Check PCM/ECM.
IGN "ON" & Engine "OFF".
Neutralize ECM and Register transponder key by scantool.
Pin code is requied to Neutralize PCM/ECM and to Register transponder key
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 PCM/ECM and then key teaching procedure ▶ If the problem is corrected, replace transponder and then go to "Verification of Vehicle Repair" procedure. |
PCM/ECM substitued for old one must be in "Virgin" or "Neutral" status and Pin code is required to Neutralize PCM/ECM and to Register transponder key
