1.
Check ECM.
(1)
IGN "ON" & Engine "OFF".
(2)
Neutralize ECM and Register transponder key by scantool.
note
Pin code is requied to Neutralize ECM and to Register transponder key
(3)
Are Neutralizing and Registering completed normally ?
 | ▶ Check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to "Verification of Vehicle Repair" procedure. |
 | ▶ Substitute with a known-good ECM and perform key teaching procedure. ▶ If the problem is corrected, replace ECM and then go to "Verification of Vehicle Repair" procedure. |
note
ECM substitued for old one must be in "Virgin" or "Neutral" status and Pin code is required to Neutralize ECM and to Register transponder key
