Adjust the idle speed.

Procedure:
To complete the idle learn procedure do this:

1. | Make sure all electrical items (A/C, audio, rear defogger, lights, etc.) are turned off.

2. | Start the engine. Hold the engine speed at 3,000 rpm (min-1) without load (in Park or neutral) until the radiator fan comes on, or the engine coolant temperature reaches 80 °C (176 °F) - 100 °C (221 °F).

3. | Let the engine idle for about 5 minutes with the throttle fully closed and with all electrical items off. NOTE: If the radiator fan comes on during this step, the time when it is operating must not be included in the 5 minutes.