ECM Idle Learn Procedure: Notes

The idle learn procedure must be done so that the ECM can learn the engine idle characteristics.

Do the idle learn procedure whenever you do any of these actions:

• Disconnect the battery.
• Replace ECM or disconnect any of its connectors.
• Replace or clean the throttle body.
• Reset ECM.
• Update ECM.
  NOTE: Erasing DTCs with the HDS does not require the idle learn procedure to be done again.
• Remove the No. 18 (7.5 A) fuse from the under-dash fuse/relay box.
• Remove the No. 2 (80 A) fuse from the under-hood fuse/relay box.
• Remove the No. 7 (15 A) fuse 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 connector (C103, C502) between the dashboard wire harness and engine wire harness.
• Disconnect the G1 terminal from the transmission housing.
• Adjust the idle speed.